refs #9880 show index and bound in lots of index out of bounds errors

lib/pure/collections/sharedstrings.nim

@@ -12,6 +12,8 @@
 type
   UncheckedCharArray = UncheckedArray[char]
 
+import system/helpers2
+
 type
   Buffer = ptr object
     refcount: int
@@ -49,11 +51,11 @@ proc len*(s: SharedString): int = s.len
 
 proc `[]`*(s: SharedString; i: Natural): char =
   if i < s.len: result = s.buffer.data[i+s.first]
-  else: raise newException(IndexError, "index out of bounds")
+  else: raise newException(IndexError, formatErrorIndexBound(i, s.len-1))
 
 proc `[]=`*(s: var SharedString; i: Natural; value: char) =
   if i < s.len: s.buffer.data[i+s.first] = value
-  else: raise newException(IndexError, "index out of bounds")
+  else: raise newException(IndexError, formatErrorIndexBound(i, s.len-1))
 
 proc `[]`*(s: SharedString; ab: HSlice[int, int]): SharedString =
   #incRef(src.buffer)

lib/pure/subexes.nim

@@ -17,7 +17,7 @@
 
 from strutils import parseInt, cmpIgnoreStyle, Digits
 include "system/inclrtl"
-
+import system/helpers2
 
 proc findNormalized(x: string, inArray: openarray[string]): int =
   var i = 0
@@ -85,7 +85,7 @@ proc getFormatArg(p: var FormatParser, a: openArray[string]): int =
     result = parseInt(a[result])-1
   else:
     raiseInvalidFormat("'#', '$', number or identifier expected")
-  if result >=% a.len: raiseInvalidFormat("index out of bounds: " & $result)
+  if result >=% a.len: raiseInvalidFormat(formatErrorIndexBound(result, a.len))
   p.i = i
 
 proc scanDollar(p: var FormatParser, a: openarray[string], s: var string) {.