| //===--- DeclRefExprUtils.h - clang-tidy-------------------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_UTILS_DECLREFEXPRUTILS_H |
| #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_UTILS_DECLREFEXPRUTILS_H |
| |
| #include "clang/AST/ASTContext.h" |
| #include "clang/AST/Type.h" |
| #include "llvm/ADT/SmallPtrSet.h" |
| |
| namespace clang::tidy::utils::decl_ref_expr { |
| |
| /// Returns set of all ``DeclRefExprs`` to ``VarDecl`` within ``Stmt``. |
| llvm::SmallPtrSet<const DeclRefExpr *, 16> |
| allDeclRefExprs(const VarDecl &VarDecl, const Stmt &Stmt, ASTContext &Context); |
| |
| /// Returns set of all ``DeclRefExprs`` to ``VarDecl`` within ``Decl``. |
| llvm::SmallPtrSet<const DeclRefExpr *, 16> |
| allDeclRefExprs(const VarDecl &VarDecl, const Decl &Decl, ASTContext &Context); |
| |
| /// Returns set of all ``DeclRefExprs`` to ``VarDecl`` within ``Stmt`` where |
| /// ``VarDecl`` is guaranteed to be accessed in a const fashion. |
| /// |
| /// If ``VarDecl`` is of pointer type, ``Indirections`` specifies the level |
| /// of indirection of the object whose mutations we are tracking. |
| /// |
| /// For example, given: |
| /// ``` |
| /// int i; |
| /// int* p; |
| /// p = &i; // (A) |
| /// *p = 3; // (B) |
| /// ``` |
| /// |
| /// - `constReferenceDeclRefExprs(P, Stmt, Context, 0)` returns the reference |
| // to `p` in (B): the pointee is modified, but the pointer is not; |
| /// - `constReferenceDeclRefExprs(P, Stmt, Context, 1)` returns the reference |
| // to `p` in (A): the pointee is modified, but the pointer is not; |
| llvm::SmallPtrSet<const DeclRefExpr *, 16> |
| constReferenceDeclRefExprs(const VarDecl &VarDecl, const Stmt &Stmt, |
| ASTContext &Context, int Indirections); |
| |
| /// Returns true if all ``DeclRefExpr`` to the variable within ``Stmt`` |
| /// do not modify it. |
| /// See `constReferenceDeclRefExprs` for the meaning of ``Indirections``. |
| bool isOnlyUsedAsConst(const VarDecl &Var, const Stmt &Stmt, |
| ASTContext &Context, int Indirections); |
| |
| /// Returns ``true`` if ``DeclRefExpr`` is the argument of a copy-constructor |
| /// call expression within ``Decl``. |
| bool isCopyConstructorArgument(const DeclRefExpr &DeclRef, const Decl &Decl, |
| ASTContext &Context); |
| |
| /// Returns ``true`` if ``DeclRefExpr`` is the argument of a copy-assignment |
| /// operator CallExpr within ``Decl``. |
| bool isCopyAssignmentArgument(const DeclRefExpr &DeclRef, const Decl &Decl, |
| ASTContext &Context); |
| |
| } // namespace clang::tidy::utils::decl_ref_expr |
| |
| #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_UTILS_DECLREFEXPRUTILS_H |