lib/standard/text: Added validation and conversion functions for dec/oct and bin

Signed-off-by: Lucas Bajolet <r4pass@hotmail.com>

diff --git a/lib/standard/text/abstract_text.nit b/lib/standard/text/abstract_text.nit
index fe91819..078cc3c 100644 (file)
--- a/lib/standard/text/abstract_text.nit
+++ b/lib/standard/text/abstract_text.nit
@@ -276,6 +276,11 @@ abstract class Text
        #     assert "101101".to_bin == 45
        fun to_bin: Int do return a_to(2)
 
+       # If `self` contains only digits '0' .. '9', return the corresponding integer.
+       #
+       #     assert "108".to_dec == 108
+       fun to_dec: Int do return a_to(10)
+
        # If `self` contains only digits and letters, return the corresponding integer in a given base
        #
        #     assert "120".a_to(3)     == 15
@@ -344,6 +349,33 @@ abstract class Text
                return true
        end
 
+       # Returns `true` if the string contains only Binary digits
+       #
+       #     assert "1101100".is_bin  == true
+       #     assert "1101020".is_bin  == false
+       fun is_bin: Bool do
+               for i in chars do if i != '0' and i != '1' then return false
+               return true
+       end
+
+       # Returns `true` if the string contains only Octal digits
+       #
+       #     assert "213453".is_oct  == true
+       #     assert "781".is_oct     == false
+       fun is_oct: Bool do
+               for i in chars do if i < '0' or i > '7' then return false
+               return true
+       end
+
+       # Returns `true` if the string contains only Decimal digits
+       #
+       #     assert "10839".is_dec == true
+       #     assert "164F".is_dec  == false
+       fun is_dec: Bool do
+               for i in chars do if i < '0' or i > '9' then return false
+               return true
+       end
+
        # Are all letters in `self` upper-case ?
        #
        #     assert "HELLO WORLD".is_upper == true