lrtable.cpp

一门课程的proj

#include "StdAfx.h"
#include ".\lrtable.h"

ActionAndGoto::ActionAndGoto()
{
	symbol = 0;
	status_convert = -1;
	type = -1;
}

ActionAndGoto::ActionAndGoto(int sy, int st, int ty)
{
	symbol = sy;
	status_convert = st;
	type = ty;
}
void ActionAndGoto::SetActionAndGoto(int sy, int st, int ty)
{
	symbol = sy;
	status_convert = st;
	type = ty;
}

void ActionAndGoto::output()
{
	switch(type)
	{
	case 1:
		{
			record<<"后继为"<<symbol<<"类型为"<<"规约---- ";
			record<<"按产生式"<<status_convert<<endl;
			return;
		}
	case 2:
		{
			record<<"类型为"<<"移进---- ";
			record<<"接收到终结符"<<symbol<<"转移到状态"<<status_convert<<endl;
			return;
		}
	case 4:
		{
			record<<"类型为"<<"接收---- ";
			record<<"分析结束"<<endl;
			return;
		}
	case 3:
		{
			record<<"非终结符"<<symbol<<"移进到状态"<<status_convert<<endl;
			return;
		}
	default:return;
	}
	
}

/* ---------------------------------------------------- */
/* ---------------------------------------------------- */
/* ---------------------------------------------------- */

LRTable_Item::LRTable_Item()
{
	_aag.clear();
	aag_num = 0;
	this->line_num = -1;
}

void LRTable_Item::AddItem(int sy, int st, int ty)
{
	ActionAndGoto *temp = new ActionAndGoto(sy, st, ty);
	_aag.push_back(*temp);
	aag_num++;
}

void LRTable_Item::output()
{
	for( int i = 0 ; i < aag_num ; i++)
		_aag[i].output();
}

/* ---------------------------------------------------- */
/* ---------------------------------------------------- */
/* ---------------------------------------------------- */

LRTable::LRTable(void)
{
	this->_item.clear();
	this->item_num = 0;
}

void LRTable::output()
{
	for( int i = 0 ; i < item_num ; i++)
		if( _item[i].aag_num != 0 )
		{
			record<<"in status "<<_item[i].line_num<<" ; "<<endl;
			_item[i].output();
			record<<endl<<endl;
		}
}

void LRTable::addItem(int line_num)
{
	LRTable_Item *newItem = new LRTable_Item();
	newItem->line_num = line_num;
	_item.push_back(*newItem);
	item_num++;
}

LRTable_Item * LRTable::findItem(int status_num)
{
	for( int i = 0 ; i < item_num ; i++)
		if( _item[i].line_num == status_num )
			return &_item[i];
	return NULL;
}