verilog/analysis/checkers/macro_string_concatenation_rule.h

// Copyright 2017-2020 The Verible Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef VERIBLE_VERILOG_ANALYSIS_CHECKERS_MACRO_STRING_CONCATENATION_RULE_H_
#define VERIBLE_VERILOG_ANALYSIS_CHECKERS_MACRO_STRING_CONCATENATION_RULE_H_

#include <set>
#include <string>

#include "common/analysis/token_stream_lint_rule.h"
#include "common/text/token_info.h"
#include "verilog/analysis/descriptions.h"

namespace verilog {
namespace analysis {

// MacroStringConcatenationRule checks defines for accidental use of token
// concatenation (``) inside plain string literal.
class MacroStringConcatenationRule : public verible::TokenStreamLintRule {
 public:
  using rule_type = verible::TokenStreamLintRule;

  static const LintRuleDescriptor& GetDescriptor();

  MacroStringConcatenationRule() : state_(State::kNormal) {}

  void HandleToken(const verible::TokenInfo& token) final;

  verible::LintRuleStatus Report() const final;

 private:
  // States of the internal token-based analysis.
  enum class State {
    kNormal,
    kInsideDefineBody,
  };

  // Internal lexical analysis state.
  State state_;

  std::set<verible::LintViolation> violations_;
};

}  // namespace analysis
}  // namespace verilog

#endif  // VERIBLE_VERILOG_ANALYSIS_CHECKERS_MACRO_STRING_CONCATENATION_RULE_H_