node_modules/gulp-sass/node_modules/node-sass/src/libsass/parser.cpp
// parse +/- and return false if negative
parse +/- and return false if negative
parse + / - and return false if negative
bool Parser::parse_number_prefix()
  {
    bool positive = true;
    while(true) {
      if (lex < block_comment >()) continue;
      if (lex < number_prefix >()) continue;
      if (lex < exactly < '-' > >()) {
        positive = !positive;
        continue;
      }
      break;
    }
    return positive;
  }
bool Parser :: parse_number_prefix ( ) { bool positive = true ; while ( true ) { if ( lex < block_comment > ( ) ) continue ; if ( lex < number_prefix > ( ) ) continue ; if ( lex < exactly < ' ' > > ( ) ) { positive = ! positive ; continue ; } break ; } return positive ; }
parse +/- and return false if negative
parse + / - and return false if negative