docuement nim-lang#17208

lib/pure/parseutils.nim

@@ -164,8 +164,10 @@ proc parseHex*[T: SomeInteger](s: string, number: var T, start = 0,
   ## or to the end of the string. Otherwise, no more than ``maxLen`` characters
   ## are parsed starting from the ``start`` position.
   ##
-  ## It does not check for overflow. If the value represented by the string is
-  ## too big to fit into ``number``, only the value of last fitting characters
+  ## .. warning:: It does not check for overflow.
+  ## 
+  ## If the value represented by the string is too big to fit into ``number``, 
+  ## only the value of last fitting characters
   ## will be stored in ``number`` without producing an error.
   runnableExamples:
     var num: int

lib/pure/strutils.nim

@@ -1148,6 +1148,12 @@ func parseHexInt*(s: string): int {.rtl, extern: "nsuParseHexInt".} =
   ## If `s` is not a valid hex integer, `ValueError` is raised. `s` can have one
   ## of the following optional prefixes: `0x`, `0X`, `#`.  Underscores
   ## within `s` are ignored.
+  ## 
+  ## .. warning:: It does not check for overflow.
+  ##
+  ## If the value represented by the string is too big to fit into `int`,
+  ## only the value of last fitting characters
+  ## will be returned without producing an error.
   result = 0
   let L = parseutils.parseHex(s, result, 0)
   if L != s.len or L == 0: