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//===--- DiagnosticError.h - Diagnostic payload for llvm::Error -*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_BASIC_DIAGNOSTICERROR_H
#define LLVM_CLANG_BASIC_DIAGNOSTICERROR_H
#include "clang/Basic/PartialDiagnostic.h"
#include "llvm/Support/Error.h"
#include <optional>
namespace clang {
/// Carries a Clang diagnostic in an llvm::Error.
///
/// Users should emit the stored diagnostic using the DiagnosticsEngine.
class DiagnosticError : public llvm::ErrorInfo<DiagnosticError> {
public:
DiagnosticError(PartialDiagnosticAt Diag) : Diag(std::move(Diag)) {}
void log(raw_ostream &OS) const override { OS << "clang diagnostic"; }
PartialDiagnosticAt &getDiagnostic() { return Diag; }
const PartialDiagnosticAt &getDiagnostic() const { return Diag; }
/// Creates a new \c DiagnosticError that contains the given diagnostic at
/// the given location.
static llvm::Error create(SourceLocation Loc, PartialDiagnostic Diag) {
return llvm::make_error<DiagnosticError>(
PartialDiagnosticAt(Loc, std::move(Diag)));
}
/// Extracts and returns the diagnostic payload from the given \c Error if
/// the error is a \c DiagnosticError. Returns std::nullopt if the given error
/// is not a \c DiagnosticError.
static std::optional<PartialDiagnosticAt> take(llvm::Error &Err) {
std::optional<PartialDiagnosticAt> Result;
Err = llvm::handleErrors(std::move(Err), [&](DiagnosticError &E) {
Result = std::move(E.getDiagnostic());
});
return Result;
}
static char ID;
private:
// Users are not expected to use error_code.
std::error_code convertToErrorCode() const override {
return llvm::inconvertibleErrorCode();
}
PartialDiagnosticAt Diag;
};
} // end namespace clang
#endif // LLVM_CLANG_BASIC_DIAGNOSTICERROR_H
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