#pragma once

#include ".generated/PgsqlLexer.h"
#include ".generated/PgsqlParser.h"
#include "CaseChangingCharStream.h"
#include "ErrorListener.h"

class Parser
{
public:
    Parser(const std::string &input_string);
    Parser(std::unique_ptr<antlr4::CharStream> stream);

    std::unique_ptr<sqlast::StatementList> Parse();

    int errorCount() const
    {
        return Errors.errorCount();
    }
private:
    std::unique_ptr<antlr4::CharStream> InputStream;
    CaseChangingCharStream CaseFilter;
    PgsqlLexer Lexer;
    antlr4::CommonTokenStream TokenStream;
    PgsqlParser AParser;
    ErrorListener Errors;
};