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Fix the assumption that the stack only has infix operators.

This commit is contained in:
Danila Fedorin 2018-08-10 17:20:14 -07:00
parent 8192d767f2
commit 3c0648e473
1 changed files with 6 additions and 4 deletions
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10
src/parser.c
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@ -1055,11 +1055,13 @@ libab_result _parse_expression(struct parser_state* state,
while (result == LIBAB_SUCCESS && op_stack.tail &&
_parser_match_is_op(op_stack.tail->data)) {
_parser_find_operator_infix(state, op_stack.tail->data,
&other_operator);
libab_lexer_match* other_token = op_stack.tail->data;
if(other_token->type == TOKEN_OP_INFIX) {
_parser_find_operator_infix(state, op_stack.tail->data,
&other_operator);
}
if (((libab_lexer_match*)op_stack.tail->data)->type ==
TOKEN_OP_PREFIX ||
if (other_token->type == TOKEN_OP_PREFIX ||
(operator.associativity == - 1 &&
operator.precedence <= other_operator.precedence) ||
(operator.associativity == 1 &&