void Parser::onYield(Token &out, Token *expr) {
if (!RuntimeOption::EnableHipHopSyntax) {
error("Yield is not enabled: %s", getMessage().c_str());
return;
}
if (!haveFunc()) {
error("Yield cannot only be used inside a function: %s",
getMessage().c_str());
return;
}
FunctionStatementPtr func = peekFunc();
if (func->hasReturn()) {
error("Cannot mix 'return' and 'yield' in the same function: %s",
getMessage().c_str());
return;
}
if (haveClass()) {
if (strcasecmp(func->name().data(), peekClass()->name().data()) == 0) {
error("'yield' is not allowed in potential constructors: %s",
getMessage().c_str());
return;
}
if (func->name().substr(0, 2) == "__") {
error("'yield' is not allowed in constructor, destructor, or "
"magic methods: %s", getMessage().c_str());
return;
}
}
int index = func->addYield();
Token stmts;
transform_yield(this, stmts, index, expr);
out.reset();
out->stmt() = stmts->getStmtList();
}
Variant EvalCreateFunction::InvokeImpl(VariableEnvironment &env,
CArrRef params) {
int size = params.size();
if (size != 2) throw InvalidFunctionCallException("create_function");
Variant var = params.rvalAt(0);
Variant body = params.rvalAt(1);
vector<StaticStatementPtr> statics;
ostringstream fnStream;
string id(RequestEvalState::unique());
fnStream << "<?php function lambda_" << id << "(" << var.toString().data() <<
") {" << body.toString().data() << "}\n";
StatementPtr bodyAst = Parser::ParseString(fnStream.str().c_str(), statics);
if (!bodyAst) return false;
ostringstream nameStream;
nameStream << "$lambda_" << id;
FunctionStatementPtr f = bodyAst->cast<StatementListStatement>()->stmts()[0];
ASSERT(f);
f->changeName(nameStream.str());
SmartPtr<CodeContainer> cc(new StringCodeContainer(bodyAst));
RequestEvalState::addCodeContainer(cc);
f->eval(env);
return String(f->name().c_str(), f->name().size(), AttachLiteral);
}