fix issue 17791 - add __traits(deprecated, symbol)

dlang · Oct 3, 2017 · 9e13139 · 9e13139
1 parent 5627785
commit 9e13139
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Showing 3 changed files with 26 additions and 0 deletions.
diff --git a/src/ddmd/id.d b/src/ddmd/id.d
@@ -346,6 +346,7 @@ immutable Msgtable[] msgtable =
     { "isFinalClass" },
     { "isTemplate" },
     { "isPOD" },
+    { "isDeprecated" },
     { "isNested" },
     { "isFloating" },
     { "isIntegral" },

diff --git a/src/ddmd/traits.d b/src/ddmd/traits.d
@@ -66,6 +66,7 @@ shared static this()
         "isAbstractClass",
         "isArithmetic",
         "isAssociativeArray",
+        "isDeprecated",
         "isFinalClass",
         "isPOD",
         "isNested",
@@ -465,6 +466,10 @@ extern (C++) Expression semanticTraits(TraitsExp e, Scope* sc)
     {
         return isTypeX(t => t.toBasetype().ty == Taarray);
     }
+    if (e.ident == Id.isDeprecated)
+    {
+      return isDsymX(t => t.isDeprecated());
+    }
     if (e.ident == Id.isStaticArray)
     {
         return isTypeX(t => t.toBasetype().ty == Tsarray);

diff --git a/test/compilable/test17791.d b/test/compilable/test17791.d
@@ -0,0 +1,20 @@
+deprecated("A deprecated class") {
+class DepClass
+{
+}
+}
+
+class NewClass
+{
+}
+
+void main()
+{
+    // test that a symbol (which is not likely to be deprecated)
+    // is not depercated
+    static assert(!__traits(isDeprecated, int));
+    // check that a class marked deprecated "isDeprecated"
+    static assert(__traits(isDeprecated, DepClass));
+    // check that a class not marked deprecated is not deprecated
+    static assert(!__traits(isDeprecated, NewClass));
+}