stringtemplate/ issues...

[kaby76]

stringtemplate/ has a few problems that should be addressed:

• Grammar ST{Parser,Lexer}.g4 is a grammar for regular StringTemplate.
• Grammar STG{Parser,Lexer}.g4 is a grammar for StringTemplate group.
• These should be separated into two sub-directories, e.g., follow antlr/antlr{2,3,4}.
• Only ST{Parser,Lexer}.g4 is actually tested on input, and only one test file is provided.
• I don't know what version these grammars are for. It might be best to start from scratch, convert the Antlr3 grammars of StringTemplate using trconvert, and work with that.
• There's no readme.
• Lexunicode.g4 (an include file) is included in LexBasic.g4, but not one rule is used!
• LexBasic.g4 uses a couple of predicates to check Java letter, but it differs from Java/java with JavaLetterOrDigit.
• It places some of the predicates in a lexer base class.