forked from OSchip/llvm-project
144 lines
4.4 KiB
C++
144 lines
4.4 KiB
C++
//===-- SymbolInfo.h - Symbol Info ------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_TOOLS_EXTRA_INCLUDE_FIXER_FIND_ALL_SYMBOLS_SYMBOLINFO_H
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#define LLVM_CLANG_TOOLS_EXTRA_INCLUDE_FIXER_FIND_ALL_SYMBOLS_SYMBOLINFO_H
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#include "llvm/ADT/Optional.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/YAMLTraits.h"
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#include "llvm/Support/raw_ostream.h"
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#include <set>
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#include <string>
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#include <vector>
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namespace clang {
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namespace find_all_symbols {
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/// \brief Describes a named symbol from a header.
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/// Symbols with the same qualified name and type (e.g. function overloads)
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/// that appear in the same header are represented by a single SymbolInfo.
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///
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/// TODO: keep track of instances, e.g. overload locations and signatures.
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class SymbolInfo {
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public:
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/// \brief The SymbolInfo Type.
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enum class SymbolKind {
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Function,
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Class,
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Variable,
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TypedefName,
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EnumDecl,
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EnumConstantDecl,
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Macro,
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Unknown,
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};
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/// \brief The Context Type.
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enum class ContextType {
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Namespace, // Symbols declared in a namespace.
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Record, // Symbols declared in a class.
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EnumDecl, // Enum constants declared in a enum declaration.
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};
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/// \brief A pair of <ContextType, ContextName>.
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typedef std::pair<ContextType, std::string> Context;
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// \brief Signals are signals gathered by observing how a symbol is used.
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// These are used to rank results.
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struct Signals {
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Signals() {}
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Signals(unsigned Seen, unsigned Used) : Seen(Seen), Used(Used) {}
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// Number of times this symbol was visible to a TU.
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unsigned Seen = 0;
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// Number of times this symbol was referenced a TU's main file.
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unsigned Used = 0;
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Signals &operator+=(const Signals &RHS);
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Signals operator+(const Signals &RHS) const;
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bool operator==(const Signals &RHS) const;
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};
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using SignalMap = std::map<SymbolInfo, Signals>;
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// The default constructor is required by YAML traits in
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// LLVM_YAML_IS_DOCUMENT_LIST_VECTOR.
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SymbolInfo() : Type(SymbolKind::Unknown) {}
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SymbolInfo(llvm::StringRef Name, SymbolKind Type, llvm::StringRef FilePath,
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const std::vector<Context> &Contexts);
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void SetFilePath(llvm::StringRef Path) { FilePath = Path; }
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/// \brief Get symbol name.
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llvm::StringRef getName() const { return Name; }
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/// \brief Get the fully-qualified symbol name.
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std::string getQualifiedName() const;
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/// \brief Get symbol type.
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SymbolKind getSymbolKind() const { return Type; }
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/// \brief Get a relative file path where symbol comes from.
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llvm::StringRef getFilePath() const { return FilePath; }
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/// \brief Get symbol contexts.
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const std::vector<SymbolInfo::Context> &getContexts() const {
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return Contexts;
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}
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bool operator<(const SymbolInfo &Symbol) const;
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bool operator==(const SymbolInfo &Symbol) const;
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private:
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friend struct llvm::yaml::MappingTraits<struct SymbolAndSignals>;
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/// \brief Identifier name.
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std::string Name;
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/// \brief Symbol type.
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SymbolKind Type;
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/// \brief The file path where the symbol comes from. It's a relative file
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/// path based on the build directory.
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std::string FilePath;
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/// \brief Contains information about symbol contexts. Context information is
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/// stored from the inner-most level to outer-most level.
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///
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/// For example, if a symbol 'x' is declared as:
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/// namespace na { namespace nb { class A { int x; } } }
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/// The contexts would be { {RECORD, "A"}, {NAMESPACE, "nb"}, {NAMESPACE,
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/// "na"} }.
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/// The name of an anonymous namespace is "".
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///
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/// If the symbol is declared in `TranslationUnitDecl`, it has no context.
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std::vector<Context> Contexts;
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};
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struct SymbolAndSignals {
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SymbolInfo Symbol;
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SymbolInfo::Signals Signals;
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bool operator==(const SymbolAndSignals& RHS) const;
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};
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/// \brief Write SymbolInfos to a stream (YAML format).
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bool WriteSymbolInfosToStream(llvm::raw_ostream &OS,
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const SymbolInfo::SignalMap &Symbols);
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/// \brief Read SymbolInfos from a YAML document.
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std::vector<SymbolAndSignals> ReadSymbolInfosFromYAML(llvm::StringRef Yaml);
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} // namespace find_all_symbols
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} // namespace clang
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#endif // LLVM_CLANG_TOOLS_EXTRA_INCLUDE_FIXER_FIND_ALL_SYMBOLS_SYMBOLINFO_H
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