Make ~/, round, ceil, floor, truncate return ints. Remove toInt.

sdk/lib/core/num.dart

Index: sdk/lib/core/num.dart
diff --git a/sdk/lib/core/num.dart b/sdk/lib/core/num.dart
index 44bc09a7250b1c14f6bc339da49b601fb5c4b104..29f0d6c6e52615c003cb864f9e78a1a7e009e24e 100644
--- a/sdk/lib/core/num.dart
+++ b/sdk/lib/core/num.dart
@@ -31,7 +31,7 @@ abstract class num implements Comparable {
    */
   // TODO(floitsch): this is currently not true: bignum1 / bignum2 will return
   // NaN, whereas bignum1 ~/ bignum2 will give the correct result.
-  num operator ~/(num other);
+  int operator ~/(num other);
 
   /** Negate operator. */
   num operator -();
@@ -60,25 +60,32 @@ abstract class num implements Comparable {
   /** Returns the absolute value of this [num]. */
   num abs();
 
-  /** Returns the greatest integer value no greater than this [num]. */
-  num floor();
+  /**
+   * Returns the greatest integer no greater than [this] Throws a

[Lasse Reichstein Nielsen, 2013/01/04 10:29:42]

Missing '.'. Two newlines after the '.'.

+   * [FormatException] if [this] cannot be converted.
+   */
+  int floor();
 
-  /** Returns the least integer value that is no smaller than this [num]. */
-  num ceil();
+  /**
+   * Returns the least integer that is no smaller than [this]. Throws a

[Lasse Reichstein Nielsen, 2013/01/04 10:29:42]

Two newlines after '.'.

+   * [FormatException] if [this] cannot be converted.
+   */
+  int ceil();
 
   /**
-   * Returns the integer value closest to this [num].
+   * Returns the integer closest to [this].  Throws a [FormatException] if
+   * [this] cannot be converted.
    *
    * Rounds away from zero when there is no closest integer:
    *  [:(3.5).round() == 4:] and [:(-3.5).round() == -4:].
    */
-  num round();
+  int round();
 
   /**
-   * Returns the integer value obtained by discarding any fractional
-   * digits from this [num].
+   * Returns the integer obtained by discarding any fractional digits from
+   * [this]. Throws a [FormatException] if [this] cannot be converted.
    */
-  num truncate();
+  int truncate();
 
   /**
    * Clamps [this] to be in the range [lowerLimit]-[upperLimit]. The comparison
@@ -87,9 +94,6 @@ abstract class num implements Comparable {
    */
   num clamp(num lowerLimit, num upperLimit);
 
-  /** Truncates this [num] to an integer and returns the result as an [int]. */
-  int toInt();
-
   /**
    * Return this [num] as a [double].
    *