1 //
2 // Copyright (c) 2002-2015 The ANGLE Project Authors. All rights reserved.
3 // Use of this source code is governed by a BSD-style license that can be
4 // found in the LICENSE file.
5 //
6 // During parsing, all constant expressions are folded to constant union nodes. The expressions that
7 // have been folded may have had precision qualifiers, which should affect the precision of the
8 // consuming operation. If the folded constant union nodes are written to output as such they won't
9 // have any precision qualifiers, and their effect on the precision of the consuming operation is
10 // lost.
11 //
12 // RecordConstantPrecision is an AST traverser that inspects the precision qualifiers of constants
13 // and hoists the constants outside the containing expression as precision qualified named variables
14 // in case that is required for correct precision propagation.
15 //
16 
17 #ifndef COMPILER_TRANSLATOR_RECORDCONSTANTPRECISION_H_
18 #define COMPILER_TRANSLATOR_RECORDCONSTANTPRECISION_H_
19 
20 namespace sh
21 {
22 class TIntermNode;
23 class TSymbolTable;
24 
25 void RecordConstantPrecision(TIntermNode *root, TSymbolTable *symbolTable);
26 }  // namespace sh
27 
28 #endif  // COMPILER_TRANSLATOR_RECORDCONSTANTPRECISION_H_
29