Changelog entry for throw expressions

changelog/throw_expression.dd

@@ -0,0 +1,32 @@
+Throw expression as proposed by DIP 1034 have been implemented
+
+Prior to this release, `throw` was considered as a statement and hence was not
+allowed to appear inside of other expressions. This was cumbersome e.g. when
+wanting to throw an expression from a lambda:
+
+---
+SumType!(int, string) result;
+
+result.match!(
+    (int num)       => writeln("Found ", num),
+    // (string err) => throw new Exception(err)    // expression expected
+    (string err)     { throw new Exception(err); } // ok, introduces an explicit body
+
+);
+---
+
+`throw` is now treated as an expression as specified by DIP 1034 [1], causing
+it to become more flexible and easier to use.
+
+
+---
+SumType!(int, string) result;
+
+result.match!(
+    (int num)    => writeln("Found ", num),
+    (string err) => throw new Exception(err)   // works
+
+);
+---
+
+[1] https://github.com/dlang/DIPs/blob/master/DIPs/accepted/DIP1034.md