function ParseEnum(TokenStream $it)
{
$enum = new ASTEnum();
$it->getToken(SyntaxMap::Keyword);
$identifier = $it->getToken(SyntaxMap::Identifier);
$enum->name = $identifier->value;
//Verify that entity is not redeclared
$key = strtolower($identifier->value);
if (isset($it->types[$key])) {
throw ParserException::redeclaredEnum($identifier);
} else {
$it->types[$key] = $enum;
$it->enums[$key] = [];
}
$it->getToken(SyntaxMap::OpenBrace);
while (!$it->typeAt(SyntaxMap::CloseBrace, 0)) {
$enumValue = ParseEnumValue($it, $enum);
$enum->values->add($enumValue);
}
$it->getAndMove();
return $enum;
}
