core.demangle: parse struct literal with function literal member as template value argument

Author: BorisCarvajal

src/core/demangle.d

@@ -1469,7 +1469,10 @@ pure @safe:
             foreach ( i; 0 .. n )
             {
                 putComma(i);
-                parseValue();
+                if (front == '_') // function literal symbol
+                    parseMangledName(false, 1);
+                else
+                    parseValue();
             }
             put( ')' );
             return;
@@ -2503,6 +2506,8 @@ else
          "pure @safe int std.format.getNth!(\"integer width\", std.traits.isIntegral, int, uint, uint).getNth(uint, uint, uint)"],
         ["_D3std11parallelism42__T16RoundRobinBufferTDFKAaZvTDxFNaNdNeZbZ16RoundRobinBuffer5primeMFZv",
          "void std.parallelism.RoundRobinBuffer!(void delegate(ref char[]), bool delegate() pure @property @trusted const).RoundRobinBuffer.prime()"],
+        ["_D6mangle__T8fun21753VSQv6S21753S1_DQBi10__lambda71MFNaNbNiNfZvZQCaQp",
+        "void function() pure nothrow @nogc @safe mangle.fun21753!(mangle.S21753(mangle.__lambda71())).fun21753"],
         // Lname '0'
         ["_D3std9algorithm9iteration__T9MapResultSQBmQBlQBe005stripTAAyaZQBi7opSliceMFNaNbNiNfmmZSQDiQDhQDa__TQCtSQDyQDxQDq00QCmTQCjZQDq",
          "pure nothrow @nogc @safe std.algorithm.iteration.MapResult!(std.algorithm.iteration.__anonymous.strip, "