Parse argument lists into placeholders and arguments

[thekid]

// Parsed into new InvokeExpression(new Literal('strlen'), [new Literal('"Test"')])// Returns int(4)strlen('Test'); // Parsed into new PartialExpression([0 => false], new InvokeExpression(new Literal('strlen'), [null])// Returns a closure equivalent to fn($_0) => strlen($_0)
strlen(?); // Parsed into new PartialExpression([0 => true], new InvokeExpression(new Literal('strlen'), [null])// Returns a closure equivalent to fn(... $_0) => strlen(...$_0)strlen(...);

See https://wiki.php.net/rfc/partial_function_application

[thekid]

RFC has been declined