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