include _ in primitive string

alib2str/src/primitive/PrimitiveFromStringLexer.cpp

@@ -24,7 +24,7 @@ L0:
 	} else if(character == ' ' || character == '\n' || character == '\t') {
 		token.raw += character;
 		goto L0;
-	} else if((character >= 'a' && character <= 'z') || (character >= 'A' && character <= 'Z')) {
+	} else if((character >= 'a' && character <= 'z') || (character >= 'A' && character <= 'Z') || character == '_' ) {
 		token.type = TokenType::STRING;
 		token.value += character;
 		token.raw += character;
@@ -45,7 +45,7 @@ L1:
 	character = in.get();
 	if(in.eof()) {
 		return token;
-	} else if ( ( character >= 'a' && character <= 'z' ) || ( character >= 'A' && character <= 'Z' ) || ( character >= '0' && character <= '9' ) ) {
+	} else if ( ( character >= 'a' && character <= 'z' ) || ( character >= 'A' && character <= 'Z' ) || character == '_' || ( character >= '0' && character <= '9' ) ) {
 		token.value += character;
 		token.raw += character;
 		goto L1;