Merge: Extends chars, string and stream with some whitespace-related function

[nit.git] / lib / standard / kernel.nit

diff --git a/lib/standard/kernel.nit b/lib/standard/kernel.nit
index 21b0fc1..01e72e3 100644 (file)
--- a/lib/standard/kernel.nit
+++ b/lib/standard/kernel.nit
@@ -718,6 +718,22 @@ universal Char
        do
                return is_lower or is_upper
        end
+
+       # Is self a whitespace character?
+       #
+       # These correspond to the "Other" and "Separator" groups of the Unicode.
+       #
+       # In the ASCII encoding, this is those <= to space (0x20) plus delete (0x7F).
+       #
+       #     assert 'A'.is_whitespace  == false
+       #     assert ','.is_whitespace  == false
+       #     assert ' '.is_whitespace  == true
+       #     assert '\t'.is_whitespace == true
+       fun is_whitespace: Bool
+       do
+               var i = ascii
+               return i <= 0x20 or i == 0x7F
+       end
 end
 
 # Pointer classes are used to manipulate extern C structures.