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1 //===--- FixItHintUtils.h - clang-tidy---------------------------*- C++ -*-===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_UTILS_FIXITHINTUTILS_H
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10 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_UTILS_FIXITHINTUTILS_H
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11
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12 #include "clang/AST/ASTContext.h"
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13 #include "clang/AST/Decl.h"
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14 #include "clang/Sema/DeclSpec.h"
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15 #include <optional>
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16
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17 namespace clang::tidy::utils::fixit {
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18
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19 /// Creates fix to make ``VarDecl`` a reference by adding ``&``.
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20 FixItHint changeVarDeclToReference(const VarDecl &Var, ASTContext &Context);
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21
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22 /// This enum defines where the qualifier shall be preferably added.
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23 enum class QualifierPolicy {
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24 Left, // Add the qualifier always to the left side, if that is possible.
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25 Right, // Add the qualifier always to the right side.
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26 };
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27
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28 /// This enum defines which entity is the target for adding the qualifier. This
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29 /// makes only a difference for pointer-types. Other types behave identical
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30 /// for either value of \c ConstTarget.
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31 enum class QualifierTarget {
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32 Pointee, /// Transforming a pointer attaches to the pointee and not the
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33 /// pointer itself. For references and normal values this option has
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34 /// no effect. `int * p = &i;` -> `const int * p = &i` or `int const
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35 /// * p = &i`.
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36 Value, /// Transforming pointers will consider the pointer itself.
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37 /// `int * p = &i;` -> `int * const = &i`
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38 };
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39
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40 /// \brief Creates fix to qualify ``VarDecl`` with the specified \c Qualifier.
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41 /// Requires that `Var` is isolated in written code like in `int foo = 42;`.
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42 std::optional<FixItHint>
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43 addQualifierToVarDecl(const VarDecl &Var, const ASTContext &Context,
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44 DeclSpec::TQ Qualifier,
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45 QualifierTarget CT = QualifierTarget::Pointee,
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46 QualifierPolicy CP = QualifierPolicy::Left);
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47
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48 // \brief Format a pointer to an expression
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49 std::string formatDereference(const Expr &ExprNode, const ASTContext &Context);
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50 } // namespace clang::tidy::utils::fixit
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51
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52 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_UTILS_FIXITHINTUTILS_H
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