Move colons to the front of symbols in symbol table

[rebcabin]

Consider

./src/bin/lpython -I/Users/brian/Documents/GitHub/lpython/src/runtime/ltypes/ltypes.py --show-asr --no-color ./examples/expr2.py   
(TranslationUnit (SymbolTable 1 {_lpython_main_program: (Function (SymbolTable 4 {}) _lpython_main_program [main0] [] [(SubroutineCall 1 main0 () [] ())] () Source Public Implementation () .false. .false. .false. .false. .false. [] [] .false.), main0: (Function (SymbolTable 2 {x: (Variable 2 x [] Local () () Default (Integer 4 []) Source Public Required .false.)}) main0 [] [] [(= (Var 2 x) (IntegerBinOp (IntegerBinOp (IntegerConstant 2 (Integer 4 [])) Add (IntegerConstant 3 (Integer 4 [])) (Integer 4 []) (IntegerConstant 5 (Integer 4 []))) Mul (IntegerConstant 5 (Integer 4 [])) (Integer 4 []) (IntegerConstant 25 (Integer 4 []))) ()) (Print () [(Var 2 x)] () ())] () Source Public Implementation () .false. .false. .false. .false. .false. [] [] .false.), main_program: (Program (SymbolTable 3 {}) main_program [] [(SubroutineCall 1 _lpython_main_program () [] ())])}) [])

I'm writing some back ends in Clojure. something like _lpython_main_program: is a syntax error in Clojure. If you move the colon to the front :_lpython_main_program, then, magically, ASR becomes valid Clojure, no post-processing needed! Otherwise I have to postprocess the output of --show-asr in non-robust string-hacking in Clojure.

Please consider permanently moving the colons to the front of symbols in --show-asr. You can change one line of code in PickleVisitorVisitor to do this forever.