Fix #1081

compiler/ccgtypes.nim

@@ -11,49 +11,10 @@
 
 # ------------------------- Name Mangling --------------------------------
 
-proc mangleField(name: string): string = 
-  case name[0]
-  of 'a'..'z': 
-    result = ""
-    add(result, chr(ord(name[0]) - ord('a') + ord('A')))
-  of '0'..'9', 'A'..'Z': 
-    result = ""
-    add(result, name[0])
-  else: result = "HEX" & toHex(ord(name[0]), 2)
-  for i in countup(1, len(name) - 1): 
-    case name[i]
-    of 'A'..'Z': 
-      add(result, chr(ord(name[i]) - ord('A') + ord('a')))
-    of '_': 
-      discard
-    of 'a'..'z', '0'..'9': 
-      add(result, name[i])
-    else: 
-      add(result, "HEX")
-      add(result, toHex(ord(name[i]), 2))
-
-proc mangle(name: string): string = 
-  when false:
-    case name[0]
-    of 'a'..'z': 
-      result = ""
-      add(result, chr(ord(name[0]) - ord('a') + ord('A')))
-    of '0'..'9', 'A'..'Z': 
-      result = ""
-      add(result, name[0])
-    else: result = "HEX" & toHex(ord(name[0]), 2)
-  result = ""
-  for i in countup(0, len(name) - 1): 
-    case name[i]
-    of 'A'..'Z': 
-      add(result, chr(ord(name[i]) - ord('A') + ord('a')))
-    of '_': 
-      discard
-    of 'a'..'z', '0'..'9': 
-      add(result, name[i])
-    else: 
-      add(result, "HEX")
-      add(result, toHex(ord(name[i]), 2))
+proc mangleField(name: string): string =
+  result = mangle(name)
+  if name[0] in 'a'..'z':
+    result[0] = name[0].toUpper
 
 proc isKeyword(w: PIdent): bool =
   # nimrod and C++ share some keywords

compiler/ccgutils.nim

@@ -161,6 +161,27 @@ proc makeSingleLineCString*(s: string): string =
     result.add(c.toCChar)
   result.add('\"')
 
+proc mangle*(name: string): string =
+  result = ""
+  case name[0]
+  of Letters:
+    result.add(name[0].toLower)
+  of Digits:
+    result.add("N" & name[0])
+  else:
+    result = "HEX" & toHex(ord(name[0]), 2)
+  for i in 1..(name.len-1):
+    let c = name[i]
+    case c
+    of 'A'..'Z':
+      add(result, c.toLower)
+    of '_':
+      discard
+    of 'a'..'z', '0'..'9':
+      add(result, c)
+    else:
+      add(result, "HEX" & toHex(ord(c), 2))
+
 proc makeLLVMString*(s: string): PRope = 
   const MaxLineLength = 64
   result = nil

compiler/jsgen.nim

@@ -136,18 +136,6 @@ proc mapType(typ: PType): TJSTypeKind =
   of tyProc: result = etyProc
   of tyCString: result = etyString
 
-proc mangle(name: string): string = 
-  result = ""
-  for i in countup(0, len(name) - 1): 
-    case name[i]
-    of 'A'..'Z': 
-      add(result, chr(ord(name[i]) - ord('A') + ord('a')))
-    of '_': 
-      discard
-    of 'a'..'z', '0'..'9': 
-      add(result, name[i])
-    else: add(result, 'X' & toHex(ord(name[i]), 2))
-
 proc mangleName(s: PSym): PRope = 
   result = s.loc.r
   if result == nil: 

tests/ccgbugs/tbug1081.nim

@@ -0,0 +1,17 @@
+discard """
+  output: '''1
+0
+0
+0'''
+"""
+
+proc `1/1`() = echo(1 div 1)
+template `1/2`() = echo(1 div 2)
+var `1/3` = 1 div 4
+`1/3` = 1 div 3 # oops, 1/3!=1/4
+let `1/4` = 1 div 4
+
+`1/1`()
+`1/2`()
+echo `1/3`
+echo `1/4`