Seperate types & utils to files

src/utils/str.nim

@@ -1,5 +1,8 @@
 import std/strutils
 import std/math
+import fusion/matching
+
+{.experimental: "caseStmtMacros".}
 
 proc safeDelete*(str: string, slice: Slice[int]): string =
   ## Deletes the items `str[slice]`, ignoring elements out of range.
@@ -25,3 +28,28 @@ func findAndDelete*(str: string, chars: set[char], start = 0, last = str.len - 1
 func deleteAfterNewline*(str: string, start = 0): string =
   ## Delete string after next Newline from `start`.
   findAndDelete(str, Newlines, start)
+
+proc indentAfterNewline*(str: string, count: int): string =
+  ## Indent lines following the first line of `str` by `count`.
+  ## Useful for indenting nested keys of stringify functions.
+  var strDup = str.indent(count)
+  strDup.delete(0..count - 1)
+  strDup
+
+proc prettyExpectedSet*(x: set[char]): string =
+  ## Pretty print value for a set `x` of characters
+  case x:
+    of AllChars:
+      "AllChars {'\x00'..'\xFF'}"
+    of Digits:
+      "Digits {'0'..'9'}"
+    of HexDigits:
+      "HexDigits {'0'..'9', 'A'..'F', 'a'..'f'}"
+    of Letters:
+      "Letters {'A'..'Z', 'a'..'z'}"
+    of Newlines:
+      "Newlines {'\r', '\n'}"
+    of Whitespace:
+      "Whitespace {' ', '\t', '\v', '\r', '\n', '\f'}"
+    else:
+      $x