Parser.hpp

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#pragma once
#include "../../../AST/AST.hpp"
#include <memory>
#include <optional>
#include <vector>
#include <filesystem>
namespace Phasor
{

class Parser
{
  public:
    Parser(const std::vector<Token> &tokens);
    Parser(const std::vector<Token> &tokens, const std::filesystem::path &sourcePath);
 
    inline void setSourcePath(const std::filesystem::path &path)
    {
        sourcePath = path;
    }
 
    std::unique_ptr<AST::Program> parse();
    
    struct Error
    {
        std::string message;
        size_t      line;
        size_t      column;
    };
    std::optional<Error> getError() const
    {
        return lastError;
    }
  private:
    std::vector<Token> tokens;
    int                current = 0;
    std::string        currentFunction = "";
    std::optional<Error> lastError;
    std::filesystem::path sourcePath;
 
    Token peek();
    Token previous();
    Token advance();
    bool  isAtEnd();
    bool  check(Phasor::TokenType type);
    Token peekNext();
    bool  match(Phasor::TokenType type);
    bool  match(Phasor::TokenType type, std::string lexeme);
    Token consume(Phasor::TokenType type, std::string message);
    Token consume(Phasor::TokenType type, std::string lexeme, std::string message);
    Token expect(Phasor::TokenType type, const std::string &message);
 
    std::unique_ptr<AST::Statement>          declaration();
    std::unique_ptr<AST::Statement>          varDeclaration();
    std::unique_ptr<AST::Statement>          functionDeclaration();
    std::unique_ptr<AST::Statement>          statement();
    std::unique_ptr<AST::Statement>          printStatement();
    std::unique_ptr<AST::Statement>          ifStatement();
    std::unique_ptr<AST::Statement>          whileStatement();
    std::unique_ptr<AST::Statement>          forStatement();
    std::unique_ptr<AST::Statement>          switchStatement();
    std::unique_ptr<AST::Statement>          returnStatement();
    std::unique_ptr<AST::Statement>          unsafeStatement();
    std::unique_ptr<AST::BlockStmt>          block();
    std::unique_ptr<AST::Statement>          importStatement();
    std::unique_ptr<AST::Statement>          exportStatement();
    std::unique_ptr<AST::Statement>          expressionStatement();
    std::unique_ptr<AST::TypeNode>           parseType();
    std::unique_ptr<AST::Expression>         expression();
    std::unique_ptr<AST::Expression>         assignment();
    std::unique_ptr<AST::Expression>         logicalOr();
    std::unique_ptr<AST::Expression>         logicalAnd();
    std::unique_ptr<AST::Expression>         equality();
    std::unique_ptr<AST::Expression>         comparison();
    std::unique_ptr<AST::Expression>         term();
    std::unique_ptr<AST::Expression>         factor();
    std::unique_ptr<AST::Expression>         unary();
    std::unique_ptr<AST::Expression>         call();
    std::unique_ptr<AST::Expression>         finishCall(std::unique_ptr<AST::Expression> callee);
    std::unique_ptr<AST::Expression>         primary();
    std::unique_ptr<AST::StructDecl>         structDecl();
    std::unique_ptr<AST::StructInstanceExpr> structInstance();
    std::unique_ptr<AST::Expression>         fieldAccess(std::unique_ptr<AST::Expression> object);
};
} // namespace Phasor