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+//
+// Copyright (c) 2002-2015 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#ifndef COMPILER_TRANSLATOR_OPERATOR_H_
+#define COMPILER_TRANSLATOR_OPERATOR_H_
+
+//
+// Operators used by the high-level (parse tree) representation.
+//
+enum TOperator
+{
+    EOpNull,            // if in a node, should only mean a node is still being built
+    EOpFunctionCall,
+    EOpParameters,      // an aggregate listing the parameters to a function
+
+    EOpInvariantDeclaration, // Specialized declarations for attributing invariance
+    EOpPrototype,
+
+    //
+    // Unary operators
+    //
+
+    EOpNegative,
+    EOpPositive,
+    EOpLogicalNot,
+    EOpVectorLogicalNot,
+    EOpBitwiseNot,
+
+    EOpPostIncrement,
+    EOpPostDecrement,
+    EOpPreIncrement,
+    EOpPreDecrement,
+
+    //
+    // binary operations
+    //
+
+    EOpAdd,
+    EOpSub,
+    EOpMul,
+    EOpDiv,
+    EOpIMod,
+    EOpEqual,
+    EOpNotEqual,
+    EOpVectorEqual,
+    EOpVectorNotEqual,
+    EOpLessThan,
+    EOpGreaterThan,
+    EOpLessThanEqual,
+    EOpGreaterThanEqual,
+    EOpComma,
+
+    EOpVectorTimesScalar,
+    EOpVectorTimesMatrix,
+    EOpMatrixTimesVector,
+    EOpMatrixTimesScalar,
+
+    EOpLogicalOr,
+    EOpLogicalXor,
+    EOpLogicalAnd,
+
+    EOpBitShiftLeft,
+    EOpBitShiftRight,
+
+    EOpBitwiseAnd,
+    EOpBitwiseXor,
+    EOpBitwiseOr,
+
+    EOpIndexDirect,
+    EOpIndexIndirect,
+    EOpIndexDirectStruct,
+    EOpIndexDirectInterfaceBlock,
+
+    //
+    // Built-in functions potentially mapped to operators
+    //
+
+    EOpRadians,
+    EOpDegrees,
+    EOpSin,
+    EOpCos,
+    EOpTan,
+    EOpAsin,
+    EOpAcos,
+    EOpAtan,
+
+    EOpSinh,
+    EOpCosh,
+    EOpTanh,
+    EOpAsinh,
+    EOpAcosh,
+    EOpAtanh,
+
+    EOpPow,
+    EOpExp,
+    EOpLog,
+    EOpExp2,
+    EOpLog2,
+    EOpSqrt,
+    EOpInverseSqrt,
+
+    EOpAbs,
+    EOpSign,
+    EOpFloor,
+    EOpTrunc,
+    EOpRound,
+    EOpRoundEven,
+    EOpCeil,
+    EOpFract,
+    EOpMod,
+    EOpModf,
+    EOpMin,
+    EOpMax,
+    EOpClamp,
+    EOpMix,
+    EOpStep,
+    EOpSmoothStep,
+    EOpIsNan,
+    EOpIsInf,
+
+    EOpFloatBitsToInt,
+    EOpFloatBitsToUint,
+    EOpIntBitsToFloat,
+    EOpUintBitsToFloat,
+
+    EOpPackSnorm2x16,
+    EOpPackUnorm2x16,
+    EOpPackHalf2x16,
+    EOpUnpackSnorm2x16,
+    EOpUnpackUnorm2x16,
+    EOpUnpackHalf2x16,
+
+    EOpLength,
+    EOpDistance,
+    EOpDot,
+    EOpCross,
+    EOpNormalize,
+    EOpFaceForward,
+    EOpReflect,
+    EOpRefract,
+
+    EOpDFdx,            // Fragment only, OES_standard_derivatives extension
+    EOpDFdy,            // Fragment only, OES_standard_derivatives extension
+    EOpFwidth,          // Fragment only, OES_standard_derivatives extension
+
+    EOpMatrixTimesMatrix,
+
+    EOpOuterProduct,
+    EOpTranspose,
+    EOpDeterminant,
+    EOpInverse,
+
+    EOpAny,
+    EOpAll,
+
+    //
+    // Branch
+    //
+
+    EOpKill,            // Fragment only
+    EOpReturn,
+    EOpBreak,
+    EOpContinue,
+
+    //
+    // Constructors
+    //
+
+    EOpConstructInt,
+    EOpConstructUInt,
+    EOpConstructBool,
+    EOpConstructFloat,
+    EOpConstructVec2,
+    EOpConstructVec3,
+    EOpConstructVec4,
+    EOpConstructBVec2,
+    EOpConstructBVec3,
+    EOpConstructBVec4,
+    EOpConstructIVec2,
+    EOpConstructIVec3,
+    EOpConstructIVec4,
+    EOpConstructUVec2,
+    EOpConstructUVec3,
+    EOpConstructUVec4,
+    EOpConstructMat2,
+    EOpConstructMat2x3,
+    EOpConstructMat2x4,
+    EOpConstructMat3x2,
+    EOpConstructMat3,
+    EOpConstructMat3x4,
+    EOpConstructMat4x2,
+    EOpConstructMat4x3,
+    EOpConstructMat4,
+    EOpConstructStruct,
+
+    //
+    // moves
+    //
+
+    EOpAssign,
+    EOpInitialize,
+    EOpAddAssign,
+    EOpSubAssign,
+
+    EOpMulAssign,
+    EOpVectorTimesMatrixAssign,
+    EOpVectorTimesScalarAssign,
+    EOpMatrixTimesScalarAssign,
+    EOpMatrixTimesMatrixAssign,
+
+    EOpDivAssign,
+    EOpIModAssign,
+    EOpBitShiftLeftAssign,
+    EOpBitShiftRightAssign,
+    EOpBitwiseAndAssign,
+    EOpBitwiseXorAssign,
+    EOpBitwiseOrAssign
+};
+
+// Returns the string corresponding to the operator in GLSL
+const char* GetOperatorString(TOperator op);
+
+// Say whether or not a binary or unary operation changes the value of a variable.
+bool IsAssignment(TOperator op);
+
+#endif  // COMPILER_TRANSLATOR_OPERATOR_H_