[WIP] Support throwing functions

[Aerendir]

The goal of this PR is to support functions and methods that use functions that may throw exceptions.

use function \Safe\sprintf;

class AClass {
    public function aMethod()
    {
        return sprintf('This method may throw an exception');
    }
}

PROBLEM

Currently it is not possible to build the full namespace of the thrown class.

@TomasVotruba , any ideas about how to proceed to get the full namespace of the thrown classes?

Relevant code:

• https://github.com/rectorphp/rector/pull/2928/files#diff-7992343b214da5dce624ce2b1e55384aR262-R292

In the commit there is the dump in HTML format that may be useful.

[TomasVotruba]

Why not use the same trick as with docblock and method reflection, like the last time?

[Aerendir]

Because it doesn't work for functions: Nette doesn't support building the full namespace for functions, only for classes.

[Aerendir]

@TomasVotruba ping

[TomasVotruba]

Ah. In that case, you need to solve the behavior yourself with:

$node->getAttribute(AttributeKey::USE_NODES)

Foreach it and match the propper name

[TomasVotruba]

Here is some inspiration:

rector/rules/type-declaration/src/PHPStan/Type/ObjectTypeSpecifier.php

Lines 58 to 86 in fa5d629

	private function matchAliasedObjectType(Node $node, ObjectType $objectType): ?AliasedObjectType
	{
	/** @var Use_[]|null $uses */
	$uses = $node->getAttribute(AttributeKey::USE_NODES);
	if ($uses === null) {
	return null;
	}
	foreach ($uses as $use) {
	foreach ($use->uses as $useUse) {
	if ($useUse->alias === null) {
	continue;
	}
	$useName = $useUse->name->toString();
	$alias = $useUse->alias->toString();
	$fullyQualifiedName = $useUse->name->toString();
	// A. is alias in use statement matching this class alias
	if ($useUse->alias->toString() === $objectType->getClassName()) {
	return new AliasedObjectType($alias, $fullyQualifiedName);
	}
	// B. is aliased classes matching the class name
	if ($useName === $objectType->getClassName()) {
	return new AliasedObjectType($alias, $fullyQualifiedName);
	}
	}
	}

Just instead of ObjectType, you can use the short string name

[Aerendir]

Ok, I will try this way...

[Aerendir]

Too many errors: I will send a clean PR.