WebSVN – QNX 8.QNX8 LLVM/Clang compiler suite – Blame – //llvm-build/x86_64/include/clang/Tooling/Refactoring/RefactoringActionRuleRequirements.h

Rev	Author	Line No.	Line
14	pmbaty	1	//===--- RefactoringActionRuleRequirements.h - Clang refactoring library --===//
		2	//
		3	// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
		4	// See https://llvm.org/LICENSE.txt for license information.
		5	// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
		6	//
		7	//===----------------------------------------------------------------------===//
		8
		9	#ifndef LLVM_CLANG_TOOLING_REFACTORING_REFACTORINGACTIONRULEREQUIREMENTS_H
		10	#define LLVM_CLANG_TOOLING_REFACTORING_REFACTORINGACTIONRULEREQUIREMENTS_H
		11
		12	#include "clang/Basic/LLVM.h"
		13	#include "clang/Tooling/Refactoring/ASTSelection.h"
		14	#include "clang/Tooling/Refactoring/RefactoringDiagnostic.h"
		15	#include "clang/Tooling/Refactoring/RefactoringOption.h"
		16	#include "clang/Tooling/Refactoring/RefactoringRuleContext.h"
		17	#include "llvm/Support/Error.h"
		18	#include <type_traits>
		19
		20	namespace clang {
		21	namespace tooling {
		22
		23	/// A refactoring action rule requirement determines when a refactoring action
		24	/// rule can be invoked. The rule can be invoked only when all of the
		25	/// requirements are satisfied.
		26	///
		27	/// Subclasses must implement the
		28	/// 'Expected<T> evaluate(RefactoringRuleContext &) const' member function.
		29	/// \c T is used to determine the return type that is passed to the
		30	/// refactoring rule's constructor.
		31	/// For example, the \c SourceRangeSelectionRequirement subclass defines
		32	/// 'Expected<SourceRange> evaluate(RefactoringRuleContext &Context) const'
		33	/// function. When this function returns a non-error value, the resulting
		34	/// source range is passed to the specific refactoring action rule
		35	/// constructor (provided all other requirements are satisfied).
		36	class RefactoringActionRuleRequirement {
		37	// Expected<T> evaluate(RefactoringRuleContext &Context) const;
		38	};
		39
		40	/// A base class for any requirement that expects some part of the source to be
		41	/// selected in an editor (or the refactoring tool with the -selection option).
		42	class SourceSelectionRequirement : public RefactoringActionRuleRequirement {};
		43
		44	/// A selection requirement that is satisfied when any portion of the source
		45	/// text is selected.
		46	class SourceRangeSelectionRequirement : public SourceSelectionRequirement {
		47	public:
		48	Expected<SourceRange> evaluate(RefactoringRuleContext &Context) const {
		49	if (Context.getSelectionRange().isValid())
		50	return Context.getSelectionRange();
		51	return Context.createDiagnosticError(diag::err_refactor_no_selection);
		52	}
		53	};
		54
		55	/// An AST selection requirement is satisfied when any portion of the AST
		56	/// overlaps with the selection range.
		57	///
		58	/// The requirement will be evaluated only once during the initiation and
		59	/// search of matching refactoring action rules.
		60	class ASTSelectionRequirement : public SourceRangeSelectionRequirement {
		61	public:
		62	Expected<SelectedASTNode> evaluate(RefactoringRuleContext &Context) const;
		63	};
		64
		65	/// A selection requirement that is satisfied when the selection range overlaps
		66	/// with a number of neighbouring statements in the AST. The statemenst must be
		67	/// contained in declaration like a function. The selection range must be a
		68	/// non-empty source selection (i.e. cursors won't be accepted).
		69	///
		70	/// The requirement will be evaluated only once during the initiation and search
		71	/// of matching refactoring action rules.
		72	///
		73	/// \see CodeRangeASTSelection
		74	class CodeRangeASTSelectionRequirement : public ASTSelectionRequirement {
		75	public:
		76	Expected<CodeRangeASTSelection>
		77	evaluate(RefactoringRuleContext &Context) const;
		78	};
		79
		80	/// A base class for any requirement that requires some refactoring options.
		81	class RefactoringOptionsRequirement : public RefactoringActionRuleRequirement {
		82	public:
		83	virtual ~RefactoringOptionsRequirement() {}
		84
		85	/// Returns the set of refactoring options that are used when evaluating this
		86	/// requirement.
		87	virtual ArrayRef<std::shared_ptr<RefactoringOption>>
		88	getRefactoringOptions() const = 0;
		89	};
		90
		91	/// A requirement that evaluates to the value of the given \c OptionType when
		92	/// the \c OptionType is a required option. When the \c OptionType is an
		93	/// optional option, the requirement will evaluate to \c None if the option is
		94	/// not specified or to an appropriate value otherwise.
		95	template <typename OptionType>
		96	class OptionRequirement : public RefactoringOptionsRequirement {
		97	public:
		98	OptionRequirement() : Opt(createRefactoringOption<OptionType>()) {}
		99
		100	ArrayRef<std::shared_ptr<RefactoringOption>>
		101	getRefactoringOptions() const final {
		102	return Opt;
		103	}
		104
		105	Expected<typename OptionType::ValueType>
		106	evaluate(RefactoringRuleContext &) const {
		107	return static_cast<OptionType *>(Opt.get())->getValue();
		108	}
		109
		110	private:
		111	/// The partially-owned option.
		112	///
		113	/// The ownership of the option is shared among the different requirements
		114	/// because the same option can be used by multiple rules in one refactoring
		115	/// action.
		116	std::shared_ptr<RefactoringOption> Opt;
		117	};
		118
		119	} // end namespace tooling
		120	} // end namespace clang
		121
		122	#endif // LLVM_CLANG_TOOLING_REFACTORING_REFACTORINGACTIONRULEREQUIREMENTS_H

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QNX 8.QNX8 LLVM/Clang compiler suite//llvm-build/x86_64/include/clang/Tooling/Refactoring/RefactoringActionRuleRequirements.h – Rev 14