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Jon Ross-Perkins
f63834c71d
#2569 added PrintAsID to //common/ostream.h, but given it's explorer-specific behavior, I don't think it's the right home for it. Noticed this while pondering better ostream interfaces.
37 lines
916 B
C++
37 lines
916 B
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#ifndef CARBON_EXPLORER_BASE_PRINT_AS_ID_H_
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#define CARBON_EXPLORER_BASE_PRINT_AS_ID_H_
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#include "common/ostream.h"
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namespace Carbon {
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// Helper to support printing the ID for a type that has a method
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// `void PrintID(llvm::raw_ostream& out) const`. Usage:
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//
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// out << PrintAsID(obj);
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template <typename T>
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class PrintAsID {
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public:
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explicit PrintAsID(const T& object) : object_(&object) {}
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friend auto operator<<(llvm::raw_ostream& out, const PrintAsID& self)
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-> llvm::raw_ostream& {
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self.object_->PrintID(out);
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return out;
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}
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private:
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const T* object_;
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};
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template <typename T>
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PrintAsID(const T&) -> PrintAsID<T>;
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} // namespace Carbon
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#endif // CARBON_EXPLORER_BASE_PRINT_AS_ID_H_
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