feat: add builtin methods

packages/ttsl-lang/src/language/grammar/ttsl.langium

@@ -156,7 +156,7 @@ fragment TslConstantFragment:
     'constant'
     name=ID
     (':' ^type+=TslType ('{' (timespanValueEntries+=TslTimespanValueEntry)* '}' |
-    '=' value=TslExpression ';'?) | '{' ((timespanValueEntries+=TslTimespanValueEntry)* | (^type+=TslType '{' (timespanValueEntries+=TslTimespanValueEntry)* '}')*)'}')
+    '=' value=TslExpression ';'?) | '{' ((timespanValueEntries+=TslTimespanValueEntry) | (^type+=TslType '{' (timespanValueEntries+=TslTimespanValueEntry)* '}'))* '}')
 
 ;
 

packages/ttsl-lang/tests/resources/generation/expressions/literals/generated/tests/generator/literals/gen_input.py

@@ -1,8 +1,8 @@
 # Functions --------------------------------------------------------------------
 
 def test():
-    true
-    false
+    True
+    False
     1
     1
     None

packages/ttsl-lang/tests/resources/generation/modifier/timespan/input.ttsl

@@ -12,9 +12,7 @@ constant myConstant2 {
 }
 
 constant myConstant3 {
-    Int {
-        from 1999-01-01 = 0;
-    }
+    from 1999-01-01: Int = 0;
     String{
         from 2001-01-01 = "a";
         from 2003-01-01 = "b";

packages/ttsl-lang/tests/resources/grammar/modifier/timespan/good.ttsl

@@ -18,7 +18,6 @@ constant test2 {
     String{
         from 2001-01-01 = "a";
     }
-    Int{
-        from 2003-01-01 = 2;
-    }
+
+    from 2003-01-01: Int = 2;
 }

packages/ttsl-lang/tests/resources/typing/declarations/constants/main.ttsl

@@ -10,16 +10,14 @@ constant myConstant2 {
 }
 
 constant myConstant3 {
-    Int {
-        from 1999-01-01 = 0;
-    }
+    from 1999-01-01: Int = 0;
+
     String{
         from 2001-01-01 = "a";
         from 2003-01-01 = "b";
     }
-    Int{
-        from 2004-01-01 = 2;
-    }
+
+    from 2004-01-01: Int = 2;
 }
 
 function myFunction() {