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Implement throwing ReferenceErrors for let/const variables. (#3264)

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JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2019-10-31 11:09:02 +01:00
committed by Dániel Bátyai
parent d1faed7d03
commit 6a342fcdd6
16 changed files with 306 additions and 75 deletions
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jerry-core/parser/js/js-scanner-internal.h
+23 -19
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@@ -34,38 +34,42 @@ typedef struct
const uint8_t *source_p; /**< start source byte */
} scanner_source_start_t;
/**
* Descriptor for storing a let/const literal on stack.
*/
typedef struct
{
lexer_lit_location_t *literal_p; /**< let/const literal */
} scanner_let_const_literal_t;
/**
* Flags for type member of lexer_lit_location_t structure in the literal pool.
*/
typedef enum
{
SCANNER_LITERAL_IS_ARG = (1 << 0), /**< literal is argument */
SCANNER_LITERAL_IS_LOCAL = (1 << 1), /**< literal is local (similar to let,
* but var is allowed with the same identifier) */
SCANNER_LITERAL_IS_VAR = (1 << 2), /**< literal is var */
SCANNER_LITERAL_IS_FUNC = (1 << 3), /**< literal is function */
SCANNER_LITERAL_NO_REG = (1 << 4), /**< literal cannot be stored in register */
SCANNER_LITERAL_IS_VAR = (1 << 1), /**< literal is var */
SCANNER_LITERAL_IS_FUNC = (1 << 2), /**< literal is function */
SCANNER_LITERAL_NO_REG = (1 << 3), /**< literal cannot be stored in register */
SCANNER_LITERAL_IS_LET = (1 << 4), /**< literal is let */
SCANNER_LITERAL_IS_CONST = (1 << 5), /**< literal is const */
#if ENABLED (JERRY_ES2015)
SCANNER_LITERAL_IS_LET = (1 << 5), /**< literal is let */
SCANNER_LITERAL_IS_CONST = (1 << 6), /**< literal is const */
SCANNER_LITERAL_IS_USED = (1 << 6), /**< literal is used */
#endif /* ENABLED (JERRY_ES2015) */
} scanner_literal_type_flags_t;
#if ENABLED (JERRY_ES2015)
/*
* Known combinations:
*
* SCANNER_LITERAL_IS_FUNC | SCANNER_LITERAL_IS_LET : function declared in this block, might be let or var
* SCANNER_LITERAL_IS_FUNC | SCANNER_LITERAL_IS_CONST : function declared in this block, must be let
* SCANNER_LITERAL_IS_LET | SCANNER_LITERAL_IS_CONST : catch block variable
*/
/**
* Tells whether the literal is let or const declaration.
* Literal is a local declration (let, const, catch variable, etc.)
*/
#define SCANNER_LITERAL_IS_LET_OR_CONST (SCANNER_LITERAL_IS_LET | SCANNER_LITERAL_IS_CONST)
#else /* !ENABLED (JERRY_ES2015) */
/**
* No literal is let or const declaration in ECMAScript 5.1.
*/
#define SCANNER_LITERAL_IS_LET_OR_CONST 0
#endif /* ENABLED (JERRY_ES2015) */
#define SCANNER_LITERAL_IS_LOCAL (SCANNER_LITERAL_IS_LET | SCANNER_LITERAL_IS_CONST)
/**
* For statement descriptor.