firsttest.cpp

来自「C编译器」· C++ 代码 · 共 29 行

#include "parse.h"

vector<string> makeFirst(vector<string> vecstr,int *p )
{
	vector<string> first;
	int i; p = &i;
	for( = 0;i < vecstr.size();i++)
	{
		if( findIndex(vecstr[i] ) == -1 )
		{
			if ( !hasexisted( first,vecstr[i] ) ) 
				first.push_back(vecstr[i]);
			break;
		}//if
		else
		{
			int index = findIndex( vecstr[i] );                
			add( nonterminals[index].first,first );
			if( !hasexisted( nonterminals[ index ].first,  "ε" ) )break;
		}//else
	}//for
}

void add(vector<string>  v1,vector<string> v2)
{
	for(int i = 0;i < v1.size();i++)
		if( v1[i] != "ε" && !hasexisted(v2,v1[i]) )v2.push_back(v1[i]);
}