Changeset 795 for trunk/rational/rational.d

Timestamp:

08/28/10 23:24:19 (1 year ago)

Author:

dsimcha

Message:

Add casting to integer.

Files:

• trunk/rational/rational.d (modified) (3 diffs)

trunk/rational/rational.d

@@ -123 +123 @@
- * If you use an arbitrary precision type, it must have the relevant operators
- * overloaded and have value semantics.
- *
- * BUGS:  Casting a Rational instantiated with a user-defined fixed-width
- *        integer type to a floating point type currently doesn't work and may
- *        hang your program in an infinite loop.
- *
- * Examples:
@@ -540 +536 @@
-    }
-
+    /**Casts this to an integer by truncating the fractional part.  Equivalent
+     * to $(D integerPart), and then casting it to type $(D I).
+     */
+    I opCast(I)() if(isIntegerLike!I && is(typeof(cast(I) Int.init))) {
+        return cast(I) integerPart;
+    }
+
-    /**Returns the numerator.*/
-    @property Int num() {
@@ -701 +704 @@
-    assert(intFract.integerPart == 1);
-    assert(intFract.fractionPart == rational(1, 4));
+    assert(cast(long) intFract == 1);
-
-    // Test whether CTFE works for primitive types.  Doesn't work yet.