/**
* find matching symbol
*/
TokenPtr SourceScope::findSymbol(TokenPtr token)
{
// find symbol in current scope
for (auto & sym : m_symbols) {
if (sym->getLexeme() == token->getLexeme()) return sym;
}
// parent scope
if (auto p = m_parent.lock()) return p->findSymbol(token);
// didn't find
return nullptr;
}
/**
* Add new identifier.
* return false if identifier with the given name already in the list
*/
bool SourceScope::addSymbol(TokenPtr token)
{
// find existing
auto iter = std::find_if(m_symbols.begin(), m_symbols.end(), [&](const TokenPtr & p) {
return p->getLexeme() == token->getLexeme();
});
// foung means it contains symbol already
if (iter != m_symbols.end()) return false;
// add it
m_symbols.push_back(token);
// success
return true;
}