kc3-lang/angle/src/compiler/translator/IntermNodePatternMatcher.h

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• Hash : d0bad2c7
  Author :
  Date : 2016-09-09T18:01:16
  

  Split ternary node class from TIntermSelection
  
  Ternary operator nodes are typed parts of expressions, they always
  have two children and the children are also guaranteed to be
  TIntermTyped. "If" selection nodes can't be a part of an expression,
  they can have either one or two children and the children are code
  blocks. Due to all of these differences it makes sense to store these
  using two different AST node classes.
  
  BUG=angleproject:1490
  TEST=angle_unittests
  
  Change-Id: I913ab1d806e3cdb5c21106f078cc9c0b6c72ac54
  Reviewed-on: https://chromium-review.googlesource.com/384512
  Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  

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• src/compiler/translator/IntermNodePatternMatcher.h

• //
  // Copyright (c) 2016 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.
  //
  // IntermNodePatternMatcher is a helper class for matching node trees to given patterns.
  // It can be used whenever the same checks for certain node structures are common to multiple AST
  // traversers.
  //
  
  #ifndef COMPILER_TRANSLATOR_INTERMNODEPATTERNMATCHER_H_
  #define COMPILER_TRANSLATOR_INTERMNODEPATTERNMATCHER_H_
  
  class TIntermAggregate;
  class TIntermBinary;
  class TIntermNode;
  class TIntermTernary;
  
  class IntermNodePatternMatcher
  {
    public:
      static bool IsDynamicIndexingOfVectorOrMatrix(TIntermBinary *node);
  
      enum PatternType
      {
          // Matches expressions that are unfolded to if statements by UnfoldShortCircuitToIf
          kUnfoldedShortCircuitExpression = 0x0001,
  
          // Matches expressions that return arrays with the exception of simple statements where a
          // constructor or function call result is assigned.
          kExpressionReturningArray = 0x0002,
  
          // Matches dynamic indexing of vectors or matrices in l-values.
          kDynamicIndexingOfVectorOrMatrixInLValue = 0x0004
      };
      IntermNodePatternMatcher(const unsigned int mask);
  
      bool match(TIntermBinary *node, TIntermNode *parentNode);
  
      // Use this version for checking binary node matches in case you're using flag
      // kDynamicIndexingOfVectorOrMatrixInLValue.
      bool match(TIntermBinary *node, TIntermNode *parentNode, bool isLValueRequiredHere);
  
      bool match(TIntermAggregate *node, TIntermNode *parentNode);
      bool match(TIntermTernary *node);
  
    private:
      const unsigned int mMask;
  
      bool matchInternal(TIntermBinary *node, TIntermNode *parentNode);
  };
  
  #endif
  

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