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#pragma once
#include "cps/Lexer.h"
#include "cps/AST.h"
#include <vector>
#include <initializer_list>
#include <memory>
#include <map>
#include <optional>
#include <tuple>
#include <string>
namespace cps {
class Parser {
Lexer &Lex;
int CurTok;
unsigned NumErrors = 0;
std::map<int, int> BinopPrecedence;
int getNextToken();
int GetTokPrecedence();
std::unique_ptr<ExprAST> ParseExpression();
std::unique_ptr<ExprAST> ParseUnary();
std::unique_ptr<ExprAST> ParsePrimary();
std::unique_ptr<ExprAST> ParseBinOpRHS(int ExprPrec, std::unique_ptr<ExprAST> LHS);
std::unique_ptr<ExprAST> ParseNumberExpr();
std::unique_ptr<ExprAST> ParseIdentifierExpr();
std::unique_ptr<ExprAST> ParseParenExpr();
std::string ParseTypeName(bool AllowVoid = false);
std::unique_ptr<StmtAST> ParseStatement();
std::unique_ptr<StmtAST> ParseStatementImpl();
std::vector<std::unique_ptr<StmtAST>> ParseBlock(std::initializer_list<int> Terminators);
std::optional<std::vector<std::unique_ptr<ExprAST>>> ParseExprList(char CloseDelim, bool AllowEmpty);
void syncToStatementStart();
std::unique_ptr<StmtAST> ParseIfStmt();
std::unique_ptr<StmtAST> ParseWhileStmt();
std::unique_ptr<StmtAST> ParseRepeatStmt();
std::unique_ptr<StmtAST> ParseForStmt();
std::unique_ptr<StmtAST> ParseDeclare();
std::unique_ptr<StmtAST> ParseFunction();
std::unique_ptr<StmtAST> ParseProcedure();
std::unique_ptr<StmtAST> ParseCallStmt();
std::unique_ptr<StmtAST> ParseReturnStmt();
std::optional<std::vector<std::tuple<std::string, std::string, bool>>> ParsePrototypeArgs();
public:
Parser(Lexer &L);
std::vector<std::unique_ptr<StmtAST>> Parse();
bool hadError() const { return NumErrors != 0; }
};
} // namespace cps
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