Move hlsl/ source to glslang/HLSL/

Now that the HLSL source files are part of the `glslang` target (#2271), it makes sense for these to sit in the `glslang` directory.

Changed the case of the directory from `hlsl` to `HLSL` to better match the sibling directories.

glslang/HLSL/hlslOpMap.h

@@ -0,0 +1,69 @@
+//
+// Copyright (C) 2016 Google, Inc.
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//    Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//
+//    Redistributions in binary form must reproduce the above
+//    copyright notice, this list of conditions and the following
+//    disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+//    Neither the name of Google, Inc., nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+
+#ifndef HLSLOPMAP_H_
+#define HLSLOPMAP_H_
+
+#include "hlslScanContext.h"
+
+namespace glslang {
+
+    enum PrecedenceLevel {
+        PlBad,
+        PlLogicalOr,
+        PlLogicalXor,
+        PlLogicalAnd,
+        PlBitwiseOr,
+        PlBitwiseXor,
+        PlBitwiseAnd,
+        PlEquality,
+        PlRelational,
+        PlShift,
+        PlAdd,
+        PlMul
+    };
+
+    class HlslOpMap {
+    public:
+        static TOperator assignment(EHlslTokenClass op);
+        static TOperator binary(EHlslTokenClass op);
+        static TOperator preUnary(EHlslTokenClass op);
+        static TOperator postUnary(EHlslTokenClass op);
+        static PrecedenceLevel precedenceLevel(TOperator);
+    };
+
+} // end namespace glslang
+
+#endif // HLSLOPMAP_H_