first steps to make templates hygienic

compiler/ast.nim

@@ -234,7 +234,7 @@ type
     sfDiscriminant,   # field is a discriminant in a record/object
     sfDeprecated,     # symbol is deprecated
     sfError,          # usage of symbol should trigger a compile-time error
-    sfInnerProc,      # proc is an inner proc
+    sfShadowed,       # a symbol that was shadowed in some inner scope
     sfThread,         # proc will run as a thread
                       # variable is a thread variable
     sfCompileTime,    # proc can be evaluated at compile time
@@ -247,7 +247,7 @@ type
                       # language; for interfacing with Objective C
     sfDiscardable     # returned value may be discarded implicitely
     sfDestructor      # proc is destructor
-    sfByCopy          # a variable is to be captured by value in a closure
+    sfGenSym          # symbol is 'gensym'ed; do not add to symbol table
 
   TSymFlags* = set[TSymFlag]
 
@@ -264,10 +264,7 @@ const
     # symbol name that was generated by the compiler
     # the compiler will avoid printing such names 
     # in user messages.
-  
-  sfShadowed* = sfInnerProc
-    # a variable that was shadowed in some inner scope
-    
+      
   sfHoist* = sfVolatile ## proc return value can be hoisted
 
 const
@@ -785,15 +782,6 @@ const                         # for all kind of hash tables:
   GrowthFactor* = 2           # must be power of 2, > 0
   StartSize* = 8              # must be power of 2, > 0
 
-proc ValueToString*(a: PNode): string = 
-  case a.kind
-  of nkCharLit..nkUInt64Lit: result = $(a.intVal)
-  of nkFloatLit..nkFloat128Lit: result = $(a.floatVal)
-  of nkStrLit..nkTripleStrLit: result = a.strVal
-  else: 
-    InternalError(a.info, "valueToString")
-    result = ""
-
 proc copyStrTable(dest: var TStrTable, src: TStrTable) = 
   dest.counter = src.counter
   if isNil(src.data): return