55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
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//===- StringMatcher.h - Generate a matcher for input strings ---*- C++ -*-===//
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//
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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 implements the StringMatcher class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TABLEGEN_STRINGMATCHER_H
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#define LLVM_TABLEGEN_STRINGMATCHER_H
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#include "llvm/ADT/StringRef.h"
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#include <string>
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#include <utility>
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#include <vector>
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namespace llvm {
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class raw_ostream;
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/// Given a list of strings and code to execute when they match, output a
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/// simple switch tree to classify the input string.
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///
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/// If a match is found, the code in Matches[i].second is executed; control must
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/// not exit this code fragment. If nothing matches, execution falls through.
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class StringMatcher {
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public:
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using StringPair = std::pair<std::string, std::string>;
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private:
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StringRef StrVariableName;
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const std::vector<StringPair> &Matches;
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raw_ostream &OS;
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public:
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StringMatcher(StringRef strVariableName,
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const std::vector<StringPair> &matches, raw_ostream &os)
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: StrVariableName(strVariableName), Matches(matches), OS(os) {}
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void Emit(unsigned Indent = 0, bool IgnoreDuplicates = false) const;
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private:
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bool EmitStringMatcherForChar(const std::vector<const StringPair *> &Matches,
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unsigned CharNo, unsigned IndentCount,
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bool IgnoreDuplicates) const;
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};
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} // end namespace llvm
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#endif // LLVM_TABLEGEN_STRINGMATCHER_H
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