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Fix "Invalid prefix operation" errors (#4577)

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`--(-a);` returned with a postfix error before this patch.
The changes introduce a new warning for prefix errors, and
returns with the corresponding one based on current opcode.

JerryScript-DCO-1.0-Signed-off-by: Bela Toth tbela@inf.u-szeged.hu
This commit is contained in:
Tóth Béla 2021-02-08 16:13:37 +01:00 committed by GitHub
parent b1f73e698a
commit 35ecf4c4a3
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 13 additions and 1 deletions
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9
jerry-core/parser/js/js-parser-expr.c
View File

@ -302,7 +302,14 @@ parser_emit_unary_lvalue_opcode (parser_context_t *context_p, /**< context */
#if JERRY_ESNEXT
parser_check_invalid_new_target (context_p, opcode);
parser_raise_error (context_p, PARSER_ERR_INVALID_LHS_POSTFIX_OP);
if (opcode == CBC_PRE_INCR || opcode == CBC_PRE_DECR)
{
parser_raise_error (context_p, PARSER_ERR_INVALID_LHS_PREFIX_OP);
}
else
{
parser_raise_error (context_p, PARSER_ERR_INVALID_LHS_POSTFIX_OP);
}
#else /* JERRY_ESNEXT */
parser_emit_cbc_ext (context_p, CBC_EXT_THROW_REFERENCE_ERROR);
#endif /* JERRY_ESNEXT */

4
jerry-core/parser/js/js-parser-util.c
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@ -1110,6 +1110,10 @@ parser_error_to_string (parser_error_t error) /**< error code */
{
return "Invalid left-hand side expression in postfix operation";
}
case PARSER_ERR_INVALID_LHS_PREFIX_OP:
{
return "Invalid left-hand side expression in prefix operation";
}
case PARSER_ERR_INVALID_LHS_FOR_LOOP:
{
return "Invalid left-hand-side in for-loop";

1
jerry-core/parser/js/js-parser.h
View File

@ -94,6 +94,7 @@ typedef enum
PARSER_ERR_DUPLICATED_PROTO, /**< duplicated __proto__ fields are not allowed */
PARSER_ERR_INVALID_LHS_ASSIGNMENT, /**< invalid LeftHandSide in assignment */
PARSER_ERR_INVALID_LHS_POSTFIX_OP, /**< invalid LeftHandSide expression in postfix operation */
PARSER_ERR_INVALID_LHS_PREFIX_OP, /**< invalid LeftHandSide expression in prefix operation */
PARSER_ERR_INVALID_LHS_FOR_LOOP, /**< invalid LeftHandSide in for-loop */
#endif /* JERRY_ESNEXT */
PARSER_ERR_DELETE_IDENT_NOT_ALLOWED, /**< identifier delete is not allowed in strict mode */