fun is_same_instance(other: nullable Object): Bool is intern
# Have `self` and `other` the same value?
- ##
+ #
# The exact meaning of "same value" is let to the subclasses.
# Implicitly, the default implementation, is `is_same_instance`
fun ==(other: nullable Object): Bool do return self.is_same_instance(other)
# Have `self` and `other` different values?
- ##
+ #
# != is equivalent with "not ==".
fun !=(other: nullable Object): Bool do return not (self == other)
# The hash code of the object.
# Assuming that a == b -> a.hash == b.hash
- ##
+ #
# Without redefinition, it is based on the `object_id` of the instance.
fun hash: Int do return object_id / 8
end
# Native Booleans.
# `true` and `false` are the only instances.
+#
# Boolean are manipulated trough three special operators:
-# `and`, `or`, `not`.
+# `and`, `or`, `not`.
+#
# Booleans are mainly used by conditional statement and loops.
universal Bool
redef fun object_id is intern
# The character whose ASCII value is `self`.
#
- # assert 65.ascii == 'A'
- # assert 10.ascii == '\n'
+ # assert 65.ascii == 'A'
+ # assert 10.ascii == '\n'
fun ascii: Char is intern
# Number of digits of an integer in base `b` (plus one if negative)
fun address_is_null: Bool is extern "address_is_null"
# Free the memory pointed by this pointer
- fun free `{ free(recv); `}
+ fun free is extern "free"
end