X-Git-Url: http://nitlanguage.org

diff --git a/lib/core/kernel.nit b/lib/core/kernel.nit
index a8ec1c5..fe45072 100644
--- a/lib/core/kernel.nit
+++ b/lib/core/kernel.nit
@@ -644,12 +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 is intern `{ return (uint32_t)self; `}
 
 	redef fun to_i is intern
 	redef fun to_f is intern
@@ -694,6 +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.
@@ -738,12 +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
@@ -802,7 +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)
 	#
@@ -862,9 +870,9 @@ universal Int
 	do
 		assert self >= 0 and self <= 36 # TODO plan for this
 		if self < 10 then
-			return (self + '0'.ascii).ascii
+			return (self + '0'.code_point).code_point
 		else
-			return (self + ('a'.ascii - 10)).ascii
+			return (self - 10 + 'a'.code_point).code_point
 		end
 	end
 
@@ -873,15 +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.
@@ -906,7 +906,7 @@ universal Char
 			printf("%c", self);
 		}
 	`}
-	redef fun hash do return ascii
+	redef fun hash do return code_point
 	redef fun ==(o) is intern
 	redef fun !=(o) is intern
 
@@ -920,7 +920,7 @@ universal Char
 
 	redef fun distance(c)
 	do
-		var d = self.ascii - c.ascii
+		var d = self.code_point - c.code_point
 		if d >= 0 then
 			return d
 		else
@@ -937,9 +937,9 @@ universal Char
 		if self == '-' then
 			return -1
 		else if is_digit then
-			return self.ascii - '0'.ascii
+			return self.code_point - '0'.code_point
 		else
-			return self.to_lower.ascii - 'a'.ascii + 10
+			return self.to_lower.code_point - 'a'.code_point + 10
 		end
 	end
 
@@ -956,7 +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 ?
 	#
@@ -973,7 +973,7 @@ universal Char
 	fun to_lower: Char
 	do
 		if is_upper then
-			return (ascii + ('a'.distance('A'))).ascii
+			return (code_point + ('a'.distance('A'))).code_point
 		else
 			return self
 		end
@@ -988,7 +988,7 @@ universal Char
 	fun to_upper: Char
 	do
 		if is_lower then
-			return (ascii - ('a'.distance('A'))).ascii
+			return (code_point - ('a'.distance('A'))).code_point
 		else
 			return self
 		end
@@ -1049,7 +1049,7 @@ universal Char
 	#     assert '\t'.is_whitespace == true
 	fun is_whitespace: Bool
 	do
-		var i = ascii
+		var i = code_point
 		return i <= 0x20 or i == 0x7F
 	end
 end
@@ -1062,3 +1062,14 @@ extern class Pointer
 	# Free the memory pointed by this pointer
 	fun free `{ free(self); `}
 end
+
+# Task with a `main` method to be implemented by subclasses
+#
+# This class is provided for compatibility between different parallelization systems.
+# It can be used to run a fragment of code on a different thread and
+# to register a reaction to UI events.
+interface Task
+
+	# Main method of this task
+	fun main do end
+end