POSITIVE_LOOKAHEAD 5224 src/parser.cc          ASSERT(type == POSITIVE_LOOKAHEAD || type == NEGATIVE_LOOKAHEAD);
POSITIVE_LOOKAHEAD 5225 src/parser.cc          bool is_positive = (type == POSITIVE_LOOKAHEAD);
POSITIVE_LOOKAHEAD 5284 src/parser.cc              type = POSITIVE_LOOKAHEAD;