Name
TokenStream::consumeName(int match)
{
Name value = name_from_string(nextStr().c_str());
consume(match);
return value;
}
std::string
TokenStream::consumeStr(int match)
{
std::string out = nextStr();
consume(match);
return out;
}
string countAndSay(int n) {
if(n<=0) return "";
string re="1";
for(int i=1;i<n;i++){
re=nextStr(re);
}
return re;
}
void TokenStream::dump()
{
int lookbehind = 5;
int lookahead = 15;
for (int i=-lookbehind; i < lookahead; i++) {
int index = position() + i;
if (index < 0) continue;
if (index >= length()) continue;
std::cout << "[" << i << "] " << get_token_text(next(i).match)
<< " '" << nextStr(i) << "'" << std::endl;
}
}
void getNext(string s, unordered_set<string> &dict, unordered_set<string> &isVisited, unordered_set<string> &nextStrs) {
for(int i = 0; i < s.length(); ++i) {
string nextStr(s);
for(char c = 'a'; c <= 'z'; ++c) {
if(c != nextStr[i]) {
swap(c, nextStr[i]);
if(dict.count(nextStr) && !isVisited.count(nextStr)) {
nextStrs.insert(nextStr);
isVisited.insert(nextStr);
}
swap(c, nextStr[i]);
}
}
}
}
void
TokenStream::consume(int match)
{
if (finished())
throw std::runtime_error(std::string("Unexpected EOF while looking for ")
+ get_token_text(match));
if ((match != -1) && next().match != match) {
std::stringstream msg;
msg << "Unexpected token (expected " << get_token_text(match)
<< ", found " << get_token_text(next().match)
<< " '" << nextStr() << "')";
throw std::runtime_error(msg.str());
}
_position++;
}
