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// Copyright 2021 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef SRC_DEBUG_H_
#define SRC_DEBUG_H_
#include <utility>
#include "src/diagnostic/diagnostic.h"
#include "src/diagnostic/formatter.h"
#include "src/diagnostic/printer.h"
namespace tint {
/// Function type used for registering an internal compiler error reporter
using InternalCompilerErrorReporter = void(const diag::List&);
/// Sets the global error reporter to be called in case of internal compiler
/// errors.
/// @param reporter the error reporter
void SetInternalCompilerErrorReporter(InternalCompilerErrorReporter* reporter);
/// InternalCompilerError is a helper for reporting internal compiler errors.
/// Construct the InternalCompilerError with the source location of the ICE
/// fault and append any error details with the `<<` operator.
/// When the InternalCompilerError is destructed, the concatenated error message
/// is appended to the diagnostics list with the severity of
/// tint::diag::Severity::InternalCompilerError, and if a
/// InternalCompilerErrorReporter is set, then it is called with the diagnostic
/// list.
class InternalCompilerError {
public:
/// Constructor
/// @param file the file containing the ICE
/// @param line the line containing the ICE
/// @param system the Tint system that has raised the ICE
/// @param diagnostics the list of diagnostics to append the ICE message to
InternalCompilerError(const char* file,
size_t line,
diag::System system,
diag::List& diagnostics);
/// Destructor.
/// Adds the internal compiler error message to the diagnostics list, and then
/// calls the InternalCompilerErrorReporter if one is set.
~InternalCompilerError();
/// Appends `arg` to the ICE message.
/// @param arg the argument to append to the ICE message
/// @returns this object so calls can be chained
template <typename T>
InternalCompilerError& operator<<(T&& arg) {
msg_ << std::forward<T>(arg);
return *this;
}
private:
char const* const file_;
size_t const line_;
diag::System system_;
diag::List& diagnostics_;
std::stringstream msg_;
};
} // namespace tint
/// TINT_ICE() is a macro for appending an internal compiler error message
/// to the diagnostics list `diagnostics`, and calling the
/// InternalCompilerErrorReporter with the full diagnostic list if a reporter is
/// set.
/// The ICE message contains the callsite's file and line.
/// Use the `<<` operator to append an error message to the ICE.
#define TINT_ICE(system, diagnostics) \
tint::InternalCompilerError(__FILE__, __LINE__, \
::tint::diag::System::system, diagnostics)
/// TINT_UNREACHABLE() is a macro for appending a "TINT_UNREACHABLE"
/// internal compiler error message to the diagnostics list `diagnostics`, and
/// calling the InternalCompilerErrorReporter with the full diagnostic list if a
/// reporter is set.
/// The ICE message contains the callsite's file and line.
/// Use the `<<` operator to append an error message to the ICE.
#define TINT_UNREACHABLE(system, diagnostics) \
TINT_ICE(system, diagnostics) << "TINT_UNREACHABLE "
/// TINT_UNIMPLEMENTED() is a macro for appending a "TINT_UNIMPLEMENTED"
/// internal compiler error message to the diagnostics list `diagnostics`, and
/// calling the InternalCompilerErrorReporter with the full diagnostic list if a
/// reporter is set.
/// The ICE message contains the callsite's file and line.
/// Use the `<<` operator to append an error message to the ICE.
#define TINT_UNIMPLEMENTED(system, diagnostics) \
TINT_ICE(system, diagnostics) << "TINT_UNIMPLEMENTED "
/// TINT_ASSERT() is a macro for checking the expression is true, triggering a
/// TINT_ICE if it is not.
/// The ICE message contains the callsite's file and line.
/// @warning: Unlike TINT_ICE() and TINT_UNREACHABLE(), TINT_ASSERT() does not
/// append a message to an existing tint::diag::List. As such, TINT_ASSERT()
/// may silently fail in builds where SetInternalCompilerErrorReporter() is not
/// called. Only use in places where there's no sensible place to put proper
/// error handling.
#define TINT_ASSERT(system, condition) \
do { \
if (!(condition)) { \
tint::diag::List diagnostics; \
TINT_ICE(system, diagnostics) \
<< "TINT_ASSERT(" #system ", " #condition ")"; \
} \
} while (false)
#endif // SRC_DEBUG_H_