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//===---------- ExprMutationAnalyzer.h - clang-tidy -----------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_EXPRMUTATIONANALYZER_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_EXPRMUTATIONANALYZER_H
#include <type_traits>
#include "clang/AST/AST.h"
#include "clang/ASTMatchers/ASTMatchers.h"
#include "llvm/ADT/DenseMap.h"
namespace clang {
namespace tidy {
namespace utils {
/// Analyzes whether any mutative operations are applied to an expression within
/// a given statement.
class ExprMutationAnalyzer {
public:
ExprMutationAnalyzer(const Stmt *Stm, ASTContext *Context)
: Stm(Stm), Context(Context) {}
bool isMutated(const Decl *Dec) { return findDeclMutation(Dec) != nullptr; }
bool isMutated(const Expr *Exp) { return findMutation(Exp) != nullptr; }
const Stmt *findMutation(const Expr *Exp);
private:
bool isUnevaluated(const Expr *Exp);
const Stmt *findExprMutation(ArrayRef<ast_matchers::BoundNodes> Matches);
const Stmt *findDeclMutation(ArrayRef<ast_matchers::BoundNodes> Matches);
const Stmt *findDeclMutation(const Decl *Dec);
const Stmt *findDirectMutation(const Expr *Exp);
const Stmt *findMemberMutation(const Expr *Exp);
const Stmt *findArrayElementMutation(const Expr *Exp);
const Stmt *findCastMutation(const Expr *Exp);
const Stmt *findRangeLoopMutation(const Expr *Exp);
const Stmt *findReferenceMutation(const Expr *Exp);
const Stmt *const Stm;
ASTContext *const Context;
llvm::DenseMap<const Expr *, const Stmt *> Results;
};
} // namespace utils
} // namespace tidy
} // namespace clang
#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_EXPRMUTATIONANALYZER_H
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