Class ExprBuilder

This class builds an if expression.

Namespace: Symfony\Component\Config\Definition\Builder
Author: Johannes M. Schmitt <schmittjoh@gmail.com>
Author: Christophe Coevoet <stof@notk.org>
Located at config/Symfony/Component/Config/Definition/Builder/ExprBuilder.php

Methods summary
`public`	# `__construct( Symfony\Component\Config\Definition\Builder\NodeDefinition $node )` Constructor Constructor Parameters `$node` `Symfony\Component\Config\Definition\Builder\NodeDefinition` $node The related node
`public Symfony\Component\Config\Definition\Builder\ExprBuilder`	# `always( Closure $then = null )` Marks the expression as being always used. Marks the expression as being always used. Parameters `$then` `Closure` $then Returns `Symfony\Component\Config\Definition\Builder\ExprBuilder`
`public Symfony\Component\Config\Definition\Builder\ExprBuilder`	# `ifTrue( Closure $closure = null )` Sets a closure to use as tests. Sets a closure to use as tests. The default one tests if the value is true. Parameters `$closure` `Closure` $closure Returns `Symfony\Component\Config\Definition\Builder\ExprBuilder`
`public Symfony\Component\Config\Definition\Builder\ExprBuilder`	# `ifString( )` Tests if the value is a string. Tests if the value is a string. Returns `Symfony\Component\Config\Definition\Builder\ExprBuilder`
`public Symfony\Component\Config\Definition\Builder\ExprBuilder`	# `ifNull( )` Tests if the value is null. Tests if the value is null. Returns `Symfony\Component\Config\Definition\Builder\ExprBuilder`
`public Symfony\Component\Config\Definition\Builder\ExprBuilder`	# `ifArray( )` Tests if the value is an array. Tests if the value is an array. Returns `Symfony\Component\Config\Definition\Builder\ExprBuilder`
`public Symfony\Component\Config\Definition\Builder\ExprBuilder`	# `ifInArray( array $array )` Tests if the value is in an array. Tests if the value is in an array. Parameters `$array` `array` $array Returns `Symfony\Component\Config\Definition\Builder\ExprBuilder`
`public Symfony\Component\Config\Definition\Builder\ExprBuilder`	# `ifNotInArray( array $array )` Tests if the value is not in an array. Tests if the value is not in an array. Parameters `$array` `array` $array Returns `Symfony\Component\Config\Definition\Builder\ExprBuilder`
`public Symfony\Component\Config\Definition\Builder\ExprBuilder`	# `then( Closure $closure )` Sets the closure to run if the test pass. Sets the closure to run if the test pass. Parameters `$closure` `Closure` $closure Returns `Symfony\Component\Config\Definition\Builder\ExprBuilder`
`public Symfony\Component\Config\Definition\Builder\ExprBuilder`	# `thenEmptyArray( )` Sets a closure returning an empty array. Sets a closure returning an empty array. Returns `Symfony\Component\Config\Definition\Builder\ExprBuilder`
`public Symfony\Component\Config\Definition\Builder\ExprBuilder`	# `thenInvalid( string $message )` Sets a closure marking the value as invalid at validation time. Sets a closure marking the value as invalid at validation time. if you want to add the value of the node in your message just use a %s placeholder. Parameters `$message` `string` $message Returns `Symfony\Component\Config\Definition\Builder\ExprBuilder` Throws `InvalidArgumentException`
`public Symfony\Component\Config\Definition\Builder\ExprBuilder`	# `thenUnset( )` Sets a closure unsetting this key of the array at validation time. Sets a closure unsetting this key of the array at validation time. Returns `Symfony\Component\Config\Definition\Builder\ExprBuilder` Throws `Symfony\Component\Config\Definition\Exception\UnsetKeyException`
`public Symfony\Component\Config\Definition\Builder\NodeDefinition`	# `end( )` Returns the related node Returns the related node Returns `Symfony\Component\Config\Definition\Builder\NodeDefinition` Throws `RuntimeException`
`public static array`	# `buildExpressions( array $expressions )` Builds the expressions. Builds the expressions. Parameters `$expressions` `Symfony\Component\Config\Definition\Builder\ExprBuilder[]` $expressions An array of ExprBuilder instances to build Returns `array`

Properties summary
`protected mixed`	`$node`	#
`public mixed`	`$ifPart`	#
`public mixed`	`$thenPart`	#

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