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230 lines (191 loc) · 6.27 KB
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/**
*
* @file ConceptConstraintFailureRule.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/template/ITemplateErrorRule.hpp>
#include <vix/cli/errors/CodeFrame.hpp>
#include <filesystem>
#include <iostream>
#include <memory>
#include <optional>
#include <regex>
#include <string>
#include <string_view>
#include <vix/cli/Style.hpp>
using namespace vix::cli::style;
namespace vix::cli::errors::template_rules
{
namespace
{
bool icontains(const std::string &text, const std::string &needle)
{
if (needle.empty())
return true;
auto lower = [](unsigned char c) -> char
{
if (c >= 'A' && c <= 'Z')
return static_cast<char>(c + ('a' - 'A'));
return static_cast<char>(c);
};
if (text.size() < needle.size())
return false;
for (std::size_t i = 0; i + needle.size() <= text.size(); ++i)
{
bool ok = true;
for (std::size_t j = 0; j < needle.size(); ++j)
{
if (lower(static_cast<unsigned char>(text[i + j])) !=
lower(static_cast<unsigned char>(needle[j])))
{
ok = false;
break;
}
}
if (ok)
return true;
}
return false;
}
bool is_system_path(std::string_view path) noexcept
{
return path.find("/usr/include/") != std::string_view::npos ||
path.find("/usr/lib/") != std::string_view::npos ||
path.find("/usr/local/include/") != std::string_view::npos ||
path.find("/usr/local/lib/") != std::string_view::npos ||
path.find("/lib/") != std::string_view::npos ||
path.find("/lib64/") != std::string_view::npos;
}
bool is_user_path(std::string_view path) noexcept
{
if (path.empty())
return false;
if (is_system_path(path))
return false;
return path.find(".cpp") != std::string_view::npos ||
path.find(".cc") != std::string_view::npos ||
path.find(".cxx") != std::string_view::npos ||
path.find(".hpp") != std::string_view::npos ||
path.find(".hh") != std::string_view::npos ||
path.find(".h") != std::string_view::npos;
}
vix::cli::errors::CompilerError make_location(
const std::string &file,
int line,
int column,
const std::string &message)
{
vix::cli::errors::CompilerError out;
out.file = file;
out.line = line;
out.column = column > 0 ? column : 1;
out.message = message;
return out;
}
std::optional<vix::cli::errors::CompilerError>
try_extract_first_user_location_from_log(
const std::string &log,
const std::string &message)
{
static const std::regex re(
R"((/[^:\n]+?\.(?:c|cc|cpp|cxx|h|hpp|hh)):(\d+):(\d+))",
std::regex::ECMAScript);
std::smatch match;
std::string::const_iterator it = log.begin();
while (std::regex_search(it, log.cend(), match, re))
{
const std::string file = match[1].str();
const int line = std::stoi(match[2].str());
const int column = std::stoi(match[3].str());
if (is_user_path(file))
return make_location(file, line, column, message);
it = match.suffix().first;
}
return std::nullopt;
}
const std::string &compiler_log_from_context(
const vix::cli::errors::ErrorContext &ctx)
{
return ctx.buildLog;
}
vix::cli::errors::CompilerError best_location(
const vix::cli::errors::CompilerError &err,
const vix::cli::errors::ErrorContext &ctx)
{
const std::string &log = compiler_log_from_context(ctx);
if (auto user_location =
try_extract_first_user_location_from_log(log, err.message))
{
return *user_location;
}
if (is_user_path(err.file))
return err;
return err;
}
void print_hint_and_at(
const vix::cli::errors::CompilerError &location,
const vix::cli::errors::CompilerError &original)
{
std::cerr << YELLOW
<< "hint: "
<< RESET
<< "check the type used at the call site; it does not provide the operation required by this concept"
<< "\n";
if (location.file != original.file)
{
std::cerr << GRAY
<< "note: original compiler location was "
<< original.file << ":" << original.line << ":" << original.column
<< RESET << "\n";
}
std::cerr << GREEN
<< "at: "
<< RESET
<< location.file << ":" << location.line << ":" << location.column
<< "\n";
}
} // namespace
class ConceptConstraintFailureRule final : public ITemplateErrorRule
{
public:
bool match(const vix::cli::errors::CompilerError &err) const override
{
const std::string &message = err.message;
return icontains(message, "constraints not satisfied") ||
icontains(message, "constraint failure") ||
(icontains(message, "concept") &&
icontains(message, "not satisfied")) ||
icontains(message, "requirements not satisfied") ||
icontains(message, "does not satisfy") ||
icontains(message, "failed requirement");
}
bool handle(
const vix::cli::errors::CompilerError &err,
const vix::cli::errors::ErrorContext &ctx) const override
{
const auto location = best_location(err, ctx);
std::cerr << RED
<< "error: concept constraint not satisfied"
<< RESET << "\n";
CodeFrameOptions options;
options.contextLines = 2;
options.maxLineWidth = 120;
options.tabWidth = 4;
printCodeFrame(location, ctx, options);
print_hint_and_at(location, err);
return true;
}
};
std::unique_ptr<ITemplateErrorRule> makeConceptConstraintFailureRule()
{
return std::make_unique<ConceptConstraintFailureRule>();
}
} // namespace vix::cli::errors::template_rules