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132 lines (107 loc) · 3.09 KB
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/**
*
* @file UseAfterMoveRule.cpp
* @author Gaspard Kirira
*
* Copyright 2025, Gaspard Kirira. All rights reserved.
* https://github.com/vixcpp/vix
* Use of this source code is governed by a MIT license
* that can be found in the License file.
*
* Vix.cpp
*
*/
#include <vix/cli/errors/IErrorRule.hpp>
#include <vix/cli/errors/CodeFrame.hpp>
#if defined(__GNUC__) && !defined(__clang__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
#include <regex>
#if defined(__GNUC__) && !defined(__clang__)
#pragma GCC diagnostic pop
#endif
#include <algorithm>
#include <cctype>
#include <iostream>
#include <memory>
#include <string>
#include <vix/cli/Style.hpp>
using namespace vix::cli::style;
namespace vix::cli::errors
{
namespace
{
std::string to_lower_ascii(std::string text)
{
std::transform(
text.begin(),
text.end(),
text.begin(),
[](unsigned char c)
{
return static_cast<char>(std::tolower(c));
});
return text;
}
std::string extract_moved_variable(const std::string &message)
{
{
const std::regex re(R"(use of '([^']+)' after it was moved)");
std::smatch match;
if (std::regex_search(message, match, re) && match.size() >= 2)
return match[1].str();
}
{
const std::regex re(R"(use of moved-from variable '([^']+)')");
std::smatch match;
if (std::regex_search(message, match, re) && match.size() >= 2)
return match[1].str();
}
return "object";
}
} // namespace
class UseAfterMoveRule final : public IErrorRule
{
public:
bool match(const CompilerError &err) const override
{
const std::string message = to_lower_ascii(err.message);
const bool afterMoved =
message.find("after it was moved") != std::string::npos;
const bool useOf =
message.find("use of") != std::string::npos;
const bool movedValue =
message.find("use of moved") != std::string::npos ||
message.find("moved-from") != std::string::npos ||
message.find("use-after-move") != std::string::npos;
return (afterMoved && useOf) || movedValue;
}
bool handle(
const CompilerError &err,
const ErrorContext &ctx) const override
{
const std::string variableName =
extract_moved_variable(err.message);
std::cerr << RED
<< "error: use-after-move"
<< RESET << "\n";
printCodeFrame(err, ctx);
std::cerr << YELLOW
<< "hint: "
<< RESET
<< "'" << variableName << "' was moved; reassign it before using it again"
<< "\n";
std::cerr << GREEN
<< "at: "
<< RESET
<< err.file << ":" << err.line << ":" << err.column
<< "\n";
return true;
}
};
std::unique_ptr<IErrorRule> makeUseAfterMoveRule()
{
return std::make_unique<UseAfterMoveRule>();
}
} // namespace vix::cli::errors