blob: 102a3c330c122facdd1a26da0ebdbe56d1553bb3 [file] [log] [blame]
#pragma once
#include <QString>
#include "Token.h"
#include "AstNode.h"
#include "Function.h"
struct ParsePos
{
int line = 0,
pos = 0,
lineOffset = 0;
operator QString();
};
class ParseResult
{
public:
ParseResult() = default;
ParseResult(bool okay);
explicit ParseResult(int status, ParsePos pos = {});
ParseResult(int status, QString message, ParsePos pos = {});
enum
{
NO_MATCH,
COMPLETE,
INCOMPLETE,
};
operator bool() const;
ParsePos pos() const;
QString message() const;
int status() const;
private:
int _status = COMPLETE;
QString _message = "";
ParsePos _pos;
};
class Parser
{
public:
explicit Parser(QString input);
QChar peek();
QChar get();
bool atEnd();
void skip();
QString line(int n) const;
template <typename T>
ParseResult parseSymbol(T *node);
template <typename T>
ParseResult parseIdentifier(T *node);
template <typename T>
ParseResult parseNumber(T *node);
template <typename T>
ParseResult parseVariable(T *node);
template <typename T>
ParseResult parseParens(T *node);
ParseResult parseFunction(AstNode *node);
template <typename T>
ParseResult parseMany(QList<T> *list);
template <typename T>
ParseResult parseString(QList<T> *list);
template <typename T>
ParseResult parseOne(T *node);
ParseResult parseSentence(Sentence *sentence);
ParseResult parseFunctionDefinition(Function *function);
ParsePos save() const;
void reset(ParsePos pos);
private:
int _pos = 0;
int _line = 1;
int _offset = 1;
QString _input;
};
template <>
ParseResult Parser::parseOne<Token>(Token *node);
template <>
ParseResult Parser::parseOne<AstNode>(AstNode *node);