Merge remote-tracking branch 'upstream/stable' into merge_stable

std/algorithm/searching.d

@@ -2483,7 +2483,7 @@ Convenience function. Like find, but only returns whether or not the search
 was successful.
 
 See_Also:
-$(LREF among) for checking a value against multiple possibilities.
+$(REF among, std,algorithm,comparison) for checking a value against multiple possibilities.
  +/
 template canFind(alias pred="a == b")
 {

std/math.d

@@ -527,14 +527,20 @@ enum real SQRT1_2 =    SQRT2/2;                               /** $(SQRT)$(HALF)
  * = hypot(z.re, z.im).
  */
 Num abs(Num)(Num x) @safe pure nothrow
-if (is(typeof(Num.init >= 0)) && is(typeof(-Num.init)) &&
+if ((is(typeof(Num.init >= 0)) && is(typeof(-Num.init)) ||
+    (is(Num == short) || is(Num == byte))) &&
     !(is(Num* : const(ifloat*)) || is(Num* : const(idouble*))
     || is(Num* : const(ireal*))))
 {
     static if (isFloatingPoint!(Num))
         return fabs(x);
+    else
+    {
+        static if (is(Num == short) || is(Num == byte))
+            return x >= 0 ? x : cast(Num) -int(x);
         else
             return x >= 0 ? x : -x;
+    }
 }
 
 /// ditto
@@ -566,6 +572,14 @@ if (is(Num* : const(ifloat*)) || is(Num* : const(idouble*))
     assert(abs(-1L+1i) == sqrt(2.0L));
 }
 
+@safe pure nothrow @nogc unittest
+{
+    short s = -8;
+    byte b = -8;
+    assert(abs(s) == 8);
+    assert(abs(b) == 8);
+}
+
 @safe pure nothrow @nogc unittest
 {
     import std.meta : AliasSeq;