zend_ast.c

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/*
   +----------------------------------------------------------------------+
   | Zend Engine                                                          |
   +----------------------------------------------------------------------+
   | Copyright (c) Zend Technologies Ltd. (http://www.zend.com)           |
   +----------------------------------------------------------------------+
   | This source file is subject to version 2.00 of the Zend license,     |
   | that is bundled with this package in the file LICENSE, and is        |
   | available through the world-wide-web at the following url:           |
   | http://www.zend.com/license/2_00.txt.                                |
   | If you did not receive a copy of the Zend license and are unable to  |
   | obtain it through the world-wide-web, please send a note to          |
   | license@zend.com so we can mail you a copy immediately.              |
   +----------------------------------------------------------------------+
   | Authors: Bob Weinand <bwoebi@php.net>                                |
   |          Dmitry Stogov <dmitry@php.net>                              |
   +----------------------------------------------------------------------+
*/
 
#include "zend_ast.h"
#include "zend_API.h"
#include "zend_operators.h"
#include "zend_language_parser.h"
#include "zend_smart_str.h"
#include "zend_exceptions.h"
#include "zend_constants.h"
#include "zend_enum.h"
 
ZEND_API zend_ast_process_t zend_ast_process = NULL;
 
static inline void *zend_ast_alloc(size_t size) {
    return zend_arena_alloc(&CG(ast_arena), size);
}
 
static inline void *zend_ast_realloc(void *old, size_t old_size, size_t new_size) {
    void *new = zend_ast_alloc(new_size);
    memcpy(new, old, old_size);
    return new;
}
 
static inline size_t zend_ast_list_size(uint32_t children) {
    return sizeof(zend_ast_list) - sizeof(zend_ast *) + sizeof(zend_ast *) * children;
}
 
ZEND_API zend_ast * ZEND_FASTCALL zend_ast_create_znode(znode *node) {
    zend_ast_znode *ast;
 
    ast = zend_ast_alloc(sizeof(zend_ast_znode));
    ast->kind = ZEND_AST_ZNODE;
    ast->attr = 0;
    ast->lineno = CG(zend_lineno);
    ast->node = *node;
    return (zend_ast *) ast;
}
 
static zend_always_inline zend_ast * zend_ast_create_zval_int(zval *zv, uint32_t attr, uint32_t lineno) {
    zend_ast_zval *ast;
 
    ast = zend_ast_alloc(sizeof(zend_ast_zval));
    ast->kind = ZEND_AST_ZVAL;
    ast->attr = attr;
    ZVAL_COPY_VALUE(&ast->val, zv);
    Z_LINENO(ast->val) = lineno;
    return (zend_ast *) ast;
}
 
ZEND_API zend_ast * ZEND_FASTCALL zend_ast_create_zval_with_lineno(zval *zv, uint32_t lineno) {
    return zend_ast_create_zval_int(zv, 0, lineno);
}
 
ZEND_API zend_ast * ZEND_FASTCALL zend_ast_create_zval_ex(zval *zv, zend_ast_attr attr) {
    return zend_ast_create_zval_int(zv, attr, CG(zend_lineno));
}
 
ZEND_API zend_ast * ZEND_FASTCALL zend_ast_create_zval(zval *zv) {
    return zend_ast_create_zval_int(zv, 0, CG(zend_lineno));
}
 
ZEND_API zend_ast * ZEND_FASTCALL zend_ast_create_zval_from_str(zend_string *str) {
    zval zv;
    ZVAL_STR(&zv, str);
    return zend_ast_create_zval_int(&zv, 0, CG(zend_lineno));
}
 
ZEND_API zend_ast * ZEND_FASTCALL zend_ast_create_zval_from_long(zend_long lval) {
    zval zv;
    ZVAL_LONG(&zv, lval);
    return zend_ast_create_zval_int(&zv, 0, CG(zend_lineno));
}
 
ZEND_API zend_ast * ZEND_FASTCALL zend_ast_create_constant(zend_string *name, zend_ast_attr attr) {
    zend_ast_zval *ast;
 
    ast = zend_ast_alloc(sizeof(zend_ast_zval));
    ast->kind = ZEND_AST_CONSTANT;
    ast->attr = attr;
    ZVAL_STR(&ast->val, name);
    Z_LINENO(ast->val) = CG(zend_lineno);
    return (zend_ast *) ast;
}
 
ZEND_API zend_ast * ZEND_FASTCALL zend_ast_create_class_const_or_name(zend_ast *class_name, zend_ast *name) {
    zend_string *name_str = zend_ast_get_str(name);
    if (zend_string_equals_ci(name_str, ZSTR_KNOWN(ZEND_STR_CLASS))) {
        zend_string_release(name_str);
        return zend_ast_create(ZEND_AST_CLASS_NAME, class_name);
    } else {
        return zend_ast_create(ZEND_AST_CLASS_CONST, class_name, name);
    }
}
 
ZEND_API zend_ast *zend_ast_create_decl(
    zend_ast_kind kind, uint32_t flags, uint32_t start_lineno, zend_string *doc_comment,
    zend_string *name, zend_ast *child0, zend_ast *child1, zend_ast *child2, zend_ast *child3, zend_ast *child4
) {
    zend_ast_decl *ast;
 
    ast = zend_ast_alloc(sizeof(zend_ast_decl));
    ast->kind = kind;
    ast->attr = 0;
    ast->start_lineno = start_lineno;
    ast->end_lineno = CG(zend_lineno);
    ast->flags = flags;
    ast->doc_comment = doc_comment;
    ast->name = name;
    ast->child[0] = child0;
    ast->child[1] = child1;
    ast->child[2] = child2;
    ast->child[3] = child3;
    ast->child[4] = child4;
 
    return (zend_ast *) ast;
}
 
#if ZEND_AST_SPEC
ZEND_API zend_ast * ZEND_FASTCALL zend_ast_create_0(zend_ast_kind kind) {
    zend_ast *ast;
 
    ZEND_ASSERT(kind >> ZEND_AST_NUM_CHILDREN_SHIFT == 0);
    ast = zend_ast_alloc(zend_ast_size(0));
    ast->kind = kind;
    ast->attr = 0;
    ast->lineno = CG(zend_lineno);
 
    return ast;
}
 
ZEND_API zend_ast * ZEND_FASTCALL zend_ast_create_1(zend_ast_kind kind, zend_ast *child) {
    zend_ast *ast;
    uint32_t lineno;
 
    ZEND_ASSERT(kind >> ZEND_AST_NUM_CHILDREN_SHIFT == 1);
    ast = zend_ast_alloc(zend_ast_size(1));
    ast->kind = kind;
    ast->attr = 0;
    ast->child[0] = child;
    if (child) {
        lineno = zend_ast_get_lineno(child);
    } else {
        lineno = CG(zend_lineno);
    }
    ast->lineno = lineno;
 
    return ast;
}
 
ZEND_API zend_ast * ZEND_FASTCALL zend_ast_create_2(zend_ast_kind kind, zend_ast *child1, zend_ast *child2) {
    zend_ast *ast;
    uint32_t lineno;
 
    ZEND_ASSERT(kind >> ZEND_AST_NUM_CHILDREN_SHIFT == 2);
    ast = zend_ast_alloc(zend_ast_size(2));
    ast->kind = kind;
    ast->attr = 0;
    ast->child[0] = child1;
    ast->child[1] = child2;
    if (child1) {
        lineno = zend_ast_get_lineno(child1);
    } else if (child2) {
        lineno = zend_ast_get_lineno(child2);
    } else {
        lineno = CG(zend_lineno);
    }
    ast->lineno = lineno;
 
    return ast;
}
 
ZEND_API zend_ast * ZEND_FASTCALL zend_ast_create_3(zend_ast_kind kind, zend_ast *child1, zend_ast *child2, zend_ast *child3) {
    zend_ast *ast;
    uint32_t lineno;
 
    ZEND_ASSERT(kind >> ZEND_AST_NUM_CHILDREN_SHIFT == 3);
    ast = zend_ast_alloc(zend_ast_size(3));
    ast->kind = kind;
    ast->attr = 0;
    ast->child[0] = child1;
    ast->child[1] = child2;
    ast->child[2] = child3;
    if (child1) {
        lineno = zend_ast_get_lineno(child1);
    } else if (child2) {
        lineno = zend_ast_get_lineno(child2);
    } else if (child3) {
        lineno = zend_ast_get_lineno(child3);
    } else {
        lineno = CG(zend_lineno);
    }
    ast->lineno = lineno;
 
    return ast;
}
 
ZEND_API zend_ast * ZEND_FASTCALL zend_ast_create_4(zend_ast_kind kind, zend_ast *child1, zend_ast *child2, zend_ast *child3, zend_ast *child4) {
    zend_ast *ast;
    uint32_t lineno;
 
    ZEND_ASSERT(kind >> ZEND_AST_NUM_CHILDREN_SHIFT == 4);
    ast = zend_ast_alloc(zend_ast_size(4));
    ast->kind = kind;
    ast->attr = 0;
    ast->child[0] = child1;
    ast->child[1] = child2;
    ast->child[2] = child3;
    ast->child[3] = child4;
    if (child1) {
        lineno = zend_ast_get_lineno(child1);
    } else if (child2) {
        lineno = zend_ast_get_lineno(child2);
    } else if (child3) {
        lineno = zend_ast_get_lineno(child3);
    } else if (child4) {
        lineno = zend_ast_get_lineno(child4);
    } else {
        lineno = CG(zend_lineno);
    }
    ast->lineno = lineno;
 
    return ast;
}
 
ZEND_API zend_ast * ZEND_FASTCALL zend_ast_create_5(zend_ast_kind kind, zend_ast *child1, zend_ast *child2, zend_ast *child3, zend_ast *child4, zend_ast *child5) {
    zend_ast *ast;
    uint32_t lineno;
 
    ZEND_ASSERT(kind >> ZEND_AST_NUM_CHILDREN_SHIFT == 5);
    ast = zend_ast_alloc(zend_ast_size(5));
    ast->kind = kind;
    ast->attr = 0;
    ast->child[0] = child1;
    ast->child[1] = child2;
    ast->child[2] = child3;
    ast->child[3] = child4;
    ast->child[4] = child5;
    if (child1) {
        lineno = zend_ast_get_lineno(child1);
    } else if (child2) {
        lineno = zend_ast_get_lineno(child2);
    } else if (child3) {
        lineno = zend_ast_get_lineno(child3);
    } else if (child4) {
        lineno = zend_ast_get_lineno(child4);
    } else if (child5) {
        lineno = zend_ast_get_lineno(child5);
    } else {
        lineno = CG(zend_lineno);
    }
    ast->lineno = lineno;
 
    return ast;
}
 
ZEND_API zend_ast * ZEND_FASTCALL zend_ast_create_va(
        zend_ast_kind kind, zend_ast_attr attr, va_list *va) {
    uint32_t lineno = (uint32_t)-1;
    uint32_t children = kind >> ZEND_AST_NUM_CHILDREN_SHIFT;
    zend_ast *ast = zend_ast_alloc(zend_ast_size(children));
    ast->kind = kind;
    ast->attr = attr;
    for (uint32_t i = 0; i < children; i++) {
        ast->child[i] = va_arg(*va, zend_ast *);
        if (lineno != (uint32_t)-1 && ast->child[i]) {
            lineno = zend_ast_get_lineno(ast->child[i]);
        }
    }
    if (lineno == (uint32_t)-1) {
        lineno = CG(zend_lineno);
    }
    ast->lineno = lineno;
    return ast;
}
 
ZEND_API zend_ast * zend_ast_create_n(unsigned kind, ...) {
    va_list va;
    va_start(va, kind);
    zend_ast *ast = zend_ast_create_va(kind, 0, &va);
    va_end(va);
    return ast;
}
 
ZEND_API zend_ast * zend_ast_create_ex_n(
        zend_ast_kind kind, unsigned attr, ...) {
    va_list va;
    va_start(va, attr);
    zend_ast *ast = zend_ast_create_va(kind, attr, &va);
    va_end(va);
    return ast;
}
 
ZEND_API zend_ast * ZEND_FASTCALL zend_ast_create_list_0(zend_ast_kind kind) {
    zend_ast *ast;
    zend_ast_list *list;
 
    ast = zend_ast_alloc(zend_ast_list_size(4));
    list = (zend_ast_list *) ast;
    list->kind = kind;
    list->attr = 0;
    list->lineno = CG(zend_lineno);
    list->children = 0;
 
    return ast;
}
 
ZEND_API zend_ast * ZEND_FASTCALL zend_ast_create_list_1(zend_ast_kind kind, zend_ast *child) {
    zend_ast *ast;
    zend_ast_list *list;
    uint32_t lineno;
 
    ast = zend_ast_alloc(zend_ast_list_size(4));
    list = (zend_ast_list *) ast;
    list->kind = kind;
    list->attr = 0;
    list->children = 1;
    list->child[0] = child;
    if (child) {
        lineno = zend_ast_get_lineno(child);
        if (lineno > CG(zend_lineno)) {
            lineno = CG(zend_lineno);
        }
    } else {
        lineno = CG(zend_lineno);
    }
    list->lineno = lineno;
 
    return ast;
}
 
ZEND_API zend_ast * ZEND_FASTCALL zend_ast_create_list_2(zend_ast_kind kind, zend_ast *child1, zend_ast *child2) {
    zend_ast *ast;
    zend_ast_list *list;
    uint32_t lineno;
 
    ast = zend_ast_alloc(zend_ast_list_size(4));
    list = (zend_ast_list *) ast;
    list->kind = kind;
    list->attr = 0;
    list->children = 2;
    list->child[0] = child1;
    list->child[1] = child2;
    if (child1) {
        lineno = zend_ast_get_lineno(child1);
        if (lineno > CG(zend_lineno)) {
            lineno = CG(zend_lineno);
        }
    } else if (child2) {
        lineno = zend_ast_get_lineno(child2);
        if (lineno > CG(zend_lineno)) {
            lineno = CG(zend_lineno);
        }
    } else {
        list->children = 0;
        lineno = CG(zend_lineno);
    }
    list->lineno = lineno;
 
    return ast;
}
#else
static zend_ast *zend_ast_create_from_va_list(zend_ast_kind kind, zend_ast_attr attr, va_list va) {
    uint32_t i, children = kind >> ZEND_AST_NUM_CHILDREN_SHIFT;
    zend_ast *ast;
 
    ast = zend_ast_alloc(zend_ast_size(children));
    ast->kind = kind;
    ast->attr = attr;
    ast->lineno = (uint32_t) -1;
 
    for (i = 0; i < children; ++i) {
        ast->child[i] = va_arg(va, zend_ast *);
        if (ast->child[i] != NULL) {
            uint32_t lineno = zend_ast_get_lineno(ast->child[i]);
            if (lineno < ast->lineno) {
                ast->lineno = lineno;
            }
        }
    }
 
    if (ast->lineno == UINT_MAX) {
        ast->lineno = CG(zend_lineno);
    }
 
    return ast;
}
 
ZEND_API zend_ast *zend_ast_create_ex(zend_ast_kind kind, zend_ast_attr attr, ...) {
    va_list va;
    zend_ast *ast;
 
    va_start(va, attr);
    ast = zend_ast_create_from_va_list(kind, attr, va);
    va_end(va);
 
    return ast;
}
 
ZEND_API zend_ast *zend_ast_create(zend_ast_kind kind, ...) {
    va_list va;
    zend_ast *ast;
 
    va_start(va, kind);
    ast = zend_ast_create_from_va_list(kind, 0, va);
    va_end(va);
 
    return ast;
}
 
ZEND_API zend_ast *zend_ast_create_list(uint32_t init_children, zend_ast_kind kind, ...) {
    zend_ast *ast;
    zend_ast_list *list;
 
    ast = zend_ast_alloc(zend_ast_list_size(4));
    list = (zend_ast_list *) ast;
    list->kind = kind;
    list->attr = 0;
    list->lineno = CG(zend_lineno);
    list->children = 0;
 
    {
        va_list va;
        uint32_t i;
        va_start(va, kind);
        for (i = 0; i < init_children; ++i) {
            zend_ast *child = va_arg(va, zend_ast *);
            ast = zend_ast_list_add(ast, child);
            if (child != NULL) {
                uint32_t lineno = zend_ast_get_lineno(child);
                if (lineno < ast->lineno) {
                    ast->lineno = lineno;
                }
            }
        }
        va_end(va);
    }
 
    return ast;
}
#endif
 
zend_ast *zend_ast_create_concat_op(zend_ast *op0, zend_ast *op1) {
    if (op0->kind == ZEND_AST_ZVAL && op1->kind == ZEND_AST_ZVAL) {
        zval *zv0 = zend_ast_get_zval(op0);
        zval *zv1 = zend_ast_get_zval(op1);
        if (!zend_binary_op_produces_error(ZEND_CONCAT, zv0, zv1) &&
                concat_function(zv0, zv0, zv1) == SUCCESS) {
            zval_ptr_dtor_nogc(zv1);
            return zend_ast_create_zval(zv0);
        }
    }
    return zend_ast_create_binary_op(ZEND_CONCAT, op0, op1);
}
 
static inline bool is_power_of_two(uint32_t n) {
    return ((n != 0) && (n == (n & (~n + 1))));
}
 
ZEND_API zend_ast * ZEND_FASTCALL zend_ast_list_add(zend_ast *ast, zend_ast *op) {
    zend_ast_list *list = zend_ast_get_list(ast);
    if (list->children >= 4 && is_power_of_two(list->children)) {
            list = zend_ast_realloc(list,
            zend_ast_list_size(list->children), zend_ast_list_size(list->children * 2));
    }
    list->child[list->children++] = op;
    return (zend_ast *) list;
}
 
static zend_result zend_ast_add_array_element(zval *result, zval *offset, zval *expr)
{
    if (Z_TYPE_P(offset) == IS_UNDEF) {
        if (!zend_hash_next_index_insert(Z_ARRVAL_P(result), expr)) {
            zend_throw_error(NULL,
                "Cannot add element to the array as the next element is already occupied");
            return FAILURE;
        }
        return SUCCESS;
    }
 
    if (array_set_zval_key(Z_ARRVAL_P(result), offset, expr) == FAILURE) {
        return FAILURE;
    }
 
    zval_ptr_dtor_nogc(offset);
    zval_ptr_dtor_nogc(expr);
    return SUCCESS;
}
 
static zend_result zend_ast_add_unpacked_element(zval *result, zval *expr) {
    if (EXPECTED(Z_TYPE_P(expr) == IS_ARRAY)) {
        HashTable *ht = Z_ARRVAL_P(expr);
        zval *val;
        zend_string *key;
 
        ZEND_HASH_FOREACH_STR_KEY_VAL(ht, key, val) {
            if (key) {
                zend_hash_update(Z_ARRVAL_P(result), key, val);
            } else {
                if (!zend_hash_next_index_insert(Z_ARRVAL_P(result), val)) {
                    zend_throw_error(NULL,
                        "Cannot add element to the array as the next element is already occupied");
                    return FAILURE;
                }
            }
            Z_TRY_ADDREF_P(val);
        } ZEND_HASH_FOREACH_END();
        return SUCCESS;
    }
 
    zend_throw_error(NULL, "Only arrays can be unpacked in constant expression");
    return FAILURE;
}
 
static zend_class_entry *zend_ast_fetch_class(zend_ast *ast, zend_class_entry *scope)
{
    return zend_fetch_class_with_scope(zend_ast_get_str(ast), (ast->attr >> ZEND_CONST_EXPR_NEW_FETCH_TYPE_SHIFT) | ZEND_FETCH_CLASS_EXCEPTION, scope);
}
 
ZEND_API zend_result ZEND_FASTCALL zend_ast_evaluate_inner(
    zval *result,
    zend_ast *ast,
    zend_class_entry *scope,
    bool *short_circuited_ptr,
    zend_ast_evaluate_ctx *ctx
);
 
ZEND_API zend_result ZEND_FASTCALL zend_ast_evaluate_ex(
    zval *result,
    zend_ast *ast,
    zend_class_entry *scope,
    bool *short_circuited_ptr,
    zend_ast_evaluate_ctx *ctx
) {
    zend_string *previous_filename;
    zend_long previous_lineno;
    if (scope) {
        previous_filename = EG(filename_override);
        previous_lineno = EG(lineno_override);
        EG(filename_override) = scope->info.user.filename;
        EG(lineno_override) = zend_ast_get_lineno(ast);
    }
    zend_result r = zend_ast_evaluate_inner(result, ast, scope, short_circuited_ptr, ctx);
    if (scope) {
        EG(filename_override) = previous_filename;
        EG(lineno_override) = previous_lineno;
    }
    return r;
}
 
ZEND_API zend_result ZEND_FASTCALL zend_ast_evaluate_inner(
    zval *result,
    zend_ast *ast,
    zend_class_entry *scope,
    bool *short_circuited_ptr,
    zend_ast_evaluate_ctx *ctx
) {
    zval op1, op2;
    zend_result ret = SUCCESS;
    bool short_circuited;
    *short_circuited_ptr = false;
 
    switch (ast->kind) {
        case ZEND_AST_BINARY_OP:
            if (UNEXPECTED(zend_ast_evaluate_ex(&op1, ast->child[0], scope, &short_circuited, ctx) != SUCCESS)) {
                ret = FAILURE;
            } else if (UNEXPECTED(zend_ast_evaluate_ex(&op2, ast->child[1], scope, &short_circuited, ctx) != SUCCESS)) {
                zval_ptr_dtor_nogc(&op1);
                ret = FAILURE;
            } else {
                binary_op_type op = get_binary_op(ast->attr);
                ret = op(result, &op1, &op2);
                zval_ptr_dtor_nogc(&op1);
                zval_ptr_dtor_nogc(&op2);
            }
            break;
        case ZEND_AST_GREATER:
        case ZEND_AST_GREATER_EQUAL:
            if (UNEXPECTED(zend_ast_evaluate_ex(&op1, ast->child[0], scope, &short_circuited, ctx) != SUCCESS)) {
                ret = FAILURE;
            } else if (UNEXPECTED(zend_ast_evaluate_ex(&op2, ast->child[1], scope, &short_circuited, ctx) != SUCCESS)) {
                zval_ptr_dtor_nogc(&op1);
                ret = FAILURE;
            } else {
                /* op1 > op2 is the same as op2 < op1 */
                binary_op_type op = ast->kind == ZEND_AST_GREATER
                    ? is_smaller_function : is_smaller_or_equal_function;
                op(result, &op2, &op1);
                zval_ptr_dtor_nogc(&op1);
                zval_ptr_dtor_nogc(&op2);
                ret = EG(exception) ? FAILURE : SUCCESS;
            }
            break;
        case ZEND_AST_UNARY_OP:
            if (UNEXPECTED(zend_ast_evaluate_ex(&op1, ast->child[0], scope, &short_circuited, ctx) != SUCCESS)) {
                ret = FAILURE;
            } else {
                unary_op_type op = get_unary_op(ast->attr);
                ret = op(result, &op1);
                zval_ptr_dtor_nogc(&op1);
            }
            break;
        case ZEND_AST_ZVAL:
        {
            zval *zv = zend_ast_get_zval(ast);
 
            ZVAL_COPY(result, zv);
            break;
        }
        case ZEND_AST_CONSTANT:
        {
            zend_string *name = zend_ast_get_constant_name(ast);
            zval *zv = zend_get_constant_ex(name, scope, ast->attr);
 
            if (UNEXPECTED(zv == NULL)) {
                ZVAL_UNDEF(result);
                return FAILURE;
            }
            ZVAL_COPY_OR_DUP(result, zv);
            break;
        }
        case ZEND_AST_CONSTANT_CLASS:
            if (scope) {
                ZVAL_STR_COPY(result, scope->name);
            } else {
                ZVAL_EMPTY_STRING(result);
            }
            break;
        case ZEND_AST_CLASS_NAME:
            if (!scope) {
                zend_throw_error(NULL, "Cannot use \"self\" when no class scope is active");
                return FAILURE;
            }
            if (ast->attr == ZEND_FETCH_CLASS_SELF) {
                ZVAL_STR_COPY(result, scope->name);
            } else if (ast->attr == ZEND_FETCH_CLASS_PARENT) {
                if (!scope->parent) {
                    zend_throw_error(NULL,
                        "Cannot use \"parent\" when current class scope has no parent");
                    return FAILURE;
                }
                ZVAL_STR_COPY(result, scope->parent->name);
            } else {
                ZEND_ASSERT(0 && "Should have errored during compilation");
            }
            break;
        case ZEND_AST_AND:
            if (UNEXPECTED(zend_ast_evaluate_ex(&op1, ast->child[0], scope, &short_circuited, ctx) != SUCCESS)) {
                ret = FAILURE;
                break;
            }
            if (zend_is_true(&op1)) {
                if (UNEXPECTED(zend_ast_evaluate_ex(&op2, ast->child[1], scope, &short_circuited, ctx) != SUCCESS)) {
                    zval_ptr_dtor_nogc(&op1);
                    ret = FAILURE;
                    break;
                }
                ZVAL_BOOL(result, zend_is_true(&op2));
                zval_ptr_dtor_nogc(&op2);
            } else {
                ZVAL_FALSE(result);
            }
            zval_ptr_dtor_nogc(&op1);
            break;
        case ZEND_AST_OR:
            if (UNEXPECTED(zend_ast_evaluate_ex(&op1, ast->child[0], scope, &short_circuited, ctx) != SUCCESS)) {
                ret = FAILURE;
                break;
            }
            if (zend_is_true(&op1)) {
                ZVAL_TRUE(result);
            } else {
                if (UNEXPECTED(zend_ast_evaluate_ex(&op2, ast->child[1], scope, &short_circuited, ctx) != SUCCESS)) {
                    zval_ptr_dtor_nogc(&op1);
                    ret = FAILURE;
                    break;
                }
                ZVAL_BOOL(result, zend_is_true(&op2));
                zval_ptr_dtor_nogc(&op2);
            }
            zval_ptr_dtor_nogc(&op1);
            break;
        case ZEND_AST_CONDITIONAL:
            if (UNEXPECTED(zend_ast_evaluate_ex(&op1, ast->child[0], scope, &short_circuited, ctx) != SUCCESS)) {
                ret = FAILURE;
                break;
            }
            if (zend_is_true(&op1)) {
                if (!ast->child[1]) {
                    *result = op1;
                } else {
                    if (UNEXPECTED(zend_ast_evaluate_ex(result, ast->child[1], scope, &short_circuited, ctx) != SUCCESS)) {
                        zval_ptr_dtor_nogc(&op1);
                        ret = FAILURE;
                        break;
                    }
                    zval_ptr_dtor_nogc(&op1);
                }
            } else {
                if (UNEXPECTED(zend_ast_evaluate_ex(result, ast->child[2], scope, &short_circuited, ctx) != SUCCESS)) {
                    zval_ptr_dtor_nogc(&op1);
                    ret = FAILURE;
                    break;
                }
                zval_ptr_dtor_nogc(&op1);
            }
            break;
        case ZEND_AST_COALESCE:
            if (UNEXPECTED(zend_ast_evaluate_ex(&op1, ast->child[0], scope, &short_circuited, ctx) != SUCCESS)) {
                ret = FAILURE;
                break;
            }
            if (Z_TYPE(op1) > IS_NULL) {
                *result = op1;
            } else {
                if (UNEXPECTED(zend_ast_evaluate_ex(result, ast->child[1], scope, &short_circuited, ctx) != SUCCESS)) {
                    zval_ptr_dtor_nogc(&op1);
                    ret = FAILURE;
                    break;
                }
                zval_ptr_dtor_nogc(&op1);
            }
            break;
        case ZEND_AST_UNARY_PLUS:
            if (UNEXPECTED(zend_ast_evaluate_ex(&op2, ast->child[0], scope, &short_circuited, ctx) != SUCCESS)) {
                ret = FAILURE;
            } else {
                ZVAL_LONG(&op1, 0);
                ret = add_function(result, &op1, &op2);
                zval_ptr_dtor_nogc(&op2);
            }
            break;
        case ZEND_AST_UNARY_MINUS:
            if (UNEXPECTED(zend_ast_evaluate_ex(&op2, ast->child[0], scope, &short_circuited, ctx) != SUCCESS)) {
                ret = FAILURE;
            } else {
                ZVAL_LONG(&op1, -1);
                ret = mul_function(result, &op1, &op2);
                zval_ptr_dtor_nogc(&op2);
            }
            break;
        case ZEND_AST_ARRAY:
            {
                uint32_t i;
                zend_ast_list *list = zend_ast_get_list(ast);
 
                if (!list->children) {
                    ZVAL_EMPTY_ARRAY(result);
                    break;
                }
                array_init(result);
                for (i = 0; i < list->children; i++) {
                    zend_ast *elem = list->child[i];
                    if (elem->kind == ZEND_AST_UNPACK) {
                        if (UNEXPECTED(zend_ast_evaluate_ex(&op1, elem->child[0], scope, &short_circuited, ctx) != SUCCESS)) {
                            zval_ptr_dtor_nogc(result);
                            return FAILURE;
                        }
                        if (UNEXPECTED(zend_ast_add_unpacked_element(result, &op1) != SUCCESS)) {
                            zval_ptr_dtor_nogc(&op1);
                            zval_ptr_dtor_nogc(result);
                            return FAILURE;
                        }
                        zval_ptr_dtor_nogc(&op1);
                        continue;
                    }
                    if (elem->child[1]) {
                        if (UNEXPECTED(zend_ast_evaluate_ex(&op1, elem->child[1], scope, &short_circuited, ctx) != SUCCESS)) {
                            zval_ptr_dtor_nogc(result);
                            return FAILURE;
                        }
                    } else {
                        ZVAL_UNDEF(&op1);
                    }
                    if (UNEXPECTED(zend_ast_evaluate_ex(&op2, elem->child[0], scope, &short_circuited, ctx) != SUCCESS)) {
                        zval_ptr_dtor_nogc(&op1);
                        zval_ptr_dtor_nogc(result);
                        return FAILURE;
                    }
                    if (UNEXPECTED(zend_ast_add_array_element(result, &op1, &op2) != SUCCESS)) {
                        zval_ptr_dtor_nogc(&op1);
                        zval_ptr_dtor_nogc(&op2);
                        zval_ptr_dtor_nogc(result);
                        return FAILURE;
                    }
                }
            }
            break;
        case ZEND_AST_DIM:
            if (ast->child[1] == NULL) {
                zend_error_noreturn(E_COMPILE_ERROR, "Cannot use [] for reading");
            }
 
            if (UNEXPECTED(zend_ast_evaluate_ex(&op1, ast->child[0], scope, &short_circuited, ctx) != SUCCESS)) {
                ret = FAILURE;
                break;
            }
            if (short_circuited) {
                *short_circuited_ptr = true;
                ZVAL_NULL(result);
                return SUCCESS;
            }
 
            // DIM on objects is disallowed because it allows executing arbitrary expressions
            if (Z_TYPE(op1) == IS_OBJECT) {
                zval_ptr_dtor_nogc(&op1);
                zend_throw_error(NULL, "Cannot use [] on objects in constant expression");
                ret = FAILURE;
                break;
            }
 
            if (UNEXPECTED(zend_ast_evaluate_ex(&op2, ast->child[1], scope, &short_circuited, ctx) != SUCCESS)) {
                zval_ptr_dtor_nogc(&op1);
                ret = FAILURE;
                break;
            }
 
            zend_fetch_dimension_const(result, &op1, &op2, (ast->attr & ZEND_DIM_IS) ? BP_VAR_IS : BP_VAR_R);
 
            zval_ptr_dtor_nogc(&op1);
            zval_ptr_dtor_nogc(&op2);
            if (UNEXPECTED(EG(exception))) {
                return FAILURE;
            }
 
            break;
        case ZEND_AST_CONST_ENUM_INIT:
        {
            // Preloading will attempt to resolve constants but objects can't be stored in shm
            // Aborting here to store the const AST instead
            if (CG(in_compilation)) {
                return FAILURE;
            }
 
            zend_ast *class_name_ast = ast->child[0];
            zend_string *class_name = zend_ast_get_str(class_name_ast);
 
            zend_ast *case_name_ast = ast->child[1];
            zend_string *case_name = zend_ast_get_str(case_name_ast);
 
            zend_ast *case_value_ast = ast->child[2];
 
            zval case_value_zv;
            ZVAL_UNDEF(&case_value_zv);
            if (case_value_ast != NULL) {
                if (UNEXPECTED(zend_ast_evaluate_ex(&case_value_zv, case_value_ast, scope, &short_circuited, ctx) != SUCCESS)) {
                    return FAILURE;
                }
            }
 
            zend_class_entry *ce = zend_lookup_class(class_name);
            zend_enum_new(result, ce, case_name, case_value_ast != NULL ? &case_value_zv : NULL);
            zval_ptr_dtor_nogc(&case_value_zv);
            break;
        }
        case ZEND_AST_CLASS_CONST:
        {
            zend_string *class_name = zend_ast_get_str(ast->child[0]);
            if (UNEXPECTED(zend_ast_evaluate_ex(&op2, ast->child[1], scope, &short_circuited, ctx) != SUCCESS)) {
                return FAILURE;
            }
            if (UNEXPECTED(Z_TYPE(op2) != IS_STRING)) {
                zend_invalid_class_constant_type_error(Z_TYPE(op2));
                zval_ptr_dtor_nogc(&op2);
                return FAILURE;
            }
            zend_string *const_name = Z_STR(op2);
 
            zend_string *previous_filename;
            zend_long previous_lineno;
            if (scope) {
                previous_filename = EG(filename_override);
                previous_lineno = EG(lineno_override);
                EG(filename_override) = scope->info.user.filename;
                EG(lineno_override) = zend_ast_get_lineno(ast);
            }
            zval *zv = zend_get_class_constant_ex(class_name, const_name, scope, ast->attr);
            if (scope) {
                EG(filename_override) = previous_filename;
                EG(lineno_override) = previous_lineno;
            }
 
            if (UNEXPECTED(zv == NULL)) {
                ZVAL_UNDEF(result);
                zval_ptr_dtor_nogc(&op2);
                return FAILURE;
            }
            ZVAL_COPY_OR_DUP(result, zv);
            zval_ptr_dtor_nogc(&op2);
            break;
        }
        case ZEND_AST_NEW:
        {
            zend_class_entry *ce = zend_ast_fetch_class(ast->child[0], scope);
            if (!ce) {
                return FAILURE;
            }
 
            if (object_init_ex(result, ce) != SUCCESS) {
                return FAILURE;
            }
 
            /* Even if there is no constructor, the object can have cause side-effects in various ways (__toString(), __get(), __isset(), etc). */
            ctx->had_side_effects = true;
 
            zend_ast_list *args_ast = zend_ast_get_list(ast->child[1]);
            if (args_ast->attr) {
                /* Has named arguments. */
                HashTable *args = zend_new_array(args_ast->children);
                for (uint32_t i = 0; i < args_ast->children; i++) {
                    zend_ast *arg_ast = args_ast->child[i];
                    zend_string *name = NULL;
                    zval arg;
                    if (arg_ast->kind == ZEND_AST_NAMED_ARG) {
                        name = zend_ast_get_str(arg_ast->child[0]);
                        arg_ast = arg_ast->child[1];
                    }
                    if (zend_ast_evaluate_ex(&arg, arg_ast, scope, &short_circuited, ctx) == FAILURE) {
                        zend_array_destroy(args);
                        zval_ptr_dtor(result);
                        return FAILURE;
                    }
                    if (name) {
                        if (!zend_hash_add(args, name, &arg)) {
                            zend_throw_error(NULL,
                                "Named parameter $%s overwrites previous argument",
                                ZSTR_VAL(name));
                            zend_array_destroy(args);
                            zval_ptr_dtor(result);
                            return FAILURE;
                        }
                    } else {
                        zend_hash_next_index_insert(args, &arg);
                    }
                }
 
                zend_function *ctor = Z_OBJ_HT_P(result)->get_constructor(Z_OBJ_P(result));
                if (ctor) {
                    zend_call_known_function(
                        ctor, Z_OBJ_P(result), Z_OBJCE_P(result), NULL, 0, NULL, args);
                }
 
                zend_array_destroy(args);
            } else {
                ALLOCA_FLAG(use_heap)
                zval *args = do_alloca(sizeof(zval) * args_ast->children, use_heap);
                for (uint32_t i = 0; i < args_ast->children; i++) {
                    if (zend_ast_evaluate_ex(&args[i], args_ast->child[i], scope, &short_circuited, ctx) == FAILURE) {
                        for (uint32_t j = 0; j < i; j++) {
                            zval_ptr_dtor(&args[j]);
                        }
                        free_alloca(args, use_heap);
                        zval_ptr_dtor(result);
                        return FAILURE;
                    }
                }
 
                zend_function *ctor = Z_OBJ_HT_P(result)->get_constructor(Z_OBJ_P(result));
                if (ctor) {
                    zend_call_known_instance_method(
                        ctor, Z_OBJ_P(result), NULL, args_ast->children, args);
                }
 
                for (uint32_t i = 0; i < args_ast->children; i++) {
                    zval_ptr_dtor(&args[i]);
                }
                free_alloca(args, use_heap);
            }
 
            if (EG(exception)) {
                zend_object_store_ctor_failed(Z_OBJ_P(result));
                zval_ptr_dtor(result);
                return FAILURE;
            }
            return SUCCESS;
        }
        case ZEND_AST_PROP:
        case ZEND_AST_NULLSAFE_PROP:
        {
            if (UNEXPECTED(zend_ast_evaluate_ex(&op1, ast->child[0], scope, &short_circuited, ctx) != SUCCESS)) {
                return FAILURE;
            }
            if (short_circuited) {
                *short_circuited_ptr = true;
                ZVAL_NULL(result);
                return SUCCESS;
            }
            if (ast->kind == ZEND_AST_NULLSAFE_PROP && Z_TYPE(op1) == IS_NULL) {
                *short_circuited_ptr = true;
                ZVAL_NULL(result);
                return SUCCESS;
            }
 
            if (UNEXPECTED(zend_ast_evaluate_ex(&op2, ast->child[1], scope, &short_circuited, ctx) != SUCCESS)) {
                zval_ptr_dtor_nogc(&op1);
                return FAILURE;
            }
 
            if (!try_convert_to_string(&op2)) {
                zval_ptr_dtor_nogc(&op1);
                zval_ptr_dtor_nogc(&op2);
                return FAILURE;
            }
 
            if (Z_TYPE(op1) != IS_OBJECT) {
                zend_wrong_property_read(&op1, &op2);
 
                zval_ptr_dtor_nogc(&op1);
                zval_ptr_dtor_nogc(&op2);
 
                ZVAL_NULL(result);
                return SUCCESS;
            }
 
            zend_object *zobj = Z_OBJ(op1);
            if (!(zobj->ce->ce_flags & ZEND_ACC_ENUM)) {
                zend_throw_error(NULL, "Fetching properties on non-enums in constant expressions is not allowed");
                zval_ptr_dtor_nogc(&op1);
                zval_ptr_dtor_nogc(&op2);
                return FAILURE;
            }
 
            zend_string *name = Z_STR(op2);
            zval *property_result = zend_read_property_ex(scope, zobj, name, 0, result);
            if (EG(exception)) {
                zval_ptr_dtor_nogc(&op1);
                zval_ptr_dtor_nogc(&op2);
                return FAILURE;
            }
 
            if (result != property_result) {
                ZVAL_COPY(result, property_result);
            }
            zval_ptr_dtor_nogc(&op1);
            zval_ptr_dtor_nogc(&op2);
            return SUCCESS;
        }
        default:
            zend_throw_error(NULL, "Unsupported constant expression");
            ret = FAILURE;
    }
    return ret;
}
 
ZEND_API zend_result ZEND_FASTCALL zend_ast_evaluate(zval *result, zend_ast *ast, zend_class_entry *scope)
{
    zend_ast_evaluate_ctx ctx = {0};
    bool short_circuited;
    return zend_ast_evaluate_ex(result, ast, scope, &short_circuited, &ctx);
}
 
static size_t ZEND_FASTCALL zend_ast_tree_size(zend_ast *ast)
{
    size_t size;
 
    if (ast->kind == ZEND_AST_ZVAL || ast->kind == ZEND_AST_CONSTANT) {
        size = sizeof(zend_ast_zval);
    } else if (zend_ast_is_list(ast)) {
        uint32_t i;
        zend_ast_list *list = zend_ast_get_list(ast);
 
        size = zend_ast_list_size(list->children);
        for (i = 0; i < list->children; i++) {
            if (list->child[i]) {
                size += zend_ast_tree_size(list->child[i]);
            }
        }
    } else {
        uint32_t i, children = zend_ast_get_num_children(ast);
 
        size = zend_ast_size(children);
        for (i = 0; i < children; i++) {
            if (ast->child[i]) {
                size += zend_ast_tree_size(ast->child[i]);
            }
        }
    }
    return size;
}
 
static void* ZEND_FASTCALL zend_ast_tree_copy(zend_ast *ast, void *buf)
{
    if (ast->kind == ZEND_AST_ZVAL) {
        zend_ast_zval *new = (zend_ast_zval*)buf;
        new->kind = ZEND_AST_ZVAL;
        new->attr = ast->attr;
        ZVAL_COPY(&new->val, zend_ast_get_zval(ast));
        Z_LINENO(new->val) = zend_ast_get_lineno(ast);
        buf = (void*)((char*)buf + sizeof(zend_ast_zval));
    } else if (ast->kind == ZEND_AST_CONSTANT) {
        zend_ast_zval *new = (zend_ast_zval*)buf;
        new->kind = ZEND_AST_CONSTANT;
        new->attr = ast->attr;
        ZVAL_STR_COPY(&new->val, zend_ast_get_constant_name(ast));
        Z_LINENO(new->val) = zend_ast_get_lineno(ast);
        buf = (void*)((char*)buf + sizeof(zend_ast_zval));
    } else if (zend_ast_is_list(ast)) {
        zend_ast_list *list = zend_ast_get_list(ast);
        zend_ast_list *new = (zend_ast_list*)buf;
        uint32_t i;
        new->kind = list->kind;
        new->attr = list->attr;
        new->children = list->children;
        new->lineno = list->lineno;
        buf = (void*)((char*)buf + zend_ast_list_size(list->children));
        for (i = 0; i < list->children; i++) {
            if (list->child[i]) {
                new->child[i] = (zend_ast*)buf;
                buf = zend_ast_tree_copy(list->child[i], buf);
            } else {
                new->child[i] = NULL;
            }
        }
    } else {
        uint32_t i, children = zend_ast_get_num_children(ast);
        zend_ast *new = (zend_ast*)buf;
        new->kind = ast->kind;
        new->attr = ast->attr;
        new->lineno = ast->lineno;
        buf = (void*)((char*)buf + zend_ast_size(children));
        for (i = 0; i < children; i++) {
            if (ast->child[i]) {
                new->child[i] = (zend_ast*)buf;
                buf = zend_ast_tree_copy(ast->child[i], buf);
            } else {
                new->child[i] = NULL;
            }
        }
    }
    return buf;
}
 
ZEND_API zend_ast_ref * ZEND_FASTCALL zend_ast_copy(zend_ast *ast)
{
    size_t tree_size;
    zend_ast_ref *ref;
 
    ZEND_ASSERT(ast != NULL);
    tree_size = zend_ast_tree_size(ast) + sizeof(zend_ast_ref);
    ref = emalloc(tree_size);
    zend_ast_tree_copy(ast, GC_AST(ref));
    GC_SET_REFCOUNT(ref, 1);
    GC_TYPE_INFO(ref) = GC_CONSTANT_AST;
    return ref;
}
 
ZEND_API void ZEND_FASTCALL zend_ast_destroy(zend_ast *ast)
{
tail_call:
    if (!ast) {
        return;
    }
 
    if (EXPECTED(ast->kind >= ZEND_AST_VAR)) {
        uint32_t i, children = zend_ast_get_num_children(ast);
 
        for (i = 1; i < children; i++) {
            zend_ast_destroy(ast->child[i]);
        }
        ast = ast->child[0];
        goto tail_call;
    } else if (EXPECTED(ast->kind == ZEND_AST_ZVAL)) {
        zval_ptr_dtor_nogc(zend_ast_get_zval(ast));
    } else if (EXPECTED(zend_ast_is_list(ast))) {
        zend_ast_list *list = zend_ast_get_list(ast);
        if (list->children) {
            uint32_t i;
 
            for (i = 1; i < list->children; i++) {
                zend_ast_destroy(list->child[i]);
            }
            ast = list->child[0];
            goto tail_call;
        }
    } else if (EXPECTED(ast->kind == ZEND_AST_CONSTANT)) {
        zend_string_release_ex(zend_ast_get_constant_name(ast), 0);
    } else if (EXPECTED(ast->kind >= ZEND_AST_FUNC_DECL)) {
        zend_ast_decl *decl = (zend_ast_decl *) ast;
 
        if (decl->name) {
            zend_string_release_ex(decl->name, 0);
        }
        if (decl->doc_comment) {
            zend_string_release_ex(decl->doc_comment, 0);
        }
        zend_ast_destroy(decl->child[0]);
        zend_ast_destroy(decl->child[1]);
        zend_ast_destroy(decl->child[2]);
        zend_ast_destroy(decl->child[3]);
        ast = decl->child[4];
        goto tail_call;
    }
}
 
ZEND_API void ZEND_FASTCALL zend_ast_ref_destroy(zend_ast_ref *ast)
{
    zend_ast_destroy(GC_AST(ast));
    efree(ast);
}
 
ZEND_API void zend_ast_apply(zend_ast *ast, zend_ast_apply_func fn, void *context) {
    if (zend_ast_is_list(ast)) {
        zend_ast_list *list = zend_ast_get_list(ast);
        uint32_t i;
        for (i = 0; i < list->children; ++i) {
            fn(&list->child[i], context);
        }
    } else {
        uint32_t i, children = zend_ast_get_num_children(ast);
        for (i = 0; i < children; ++i) {
            fn(&ast->child[i], context);
        }
    }
}
 
/*
 * Operator Precedence
 * ====================
 * priority  associativity  operators
 * ----------------------------------
 *   10     left            include, include_once, eval, require, require_once
 *   20     left            ,
 *   30     left            or
 *   40     left            xor
 *   50     left            and
 *   60     right           print
 *   70     right           yield
 *   80     right           =>
 *   85     right           yield from
 *   90     right           = += -= *= /= .= %= &= |= ^= <<= >>= **=
 *  100     left            ? :
 *  110     right           ??
 *  120     left            ||
 *  130     left            &&
 *  140     left            |
 *  150     left            ^
 *  160     left            &
 *  170     non-associative == != === !==
 *  180     non-associative < <= > >= <=>
 *  185     left            .
 *  190     left            << >>
 *  200     left            + -
 *  210     left            * / %
 *  220     right           !
 *  230     non-associative instanceof
 *  240     right           + - ++ -- ~ (type) @
 *  250     right           **
 *  260     left            [
 *  270     non-associative clone new
 */
 
static ZEND_COLD void zend_ast_export_ex(smart_str *str, zend_ast *ast, int priority, int indent);
 
static ZEND_COLD void zend_ast_export_str(smart_str *str, zend_string *s)
{
    size_t i;
 
    for (i = 0; i < ZSTR_LEN(s); i++) {
        unsigned char c = ZSTR_VAL(s)[i];
        if (c == '\'' || c == '\\') {
            smart_str_appendc(str, '\\');
            smart_str_appendc(str, c);
        } else {
            smart_str_appendc(str, c);
        }
    }
}
 
static ZEND_COLD void zend_ast_export_qstr(smart_str *str, char quote, zend_string *s)
{
    size_t i;
 
    for (i = 0; i < ZSTR_LEN(s); i++) {
        unsigned char c = ZSTR_VAL(s)[i];
        if (c < ' ') {
            switch (c) {
                case '\n':
                    smart_str_appends(str, "\\n");
                    break;
                case '\r':
                    smart_str_appends(str, "\\r");
                    break;
                case '\t':
                    smart_str_appends(str, "\\t");
                    break;
                case '\f':
                    smart_str_appends(str, "\\f");
                    break;
                case '\v':
                    smart_str_appends(str, "\\v");
                    break;
#ifdef ZEND_WIN32
                case VK_ESCAPE:
#else
                case '\e':
#endif
                    smart_str_appends(str, "\\e");
                    break;
                default:
                    smart_str_appends(str, "\\0");
                    smart_str_appendc(str, '0' + (c / 8));
                    smart_str_appendc(str, '0' + (c % 8));
                    break;
            }
        } else {
            if (c == quote || c == '$' || c == '\\') {
                smart_str_appendc(str, '\\');
            }
            smart_str_appendc(str, c);
        }
    }
}
 
static ZEND_COLD void zend_ast_export_indent(smart_str *str, int indent)
{
    while (indent > 0) {
        smart_str_appends(str, "    ");
        indent--;
    }
}
 
static ZEND_COLD void zend_ast_export_name(smart_str *str, zend_ast *ast, int priority, int indent)
{
    if (ast->kind == ZEND_AST_ZVAL) {
        zval *zv = zend_ast_get_zval(ast);
 
        if (Z_TYPE_P(zv) == IS_STRING) {
            smart_str_append(str, Z_STR_P(zv));
            return;
        }
    }
    zend_ast_export_ex(str, ast, priority, indent);
}
 
static ZEND_COLD void zend_ast_export_ns_name(smart_str *str, zend_ast *ast, int priority, int indent)
{
    if (ast->kind == ZEND_AST_ZVAL) {
        zval *zv = zend_ast_get_zval(ast);
 
        if (Z_TYPE_P(zv) == IS_STRING) {
            if (ast->attr == ZEND_NAME_FQ) {
                smart_str_appendc(str, '\\');
            } else if (ast->attr == ZEND_NAME_RELATIVE) {
                smart_str_appends(str, "namespace\\");
            }
            smart_str_append(str, Z_STR_P(zv));
            return;
        }
    }
    zend_ast_export_ex(str, ast, priority, indent);
}
 
static ZEND_COLD bool zend_ast_valid_var_char(char ch)
{
    unsigned char c = (unsigned char)ch;
 
    if (c != '_' && c < 127 &&
        (c < '0' || c > '9') &&
        (c < 'A' || c > 'Z') &&
        (c < 'a' || c > 'z')) {
        return 0;
    }
    return 1;
}
 
static ZEND_COLD bool zend_ast_valid_var_name(const char *s, size_t len)
{
    unsigned char c;
    size_t i;
 
    if (len == 0) {
        return 0;
    }
    c = (unsigned char)s[0];
    if (c != '_' && c < 127 &&
        (c < 'A' || c > 'Z') &&
        (c < 'a' || c > 'z')) {
        return 0;
    }
    for (i = 1; i < len; i++) {
        c = (unsigned char)s[i];
        if (c != '_' && c < 127 &&
            (c < '0' || c > '9') &&
            (c < 'A' || c > 'Z') &&
            (c < 'a' || c > 'z')) {
            return 0;
        }
    }
    return 1;
}
 
static ZEND_COLD bool zend_ast_var_needs_braces(char ch)
{
    return ch == '[' || zend_ast_valid_var_char(ch);
}
 
static ZEND_COLD void zend_ast_export_var(smart_str *str, zend_ast *ast, int priority, int indent)
{
    if (ast->kind == ZEND_AST_ZVAL) {
        zval *zv = zend_ast_get_zval(ast);
        if (Z_TYPE_P(zv) == IS_STRING &&
            zend_ast_valid_var_name(Z_STRVAL_P(zv), Z_STRLEN_P(zv))) {
            smart_str_append(str, Z_STR_P(zv));
            return;
        }
    } else if (ast->kind == ZEND_AST_VAR) {
        zend_ast_export_ex(str, ast, 0, indent);
        return;
    }
    smart_str_appendc(str, '{');
    zend_ast_export_name(str, ast, 0, indent);
    smart_str_appendc(str, '}');
}
 
static ZEND_COLD void zend_ast_export_list(smart_str *str, zend_ast_list *list, bool separator, int priority, int indent)
{
    uint32_t i = 0;
 
    while (i < list->children) {
        if (i != 0 && separator) {
            smart_str_appends(str, ", ");
        }
        zend_ast_export_ex(str, list->child[i], priority, indent);
        i++;
    }
}
 
static ZEND_COLD void zend_ast_export_encaps_list(smart_str *str, char quote, zend_ast_list *list, int indent)
{
    uint32_t i = 0;
    zend_ast *ast;
 
    while (i < list->children) {
        ast = list->child[i];
        if (ast->kind == ZEND_AST_ZVAL) {
            zval *zv = zend_ast_get_zval(ast);
 
            ZEND_ASSERT(Z_TYPE_P(zv) == IS_STRING);
            zend_ast_export_qstr(str, quote, Z_STR_P(zv));
        } else if (ast->kind == ZEND_AST_VAR &&
                   ast->child[0]->kind == ZEND_AST_ZVAL &&
                   (i + 1 == list->children ||
                    list->child[i + 1]->kind != ZEND_AST_ZVAL ||
                    !zend_ast_var_needs_braces(
                        *Z_STRVAL_P(
                            zend_ast_get_zval(list->child[i + 1]))))) {
            zend_ast_export_ex(str, ast, 0, indent);
        } else {
            smart_str_appendc(str, '{');
            zend_ast_export_ex(str, ast, 0, indent);
            smart_str_appendc(str, '}');
        }
        i++;
    }
}
 
static ZEND_COLD void zend_ast_export_name_list_ex(smart_str *str, zend_ast_list *list, int indent, const char *separator)
{
    uint32_t i = 0;
 
    while (i < list->children) {
        if (i != 0) {
            smart_str_appends(str, separator);
        }
        zend_ast_export_name(str, list->child[i], 0, indent);
        i++;
    }
}
 
#define zend_ast_export_name_list(s, l, i) zend_ast_export_name_list_ex(s, l, i, ", ")
#define zend_ast_export_catch_name_list(s, l, i) zend_ast_export_name_list_ex(s, l, i, "|")
 
static ZEND_COLD void zend_ast_export_var_list(smart_str *str, zend_ast_list *list, int indent)
{
    uint32_t i = 0;
 
    while (i < list->children) {
        if (i != 0) {
            smart_str_appends(str, ", ");
        }
        if (list->child[i]->attr & ZEND_BIND_REF) {
            smart_str_appendc(str, '&');
        }
        smart_str_appendc(str, '$');
        zend_ast_export_name(str, list->child[i], 20, indent);
        i++;
    }
}
 
static ZEND_COLD void zend_ast_export_stmt(smart_str *str, zend_ast *ast, int indent)
{
    if (!ast) {
        return;
    }
 
    if (ast->kind == ZEND_AST_STMT_LIST ||
        ast->kind == ZEND_AST_TRAIT_ADAPTATIONS) {
        zend_ast_list *list = (zend_ast_list*)ast;
        uint32_t i = 0;
 
        while (i < list->children) {
            ast = list->child[i];
            zend_ast_export_stmt(str, ast, indent);
            i++;
        }
    } else {
        zend_ast_export_indent(str, indent);
        zend_ast_export_ex(str, ast, 0, indent);
        switch (ast->kind) {
            case ZEND_AST_LABEL:
            case ZEND_AST_IF:
            case ZEND_AST_SWITCH:
            case ZEND_AST_WHILE:
            case ZEND_AST_TRY:
            case ZEND_AST_FOR:
            case ZEND_AST_FOREACH:
            case ZEND_AST_FUNC_DECL:
            case ZEND_AST_METHOD:
            case ZEND_AST_CLASS:
            case ZEND_AST_USE_TRAIT:
            case ZEND_AST_NAMESPACE:
            case ZEND_AST_DECLARE:
                break;
            case ZEND_AST_PROP_GROUP: {
                zend_ast *first_prop = zend_ast_get_list(ast->child[1])->child[0];
                zend_ast *hook_list = first_prop->child[3];
                if (hook_list == NULL) {
                    smart_str_appendc(str, ';');
                }
                break;
            }
            default:
                smart_str_appendc(str, ';');
                break;
        }
        smart_str_appendc(str, '\n');
    }
}
 
static ZEND_COLD void zend_ast_export_if_stmt(smart_str *str, zend_ast_list *list, int indent)
{
    uint32_t i;
    zend_ast *ast;
 
tail_call:
    i = 0;
    while (i < list->children) {
        ast = list->child[i];
        ZEND_ASSERT(ast->kind == ZEND_AST_IF_ELEM);
        if (ast->child[0]) {
            if (i == 0) {
                smart_str_appends(str, "if (");
            } else {
                zend_ast_export_indent(str, indent);
                smart_str_appends(str, "} elseif (");
            }
            zend_ast_export_ex(str, ast->child[0], 0, indent);
            smart_str_appends(str, ") {\n");
            zend_ast_export_stmt(str, ast->child[1], indent + 1);
        } else {
            zend_ast_export_indent(str, indent);
            smart_str_appends(str, "} else ");
            if (ast->child[1] && ast->child[1]->kind == ZEND_AST_IF) {
                list = (zend_ast_list*)ast->child[1];
                goto tail_call;
            } else {
                smart_str_appends(str, "{\n");
                zend_ast_export_stmt(str, ast->child[1], indent + 1);
            }
        }
        i++;
    }
    zend_ast_export_indent(str, indent);
    smart_str_appendc(str, '}');
}
 
static ZEND_COLD void zend_ast_export_zval(smart_str *str, zval *zv, int priority, int indent)
{
    ZVAL_DEREF(zv);
    switch (Z_TYPE_P(zv)) {
        case IS_NULL:
            smart_str_appends(str, "null");
            break;
        case IS_FALSE:
            smart_str_appends(str, "false");
            break;
        case IS_TRUE:
            smart_str_appends(str, "true");
            break;
        case IS_LONG:
            smart_str_append_long(str, Z_LVAL_P(zv));
            break;
        case IS_DOUBLE:
            smart_str_append_double(
                str, Z_DVAL_P(zv), (int) EG(precision), /* zero_fraction */ false);
            break;
        case IS_STRING:
            smart_str_appendc(str, '\'');
            zend_ast_export_str(str, Z_STR_P(zv));
            smart_str_appendc(str, '\'');
            break;
        case IS_ARRAY: {
            zend_long idx;
            zend_string *key;
            zval *val;
            bool first = true;
            smart_str_appendc(str, '[');
            ZEND_HASH_FOREACH_KEY_VAL(Z_ARRVAL_P(zv), idx, key, val) {
                if (first) {
                    first = false;
                } else {
                    smart_str_appends(str, ", ");
                }
                if (key) {
                    smart_str_appendc(str, '\'');
                    zend_ast_export_str(str, key);
                    smart_str_appends(str, "' => ");
                } else {
                    smart_str_append_long(str, idx);
                    smart_str_appends(str, " => ");
                }
                zend_ast_export_zval(str, val, 0, indent);
            } ZEND_HASH_FOREACH_END();
            smart_str_appendc(str, ']');
            break;
        }
        case IS_CONSTANT_AST:
            zend_ast_export_ex(str, Z_ASTVAL_P(zv), priority, indent);
            break;
        EMPTY_SWITCH_DEFAULT_CASE();
    }
}
 
static ZEND_COLD void zend_ast_export_class_no_header(smart_str *str, zend_ast_decl *decl, int indent) {
    if (decl->child[0]) {
        smart_str_appends(str, " extends ");
        zend_ast_export_ns_name(str, decl->child[0], 0, indent);
    }
    if (decl->child[1]) {
        smart_str_appends(str, " implements ");
        zend_ast_export_ex(str, decl->child[1], 0, indent);
    }
    smart_str_appends(str, " {\n");
    zend_ast_export_stmt(str, decl->child[2], indent + 1);
    zend_ast_export_indent(str, indent);
    smart_str_appends(str, "}");
}
 
static ZEND_COLD void zend_ast_export_attribute_group(smart_str *str, zend_ast *ast, int indent) {
    zend_ast_list *list = zend_ast_get_list(ast);
    for (uint32_t i = 0; i < list->children; i++) {
        zend_ast *attr = list->child[i];
 
        if (i) {
            smart_str_appends(str, ", ");
        }
        zend_ast_export_ns_name(str, attr->child[0], 0, indent);
 
        if (attr->child[1]) {
            smart_str_appendc(str, '(');
            zend_ast_export_ex(str, attr->child[1], 0, indent);
            smart_str_appendc(str, ')');
        }
    }
}
 
static ZEND_COLD void zend_ast_export_attributes(smart_str *str, zend_ast *ast, int indent, bool newlines) {
    zend_ast_list *list = zend_ast_get_list(ast);
    uint32_t i;
 
    for (i = 0; i < list->children; i++) {
        smart_str_appends(str, "#[");
        zend_ast_export_attribute_group(str, list->child[i], indent);
        smart_str_appends(str, "]");
 
        if (newlines) {
            smart_str_appendc(str, '\n');
            zend_ast_export_indent(str, indent);
        } else {
            smart_str_appendc(str, ' ');
        }
    }
}
 
static ZEND_COLD void zend_ast_export_visibility(smart_str *str, uint32_t flags, zend_modifier_target target) {
    if (flags & ZEND_ACC_PUBLIC) {
        smart_str_appends(str, "public ");
    } else if (flags & ZEND_ACC_PROTECTED) {
        smart_str_appends(str, "protected ");
    } else if (flags & ZEND_ACC_PRIVATE) {
        smart_str_appends(str, "private ");
    }
 
    if (target == ZEND_MODIFIER_TARGET_PROPERTY || target == ZEND_MODIFIER_TARGET_CPP) {
        if (flags & ZEND_ACC_PRIVATE_SET) {
            smart_str_appends(str, "private(set) ");
        } else if (flags & ZEND_ACC_PROTECTED_SET) {
            smart_str_appends(str, "protected(set) ");
        } else if (flags & ZEND_ACC_PUBLIC_SET) {
            smart_str_appends(str, "public(set) ");
        }
    }
}
 
static ZEND_COLD void zend_ast_export_type(smart_str *str, zend_ast *ast, int indent) {
    if (ast->kind == ZEND_AST_TYPE_UNION) {
        zend_ast_list *list = zend_ast_get_list(ast);
        for (uint32_t i = 0; i < list->children; i++) {
            if (i != 0) {
                smart_str_appendc(str, '|');
            }
            zend_ast_export_type(str, list->child[i], indent);
        }
        return;
    }
    if (ast->kind == ZEND_AST_TYPE_INTERSECTION) {
        zend_ast_list *list = zend_ast_get_list(ast);
        for (uint32_t i = 0; i < list->children; i++) {
            if (i != 0) {
                smart_str_appendc(str, '&');
            }
            zend_ast_export_type(str, list->child[i], indent);
        }
        return;
    }
    if (ast->attr & ZEND_TYPE_NULLABLE) {
        smart_str_appendc(str, '?');
    }
    zend_ast_export_ns_name(str, ast, 0, indent);
}
 
static ZEND_COLD void zend_ast_export_hook_list(smart_str *str, zend_ast_list *hook_list, int indent)
{
    smart_str_appends(str, " {");
    smart_str_appendc(str, '\n');
    indent++;
    zend_ast_export_indent(str, indent);
 
    for (uint32_t i = 0; i < hook_list->children; i++) {
        zend_ast_decl *hook = (zend_ast_decl *)hook_list->child[i];
        zend_ast_export_visibility(str, hook->flags, ZEND_MODIFIER_TARGET_PROPERTY);
        if (hook->flags & ZEND_ACC_FINAL) {
            smart_str_appends(str, "final ");
        }
        smart_str_append(str, hook->name);
        zend_ast *body = hook->child[2];
        if (body == NULL) {
            smart_str_appendc(str, ';');
        } else if (body->kind == ZEND_AST_PROPERTY_HOOK_SHORT_BODY) {
            smart_str_appends(str, " => ");
            zend_ast_export_ex(str, body->child[0], 0, indent);
            smart_str_appendc(str, ';');
        } else {
            smart_str_appends(str, " {\n");
            zend_ast_export_stmt(str, body, indent + 1);
            zend_ast_export_indent(str, indent);
            smart_str_appendc(str, '}');
        }
        if (i < (hook_list->children - 1)) {
            smart_str_appendc(str, '\n');
            zend_ast_export_indent(str, indent);
        }
    }
    smart_str_appendc(str, '\n');
    indent--;
    zend_ast_export_indent(str, indent);
    smart_str_appendc(str, '}');
}
 
#define BINARY_OP(_op, _p, _pl, _pr) do { \
        op = _op; \
        p = _p; \
        pl = _pl; \
        pr = _pr; \
        goto binary_op; \
    } while (0)
 
#define PREFIX_OP(_op, _p, _pl) do { \
        op = _op; \
        p = _p; \
        pl = _pl; \
        goto prefix_op; \
    } while (0)
 
#define FUNC_OP(_op) do { \
        op = _op; \
        goto func_op; \
    } while (0)
 
#define POSTFIX_OP(_op, _p, _pl) do { \
        op = _op; \
        p = _p; \
        pl = _pl; \
        goto postfix_op; \
    } while (0)
 
#define APPEND_NODE_1(_op) do { \
        op = _op; \
        goto append_node_1; \
    } while (0)
 
#define APPEND_STR(_op) do { \
        op = _op; \
        goto append_str; \
    } while (0)
 
#define APPEND_DEFAULT_VALUE(n) do { \
        p = n; \
        goto append_default_value; \
    } while (0)
 
static ZEND_COLD void zend_ast_export_ex(smart_str *str, zend_ast *ast, int priority, int indent)
{
    zend_ast_decl *decl;
    int p, pl, pr;
    const char *op;
 
tail_call:
    if (!ast) {
        return;
    }
    switch (ast->kind) {
        /* special nodes */
        case ZEND_AST_ZVAL:
            zend_ast_export_zval(str, zend_ast_get_zval(ast), priority, indent);
            break;
        case ZEND_AST_CONSTANT: {
            zend_string *name = zend_ast_get_constant_name(ast);
            smart_str_appendl(str, ZSTR_VAL(name), ZSTR_LEN(name));
            break;
        }
        case ZEND_AST_CONSTANT_CLASS:
            smart_str_appendl(str, "__CLASS__", sizeof("__CLASS__")-1);
            break;
        case ZEND_AST_ZNODE:
            /* This AST kind is only used for temporary nodes during compilation */
            ZEND_UNREACHABLE();
            break;
 
        /* declaration nodes */
        case ZEND_AST_FUNC_DECL:
        case ZEND_AST_CLOSURE:
        case ZEND_AST_ARROW_FUNC:
        case ZEND_AST_METHOD:
            decl = (zend_ast_decl *) ast;
            if (decl->child[4]) {
                bool newlines = !(ast->kind == ZEND_AST_CLOSURE || ast->kind == ZEND_AST_ARROW_FUNC);
                zend_ast_export_attributes(str, decl->child[4], indent, newlines);
            }
 
            zend_ast_export_visibility(str, decl->flags, ZEND_MODIFIER_TARGET_METHOD);
 
            if (decl->flags & ZEND_ACC_STATIC) {
                smart_str_appends(str, "static ");
            }
            if (decl->flags & ZEND_ACC_ABSTRACT) {
                smart_str_appends(str, "abstract ");
            }
            if (decl->flags & ZEND_ACC_FINAL) {
                smart_str_appends(str, "final ");
            }
            if (decl->kind == ZEND_AST_ARROW_FUNC) {
                smart_str_appends(str, "fn");
            } else {
                smart_str_appends(str, "function ");
            }
            if (decl->flags & ZEND_ACC_RETURN_REFERENCE) {
                smart_str_appendc(str, '&');
            }
            if (ast->kind != ZEND_AST_CLOSURE && ast->kind != ZEND_AST_ARROW_FUNC) {
                smart_str_appendl(str, ZSTR_VAL(decl->name), ZSTR_LEN(decl->name));
            }
            smart_str_appendc(str, '(');
            zend_ast_export_ex(str, decl->child[0], 0, indent);
            smart_str_appendc(str, ')');
            zend_ast_export_ex(str, decl->child[1], 0, indent);
            if (decl->child[3]) {
                smart_str_appends(str, ": ");
                zend_ast_export_type(str, decl->child[3], indent);
            }
            if (decl->child[2]) {
                if (decl->kind == ZEND_AST_ARROW_FUNC) {
                    zend_ast *body = decl->child[2];
                    if (body->kind == ZEND_AST_RETURN) {
                        body = body->child[0];
                    }
                    smart_str_appends(str, " => ");
                    zend_ast_export_ex(str, body, 0, indent);
                    break;
                }
 
                smart_str_appends(str, " {\n");
                zend_ast_export_stmt(str, decl->child[2], indent + 1);
                zend_ast_export_indent(str, indent);
                smart_str_appendc(str, '}');
                if (ast->kind != ZEND_AST_CLOSURE) {
                    smart_str_appendc(str, '\n');
                }
            } else {
                smart_str_appends(str, ";\n");
            }
            break;
        case ZEND_AST_CLASS:
            decl = (zend_ast_decl *) ast;
            if (decl->child[3]) {
                zend_ast_export_attributes(str, decl->child[3], indent, 1);
            }
            if (decl->flags & ZEND_ACC_INTERFACE) {
                smart_str_appends(str, "interface ");
            } else if (decl->flags & ZEND_ACC_TRAIT) {
                smart_str_appends(str, "trait ");
            } else if (decl->flags & ZEND_ACC_ENUM) {
                smart_str_appends(str, "enum ");
            } else {
                if (decl->flags & ZEND_ACC_EXPLICIT_ABSTRACT_CLASS) {
                    smart_str_appends(str, "abstract ");
                }
                if (decl->flags & ZEND_ACC_FINAL) {
                    smart_str_appends(str, "final ");
                }
                if (decl->flags & ZEND_ACC_READONLY_CLASS) {
                    smart_str_appends(str, "readonly ");
                }
                smart_str_appends(str, "class ");
            }
            smart_str_appendl(str, ZSTR_VAL(decl->name), ZSTR_LEN(decl->name));
            if (decl->flags & ZEND_ACC_ENUM && decl->child[4]) {
                smart_str_appends(str, ": ");
                zend_ast_export_type(str, decl->child[4], indent);
            }
            zend_ast_export_class_no_header(str, decl, indent);
            smart_str_appendc(str, '\n');
            break;
 
        /* list nodes */
        case ZEND_AST_ARG_LIST:
        case ZEND_AST_EXPR_LIST:
        case ZEND_AST_PARAM_LIST:
simple_list:
            zend_ast_export_list(str, (zend_ast_list*)ast, 1, 20, indent);
            break;
        case ZEND_AST_ARRAY:
            smart_str_appendc(str, '[');
            zend_ast_export_list(str, (zend_ast_list*)ast, 1, 20, indent);
            smart_str_appendc(str, ']');
            break;
        case ZEND_AST_ENCAPS_LIST:
            smart_str_appendc(str, '"');
            zend_ast_export_encaps_list(str, '"', (zend_ast_list*)ast, indent);
            smart_str_appendc(str, '"');
            break;
        case ZEND_AST_STMT_LIST:
        case ZEND_AST_TRAIT_ADAPTATIONS:
            zend_ast_export_stmt(str, ast, indent);
            break;
        case ZEND_AST_IF:
            zend_ast_export_if_stmt(str, (zend_ast_list*)ast, indent);
            break;
        case ZEND_AST_SWITCH_LIST:
        case ZEND_AST_CATCH_LIST:
        case ZEND_AST_MATCH_ARM_LIST:
            zend_ast_export_list(str, (zend_ast_list*)ast, 0, 0, indent);
            break;
        case ZEND_AST_CLOSURE_USES:
            smart_str_appends(str, " use(");
            zend_ast_export_var_list(str, (zend_ast_list*)ast, indent);
            smart_str_appendc(str, ')');
            break;
        case ZEND_AST_PROP_GROUP: {
            zend_ast *type_ast = ast->child[0];
            zend_ast *prop_ast = ast->child[1];
 
            if (ast->child[2]) {
                zend_ast_export_attributes(str, ast->child[2], indent, 1);
            }
 
            zend_ast_export_visibility(str, ast->attr, ZEND_MODIFIER_TARGET_PROPERTY);
 
            if (ast->attr & ZEND_ACC_STATIC) {
                smart_str_appends(str, "static ");
            }
            if (ast->attr & ZEND_ACC_READONLY) {
                smart_str_appends(str, "readonly ");
            }
 
            if (type_ast) {
                zend_ast_export_type(str, type_ast, indent);
                smart_str_appendc(str, ' ');
            }
 
            ast = prop_ast;
            goto simple_list;
        }
 
        case ZEND_AST_CONST_DECL:
            smart_str_appends(str, "const ");
            goto simple_list;
        case ZEND_AST_CLASS_CONST_GROUP:
            if (ast->child[1]) {
                zend_ast_export_attributes(str, ast->child[1], indent, 1);
            }
 
            zend_ast_export_visibility(str, ast->attr, ZEND_MODIFIER_TARGET_CONSTANT);
            smart_str_appends(str, "const ");
            if (ast->child[2]) {
                zend_ast_export_type(str, ast->child[2], indent);
                smart_str_appendc(str, ' ');
            }
 
            ast = ast->child[0];
 
            goto simple_list;
        case ZEND_AST_NAME_LIST:
            zend_ast_export_name_list(str, (zend_ast_list*)ast, indent);
            break;
        case ZEND_AST_USE:
            smart_str_appends(str, "use ");
            if (ast->attr == T_FUNCTION) {
                smart_str_appends(str, "function ");
            } else if (ast->attr == T_CONST) {
                smart_str_appends(str, "const ");
            }
            goto simple_list;
 
        /* 0 child nodes */
        case ZEND_AST_MAGIC_CONST:
            switch (ast->attr) {
                case T_LINE:     APPEND_STR("__LINE__");
                case T_FILE:     APPEND_STR("__FILE__");
                case T_DIR:      APPEND_STR("__DIR__");
                case T_TRAIT_C:  APPEND_STR("__TRAIT__");
                case T_METHOD_C: APPEND_STR("__METHOD__");
                case T_FUNC_C:   APPEND_STR("__FUNCTION__");
                case T_PROPERTY_C: APPEND_STR("__PROPERTY__");
                case T_NS_C:     APPEND_STR("__NAMESPACE__");
                case T_CLASS_C:  APPEND_STR("__CLASS__");
                EMPTY_SWITCH_DEFAULT_CASE();
            }
            break;
        case ZEND_AST_TYPE:
            switch (ast->attr & ~ZEND_TYPE_NULLABLE) {
                case IS_ARRAY:    APPEND_STR("array");
                case IS_CALLABLE: APPEND_STR("callable");
                case IS_STATIC:   APPEND_STR("static");
                case IS_MIXED:    APPEND_STR("mixed");
                EMPTY_SWITCH_DEFAULT_CASE();
            }
            break;
 
        /* 1 child node */
        case ZEND_AST_VAR:
            smart_str_appendc(str, '$');
            zend_ast_export_var(str, ast->child[0], 0, indent);
            break;
        case ZEND_AST_CONST:
            zend_ast_export_ns_name(str, ast->child[0], 0, indent);
            break;
        case ZEND_AST_UNPACK:
            smart_str_appends(str, "...");
            ast = ast->child[0];
            goto tail_call;
        case ZEND_AST_UNARY_PLUS:  PREFIX_OP("+", 240, 241);
        case ZEND_AST_UNARY_MINUS: PREFIX_OP("-", 240, 241);
        case ZEND_AST_CAST:
            switch (ast->attr) {
                case IS_NULL:      PREFIX_OP("(unset)",  240, 241);
                case _IS_BOOL:     PREFIX_OP("(bool)",   240, 241);
                case IS_LONG:      PREFIX_OP("(int)",    240, 241);
                case IS_DOUBLE:    PREFIX_OP("(double)", 240, 241);
                case IS_STRING:    PREFIX_OP("(string)", 240, 241);
                case IS_ARRAY:     PREFIX_OP("(array)",  240, 241);
                case IS_OBJECT:    PREFIX_OP("(object)", 240, 241);
                EMPTY_SWITCH_DEFAULT_CASE();
            }
            break;
        case ZEND_AST_EMPTY:
            FUNC_OP("empty");
        case ZEND_AST_ISSET:
            FUNC_OP("isset");
        case ZEND_AST_SILENCE:
            PREFIX_OP("@", 240, 241);
        case ZEND_AST_SHELL_EXEC:
            smart_str_appendc(str, '`');
            if (ast->child[0]->kind == ZEND_AST_ENCAPS_LIST) {
                zend_ast_export_encaps_list(str, '`', (zend_ast_list*)ast->child[0], indent);
            } else {
                zval *zv;
                ZEND_ASSERT(ast->child[0]->kind == ZEND_AST_ZVAL);
                zv = zend_ast_get_zval(ast->child[0]);
                ZEND_ASSERT(Z_TYPE_P(zv) == IS_STRING);
                zend_ast_export_qstr(str, '`', Z_STR_P(zv));
            }
            smart_str_appendc(str, '`');
            break;
        case ZEND_AST_CLONE:
            PREFIX_OP("clone ", 270, 271);
        case ZEND_AST_EXIT:
            if (ast->child[0]) {
                FUNC_OP("exit");
            } else {
                APPEND_STR("exit");
            }
            break;
        case ZEND_AST_PRINT:
            PREFIX_OP("print ", 60, 61);
        case ZEND_AST_INCLUDE_OR_EVAL:
            switch (ast->attr) {
                case ZEND_INCLUDE_ONCE: FUNC_OP("include_once");
                case ZEND_INCLUDE:      FUNC_OP("include");
                case ZEND_REQUIRE_ONCE: FUNC_OP("require_once");
                case ZEND_REQUIRE:      FUNC_OP("require");
                case ZEND_EVAL:         FUNC_OP("eval");
                EMPTY_SWITCH_DEFAULT_CASE();
            }
            break;
        case ZEND_AST_UNARY_OP:
            switch (ast->attr) {
                case ZEND_BW_NOT:   PREFIX_OP("~", 240, 241);
                case ZEND_BOOL_NOT: PREFIX_OP("!", 240, 241);
                EMPTY_SWITCH_DEFAULT_CASE();
            }
            break;
        case ZEND_AST_PRE_INC:
            PREFIX_OP("++", 240, 241);
        case ZEND_AST_PRE_DEC:
            PREFIX_OP("--", 240, 241);
        case ZEND_AST_POST_INC:
            POSTFIX_OP("++", 240, 241);
        case ZEND_AST_POST_DEC:
            POSTFIX_OP("--", 240, 241);
 
        case ZEND_AST_GLOBAL:
            APPEND_NODE_1("global");
        case ZEND_AST_UNSET:
            FUNC_OP("unset");
        case ZEND_AST_RETURN:
            APPEND_NODE_1("return");
        case ZEND_AST_LABEL:
            zend_ast_export_name(str, ast->child[0], 0, indent);
            smart_str_appendc(str, ':');
            break;
        case ZEND_AST_REF:
            smart_str_appendc(str, '&');
            ast = ast->child[0];
            goto tail_call;
        case ZEND_AST_HALT_COMPILER:
            APPEND_STR("__HALT_COMPILER()");
        case ZEND_AST_ECHO:
            APPEND_NODE_1("echo");
        case ZEND_AST_THROW:
            APPEND_NODE_1("throw");
        case ZEND_AST_GOTO:
            smart_str_appends(str, "goto ");
            zend_ast_export_name(str, ast->child[0], 0, indent);
            break;
        case ZEND_AST_BREAK:
            APPEND_NODE_1("break");
        case ZEND_AST_CONTINUE:
            APPEND_NODE_1("continue");
 
        /* 2 child nodes */
        case ZEND_AST_DIM:
            zend_ast_export_ex(str, ast->child[0], 260, indent);
            smart_str_appendc(str, '[');
            if (ast->child[1]) {
                zend_ast_export_ex(str, ast->child[1], 0, indent);
            }
            smart_str_appendc(str, ']');
            break;
        case ZEND_AST_PROP:
        case ZEND_AST_NULLSAFE_PROP:
            zend_ast_export_ex(str, ast->child[0], 0, indent);
            smart_str_appends(str, ast->kind == ZEND_AST_NULLSAFE_PROP ? "?->" : "->");
            zend_ast_export_var(str, ast->child[1], 0, indent);
            break;
        case ZEND_AST_STATIC_PROP:
            zend_ast_export_ns_name(str, ast->child[0], 0, indent);
            smart_str_appends(str, "::$");
            zend_ast_export_var(str, ast->child[1], 0, indent);
            break;
        case ZEND_AST_CALL:
            zend_ast_export_ns_name(str, ast->child[0], 0, indent);
            smart_str_appendc(str, '(');
            zend_ast_export_ex(str, ast->child[1], 0, indent);
            smart_str_appendc(str, ')');
            break;
        case ZEND_AST_PARENT_PROPERTY_HOOK_CALL:
            smart_str_append(str, Z_STR_P(zend_ast_get_zval(ast->child[0])));
            smart_str_appendc(str, '(');
            zend_ast_export_ex(str, ast->child[1], 0, indent);
            smart_str_appendc(str, ')');
            break;
        case ZEND_AST_CALLABLE_CONVERT:
            smart_str_appends(str, "...");
            break;
        case ZEND_AST_CLASS_CONST:
            zend_ast_export_ns_name(str, ast->child[0], 0, indent);
            smart_str_appends(str, "::");
            zend_ast_export_name(str, ast->child[1], 0, indent);
            break;
        case ZEND_AST_CLASS_NAME:
            if (ast->child[0] == NULL) {
                /* The const expr representation stores the fetch type instead. */
                switch (ast->attr) {
                    case ZEND_FETCH_CLASS_SELF:
                        smart_str_appends(str, "self");
                        break;
                    case ZEND_FETCH_CLASS_PARENT:
                        smart_str_appends(str, "parent");
                        break;
                    EMPTY_SWITCH_DEFAULT_CASE()
                }
            } else {
                zend_ast_export_ns_name(str, ast->child[0], 0, indent);
            }
            smart_str_appends(str, "::class");
            break;
        case ZEND_AST_ASSIGN:            BINARY_OP(" = ",   90, 91, 90);
        case ZEND_AST_ASSIGN_REF:        BINARY_OP(" =& ",  90, 91, 90);
        case ZEND_AST_ASSIGN_OP:
            switch (ast->attr) {
                case ZEND_ADD:    BINARY_OP(" += ",  90, 91, 90);
                case ZEND_SUB:    BINARY_OP(" -= ",  90, 91, 90);
                case ZEND_MUL:    BINARY_OP(" *= ",  90, 91, 90);
                case ZEND_DIV:    BINARY_OP(" /= ",  90, 91, 90);
                case ZEND_MOD:    BINARY_OP(" %= ",  90, 91, 90);
                case ZEND_SL:     BINARY_OP(" <<= ", 90, 91, 90);
                case ZEND_SR:     BINARY_OP(" >>= ", 90, 91, 90);
                case ZEND_CONCAT: BINARY_OP(" .= ",  90, 91, 90);
                case ZEND_BW_OR:  BINARY_OP(" |= ",  90, 91, 90);
                case ZEND_BW_AND: BINARY_OP(" &= ",  90, 91, 90);
                case ZEND_BW_XOR: BINARY_OP(" ^= ",  90, 91, 90);
                case ZEND_POW:    BINARY_OP(" **= ", 90, 91, 90);
                EMPTY_SWITCH_DEFAULT_CASE();
            }
            break;
        case ZEND_AST_ASSIGN_COALESCE: BINARY_OP(" \?\?= ", 90, 91, 90);
        case ZEND_AST_BINARY_OP:
            switch (ast->attr) {
                case ZEND_ADD:                 BINARY_OP(" + ",   200, 200, 201);
                case ZEND_SUB:                 BINARY_OP(" - ",   200, 200, 201);
                case ZEND_MUL:                 BINARY_OP(" * ",   210, 210, 211);
                case ZEND_DIV:                 BINARY_OP(" / ",   210, 210, 211);
                case ZEND_MOD:                 BINARY_OP(" % ",   210, 210, 211);
                case ZEND_SL:                  BINARY_OP(" << ",  190, 190, 191);
                case ZEND_SR:                  BINARY_OP(" >> ",  190, 190, 191);
                case ZEND_CONCAT:              BINARY_OP(" . ",   185, 185, 186);
                case ZEND_BW_OR:               BINARY_OP(" | ",   140, 140, 141);
                case ZEND_BW_AND:              BINARY_OP(" & ",   160, 160, 161);
                case ZEND_BW_XOR:              BINARY_OP(" ^ ",   150, 150, 151);
                case ZEND_IS_IDENTICAL:        BINARY_OP(" === ", 170, 171, 171);
                case ZEND_IS_NOT_IDENTICAL:    BINARY_OP(" !== ", 170, 171, 171);
                case ZEND_IS_EQUAL:            BINARY_OP(" == ",  170, 171, 171);
                case ZEND_IS_NOT_EQUAL:        BINARY_OP(" != ",  170, 171, 171);
                case ZEND_IS_SMALLER:          BINARY_OP(" < ",   180, 181, 181);
                case ZEND_IS_SMALLER_OR_EQUAL: BINARY_OP(" <= ",  180, 181, 181);
                case ZEND_POW:                 BINARY_OP(" ** ",  250, 251, 250);
                case ZEND_BOOL_XOR:            BINARY_OP(" xor ",  40,  40,  41);
                case ZEND_SPACESHIP:           BINARY_OP(" <=> ", 180, 181, 181);
                EMPTY_SWITCH_DEFAULT_CASE();
            }
            break;
        case ZEND_AST_GREATER:                 BINARY_OP(" > ",   180, 181, 181);
        case ZEND_AST_GREATER_EQUAL:           BINARY_OP(" >= ",  180, 181, 181);
        case ZEND_AST_AND:                     BINARY_OP(" && ",  130, 130, 131);
        case ZEND_AST_OR:                      BINARY_OP(" || ",  120, 120, 121);
        case ZEND_AST_ARRAY_ELEM:
            if (ast->child[1]) {
                zend_ast_export_ex(str, ast->child[1], 80, indent);
                smart_str_appends(str, " => ");
            }
            if (ast->attr)
                smart_str_appendc(str, '&');
            zend_ast_export_ex(str, ast->child[0], 80, indent);
            break;
        case ZEND_AST_NEW:
            smart_str_appends(str, "new ");
            if (ast->child[0]->kind == ZEND_AST_CLASS) {
                zend_ast_decl *decl = (zend_ast_decl *) ast->child[0];
                if (decl->child[3]) {
                    zend_ast_export_attributes(str, decl->child[3], indent, 0);
                }
                smart_str_appends(str, "class");
                if (!zend_ast_is_list(ast->child[1])
                        || zend_ast_get_list(ast->child[1])->children) {
                    smart_str_appendc(str, '(');
                    zend_ast_export_ex(str, ast->child[1], 0, indent);
                    smart_str_appendc(str, ')');
                }
                zend_ast_export_class_no_header(str, decl, indent);
            } else {
                zend_ast_export_ns_name(str, ast->child[0], 0, indent);
                smart_str_appendc(str, '(');
                zend_ast_export_ex(str, ast->child[1], 0, indent);
                smart_str_appendc(str, ')');
            }
            break;
        case ZEND_AST_INSTANCEOF:
            zend_ast_export_ex(str, ast->child[0], 0, indent);
            smart_str_appends(str, " instanceof ");
            zend_ast_export_ns_name(str, ast->child[1], 0, indent);
            break;
        case ZEND_AST_YIELD:
            if (priority > 70) smart_str_appendc(str, '(');
            smart_str_appends(str, "yield ");
            if (ast->child[0]) {
                if (ast->child[1]) {
                    zend_ast_export_ex(str, ast->child[1], 70, indent);
                    smart_str_appends(str, " => ");
                }
                zend_ast_export_ex(str, ast->child[0], 70, indent);
            }
            if (priority > 70) smart_str_appendc(str, ')');
            break;
        case ZEND_AST_YIELD_FROM:
            PREFIX_OP("yield from ", 85, 86);
        case ZEND_AST_COALESCE: BINARY_OP(" ?? ", 110, 111, 110);
        case ZEND_AST_STATIC:
            smart_str_appends(str, "static $");
            zend_ast_export_name(str, ast->child[0], 0, indent);
            APPEND_DEFAULT_VALUE(1);
        case ZEND_AST_WHILE:
            smart_str_appends(str, "while (");
            zend_ast_export_ex(str, ast->child[0], 0, indent);
            smart_str_appends(str, ") {\n");
            zend_ast_export_stmt(str, ast->child[1], indent + 1);
            zend_ast_export_indent(str, indent);
            smart_str_appendc(str, '}');
            break;
        case ZEND_AST_DO_WHILE:
            smart_str_appends(str, "do {\n");
            zend_ast_export_stmt(str, ast->child[0], indent + 1);
            zend_ast_export_indent(str, indent);
            smart_str_appends(str, "} while (");
            zend_ast_export_ex(str, ast->child[1], 0, indent);
            smart_str_appendc(str, ')');
            break;
 
        case ZEND_AST_IF_ELEM:
            if (ast->child[0]) {
                smart_str_appends(str, "if (");
                zend_ast_export_ex(str, ast->child[0], 0, indent);
                smart_str_appends(str, ") {\n");
                zend_ast_export_stmt(str, ast->child[1], indent + 1);
            } else {
                smart_str_appends(str, "else {\n");
                zend_ast_export_stmt(str, ast->child[1], indent + 1);
            }
            zend_ast_export_indent(str, indent);
            smart_str_appendc(str, '}');
            break;
        case ZEND_AST_SWITCH:
            smart_str_appends(str, "switch (");
            zend_ast_export_ex(str, ast->child[0], 0, indent);
            smart_str_appends(str, ") {\n");
            zend_ast_export_ex(str, ast->child[1], 0, indent + 1);
            zend_ast_export_indent(str, indent);
            smart_str_appendc(str, '}');
            break;
        case ZEND_AST_SWITCH_CASE:
            zend_ast_export_indent(str, indent);
            if (ast->child[0]) {
                smart_str_appends(str, "case ");
                zend_ast_export_ex(str, ast->child[0], 0, indent);
                smart_str_appends(str, ":\n");
            } else {
                smart_str_appends(str, "default:\n");
            }
            zend_ast_export_stmt(str, ast->child[1], indent + 1);
            break;
        case ZEND_AST_MATCH:
            smart_str_appends(str, "match (");
            zend_ast_export_ex(str, ast->child[0], 0, indent);
            smart_str_appends(str, ") {\n");
            zend_ast_export_ex(str, ast->child[1], 0, indent + 1);
            zend_ast_export_indent(str, indent);
            smart_str_appendc(str, '}');
            break;
        case ZEND_AST_MATCH_ARM:
            zend_ast_export_indent(str, indent);
            if (ast->child[0]) {
                zend_ast_export_list(str, (zend_ast_list*)ast->child[0], 1, 0, indent);
                smart_str_appends(str, " => ");
            } else {
                smart_str_appends(str, "default => ");
            }
            zend_ast_export_ex(str, ast->child[1], 0, 0);
            smart_str_appends(str, ",\n");
            break;
        case ZEND_AST_DECLARE:
            smart_str_appends(str, "declare(");
            ZEND_ASSERT(ast->child[0]->kind == ZEND_AST_CONST_DECL);
            zend_ast_export_list(str, (zend_ast_list*)ast->child[0], 1, 0, indent);
            smart_str_appendc(str, ')');
            if (ast->child[1]) {
                smart_str_appends(str, " {\n");
                zend_ast_export_stmt(str, ast->child[1], indent + 1);
                zend_ast_export_indent(str, indent);
                smart_str_appendc(str, '}');
            } else {
                smart_str_appendc(str, ';');
            }
            break;
        case ZEND_AST_PROP_ELEM:
            smart_str_appendc(str, '$');
            zend_ast_export_name(str, ast->child[0], 0, indent);
 
            zend_ast *default_value = ast->child[1];
            if (default_value) {
                smart_str_appends(str, " = ");
                zend_ast_export_ex(str, default_value, 0, indent + 1);
            }
 
            if (ast->child[3]) {
                zend_ast_export_hook_list(str, zend_ast_get_list(ast->child[3]), indent);
            }
            break;
        case ZEND_AST_CONST_ELEM:
            zend_ast_export_name(str, ast->child[0], 0, indent);
            APPEND_DEFAULT_VALUE(1);
        case ZEND_AST_USE_TRAIT:
            smart_str_appends(str, "use ");
            zend_ast_export_ex(str, ast->child[0], 0, indent);
            if (ast->child[1]) {
                smart_str_appends(str, " {\n");
                zend_ast_export_ex(str, ast->child[1], 0, indent + 1);
                zend_ast_export_indent(str, indent);
                smart_str_appends(str, "}");
            } else {
                smart_str_appends(str, ";");
            }
            break;
        case ZEND_AST_TRAIT_PRECEDENCE:
            zend_ast_export_ex(str, ast->child[0], 0, indent);
            smart_str_appends(str, " insteadof ");
            zend_ast_export_ex(str, ast->child[1], 0, indent);
            break;
        case ZEND_AST_METHOD_REFERENCE:
            if (ast->child[0]) {
                zend_ast_export_name(str, ast->child[0], 0, indent);
                smart_str_appends(str, "::");
            }
            zend_ast_export_name(str, ast->child[1], 0, indent);
            break;
        case ZEND_AST_NAMESPACE:
            smart_str_appends(str, "namespace");
            if (ast->child[0]) {
                smart_str_appendc(str, ' ');
                zend_ast_export_name(str, ast->child[0], 0, indent);
            }
            if (ast->child[1]) {
                smart_str_appends(str, " {\n");
                zend_ast_export_stmt(str, ast->child[1], indent + 1);
                zend_ast_export_indent(str, indent);
                smart_str_appends(str, "}\n");
            } else {
                smart_str_appendc(str, ';');
            }
            break;
        case ZEND_AST_USE_ELEM:
        case ZEND_AST_TRAIT_ALIAS:
            zend_ast_export_name(str, ast->child[0], 0, indent);
            if (ast->attr & ZEND_ACC_PUBLIC) {
                smart_str_appends(str, " as public");
            } else if (ast->attr & ZEND_ACC_PROTECTED) {
                smart_str_appends(str, " as protected");
            } else if (ast->attr & ZEND_ACC_PRIVATE) {
                smart_str_appends(str, " as private");
            } else if (ast->child[1]) {
                smart_str_appends(str, " as");
            }
            if (ast->child[1]) {
                smart_str_appendc(str, ' ');
                zend_ast_export_name(str, ast->child[1], 0, indent);
            }
            break;
        case ZEND_AST_NAMED_ARG:
            smart_str_append(str, zend_ast_get_str(ast->child[0]));
            smart_str_appends(str, ": ");
            ast = ast->child[1];
            goto tail_call;
 
        /* 3 child nodes */
        case ZEND_AST_METHOD_CALL:
        case ZEND_AST_NULLSAFE_METHOD_CALL:
            zend_ast_export_ex(str, ast->child[0], 0, indent);
            smart_str_appends(str, ast->kind == ZEND_AST_NULLSAFE_METHOD_CALL ? "?->" : "->");
            zend_ast_export_var(str, ast->child[1], 0, indent);
            smart_str_appendc(str, '(');
            zend_ast_export_ex(str, ast->child[2], 0, indent);
            smart_str_appendc(str, ')');
            break;
        case ZEND_AST_STATIC_CALL:
            zend_ast_export_ns_name(str, ast->child[0], 0, indent);
            smart_str_appends(str, "::");
            zend_ast_export_var(str, ast->child[1], 0, indent);
            smart_str_appendc(str, '(');
            zend_ast_export_ex(str, ast->child[2], 0, indent);
            smart_str_appendc(str, ')');
            break;
        case ZEND_AST_CONDITIONAL:
            if (priority > 100) smart_str_appendc(str, '(');
            zend_ast_export_ex(str, ast->child[0], 100, indent);
            if (ast->child[1]) {
                smart_str_appends(str, " ? ");
                zend_ast_export_ex(str, ast->child[1], 101, indent);
                smart_str_appends(str, " : ");
            } else {
                smart_str_appends(str, " ?: ");
            }
            zend_ast_export_ex(str, ast->child[2], 101, indent);
            if (priority > 100) smart_str_appendc(str, ')');
            break;
 
        case ZEND_AST_TRY:
            smart_str_appends(str, "try {\n");
            zend_ast_export_stmt(str, ast->child[0], indent + 1);
            zend_ast_export_indent(str, indent);
            zend_ast_export_ex(str, ast->child[1], 0, indent);
            if (ast->child[2]) {
                smart_str_appends(str, "} finally {\n");
                zend_ast_export_stmt(str, ast->child[2], indent + 1);
                zend_ast_export_indent(str, indent);
            }
            smart_str_appendc(str, '}');
            break;
        case ZEND_AST_CATCH:
            smart_str_appends(str, "} catch (");
            zend_ast_export_catch_name_list(str, zend_ast_get_list(ast->child[0]), indent);
            if (ast->child[1]) {
                smart_str_appends(str, " $");
                zend_ast_export_var(str, ast->child[1], 0, indent);
            }
            smart_str_appends(str, ") {\n");
            zend_ast_export_stmt(str, ast->child[2], indent + 1);
            zend_ast_export_indent(str, indent);
            break;
        case ZEND_AST_PARAM:
            if (ast->child[3]) {
                zend_ast_export_attributes(str, ast->child[3], indent, 0);
            }
            zend_ast_export_visibility(str, ast->attr, ZEND_MODIFIER_TARGET_CPP);
            if (ast->child[0]) {
                zend_ast_export_type(str, ast->child[0], indent);
                smart_str_appendc(str, ' ');
            }
            if (ast->attr & ZEND_PARAM_REF) {
                smart_str_appendc(str, '&');
            }
            if (ast->attr & ZEND_PARAM_VARIADIC) {
                smart_str_appends(str, "...");
            }
            smart_str_appendc(str, '$');
            zend_ast_export_name(str, ast->child[1], 0, indent);
            if (ast->child[2]) {
                smart_str_appends(str, " = ");
                zend_ast_export_ex(str, ast->child[2], 0, indent);
            }
            if (ast->child[5]) {
                zend_ast_export_hook_list(str, zend_ast_get_list(ast->child[5]), indent);
            }
            break;
        case ZEND_AST_ENUM_CASE:
            if (ast->child[3]) {
                zend_ast_export_attributes(str, ast->child[3], indent, 1);
            }
            smart_str_appends(str, "case ");
            zend_ast_export_name(str, ast->child[0], 0, indent);
            if (ast->child[1]) {
                smart_str_appends(str, " = ");
                zend_ast_export_ex(str, ast->child[1], 0, indent);
            }
            break;
 
        /* 4 child nodes */
        case ZEND_AST_FOR:
            smart_str_appends(str, "for (");
            zend_ast_export_ex(str, ast->child[0], 0, indent);
            smart_str_appendc(str, ';');
            if (ast->child[1]) {
                smart_str_appendc(str, ' ');
                zend_ast_export_ex(str, ast->child[1], 0, indent);
            }
            smart_str_appendc(str, ';');
            if (ast->child[2]) {
                smart_str_appendc(str, ' ');
                zend_ast_export_ex(str, ast->child[2], 0, indent);
            }
            smart_str_appends(str, ") {\n");
            zend_ast_export_stmt(str, ast->child[3], indent + 1);
            zend_ast_export_indent(str, indent);
            smart_str_appendc(str, '}');
            break;
        case ZEND_AST_FOREACH:
            smart_str_appends(str, "foreach (");
            zend_ast_export_ex(str, ast->child[0], 0, indent);
            smart_str_appends(str, " as ");
            if (ast->child[2]) {
                zend_ast_export_ex(str, ast->child[2], 0, indent);
                smart_str_appends(str, " => ");
            }
            zend_ast_export_ex(str, ast->child[1], 0, indent);
            smart_str_appends(str, ") {\n");
            zend_ast_export_stmt(str, ast->child[3], indent + 1);
            zend_ast_export_indent(str, indent);
            smart_str_appendc(str, '}');
            break;
        EMPTY_SWITCH_DEFAULT_CASE();
    }
    return;
 
binary_op:
    if (priority > p) smart_str_appendc(str, '(');
    zend_ast_export_ex(str, ast->child[0], pl, indent);
    smart_str_appends(str, op);
    zend_ast_export_ex(str, ast->child[1], pr, indent);
    if (priority > p) smart_str_appendc(str, ')');
    return;
 
prefix_op:
    if (priority > p) smart_str_appendc(str, '(');
    smart_str_appends(str, op);
    zend_ast_export_ex(str, ast->child[0], pl, indent);
    if (priority > p) smart_str_appendc(str, ')');
    return;
 
postfix_op:
    if (priority > p) smart_str_appendc(str, '(');
    zend_ast_export_ex(str, ast->child[0], pl, indent);
    smart_str_appends(str, op);
    if (priority > p) smart_str_appendc(str, ')');
    return;
 
func_op:
    smart_str_appends(str, op);
    smart_str_appendc(str, '(');
    zend_ast_export_ex(str, ast->child[0], 0, indent);
    smart_str_appendc(str, ')');
    return;
 
append_node_1:
    smart_str_appends(str, op);
    if (ast->child[0]) {
        smart_str_appendc(str, ' ');
        ast = ast->child[0];
        goto tail_call;
    }
    return;
 
append_str:
    smart_str_appends(str, op);
    return;
 
append_default_value:
    if (ast->child[p]) {
        smart_str_appends(str, " = ");
        ast = ast->child[p];
        goto tail_call;
    }
    return;
}
 
ZEND_API ZEND_COLD zend_string *zend_ast_export(const char *prefix, zend_ast *ast, const char *suffix)
{
    smart_str str = {0};
 
    smart_str_appends(&str, prefix);
    zend_ast_export_ex(&str, ast, 0, 0);
    smart_str_appends(&str, suffix);
    smart_str_0(&str);
    return str.s;
}
 
zend_ast * ZEND_FASTCALL zend_ast_with_attributes(zend_ast *ast, zend_ast *attr)
{
    ZEND_ASSERT(attr->kind == ZEND_AST_ATTRIBUTE_LIST);
 
    switch (ast->kind) {
    case ZEND_AST_FUNC_DECL:
    case ZEND_AST_CLOSURE:
    case ZEND_AST_METHOD:
    case ZEND_AST_ARROW_FUNC:
    case ZEND_AST_PROPERTY_HOOK:
        ((zend_ast_decl *) ast)->child[4] = attr;
        break;
    case ZEND_AST_CLASS:
        ((zend_ast_decl *) ast)->child[3] = attr;
        break;
    case ZEND_AST_PROP_GROUP:
        ast->child[2] = attr;
        break;
    case ZEND_AST_PARAM:
    case ZEND_AST_ENUM_CASE:
        ast->child[3] = attr;
        break;
    case ZEND_AST_CLASS_CONST_GROUP:
        ast->child[1] = attr;
        break;
    EMPTY_SWITCH_DEFAULT_CASE()
    }
 
    return ast;
}