Supporting more python

knownToBeUnsupported.md

@@ -0,0 +1,32 @@
+# Currently known to be unsupported
+
+## Tuples without parentheses
+The usage of tuples that are not parenthesized is not supported as these causes issues with antlr. (See https://www.geeksforgeeks.org/python/when-are-parentheses-required-around-a-tuple-in-python/ for unparenthesized tuples)
+ We define the rules:
+
+ ```TupleLiteral implements Literal = "(" (VariableInit || ",")* ","? ")" ;```
+ ```SimpleInit implements VariableInit = Expression ;```
+ and ExpressionBasis.mc4 ```LiteralExpression implements Expression <340> = Literal;```
+
+ Thereby without the parentheses we would cause left recursion which is also reachable by ``LiteralStatement implements ClassStatement = Literal STATEMENT_END;```.
+
+## Unicode names
+ Further for now only names with latin letters are permitted, in python another chars are allowed as well, see https://docs.python.org/3/reference/lexical_analysis.html#identifiers. 
+ Prototyping with unicode names have passed the parser tests, further testing needs to be done.
+
+```  @Override
+ token Name =
+            ( UnicodeChar | '_' | '$' )
+            ( UnicodeChar | '_' | '0'..'9' | '$' )*;
+ // Latin,Greek,Coptic,Cyrillic,Armenian
+ fragment token UnicodeChar = 'a'..'z'
+                                  |'A'..'Z'
+                                  |'\u00C0'..'\u00D6'
+                                  |'\u00D8'..'\u00F6'
+                                  |'\u00F8'..'\u02AF'
+                                  |'\u0370'..'\u0373'
+                                  |'\u0376' | '\u0377' | '\u037F' | '\u0386'
+                                  |'\u0386'..'\u03E1'
+                                  |'\u03E2'..'\u0481'
+                                  |'\u048A'..'\u0588';
+```

src/main/grammars/de/monticore/MultilineString.mc4

@@ -5,5 +5,6 @@ package de.monticore;
 // This can be fixed by adding another token, which must be defined before the String token.
 // Thus, this grammar must be used before MCCommonLiterals, which most langauges use.
 component grammar MultilineString {
-  token DoubleQuoteMultilineStringDelimiter = '"' '"' '"';
+  token DoubleQuoteMultilineFStringDelimiter = ('f'|'F') '"' '"' '"';
+  token DoubleQuoteMultilineStringDelimiter =  '"' '"' '"';
 }