alexeyshockov/pattern-matcher

Pattern matching for PHP.

pattern-matcher

Simple pattern matching technique from functional languages. For PHP., _(*1)

Examples

With Option from schmittjoh/php-option: ``` php use function PatternMatcher\option_matcher;, _(*2)

$matcher = option_matcher(function ($className, ReflectionClass $class) { return ($class->getName() == $className) || $class->isSubclassOf($className); }) ->addCase(InputInterface::class, $input) ->addCase(OutputInterface::class, $output) ->addCase(Output::class, new Output($output)) ->addCase(HelperInterface::class, function (ReflectionClass $class) { foreach ($this->getHelperSet() as $helper) { if ($class->isInstance($helper)) { return $helper; } }, _(*3)

    throw new InvalidArgumentException("Helper with type " . $class->getName() . " is not registered.");
})

;, _(*4)

$argument = $argumentDefinition->getClass() ->flatMap($matcher) ->getOrThrow(new InvalidArgumentException( 'Parameter $' . $argumentDefinition->getName() . ': type is missed or not supported.' ));, _(*5)

Or with [ColadaX](https://github.com/alexeyshockov/colada-x):
``` php

use PatternMatcher\matcher;
use PatternMatcher\all;
use Colada\x;

matcher()
    ->addCase(all(x()->isActive(), x()->hasFriends()), )

Or pure: ``` php $matcher = (new PatternMatcher(function ($className, ReflectionClass $class) { return ($class->getName() == $className) || $class->isSubclassOf($className); })) ->addCase(InputInterface::class, $input) ->addCase(OutputInterface::class, $output) ->addCase(Output::class, new Output($output)) ->addCase(HelperInterface::class, function (ReflectionClass $class) { foreach ($this->getHelperSet() as $helper) { if ($class->isInstance($helper)) { return $helper; } }, _(*6)

    throw new InvalidArgumentException("Helper with type " . $class->getName() . " is not registered.");
})

;, _(*7)

$argument = $argumentDefinition->getClass() ->flatMap($matcher) ->getOrThrow(new InvalidArgumentException( 'Parameter $' . $argumentDefinition->getName() . ': type is missed or not supported.' )); ```, _(*8)