e75e50c045
The function took either StringRef or Twine. Since string literals are
ambiguous when resolving the overloading, many code calls used this
function with explicit type conversion. That led awkward code like
make_dynamic_error_code(Twine("Error occurred")).
This patch adds a function definition for string literals, so that
you can directly call the function with literals.
llvm-svn: 234841
123 lines
3.5 KiB
C++
123 lines
3.5 KiB
C++
//===- Error.cpp - system_error extensions for lld --------------*- C++ -*-===//
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//
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// The LLVM Linker
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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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#include "lld/Core/Error.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/Support/ErrorHandling.h"
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#include <mutex>
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#include <string>
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#include <vector>
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using namespace lld;
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class _YamlReaderErrorCategory : public std::error_category {
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public:
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const char* name() const LLVM_NOEXCEPT override {
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return "lld.yaml.reader";
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}
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std::string message(int ev) const override {
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switch (static_cast<YamlReaderError>(ev)) {
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case YamlReaderError::success:
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return "Success";
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case YamlReaderError::unknown_keyword:
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return "Unknown keyword found in yaml file";
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case YamlReaderError::illegal_value:
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return "Bad value found in yaml file";
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}
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llvm_unreachable("An enumerator of YamlReaderError does not have a "
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"message defined.");
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}
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};
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const std::error_category &lld::YamlReaderCategory() {
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static _YamlReaderErrorCategory o;
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return o;
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}
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class _LinkerScriptReaderErrorCategory : public std::error_category {
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public:
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const char *name() const LLVM_NOEXCEPT override {
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return "lld.linker-script.reader";
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}
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std::string message(int ev) const override {
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switch (static_cast<LinkerScriptReaderError>(ev)) {
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case LinkerScriptReaderError::success:
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return "Success";
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case LinkerScriptReaderError::parse_error:
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return "Error parsing linker script";
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case LinkerScriptReaderError::unknown_symbol_in_expr:
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return "Unknown symbol found when evaluating linker script expression";
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case LinkerScriptReaderError::unrecognized_function_in_expr:
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return "Unrecognized function call when evaluating linker script "
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"expression";
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}
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llvm_unreachable("An enumerator of LinkerScriptReaderError does not have a "
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"message defined.");
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}
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};
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const std::error_category &lld::LinkerScriptReaderCategory() {
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static _LinkerScriptReaderErrorCategory o;
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return o;
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}
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namespace lld {
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/// Temporary class to enable make_dynamic_error_code() until
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/// llvm::ErrorOr<> is updated to work with error encapsulations
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/// other than error_code.
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class dynamic_error_category : public std::error_category {
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public:
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~dynamic_error_category() LLVM_NOEXCEPT {}
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const char *name() const LLVM_NOEXCEPT override {
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return "lld.dynamic_error";
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}
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std::string message(int ev) const override {
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assert(ev >= 0);
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assert(ev < (int)_messages.size());
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// The value is an index into the string vector.
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return _messages[ev];
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}
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int add(std::string msg) {
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std::lock_guard<std::recursive_mutex> lock(_mutex);
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// Value zero is always the successs value.
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if (_messages.empty())
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_messages.push_back("Success");
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_messages.push_back(msg);
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// Return the index of the string just appended.
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return _messages.size() - 1;
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}
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private:
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std::vector<std::string> _messages;
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std::recursive_mutex _mutex;
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};
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static dynamic_error_category categorySingleton;
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std::error_code make_dynamic_error_code(const char *msg) {
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return make_dynamic_error_code(StringRef(msg));
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}
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std::error_code make_dynamic_error_code(StringRef msg) {
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return std::error_code(categorySingleton.add(msg), categorySingleton);
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}
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std::error_code make_dynamic_error_code(const Twine &msg) {
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return std::error_code(categorySingleton.add(msg.str()), categorySingleton);
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}
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}
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