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Implement nullish coalescing operator (#3997)

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JerryScript-DCO-1.0-Signed-off-by: bence gabor kis kisbg@inf.u-szeged.hu
This commit is contained in:
kisbg
2020-07-17 15:42:51 +02:00
committed by GitHub
parent f60e16d9d5
commit dfd9d4497a
13 changed files with 323 additions and 72 deletions
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jerry-core/parser/js/js-lexer.h
+27 -24
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@@ -98,31 +98,34 @@ typedef enum
LEXER_ASSIGN_BIT_OR, /**< "|=" (prec: 3) */
LEXER_ASSIGN_BIT_XOR, /**< "^=" (prec: 3) */
LEXER_QUESTION_MARK, /**< "?" (prec: 4) */
LEXER_LOGICAL_OR, /**< "||" (prec: 5) */
LEXER_LOGICAL_AND, /**< "&&" (prec: 6) */
LEXER_BIT_OR, /**< "|" (prec: 7) */
LEXER_BIT_XOR, /**< "^" (prec: 8) */
LEXER_BIT_AND, /**< "&" (prec: 9) */
LEXER_EQUAL, /**< "==" (prec: 10) */
LEXER_NOT_EQUAL, /**< "!=" (prec: 10) */
LEXER_STRICT_EQUAL, /**< "===" (prec: 10) */
LEXER_STRICT_NOT_EQUAL, /**< "!==" (prec: 10) */
LEXER_LESS, /**< "<" (prec: 11) */
LEXER_GREATER, /**< ">" (prec: 11) */
LEXER_LESS_EQUAL, /**< "<=" (prec: 11) */
LEXER_GREATER_EQUAL, /**< ">=" (prec: 11) */
LEXER_KEYW_IN, /**< in (prec: 11) */
LEXER_KEYW_INSTANCEOF, /**< instanceof (prec: 11) */
LEXER_LEFT_SHIFT, /**< "<<" (prec: 12) */
LEXER_RIGHT_SHIFT, /**< ">>" (prec: 12) */
LEXER_UNS_RIGHT_SHIFT, /**< ">>>" (prec: 12) */
LEXER_ADD, /**< "+" (prec: 13) */
LEXER_SUBTRACT, /**< "-" (prec: 13) */
LEXER_MULTIPLY, /**< "*" (prec: 14) */
LEXER_DIVIDE, /**< "/" (prec: 14) */
LEXER_MODULO, /**< "%" (prec: 14) */
#if ENABLED (JERRY_ESNEXT)
LEXER_EXPONENTIATION, /**< "**" (prec: 15) */
LEXER_NULLISH_COALESCING, /**< "??" (prec: 5) */
#endif /* ENABLED (JERRY_ESNEXT) */
LEXER_LOGICAL_OR, /**< "||" (prec: 6) */
LEXER_LOGICAL_AND, /**< "&&" (prec: 7) */
LEXER_BIT_OR, /**< "|" (prec: 8) */
LEXER_BIT_XOR, /**< "^" (prec: 9) */
LEXER_BIT_AND, /**< "&" (prec: 10) */
LEXER_EQUAL, /**< "==" (prec: 11) */
LEXER_NOT_EQUAL, /**< "!=" (prec: 11) */
LEXER_STRICT_EQUAL, /**< "===" (prec: 11) */
LEXER_STRICT_NOT_EQUAL, /**< "!==" (prec: 11) */
LEXER_LESS, /**< "<" (prec: 12) */
LEXER_GREATER, /**< ">" (prec: 12) */
LEXER_LESS_EQUAL, /**< "<=" (prec: 12) */
LEXER_GREATER_EQUAL, /**< ">=" (prec: 12) */
LEXER_KEYW_IN, /**< in (prec: 12) */
LEXER_KEYW_INSTANCEOF, /**< instanceof (prec: 12) */
LEXER_LEFT_SHIFT, /**< "<<" (prec: 13) */
LEXER_RIGHT_SHIFT, /**< ">>" (prec: 13) */
LEXER_UNS_RIGHT_SHIFT, /**< ">>>" (prec: 13) */
LEXER_ADD, /**< "+" (prec: 14) */
LEXER_SUBTRACT, /**< "-" (prec: 14) */
LEXER_MULTIPLY, /**< "*" (prec: 15) */
LEXER_DIVIDE, /**< "/" (prec: 15) */
LEXER_MODULO, /**< "%" (prec: 15) */
#if ENABLED (JERRY_ESNEXT)
LEXER_EXPONENTIATION, /**< "**" (prec: 16) */
#endif /* ENABLED (JERRY_ESNEXT) */
LEXER_LEFT_BRACE, /**< "{" */