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//
// Copyright 2019 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_VALIDATEAST_H_
#define COMPILER_TRANSLATOR_VALIDATEAST_H_
#include "compiler/translator/BaseTypes.h"
#include "compiler/translator/Common.h"
namespace sh
{
class TDiagnostics;
class TIntermNode;
// The following options (stored in Compiler) tell the validator what to validate. Some validations
// are conditional to certain passes.
struct ValidateASTOptions
{
// TODO: add support for the flags marked with TODO. http://anglebug.com/2733
// Check that every node always has only one parent,
bool validateSingleParent = true;
// Check that all symbols reference TVariables that have been declared.
bool validateVariableReferences = true;
// Check that all EOpCallFunctionInAST have their corresponding function definitions in the AST,
// with matching symbol ids. There should also be at least a prototype declaration before the
// function is called.
bool validateFunctionCall = true; // TODO
// Check that there are no null nodes where they are not allowed, for example as children of
// TIntermDeclaration or TIntermBlock.
bool validateNullNodes = true;
// Check that symbols that reference variables have consistent qualifiers and symbol ids with
// the variable declaration. For example, references to function out parameters should be
// EvqOut.
bool validateQualifiers = true; // TODO
// Check that variable declarations that can't have initializers don't have initializers
// (varyings, uniforms for example).
bool validateInitializers = true; // TODO
// Check that there is only one TFunction with each function name referenced in the nodes (no
// two TFunctions with the same name, taking internal/non-internal namespaces into account).
bool validateUniqueFunctions = true; // TODO
// Check that references to structs are matched with the corresponding struct declaration. This
// is only done for references to structs inside other struct or interface blocks declarations,
// as validateVariableReferences already ensures other references to the struct match the
// declaration.
bool validateStructUsage = true;
// Check that expression nodes have the correct type considering their operand(s).
bool validateExpressionTypes = true; // TODO
// If SeparateDeclarations has been run, check for the absence of multi declarations as well.
bool validateMultiDeclarations = false;
};
// Check for errors and output error messages on the context.
// Returns true if there are no errors.
bool ValidateAST(TIntermNode *root, TDiagnostics *diagnostics, const ValidateASTOptions &options);
} // namespace sh
#endif // COMPILER_TRANSLATOR_VALIDATESWITCH_H_
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