protected function verifyReturn($function, State $state)
{
if (!$function->stmts) {
// interface
return [];
}
$errors = [];
if ($function->returnType) {
$type = Type::fromDecl($function->returnType->value);
} else {
$type = Type::extractTypeFromComment("return", $function->getAttribute('doccomment'));
if (Type::mixed()->equals($type)) {
// only verify actual types
return $errors;
}
}
$returns = $this->findReturnBlocks($function->stmts);
foreach ($returns as $return) {
if (!$return || !$return->expr) {
// Default return, no
if ($type->allowsNull()) {
continue;
}
if (!$return) {
$errors[] = ["Default return found for non-null type {$type}", $function];
} else {
$errors[] = ["Explicit null return found for non-null type {$type}", $return];
}
} elseif (!$return->expr->type) {
var_dump($return->expr);
$errors[] = ["Could not resolve type for return", $return];
} else {
if (!$state->resolver->resolves($return->expr->type, $type)) {
$errors[] = ["Type mismatch on return value, found {$return->expr->type} expecting {$type}", $return];
}
}
}
return $errors;
}
/**
* @return array
*/
protected function verifyCall($func, $call, $state, $name)
{
$errors = [];
foreach ($func->params as $idx => $param) {
if (!isset($call->args[$idx])) {
if (!$param->defaultVar) {
$errors[] = ["Missing required argument {$idx} for call {$name}()", $call];
}
continue;
}
if ($param->type) {
$type = Type::fromDecl($param->type->value);
} else {
$type = Type::extractTypeFromComment("param", $param->function->getAttribute('doccomment'), $param->name->value);
if (Type::mixed()->equals($type)) {
continue;
}
}
if (!$state->resolver->resolves($call->args[$idx]->type, $type)) {
$errors[] = ["Type mismatch on {$name}() argument {$idx}, found {$call->args[$idx]->type} expecting {$type}", $call];
}
}
return $errors;
}
protected function processAssertion(Assertion $assertion, Operand $source, SplObjectStorage $resolved)
{
if ($assertion instanceof Assertion\TypeAssertion) {
$tmp = $this->processTypeAssertion($assertion, $source, $resolved);
if ($tmp) {
return $tmp;
}
} elseif ($assertion instanceof Assertion\NegatedAssertion) {
$op = $this->processAssertion($assertion->value[0], $source, $resolved);
if ($op instanceof Type) {
// negated type assertion
if (isset($resolved[$source])) {
return $resolved[$source]->removeType($op);
}
// Todo, figure out how to wait for resolving
return Type::mixed()->removeType($op);
}
}
return false;
}
