support for single quote strings

Author: marklaw

implementation/main.cpp

@@ -34,7 +34,7 @@ extern FILE* yyin;
 extern bool prediction_task;
 
 std::string usage_str = "ERROR: usage:  FastLAS file_name";
-std::string version_info = R"ESC(FastLAS version 1.0.1.
+std::string version_info = R"ESC(FastLAS version 1.0.4.
 
 For updates and information on FastLAS, please see https://spike-imperial.github.io/FastLAS/.)ESC";
 

implementation/tokens.l

@@ -83,6 +83,11 @@
      yylval.string = new std::string(yylval.string->substr(1, yylval.string->length() - 2));
      return T_STRING;
 }
+\'([^\'\\]|\\.)*\'              {
+     yylval.string = new std::string(yytext, yyleng);
+     yylval.string = new std::string(yylval.string->substr(1, yylval.string->length() - 2));
+     return T_STRING;
+}
 .                       std::cerr << "Unknown token: '" << yytext << "'" << std::endl; exit(1);
 
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