diff options
author | Alex Lorenz <arphaman@gmail.com> | 2017-08-25 15:48:00 +0000 |
---|---|---|
committer | Alex Lorenz <arphaman@gmail.com> | 2017-08-25 15:48:00 +0000 |
commit | 494ef6fbebeba1d68dab968806e2e7adfd2788ec (patch) | |
tree | 9e085b6716bb9bae6791ce171187e5ad4377d9f8 /include/clang/Basic/DiagnosticError.h | |
parent | 59be67ffd0b5894009ed82658eab7c91792114f5 (diff) |
[Basic] Add a DiagnosticError llvm::ErrorInfo subclass
Clang's DiagnosticError is an llvm::Error payload that stores a partial
diagnostic and its location. I'll be using it in the refactoring engine.
Differential Revision: https://reviews.llvm.org/D36969
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@311778 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/clang/Basic/DiagnosticError.h')
-rw-r--r-- | include/clang/Basic/DiagnosticError.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/include/clang/Basic/DiagnosticError.h b/include/clang/Basic/DiagnosticError.h new file mode 100644 index 0000000000..6b4b073736 --- /dev/null +++ b/include/clang/Basic/DiagnosticError.h @@ -0,0 +1,61 @@ +//===--- DiagnosticError.h - Diagnostic payload for llvm::Error -*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_CLANG_BASIC_DIAGNOSTIC_ERROR_H +#define LLVM_CLANG_BASIC_DIAGNOSTIC_ERROR_H + +#include "clang/Basic/PartialDiagnostic.h" +#include "llvm/Support/Error.h" + +namespace clang { + +/// \brief 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 none if the given error is not + /// a \c DiagnosticError. + static Optional<PartialDiagnosticAt> take(llvm::Error &Err) { + 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_DIAGNOSTIC_ERROR_H |