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js-scanner.c
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js-scanner.c
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/* Copyright JS Foundation and other contributors, http:https://js.foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http:https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "jcontext.h"
#include "js-parser-internal.h"
#include "js-scanner-internal.h"
#include "lit-char-helpers.h"
#if JERRY_PARSER
/** \addtogroup parser Parser
* @{
*
* \addtogroup jsparser JavaScript
* @{
*
* \addtogroup jsparser_scanner Scanner
* @{
*/
/**
* Scan return types.
*/
typedef enum
{
SCAN_NEXT_TOKEN, /**< get next token after return */
SCAN_KEEP_TOKEN, /**< keep the current token after return */
} scan_return_types_t;
/**
* Checks whether token type is "of".
*/
#define SCANNER_IDENTIFIER_IS_OF() (lexer_token_is_identifier (context_p, "of", 2))
JERRY_STATIC_ASSERT (SCANNER_FROM_LITERAL_POOL_TO_COMPUTED (SCANNER_LITERAL_POOL_GENERATOR)
== SCAN_STACK_COMPUTED_GENERATOR,
scanner_invalid_conversion_from_literal_pool_generator_to_computed_generator);
JERRY_STATIC_ASSERT (SCANNER_FROM_LITERAL_POOL_TO_COMPUTED (SCANNER_LITERAL_POOL_ASYNC) == SCAN_STACK_COMPUTED_ASYNC,
scanner_invalid_conversion_from_literal_pool_async_to_computed_async);
JERRY_STATIC_ASSERT (SCANNER_FROM_COMPUTED_TO_LITERAL_POOL (SCAN_STACK_COMPUTED_GENERATOR)
== SCANNER_LITERAL_POOL_GENERATOR,
scanner_invalid_conversion_from_computed_generator_to_literal_pool_generator);
JERRY_STATIC_ASSERT (SCANNER_FROM_COMPUTED_TO_LITERAL_POOL (SCAN_STACK_COMPUTED_ASYNC) == SCANNER_LITERAL_POOL_ASYNC,
scanner_invalid_conversion_from_computed_async_to_literal_pool_async);
/**
* Change scanner mode from primary expression to post primary expression.
*
* @return SCAN_NEXT_TOKEN to read the next token, or SCAN_KEEP_TOKEN to do nothing
*/
static scan_return_types_t
scanner_primary_to_post_primary_expression (parser_context_t *context_p, /**< context */
scanner_context_t *scanner_context_p) /* scanner context */
{
scanner_context_p->mode = SCAN_MODE_POST_PRIMARY_EXPRESSION;
if (JERRY_UNLIKELY (context_p->stack_top_uint8 == SCAN_STACK_CLASS_FIELD_INITIALIZER
&& (context_p->status_flags & PARSER_IS_STRICT)))
{
lexer_scan_identifier (context_p, LEXER_PARSE_CHECK_KEYWORDS | LEXER_PARSE_NO_STRICT_IDENT_ERROR);
if (context_p->token.type == LEXER_LITERAL && lexer_compare_literal_to_string (context_p, "static", 6))
{
scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION_END;
}
return SCAN_KEEP_TOKEN;
}
return SCAN_NEXT_TOKEN;
} /* scanner_primary_to_post_primary_expression */
/**
* Scan primary expression.
*
* @return SCAN_NEXT_TOKEN to read the next token, or SCAN_KEEP_TOKEN to do nothing
*/
static scan_return_types_t
scanner_scan_primary_expression (parser_context_t *context_p, /**< context */
scanner_context_t *scanner_context_p, /* scanner context */
lexer_token_type_t type, /**< current token type */
scan_stack_modes_t stack_top) /**< current stack top */
{
switch (type)
{
case LEXER_KEYW_NEW:
{
scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION_AFTER_NEW;
if (scanner_try_scan_new_target (context_p))
{
return scanner_primary_to_post_primary_expression (context_p, scanner_context_p);
}
break;
}
case LEXER_DIVIDE:
case LEXER_ASSIGN_DIVIDE:
{
lexer_construct_regexp_object (context_p, true);
return scanner_primary_to_post_primary_expression (context_p, scanner_context_p);
}
case LEXER_KEYW_FUNCTION:
{
uint16_t status_flags = SCANNER_LITERAL_POOL_FUNCTION;
#if JERRY_MODULE_SYSTEM
bool is_export_default = stack_top == SCAN_STACK_EXPORT_DEFAULT;
#endif /* JERRY_MODULE_SYSTEM */
if (scanner_context_p->async_source_p != NULL)
{
status_flags |= SCANNER_LITERAL_POOL_ASYNC;
}
if (lexer_consume_generator (context_p))
{
status_flags |= SCANNER_LITERAL_POOL_GENERATOR;
}
scanner_push_literal_pool (context_p, scanner_context_p, status_flags);
lexer_next_token (context_p);
if (context_p->token.type == LEXER_LITERAL && context_p->token.lit_location.type == LEXER_IDENT_LITERAL)
{
#if JERRY_MODULE_SYSTEM
if (is_export_default)
{
lexer_lit_location_t *location_p;
location_p = scanner_add_custom_literal (context_p,
scanner_context_p->active_literal_pool_p->prev_p,
&context_p->token.lit_location);
scanner_detect_invalid_let (context_p, location_p);
location_p->type |= SCANNER_LITERAL_IS_FUNC | SCANNER_LITERAL_IS_LET;
}
#endif /* JERRY_MODULE_SYSTEM */
lexer_next_token (context_p);
}
#if JERRY_MODULE_SYSTEM
else if (is_export_default)
{
lexer_lit_location_t *location_p;
location_p = scanner_add_custom_literal (context_p,
scanner_context_p->active_literal_pool_p->prev_p,
&lexer_default_literal);
location_p->type |= SCANNER_LITERAL_IS_FUNC | SCANNER_LITERAL_IS_LET;
}
#endif /* JERRY_MODULE_SYSTEM */
parser_stack_push_uint8 (context_p, SCAN_STACK_FUNCTION_EXPRESSION);
scanner_context_p->mode = SCAN_MODE_FUNCTION_ARGUMENTS;
return SCAN_KEEP_TOKEN;
}
case LEXER_LEFT_PAREN:
{
scanner_scan_bracket (context_p, scanner_context_p);
return SCAN_KEEP_TOKEN;
}
case LEXER_LEFT_SQUARE:
{
scanner_push_destructuring_pattern (context_p, scanner_context_p, SCANNER_BINDING_NONE, false);
parser_stack_push_uint8 (context_p, SCAN_STACK_ARRAY_LITERAL);
scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION;
break;
}
case LEXER_LEFT_BRACE:
{
scanner_push_destructuring_pattern (context_p, scanner_context_p, SCANNER_BINDING_NONE, false);
parser_stack_push_uint8 (context_p, 0);
parser_stack_push_uint8 (context_p, SCAN_STACK_OBJECT_LITERAL);
scanner_context_p->mode = SCAN_MODE_PROPERTY_NAME;
return SCAN_KEEP_TOKEN;
}
case LEXER_HASHMARK:
{
if (!lexer_scan_private_identifier (context_p))
{
scanner_raise_error (context_p);
}
return SCAN_KEEP_TOKEN;
}
case LEXER_TEMPLATE_LITERAL:
{
if (context_p->source_p[-1] != LIT_CHAR_GRAVE_ACCENT)
{
parser_stack_push_uint8 (context_p, SCAN_STACK_TEMPLATE_STRING);
scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION;
break;
}
/* The string is a normal string literal. */
/* FALLTHRU */
}
case LEXER_LITERAL:
{
const uint8_t *source_p = context_p->source_p;
if (context_p->token.lit_location.type == LEXER_IDENT_LITERAL && lexer_check_arrow (context_p))
{
scanner_scan_simple_arrow (context_p, scanner_context_p, source_p);
return SCAN_KEEP_TOKEN;
}
if (JERRY_UNLIKELY (lexer_token_is_async (context_p)))
{
scanner_context_p->async_source_p = source_p;
scanner_check_async_function (context_p, scanner_context_p);
return SCAN_KEEP_TOKEN;
}
if (context_p->token.lit_location.type == LEXER_IDENT_LITERAL)
{
#if JERRY_MODULE_SYSTEM
if (stack_top == SCAN_STACK_EXPORT_DEFAULT)
{
lexer_lit_location_t *location_p = scanner_add_literal (context_p, scanner_context_p);
location_p->type |= (SCANNER_LITERAL_IS_USED | SCANNER_LITERAL_IS_VAR);
scanner_detect_eval_call (context_p, scanner_context_p);
return scanner_primary_to_post_primary_expression (context_p, scanner_context_p);
}
#endif /* JERRY_MODULE_SYSTEM */
scanner_add_reference (context_p, scanner_context_p);
}
/* FALLTHRU */
}
case LEXER_KEYW_THIS:
case LEXER_LIT_TRUE:
case LEXER_LIT_FALSE:
case LEXER_LIT_NULL:
{
return scanner_primary_to_post_primary_expression (context_p, scanner_context_p);
}
case LEXER_KEYW_SUPER:
{
scanner_context_p->active_literal_pool_p->status_flags |= SCANNER_LITERAL_POOL_HAS_SUPER_REFERENCE;
return scanner_primary_to_post_primary_expression (context_p, scanner_context_p);
}
case LEXER_KEYW_CLASS:
{
scanner_push_class_declaration (context_p, scanner_context_p, SCAN_STACK_CLASS_EXPRESSION);
if (context_p->token.type != LEXER_LITERAL || context_p->token.lit_location.type != LEXER_IDENT_LITERAL)
{
return SCAN_KEEP_TOKEN;
}
break;
}
case LEXER_RIGHT_SQUARE:
{
if (stack_top != SCAN_STACK_ARRAY_LITERAL)
{
scanner_raise_error (context_p);
}
scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION_END;
return SCAN_KEEP_TOKEN;
}
case LEXER_THREE_DOTS:
{
/* Elision or spread arguments */
if (stack_top != SCAN_STACK_PAREN_EXPRESSION && stack_top != SCAN_STACK_ARRAY_LITERAL)
{
scanner_raise_error (context_p);
}
scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION;
break;
}
case LEXER_COMMA:
{
if (stack_top != SCAN_STACK_ARRAY_LITERAL)
{
scanner_raise_error (context_p);
}
scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION;
if (scanner_context_p->binding_type != SCANNER_BINDING_NONE)
{
scanner_context_p->mode = SCAN_MODE_BINDING;
}
break;
}
case LEXER_KEYW_YIELD:
{
lexer_next_token (context_p);
if (lexer_check_yield_no_arg (context_p))
{
scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION_END;
}
if (context_p->token.type == LEXER_MULTIPLY)
{
return SCAN_NEXT_TOKEN;
}
return SCAN_KEEP_TOKEN;
}
#if JERRY_MODULE_SYSTEM
case LEXER_KEYW_IMPORT:
{
lexer_next_token (context_p);
if (context_p->token.type == LEXER_DOT)
{
scanner_check_import_meta (context_p);
}
else if (context_p->token.type != LEXER_LEFT_PAREN)
{
scanner_raise_error (context_p);
}
scanner_context_p->mode = SCAN_MODE_POST_PRIMARY_EXPRESSION;
return SCAN_KEEP_TOKEN;
}
#endif /* JERRY_MODULE_SYSTEM */
case LEXER_RIGHT_PAREN:
{
if (stack_top == SCAN_STACK_PAREN_EXPRESSION)
{
parser_stack_pop_uint8 (context_p);
if (context_p->stack_top_uint8 == SCAN_STACK_USE_ASYNC)
{
scanner_add_async_literal (context_p, scanner_context_p);
}
return scanner_primary_to_post_primary_expression (context_p, scanner_context_p);
}
/* FALLTHRU */
}
default:
{
scanner_raise_error (context_p);
}
}
return SCAN_NEXT_TOKEN;
} /* scanner_scan_primary_expression */
/**
* Scan the tokens after the primary expression.
*
* @return true for break, false for fall through
*/
static bool
scanner_scan_post_primary_expression (parser_context_t *context_p, /**< context */
scanner_context_t *scanner_context_p, /**< scanner context */
lexer_token_type_t type, /**< current token type */
scan_stack_modes_t stack_top) /**< current stack top */
{
switch (type)
{
case LEXER_DOT:
{
lexer_scan_identifier (context_p, LEXER_PARSE_NO_OPTS);
if (context_p->token.type == LEXER_HASHMARK)
{
context_p->token.flags |= LEXER_NO_SKIP_SPACES;
lexer_next_token (context_p);
}
if (context_p->token.type != LEXER_LITERAL || context_p->token.lit_location.type != LEXER_IDENT_LITERAL)
{
scanner_raise_error (context_p);
}
return true;
}
case LEXER_LEFT_PAREN:
{
parser_stack_push_uint8 (context_p, SCAN_STACK_PAREN_EXPRESSION);
scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION;
return true;
}
case LEXER_TEMPLATE_LITERAL:
{
if (JERRY_UNLIKELY (context_p->source_p[-1] != LIT_CHAR_GRAVE_ACCENT))
{
scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION;
parser_stack_push_uint8 (context_p, SCAN_STACK_TAGGED_TEMPLATE_LITERAL);
}
return true;
}
case LEXER_LEFT_SQUARE:
{
parser_stack_push_uint8 (context_p, SCAN_STACK_PROPERTY_ACCESSOR);
scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION;
return true;
}
case LEXER_INCREASE:
case LEXER_DECREASE:
{
scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION_END;
if (context_p->token.flags & LEXER_WAS_NEWLINE)
{
return false;
}
lexer_next_token (context_p);
type = (lexer_token_type_t) context_p->token.type;
if (type != LEXER_QUESTION_MARK)
{
break;
}
/* FALLTHRU */
}
case LEXER_QUESTION_MARK:
{
parser_stack_push_uint8 (context_p, SCAN_STACK_COLON_EXPRESSION);
scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION;
return true;
}
default:
{
break;
}
}
if (LEXER_IS_BINARY_OP_TOKEN (type) && (type != LEXER_KEYW_IN || !SCANNER_IS_FOR_START (stack_top)))
{
scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION;
return true;
}
return false;
} /* scanner_scan_post_primary_expression */
/**
* Scan the tokens after the primary expression.
*
* @return SCAN_NEXT_TOKEN to read the next token, or SCAN_KEEP_TOKEN to do nothing
*/
static scan_return_types_t
scanner_scan_primary_expression_end (parser_context_t *context_p, /**< context */
scanner_context_t *scanner_context_p, /**< scanner context */
lexer_token_type_t type, /**< current token type */
scan_stack_modes_t stack_top) /**< current stack top */
{
if (type == LEXER_COMMA)
{
switch (stack_top)
{
case SCAN_STACK_VAR:
case SCAN_STACK_LET:
case SCAN_STACK_CONST:
case SCAN_STACK_FOR_VAR_START:
case SCAN_STACK_FOR_LET_START:
case SCAN_STACK_FOR_CONST_START:
{
scanner_context_p->mode = SCAN_MODE_VAR_STATEMENT;
return SCAN_NEXT_TOKEN;
}
case SCAN_STACK_COLON_EXPRESSION:
{
scanner_raise_error (context_p);
break;
}
case SCAN_STACK_BINDING_INIT:
case SCAN_STACK_BINDING_LIST_INIT:
{
break;
}
case SCAN_STACK_ARROW_ARGUMENTS:
{
lexer_next_token (context_p);
scanner_check_arrow_arg (context_p, scanner_context_p);
return SCAN_KEEP_TOKEN;
}
case SCAN_STACK_ARROW_EXPRESSION:
{
break;
}
case SCAN_STACK_CLASS_FIELD_INITIALIZER:
{
scanner_raise_error (context_p);
break;
}
case SCAN_STACK_FUNCTION_PARAMETERS:
{
scanner_context_p->mode = SCAN_MODE_CONTINUE_FUNCTION_ARGUMENTS;
parser_stack_pop_uint8 (context_p);
return SCAN_NEXT_TOKEN;
}
case SCAN_STACK_ARRAY_LITERAL:
{
scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION;
if (scanner_context_p->binding_type != SCANNER_BINDING_NONE)
{
scanner_context_p->mode = SCAN_MODE_BINDING;
}
return SCAN_NEXT_TOKEN;
}
case SCAN_STACK_OBJECT_LITERAL:
{
scanner_context_p->mode = SCAN_MODE_PROPERTY_NAME;
return SCAN_KEEP_TOKEN;
}
default:
{
scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION;
return SCAN_NEXT_TOKEN;
}
}
}
switch (stack_top)
{
case SCAN_STACK_WITH_EXPRESSION:
{
if (type != LEXER_RIGHT_PAREN)
{
break;
}
parser_stack_pop_uint8 (context_p);
uint16_t status_flags = scanner_context_p->active_literal_pool_p->status_flags;
parser_stack_push_uint8 (context_p, (status_flags & SCANNER_LITERAL_POOL_IN_WITH) ? 1 : 0);
parser_stack_push_uint8 (context_p, SCAN_STACK_WITH_STATEMENT);
status_flags |= SCANNER_LITERAL_POOL_IN_WITH;
scanner_context_p->active_literal_pool_p->status_flags = status_flags;
scanner_context_p->mode = SCAN_MODE_STATEMENT;
return SCAN_NEXT_TOKEN;
}
case SCAN_STACK_DO_EXPRESSION:
{
if (type != LEXER_RIGHT_PAREN)
{
break;
}
scanner_context_p->mode = SCAN_MODE_STATEMENT_END;
return SCAN_NEXT_TOKEN;
}
case SCAN_STACK_WHILE_EXPRESSION:
{
if (type != LEXER_RIGHT_PAREN)
{
break;
}
scanner_source_start_t source_start;
parser_stack_pop_uint8 (context_p);
parser_stack_pop (context_p, &source_start, sizeof (scanner_source_start_t));
scanner_location_info_t *location_info_p;
location_info_p = (scanner_location_info_t *) scanner_insert_info (context_p,
source_start.source_p,
sizeof (scanner_location_info_t));
location_info_p->info.type = SCANNER_TYPE_WHILE;
scanner_get_location (&location_info_p->location, context_p);
scanner_context_p->mode = SCAN_MODE_STATEMENT;
return SCAN_NEXT_TOKEN;
}
case SCAN_STACK_PAREN_EXPRESSION:
{
if (type != LEXER_RIGHT_PAREN)
{
break;
}
parser_stack_pop_uint8 (context_p);
if (context_p->stack_top_uint8 == SCAN_STACK_USE_ASYNC)
{
scanner_add_async_literal (context_p, scanner_context_p);
}
scanner_context_p->mode = SCAN_MODE_POST_PRIMARY_EXPRESSION;
return SCAN_NEXT_TOKEN;
}
case SCAN_STACK_STATEMENT_WITH_EXPR:
{
if (type != LEXER_RIGHT_PAREN)
{
break;
}
parser_stack_pop_uint8 (context_p);
if (context_p->stack_top_uint8 == SCAN_STACK_IF_STATEMENT)
{
scanner_check_function_after_if (context_p, scanner_context_p);
return SCAN_KEEP_TOKEN;
}
scanner_context_p->mode = SCAN_MODE_STATEMENT;
return SCAN_NEXT_TOKEN;
}
case SCAN_STACK_BINDING_LIST_INIT:
{
parser_stack_pop_uint8 (context_p);
JERRY_ASSERT (context_p->stack_top_uint8 == SCAN_STACK_ARRAY_LITERAL
|| context_p->stack_top_uint8 == SCAN_STACK_OBJECT_LITERAL
|| context_p->stack_top_uint8 == SCAN_STACK_LET || context_p->stack_top_uint8 == SCAN_STACK_CONST
|| context_p->stack_top_uint8 == SCAN_STACK_FOR_LET_START
|| context_p->stack_top_uint8 == SCAN_STACK_FOR_CONST_START
|| context_p->stack_top_uint8 == SCAN_STACK_FUNCTION_PARAMETERS
|| context_p->stack_top_uint8 == SCAN_STACK_ARROW_ARGUMENTS);
scanner_binding_item_t *item_p = scanner_context_p->active_binding_list_p->items_p;
while (item_p != NULL)
{
if (item_p->literal_p->type & SCANNER_LITERAL_IS_USED)
{
item_p->literal_p->type |= SCANNER_LITERAL_EARLY_CREATE;
}
item_p = item_p->next_p;
}
scanner_pop_binding_list (scanner_context_p);
scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION_END;
return SCAN_KEEP_TOKEN;
}
case SCAN_STACK_BINDING_INIT:
{
scanner_binding_literal_t binding_literal;
parser_stack_pop_uint8 (context_p);
parser_stack_pop (context_p, &binding_literal, sizeof (scanner_binding_literal_t));
JERRY_ASSERT (context_p->stack_top_uint8 == SCAN_STACK_ARRAY_LITERAL
|| context_p->stack_top_uint8 == SCAN_STACK_OBJECT_LITERAL
|| context_p->stack_top_uint8 == SCAN_STACK_LET || context_p->stack_top_uint8 == SCAN_STACK_CONST
|| context_p->stack_top_uint8 == SCAN_STACK_FOR_LET_START
|| context_p->stack_top_uint8 == SCAN_STACK_FOR_CONST_START
|| context_p->stack_top_uint8 == SCAN_STACK_FUNCTION_PARAMETERS
|| context_p->stack_top_uint8 == SCAN_STACK_ARROW_ARGUMENTS);
JERRY_ASSERT (SCANNER_NEEDS_BINDING_LIST (scanner_context_p->binding_type)
|| (stack_top != SCAN_STACK_ARRAY_LITERAL && stack_top != SCAN_STACK_OBJECT_LITERAL));
if (binding_literal.literal_p->type & SCANNER_LITERAL_IS_USED)
{
binding_literal.literal_p->type |= SCANNER_LITERAL_EARLY_CREATE;
}
scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION_END;
return SCAN_KEEP_TOKEN;
}
case SCAN_STACK_VAR:
case SCAN_STACK_LET:
case SCAN_STACK_CONST:
{
#if JERRY_MODULE_SYSTEM
scanner_context_p->active_literal_pool_p->status_flags &= (uint16_t) ~SCANNER_LITERAL_POOL_IN_EXPORT;
#endif /* JERRY_MODULE_SYSTEM */
parser_stack_pop_uint8 (context_p);
return SCAN_KEEP_TOKEN;
}
case SCAN_STACK_FOR_VAR_START:
case SCAN_STACK_FOR_LET_START:
case SCAN_STACK_FOR_CONST_START:
case SCAN_STACK_FOR_START:
{
if (type == LEXER_KEYW_IN || SCANNER_IDENTIFIER_IS_OF ())
{
scanner_for_statement_t for_statement;
parser_stack_pop_uint8 (context_p);
parser_stack_pop (context_p, &for_statement, sizeof (scanner_for_statement_t));
scanner_location_info_t *location_info;
location_info = (scanner_location_info_t *) scanner_insert_info (context_p,
for_statement.u.source_p,
sizeof (scanner_location_info_t));
location_info->info.type = (type == LEXER_KEYW_IN) ? SCANNER_TYPE_FOR_IN : SCANNER_TYPE_FOR_OF;
if (stack_top == SCAN_STACK_FOR_LET_START || stack_top == SCAN_STACK_FOR_CONST_START)
{
parser_stack_push_uint8 (context_p, SCAN_STACK_PRIVATE_BLOCK_EARLY);
}
scanner_get_location (&location_info->location, context_p);
parser_stack_push_uint8 (context_p, SCAN_STACK_STATEMENT_WITH_EXPR);
scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION;
return SCAN_NEXT_TOKEN;
}
if (type != LEXER_SEMICOLON)
{
break;
}
scanner_for_statement_t for_statement;
parser_stack_pop_uint8 (context_p);
parser_stack_pop (context_p, NULL, sizeof (scanner_for_statement_t));
if (stack_top == SCAN_STACK_FOR_LET_START || stack_top == SCAN_STACK_FOR_CONST_START)
{
parser_stack_push_uint8 (context_p, SCAN_STACK_PRIVATE_BLOCK);
}
for_statement.u.source_p = context_p->source_p;
parser_stack_push (context_p, &for_statement, sizeof (scanner_for_statement_t));
parser_stack_push_uint8 (context_p, SCAN_STACK_FOR_CONDITION);
lexer_next_token (context_p);
if (context_p->token.type != LEXER_SEMICOLON)
{
scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION;
return SCAN_KEEP_TOKEN;
}
type = LEXER_SEMICOLON;
/* FALLTHRU */
}
case SCAN_STACK_FOR_CONDITION:
{
if (type != LEXER_SEMICOLON)
{
break;
}
scanner_for_statement_t for_statement;
parser_stack_pop_uint8 (context_p);
parser_stack_pop (context_p, &for_statement, sizeof (scanner_for_statement_t));
scanner_for_info_t *for_info_p;
for_info_p =
(scanner_for_info_t *) scanner_insert_info (context_p, for_statement.u.source_p, sizeof (scanner_for_info_t));
for_info_p->info.type = SCANNER_TYPE_FOR;
scanner_get_location (&for_info_p->expression_location, context_p);
for_info_p->end_location.source_p = NULL;
for_statement.u.for_info_p = for_info_p;
parser_stack_push (context_p, &for_statement, sizeof (scanner_for_statement_t));
parser_stack_push_uint8 (context_p, SCAN_STACK_FOR_EXPRESSION);
lexer_next_token (context_p);
if (context_p->token.type != LEXER_RIGHT_PAREN)
{
scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION;
return SCAN_KEEP_TOKEN;
}
type = LEXER_RIGHT_PAREN;
/* FALLTHRU */
}
case SCAN_STACK_FOR_EXPRESSION:
{
if (type != LEXER_RIGHT_PAREN)
{
break;
}
scanner_for_statement_t for_statement;
parser_stack_pop_uint8 (context_p);
parser_stack_pop (context_p, &for_statement, sizeof (scanner_for_statement_t));
scanner_get_location (&for_statement.u.for_info_p->end_location, context_p);
scanner_context_p->mode = SCAN_MODE_STATEMENT;
return SCAN_NEXT_TOKEN;
}
case SCAN_STACK_SWITCH_EXPRESSION:
{
if (type != LEXER_RIGHT_PAREN)
{
break;
}
lexer_next_token (context_p);
if (context_p->token.type != LEXER_LEFT_BRACE)
{
break;
}
scanner_literal_pool_t *literal_pool_p;
literal_pool_p = scanner_push_literal_pool (context_p, scanner_context_p, 0);
literal_pool_p->source_p = context_p->source_p - 1;
parser_stack_pop_uint8 (context_p);
scanner_switch_statement_t switch_statement = scanner_context_p->active_switch_statement;
parser_stack_push (context_p, &switch_statement, sizeof (scanner_switch_statement_t));
parser_stack_push_uint8 (context_p, SCAN_STACK_SWITCH_BLOCK);
scanner_switch_info_t *switch_info_p;
switch_info_p =
(scanner_switch_info_t *) scanner_insert_info (context_p, context_p->source_p, sizeof (scanner_switch_info_t));
switch_info_p->info.type = SCANNER_TYPE_SWITCH;
switch_info_p->case_p = NULL;
scanner_context_p->active_switch_statement.last_case_p = &switch_info_p->case_p;
lexer_next_token (context_p);
if (context_p->token.type != LEXER_RIGHT_BRACE && context_p->token.type != LEXER_KEYW_CASE
&& context_p->token.type != LEXER_KEYW_DEFAULT)
{
break;
}
scanner_context_p->mode = SCAN_MODE_STATEMENT_OR_TERMINATOR;
return SCAN_KEEP_TOKEN;
}
case SCAN_STACK_CASE_STATEMENT:
{
if (type != LEXER_COLON)
{
break;
}
scanner_source_start_t source_start;
parser_stack_pop_uint8 (context_p);
parser_stack_pop (context_p, &source_start, sizeof (scanner_source_start_t));
scanner_location_info_t *location_info_p;
location_info_p = (scanner_location_info_t *) scanner_insert_info (context_p,
source_start.source_p,
sizeof (scanner_location_info_t));
location_info_p->info.type = SCANNER_TYPE_CASE;
scanner_get_location (&location_info_p->location, context_p);
scanner_context_p->mode = SCAN_MODE_STATEMENT_OR_TERMINATOR;
return SCAN_NEXT_TOKEN;
}
case SCAN_STACK_COLON_EXPRESSION:
{
if (type != LEXER_COLON)
{
break;
}
scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION;
parser_stack_pop_uint8 (context_p);
return SCAN_NEXT_TOKEN;
}
case SCAN_STACK_ARRAY_LITERAL:
case SCAN_STACK_OBJECT_LITERAL:
{
if ((stack_top == SCAN_STACK_ARRAY_LITERAL && type != LEXER_RIGHT_SQUARE)
|| (stack_top == SCAN_STACK_OBJECT_LITERAL && type != LEXER_RIGHT_BRACE))
{
break;
}
scanner_source_start_t source_start;
uint8_t binding_type = scanner_context_p->binding_type;
uint8_t object_literal_flags = 0;
parser_stack_pop_uint8 (context_p);
if (stack_top == SCAN_STACK_OBJECT_LITERAL)
{
object_literal_flags = context_p->stack_top_uint8;
parser_stack_pop_uint8 (context_p);
}
scanner_context_p->binding_type = context_p->stack_top_uint8;
parser_stack_pop_uint8 (context_p);
parser_stack_pop (context_p, &source_start, sizeof (scanner_source_start_t));
lexer_next_token (context_p);
stack_top = (scan_stack_modes_t) context_p->stack_top_uint8;
if (binding_type == SCANNER_BINDING_CATCH && stack_top == SCAN_STACK_CATCH_STATEMENT)
{
scanner_pop_binding_list (scanner_context_p);
if (object_literal_flags != 0)
{
scanner_info_t *info_p = scanner_insert_info (context_p, source_start.source_p, sizeof (scanner_info_t));
info_p->type = SCANNER_TYPE_LITERAL_FLAGS;
info_p->u8_arg = object_literal_flags;
}
if (context_p->token.type != LEXER_RIGHT_PAREN)
{
scanner_raise_error (context_p);
}
lexer_next_token (context_p);
if (context_p->token.type != LEXER_LEFT_BRACE)
{
scanner_raise_error (context_p);
}
scanner_context_p->mode = SCAN_MODE_STATEMENT_OR_TERMINATOR;
return SCAN_NEXT_TOKEN;
}
if (stack_top == SCAN_STACK_FOR_START_PATTERN)
{
JERRY_ASSERT (binding_type == SCANNER_BINDING_NONE);
parser_stack_change_last_uint8 (context_p, SCAN_STACK_FOR_START);
if (context_p->token.type == LEXER_KEYW_IN || SCANNER_IDENTIFIER_IS_OF ())
{
scanner_info_t *info_p = scanner_insert_info (context_p, source_start.source_p, sizeof (scanner_info_t));
info_p->type = SCANNER_TYPE_LITERAL_FLAGS;
info_p->u8_arg = object_literal_flags | SCANNER_LITERAL_DESTRUCTURING_FOR;
return SCAN_KEEP_TOKEN;
}
}
if (context_p->token.type != LEXER_ASSIGN)
{
if (SCANNER_NEEDS_BINDING_LIST (binding_type))
{
scanner_pop_binding_list (scanner_context_p);
}
if ((stack_top == SCAN_STACK_ARRAY_LITERAL || stack_top == SCAN_STACK_OBJECT_LITERAL)
&& (binding_type == SCANNER_BINDING_NONE || binding_type == SCANNER_BINDING_ARROW_ARG)
&& context_p->token.type != LEXER_EOS && context_p->token.type != LEXER_COMMA
&& context_p->token.type != LEXER_RIGHT_BRACE && context_p->token.type != LEXER_RIGHT_SQUARE)
{
object_literal_flags |= SCANNER_LITERAL_NO_DESTRUCTURING;
}
if (object_literal_flags != 0)
{
scanner_info_t *info_p = scanner_insert_info (context_p, source_start.source_p, sizeof (scanner_info_t));
info_p->type = SCANNER_TYPE_LITERAL_FLAGS;
info_p->u8_arg = object_literal_flags;
}
scanner_context_p->mode = SCAN_MODE_POST_PRIMARY_EXPRESSION;
return SCAN_KEEP_TOKEN;
}
scanner_location_info_t *location_info_p;
location_info_p = (scanner_location_info_t *) scanner_insert_info (context_p,
source_start.source_p,
sizeof (scanner_location_info_t));
location_info_p->info.type = SCANNER_TYPE_INITIALIZER;
location_info_p->info.u8_arg = object_literal_flags;
scanner_get_location (&location_info_p->location, context_p);
scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION;
if (SCANNER_NEEDS_BINDING_LIST (binding_type))
{
scanner_binding_item_t *item_p = scanner_context_p->active_binding_list_p->items_p;
while (item_p != NULL)
{
item_p->literal_p->type &= (uint8_t) ~SCANNER_LITERAL_IS_USED;
item_p = item_p->next_p;
}
parser_stack_push_uint8 (context_p, SCAN_STACK_BINDING_LIST_INIT);
}
return SCAN_NEXT_TOKEN;
}
case SCAN_STACK_PROPERTY_ACCESSOR:
{
if (type != LEXER_RIGHT_SQUARE)
{
break;
}
scanner_context_p->mode = SCAN_MODE_POST_PRIMARY_EXPRESSION;
parser_stack_pop_uint8 (context_p);
return SCAN_NEXT_TOKEN;
}
case SCAN_STACK_COMPUTED_PROPERTY:
{