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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-scanner-internal.h
+32 -4
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@@ -49,11 +49,27 @@ typedef enum
{
SCANNER_LITERAL_IS_ARG = (1 << 0), /**< literal is argument */
SCANNER_LITERAL_IS_VAR = (1 << 1), /**< literal is var */
#if ENABLED (JERRY_ES2015)
/** literal is a destructured argument binding of a possible arrow function */
SCANNER_LITERAL_IS_ARROW_DESTRUCTURED_ARG = SCANNER_LITERAL_IS_VAR,
#endif /* ENABLED (JERRY_ES2015) */
SCANNER_LITERAL_IS_FUNC = (1 << 2), /**< literal is function */
SCANNER_LITERAL_NO_REG = (1 << 3), /**< literal cannot be stored in register */
#if ENABLED (JERRY_ES2015)
/** a destructured argument binding of a possible arrow function cannot be stored in a register */
SCANNER_LITERAL_ARROW_DESTRUCTURED_ARG_NO_REG = SCANNER_LITERAL_IS_FUNC,
#endif /* ENABLED (JERRY_ES2015) */
SCANNER_LITERAL_NO_REG = (1 << 3), /**< literal cannot be stored in a register */
SCANNER_LITERAL_IS_LET = (1 << 4), /**< literal is let */
#if ENABLED (JERRY_ES2015)
/** literal is a function declared in this block (prevents declaring let/const with the same name) */
SCANNER_LITERAL_IS_FUNC_DECLARATION = SCANNER_LITERAL_IS_LET,
#endif /* ENABLED (JERRY_ES2015) */
SCANNER_LITERAL_IS_CONST = (1 << 5), /**< literal is const */
#if ENABLED (JERRY_ES2015)
/** literal is a destructured argument binding */
SCANNER_LITERAL_IS_DESTRUCTURED_ARG = SCANNER_LITERAL_IS_CONST,
/** literal is a local function */
SCANNER_LITERAL_IS_FUNC_LOCAL = SCANNER_LITERAL_IS_CONST,
SCANNER_LITERAL_IS_USED = (1 << 6), /**< literal is used */
#endif /* ENABLED (JERRY_ES2015) */
} scanner_literal_type_flags_t;
@@ -61,9 +77,18 @@ typedef enum
/*
* 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 : module import on global scope, catch block variable otherwise
* SCANNER_LITERAL_IS_FUNC | SCANNER_LITERAL_IS_FUNC_DECLARATION :
* function declared in this block, might be let or var
* SCANNER_LITERAL_IS_FUNC | SCANNER_LITERAL_IS_FUNC_LOCAL :
* function is visible only in this block
* SCANNER_LITERAL_IS_LOCAL :
* module import on global scope, catch block variable otherwise
* SCANNER_LITERAL_IS_ARG | SCANNER_LITERAL_IS_FUNC :
* a function argument which is reassigned to a function later
* SCANNER_LITERAL_IS_ARG | SCANNER_LITERAL_IS_DESTRUCTURED_ARG :
* destructured binding argument
* SCANNER_LITERAL_IS_ARG | SCANNER_LITERAL_IS_DESTRUCTURED_ARG | SCANNER_LITERAL_IS_FUNC :
* destructured binding argument which is reassigned to a function later
*/
/**
@@ -104,6 +129,8 @@ typedef enum
SCANNER_BINDING_VAR, /**< destructuring var binding */
SCANNER_BINDING_LET, /**< destructuring let binding */
SCANNER_BINDING_CONST, /**< destructuring const binding */
SCANNER_BINDING_ARG, /**< destructuring arg binding */
SCANNER_BINDING_ARROW_ARG, /**< possible destructuring arg binding of an arrow function */
} scanner_binding_type_t;
/**
@@ -222,6 +249,7 @@ void scanner_detect_eval_call (parser_context_t *context_p, scanner_context_t *s
void scanner_push_destructuring_pattern (parser_context_t *context_p, scanner_context_t *scanner_context_p,
uint8_t binding_type, bool is_nested);
void scanner_pop_binding_list (scanner_context_t *scanner_context_p);
void scanner_append_hole (parser_context_t *context_p, scanner_context_t *scanner_context_p);
#endif /* ENABLED (JERRY_ES2015) */
/**