SPIRV-Tools/source/diagnostic.h

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// Copyright (c) 2015 The Khronos Group Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and/or associated documentation files (the
// "Materials"), to deal in the Materials without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Materials, and to
// permit persons to whom the Materials are furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Materials.
//
// MODIFICATIONS TO THIS FILE MAY MEAN IT NO LONGER ACCURATELY REFLECTS
// KHRONOS STANDARDS. THE UNMODIFIED, NORMATIVE VERSIONS OF KHRONOS
// SPECIFICATIONS AND HEADER INFORMATION ARE LOCATED AT
// https://www.khronos.org/registry/
//
// THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
// MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
#ifndef LIBSPIRV_DIAGNOSTIC_H_
#define LIBSPIRV_DIAGNOSTIC_H_
#include <libspirv/libspirv.h>
#include <iostream>
#include <sstream>
#include <utility>
class diagnostic_helper {
public:
diagnostic_helper(spv_position_t& position, spv_diagnostic* pDiagnostic)
: position(&position), pDiagnostic(pDiagnostic) {}
diagnostic_helper(spv_position position, spv_diagnostic* pDiagnostic)
: position(position), pDiagnostic(pDiagnostic) {}
~diagnostic_helper() {
*pDiagnostic = spvDiagnosticCreate(position, stream.str().c_str());
}
std::stringstream stream;
private:
spv_position position;
spv_diagnostic* pDiagnostic;
};
// A DiagnosticStream remembers the current position of the input and an error
// code, and captures diagnostic messages via the left-shift operator.
// If the error code is not SPV_FAILED_MATCH, then captured messages are
// emitted during the destructor.
// TODO(awoloszyn): This is very similar to diagnostic_helper, and hides
// the data more easily. Replace diagnostic_helper elsewhere
// eventually.
class DiagnosticStream {
public:
DiagnosticStream(spv_position_t position, spv_diagnostic* pDiagnostic,
spv_result_t error)
: position_(position), pDiagnostic_(pDiagnostic), error_(error) {}
DiagnosticStream(DiagnosticStream&& other)
: stream_(other.stream_.str()),
position_(other.position_),
pDiagnostic_(other.pDiagnostic_),
error_(other.error_) {
// The other object's destructor will emit the text in its stream_
// member if its pDiagnostic_ member is non-null. Prevent that,
// since emitting that text is now the responsibility of *this.
other.pDiagnostic_ = nullptr;
}
~DiagnosticStream();
// Adds the given value to the diagnostic message to be written.
template <typename T>
DiagnosticStream& operator<<(const T& val) {
stream_ << val;
return *this;
}
// Conversion operator to spv_result, returning the error code.
operator spv_result_t() { return error_; }
private:
std::stringstream stream_;
spv_position_t position_;
spv_diagnostic* pDiagnostic_;
spv_result_t error_;
};
#define DIAGNOSTIC \
diagnostic_helper helper(position, pDiagnostic); \
helper.stream
#endif // LIBSPIRV_DIAGNOSTIC_H_