Merge pull request #7298 from JinShil/fix16183

Fix Issue 16183 - [REG2.068] compile-time string concatenation fails … merged-on-behalf-of: Walter Bright <WalterBright@users.noreply.github.com>
dlang · Nov 11, 2017 · 12964b3 · 12964b3
2 parents 9b86ddd + 4ae9018
commit 12964b3
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diff --git a/src/ddmd/dcast.d b/src/ddmd/dcast.d
@@ -647,7 +647,8 @@ extern (C++) MATCH implicitConvTo(Expression e, Type t)
                         MATCH m = MATCH.exact;
                         if (e.type.nextOf().mod != tn.mod)
                         {
-                            if (!tn.isConst())
+                            // https://issues.dlang.org/show_bug.cgi?id=16183
+                            if (!tn.isConst() && !tn.isImmutable())
                                 return;
                             m = MATCH.constant;
                         }

diff --git a/test/compilable/test16183.d b/test/compilable/test16183.d
@@ -0,0 +1,7 @@
+// https://issues.dlang.org/show_bug.cgi?id=16183
+
+void main()
+{
+    const string g(const string s) { return s; }
+    enum string y = ['f'] ~ g("g");
+}