79 lines
2.1 KiB
C++
79 lines
2.1 KiB
C++
//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines common utilities for generating C++ from tablegen
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// structures.
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//
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//===----------------------------------------------------------------------===//
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#ifndef MLIR_TABLEGEN_CODEGENHELPERS_H
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#define MLIR_TABLEGEN_CODEGENHELPERS_H
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#include "Dialect.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/ADT/StringRef.h"
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namespace mlir {
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namespace tblgen {
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// Simple RAII helper for defining ifdef-undef-endif scopes.
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class IfDefScope {
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public:
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IfDefScope(llvm::StringRef name, llvm::raw_ostream &os)
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: name(name.str()), os(os) {
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os << "#ifdef " << name << "\n"
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<< "#undef " << name << "\n\n";
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}
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~IfDefScope() { os << "\n#endif // " << name << "\n\n"; }
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private:
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std::string name;
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llvm::raw_ostream &os;
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};
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// A helper RAII class to emit nested namespaces for this op.
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class NamespaceEmitter {
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public:
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NamespaceEmitter(raw_ostream &os, const Dialect &dialect) : os(os) {
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if (!dialect)
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return;
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emitNamespaceStarts(os, dialect.getCppNamespace());
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}
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NamespaceEmitter(raw_ostream &os, StringRef cppNamespace) : os(os) {
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emitNamespaceStarts(os, cppNamespace);
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}
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~NamespaceEmitter() {
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for (StringRef ns : llvm::reverse(namespaces))
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if (ns.equals("mlir"))
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os << "} // namespace "
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<< "builder"
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<< "\n\n";
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else
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os << "} // namespace " << ns << "\n\n";
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}
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private:
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void emitNamespaceStarts(raw_ostream &os, StringRef cppNamespace) {
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llvm::SplitString(cppNamespace, namespaces, "::");
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for (StringRef ns : namespaces)
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if (ns.equals("mlir"))
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os << "namespace "
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<< "builder"
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<< " {\n";
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else
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os << "namespace " << ns << " {\n";
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}
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raw_ostream &os;
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SmallVector<StringRef, 2> namespaces;
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};
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} // namespace tblgen
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} // namespace mlir
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#endif // MLIR_TABLEGEN_CODEGENHELPERS_H
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