Merge: Added contributing guidelines and link from readme

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

diff --git a/lib/core/kernel.nit b/lib/core/kernel.nit
index 84bd844..fe45072 100644 (file)
--- a/lib/core/kernel.nit
+++ b/lib/core/kernel.nit
@@ -644,17 +644,17 @@ universal Byte
        # `i` bits shift fo the left
        #
        #     assert 5u8 << 1    == 10u8
-       fun <<(i: Int): Byte `{ return self << i; `}
+       fun <<(i: Int): Byte is intern `{ return self << i; `}
 
        # `i` bits shift fo the right
        #
        #     assert 5u8 >> 1    == 2u8
-       fun >>(i: Int): Byte `{ return self >> i; `}
+       fun >>(i: Int): Byte is intern `{ return self >> i; `}
 
        # Returns the character equivalent of `self`
        #
        # REQUIRE: `self <= 127u8`
-       fun ascii: Char `{ return (uint32_t)self; `}
+       fun ascii: Char is intern `{ return (uint32_t)self; `}
 
        redef fun to_i is intern
        redef fun to_f is intern
@@ -699,6 +699,9 @@ universal Byte
                        return self
                end
        end
+
+       # Is `self` an ASCII whitespace ?
+       fun is_whitespace: Bool do return self == 0x7Fu8 or self <= 0x20u8
 end
 
 # Native integer numbers.
@@ -743,12 +746,12 @@ universal Int
        # `i` bits shift fo the left
        #
        #     assert 5 << 1    == 10
-       fun <<(i: Int): Int `{ return self << i; `}
+       fun <<(i: Int): Int is intern `{ return self << i; `}
 
        # `i` bits shift fo the right
        #
        #     assert 5 >> 1    == 2
-       fun >>(i: Int): Int `{ return self >> i; `}
+       fun >>(i: Int): Int is intern `{ return self >> i; `}
 
        redef fun to_i do return self
        redef fun to_f is intern
@@ -807,7 +810,7 @@ universal Int
        #     assert 65.code_point == 'A'
        #     assert 10.code_point == '\n'
        #     assert 0x220B.code_point == '∋'
-       fun code_point: Char `{ return (uint32_t)self; `}
+       fun code_point: Char is intern `{ return (uint32_t)self; `}
 
        # Number of digits of an integer in base `b` (plus one if negative)
        #
@@ -878,15 +881,7 @@ universal Int
        #     assert (-10).abs   == 10
        #     assert 10.abs    == 10
        #     assert 0.abs     == 0
-       fun abs: Int
-       do
-           if self >= 0
-           then
-               return self
-           else
-               return -1 * self
-           end
-       end
+       fun abs: Int do return if self >= 0 then self else -self
 end
 
 # Native characters.
@@ -961,7 +956,7 @@ universal Char
        #     assert 'A'.code_point == 65
        #     assert '\n'.code_point == 10
        #     assert '∋'.code_point == 0x220B
-       fun code_point: Int `{ return (long)self; `}
+       fun code_point: Int is intern `{ return (long)self; `}
 
        # Is `self` an ASCII character ?
        #