1 files changed, 23 insertions, 24 deletions
diff --git a/lib/system/repr_v2.nim b/lib/system/repr_v2.nim
index f6c720e2c..d2aef536c 100644
--- a/lib/system/repr_v2.nim
+++ b/lib/system/repr_v2.nim
@@ -9,6 +9,9 @@ proc isNamedTuple(T: typedesc): bool {.magic: "TypeTrait".}
 proc distinctBase(T: typedesc, recursive: static bool = true): typedesc {.magic: "TypeTrait".}
   ## imported from typetraits
 
+proc rangeBase(T: typedesc): typedesc {.magic: "TypeTrait".}
+  # skip one level of range; return the base type of a range type
+
 proc repr*(x: NimNode): string {.magic: "Repr", noSideEffect.}
 
 proc repr*(x: int): string =
@@ -35,9 +38,10 @@ proc repr*(x: char): string {.noSideEffect, raises: [].} =
   ## repr for a character argument. Returns `x`
   ## converted to an escaped string.
   ##
-  ## .. code-block:: Nim
+  ##   ```Nim
   ##   assert repr('c') == "'c'"
-  result.add '\''
+  ##   ```
+  result = "'"
   # Elides string creations if not needed
   if x in {'\\', '\0'..'\31', '\127'..'\255'}:
     result.add '\\'
@@ -50,7 +54,7 @@ proc repr*(x: char): string {.noSideEffect, raises: [].} =
 proc repr*(x: string | cstring): string {.noSideEffect, raises: [].} =
   ## repr for a string argument. Returns `x`
   ## converted to a quoted and escaped string.
-  result.add '\"'
+  result = "\""
   for i in 0..<x.len:
     if x[i] in {'"', '\\', '\0'..'\31', '\127'..'\255'}:
       result.add '\\'
@@ -91,12 +95,17 @@ proc repr*(p: pointer): string =
         result[j] = HexChars[n and 0xF]
         n = n shr 4
 
-proc repr*(p: proc): string =
+proc repr*(p: proc | iterator {.closure.}): string =
   ## repr of a proc as its address
   repr(cast[ptr pointer](unsafeAddr p)[])
 
-template repr*(x: distinct): string =
-  repr(distinctBase(typeof(x))(x))
+template repr*[T: distinct|(range and not enum)](x: T): string =
+  when T is range: # add a branch to handle range
+    repr(rangeBase(typeof(x))(x))
+  elif T is distinct:
+    repr(distinctBase(typeof(x))(x))
+  else:
+    {.error: "cannot happen".}
 
 template repr*(t: typedesc): string = $t
 
@@ -124,11 +133,11 @@ proc reprObject[T: tuple|object](res: var string, x: T) {.noSideEffect, raises:
 proc repr*[T: tuple|object](x: T): string {.noSideEffect, raises: [].} =
   ## Generic `repr` operator for tuples that is lifted from the components
   ## of `x`. Example:
-  ##
-  ## .. code-block:: Nim
+  ##   ```Nim
   ##   $(23, 45) == "(23, 45)"
   ##   $(a: 23, b: 45) == "(a: 23, b: 45)"
   ##   $() == "()"
+  ##   ```
   when T is object:
     result = $typeof(x)
   reprObject(result, x)
@@ -156,29 +165,19 @@ proc collectionToRepr[T](x: T, prefix, separator, suffix: string): string {.noSi
 proc repr*[T](x: set[T]): string =
   ## Generic `repr` operator for sets that is lifted from the components
   ## of `x`. Example:
-  ##
-  ## .. code-block:: Nim
+  ##   ```Nim
   ##   ${23, 45} == "{23, 45}"
+  ##   ```
   collectionToRepr(x, "{", ", ", "}")
 
 proc repr*[T](x: seq[T]): string =
   ## Generic `repr` operator for seqs that is lifted from the components
   ## of `x`. Example:
-  ##
-  ## .. code-block:: Nim
+  ##   ```Nim
   ##   $(@[23, 45]) == "@[23, 45]"
+  ##   ```
   collectionToRepr(x, "@[", ", ", "]")
 
-proc repr*[T, U](x: HSlice[T, U]): string =
-  ## Generic `repr` operator for slices that is lifted from the components
-  ## of `x`. Example:
-  ##
-  ## .. code-block:: Nim
-  ##  $(1 .. 5) == "1 .. 5"
-  result = repr(x.a)
-  result.add(" .. ")
-  result.add(repr(x.b))
-
 proc repr*[T, IDX](x: array[IDX, T]): string =
   ## Generic `repr` operator for arrays that is lifted from the components.
   collectionToRepr(x, "[", ", ", "]")
@@ -186,9 +185,9 @@ proc repr*[T, IDX](x: array[IDX, T]): string =
 proc repr*[T](x: openArray[T]): string =
   ## Generic `repr` operator for openarrays that is lifted from the components
   ## of `x`. Example:
-  ##
-  ## .. code-block:: Nim
+  ##   ```Nim
   ##   $(@[23, 45].toOpenArray(0, 1)) == "[23, 45]"
+  ##   ```
   collectionToRepr(x, "[", ", ", "]")
 
 proc repr*[T](x: UncheckedArray[T]): string =