diamantaire/third_party/parser/include/ruby_parser/context.hh

#ifndef RUBY_PARSER_CONTEXT_HH
#define RUBY_PARSER_CONTEXT_HH

#include <optional>
#include <set>
#include <vector>

namespace ruby_parser {

class Context {
public:
    enum class State {
        CLASS,
        SCLASS,
        DEF,
        DEFS,
        BLOCK,
        LAMBDA,
    };

    void push(State state);
    void pop();
    void reset();
    bool inClass();
    bool indirectlyInDef();
    bool classDefintinionAllowed();
    bool moduleDefintinionAllowed();
    bool dynamicConstDefintinionAllowed();

private:
    std::vector<State> stack;

    std::optional<int> firstIndexOfState(State state);
    std::optional<int> lastIndexOfState(State state);
    bool contains(State state);
};

} // namespace ruby_parser

#endif