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Jon Ross-Perkins
7fc203c536
I'm trying to reduce the amount of per-SemanticsNodeKind boilerplate, and make mistakes (e.g., SemanticsNodeKind not matching the Make name, misplacing the type, or Get/Make type mismatches) easier to see. I could've done this with (more) macros, but felt that the template approach was reasonable enough and likely easier to understand/debug. I'm not sure whether there's more that I could be doing with variadics to reduce the amount of factory code, but this feels good right now.
41 lines
1.1 KiB
C++
41 lines
1.1 KiB
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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#include "toolchain/semantics/semantics_node.h"
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#include "toolchain/semantics/semantics_builtin_kind.h"
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namespace Carbon {
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static auto PrintArgs(llvm::raw_ostream& /*out*/,
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const SemanticsNode::NoArgs /*no_args*/) -> void {}
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template <typename T>
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static auto PrintArgs(llvm::raw_ostream& out, T arg) -> void {
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out << ", arg0: " << arg;
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}
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template <typename T0, typename T1>
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static auto PrintArgs(llvm::raw_ostream& out, std::pair<T0, T1> args) -> void {
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PrintArgs(out, args.first);
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out << ", arg1: " << args.second;
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}
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void SemanticsNode::Print(llvm::raw_ostream& out) const {
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out << "{kind: " << kind_;
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switch (kind_) {
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#define CARBON_SEMANTICS_NODE_KIND(Name) \
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case SemanticsNodeKind::Name: \
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PrintArgs(out, GetAs##Name()); \
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break;
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#include "toolchain/semantics/semantics_node_kind.def"
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}
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if (type_id_.is_valid()) {
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out << ", type: " << type_id_;
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}
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out << "}";
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}
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} // namespace Carbon
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