function ParseDefinition(TokenStream $it)
{
$root = new ASTRoot();
while ($it->hasMore() && $it->expectAny([SyntaxMap::Annotation, SyntaxMap::Keyword], 0)) {
$annotations = ParseAnnotations($it);
$token = $it->val();
switch (strtolower($token->value)) {
case "type":
$type = ParseType($it);
$type->annotations = $annotations;
$root->types->add($type);
break;
case "entity":
$entity = ParseEntity($it);
$entity->annotations = $annotations;
$root->entities->add($entity);
break;
case "const":
$const = ParseConstant($it);
$const->annotations = $annotations;
$root->constants->add($const);
break;
case "enum":
$enum = ParseEnum($it);
$enum->annotations = $annotations;
$root->enums->add($enum);
break;
default:
throw ParserException::unexpectedKeyword($token);
}
}
return $root;
}
