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Implement function destructuring argument support. (#3322)

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Furthermore create unmapped arguments objects if a function has a non-simple argument.
A few destructuring pattern issues were fixed as well.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2019-11-18 14:15:36 +01:00
committed by Dániel Bátyai
parent 359643b5b2
commit 8bdb32cc88
19 changed files with 753 additions and 202 deletions
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jerry-core/parser/js/js-parser-internal.h
+31 -14
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@@ -51,21 +51,22 @@ typedef enum
PARSER_HAS_NON_STRICT_ARG = (1u << 6), /**< the function has arguments which
* are not supported in strict mode */
PARSER_ARGUMENTS_NEEDED = (1u << 7), /**< arguments object must be created */
PARSER_LEXICAL_ENV_NEEDED = (1u << 9), /**< lexical environment object must be created */
PARSER_INSIDE_WITH = (1u << 10), /**< code block is inside a with statement */
PARSER_RESOLVE_BASE_FOR_CALLS = (1u << 11), /**< the this object must be resolved when
PARSER_LEXICAL_ENV_NEEDED = (1u << 8), /**< lexical environment object must be created */
PARSER_INSIDE_WITH = (1u << 9), /**< code block is inside a with statement */
PARSER_RESOLVE_BASE_FOR_CALLS = (1u << 10), /**< the this object must be resolved when
* a function without a base object is called */
PARSER_HAS_INITIALIZED_VARS = (1u << 12), /**< a CBC_INITIALIZE_VARS instruction must be emitted */
PARSER_HAS_LATE_LIT_INIT = (1u << 13), /**< allocate memory for this string after
PARSER_HAS_INITIALIZED_VARS = (1u << 11), /**< a CBC_INITIALIZE_VARS instruction must be emitted */
PARSER_HAS_LATE_LIT_INIT = (1u << 12), /**< allocate memory for this string after
* the local parser data is freed */
PARSER_NO_END_LABEL = (1u << 14), /**< return instruction must be inserted
PARSER_NO_END_LABEL = (1u << 13), /**< return instruction must be inserted
* after the last byte code */
PARSER_DEBUGGER_BREAKPOINT_APPENDED = (1u << 15), /**< pending (unsent) breakpoint
PARSER_DEBUGGER_BREAKPOINT_APPENDED = (1u << 14), /**< pending (unsent) breakpoint
* info is available */
#if ENABLED (JERRY_ES2015)
PARSER_INSIDE_BLOCK = (1u << 16), /**< script has a lexical environment for let and const */
PARSER_IS_ARROW_FUNCTION = (1u << 17), /**< an arrow function is parsed */
PARSER_ARROW_PARSE_ARGS = (1u << 18), /**< parse the argument list of an arrow function */
PARSER_INSIDE_BLOCK = (1u << 15), /**< script has a lexical environment for let and const */
PARSER_IS_ARROW_FUNCTION = (1u << 16), /**< an arrow function is parsed */
PARSER_ARROW_PARSE_ARGS = (1u << 17), /**< parse the argument list of an arrow function */
PARSER_FUNCTION_HAS_NON_SIMPLE_PARAM = (1u << 18), /**< function has a non simple parameter */
PARSER_FUNCTION_HAS_REST_PARAM = (1u << 19), /**< function has rest parameter */
/* These four status flags must be in this order. See PARSER_CLASS_PARSE_OPTS_OFFSET. */
PARSER_CLASS_CONSTRUCTOR = (1u << 20), /**< a class constructor is parsed (this value must be kept in
@@ -107,10 +108,11 @@ typedef enum
PARSER_PATTERN_NO_OPTS = 0, /**< parse the expression after '=' */
PARSER_PATTERN_BINDING = (1u << 0), /**< parse BindingPattern */
PARSER_PATTERN_TARGET_ON_STACK = (1u << 1), /**< assignment target is the topmost element on the stack */
PARSER_PATTERN_TARGET_DEFAULT = (1u << 3), /**< perform default value comparison for assignment target */
PARSER_PATTERN_NESTED_PATTERN = (1u << 4), /**< parse patter inside a pattern */
PARSER_PATTERN_LEXICAL = (1u << 5), /**< pattern is a lexical (let/const) declaration */
PARSER_PATTERN_REST_ELEMENT = (1u << 6), /**< parse rest array initializer */
PARSER_PATTERN_TARGET_DEFAULT = (1u << 2), /**< perform default value comparison for assignment target */
PARSER_PATTERN_NESTED_PATTERN = (1u << 3), /**< parse patter inside a pattern */
PARSER_PATTERN_LEXICAL = (1u << 4), /**< pattern is a lexical (let/const) declaration */
PARSER_PATTERN_REST_ELEMENT = (1u << 5), /**< parse rest array initializer */
PARSER_PATTERN_ARGUMENTS = (1u << 6), /**< parse arguments binding */
} parser_pattern_flags_t;
/**
@@ -159,8 +161,23 @@ typedef enum
*/
#define PARSER_IS_CLASS_CONSTRUCTOR_SUPER(flag) \
(((flag) & PARSER_CLASS_CONSTRUCTOR_SUPER) == PARSER_CLASS_CONSTRUCTOR_SUPER)
/* All flags that affect exotic arguments object creation. */
#define PARSER_ARGUMENTS_RELATED_FLAGS \
(PARSER_ARGUMENTS_NEEDED | PARSER_FUNCTION_HAS_NON_SIMPLE_PARAM | PARSER_IS_STRICT)
#else /* !ENABLED (JERRY_ES2015) */
/* All flags that affect exotic arguments object creation. */
#define PARSER_ARGUMENTS_RELATED_FLAGS \
(PARSER_ARGUMENTS_NEEDED | PARSER_IS_STRICT)
#endif /* ENABLED (JERRY_ES2015) */
/* Checks whether unmapped arguments are needed. */
#define PARSER_NEEDS_MAPPED_ARGUMENTS(status_flags) \
(((status_flags) & PARSER_ARGUMENTS_RELATED_FLAGS) == PARSER_ARGUMENTS_NEEDED)
/* The maximum of PARSER_CBC_STREAM_PAGE_SIZE is 127. */
#define PARSER_CBC_STREAM_PAGE_SIZE \
((uint32_t) (64 - sizeof (void *)))