classAction

packages/bison-parser/src/Ast/Rule/Action.php:25

final class Action
    implements RhsItem

Public API: explicitly declared with @visibility public.

A braced action on a right-hand side, with its optional type tag and [name] reference.

Whether the action is a mid-rule action depends on what follows it in the alternative; the tree records the position and leaves that reading to the caller.

Reading a typed mid-rule actiondoctest

$file = (new \BisonParser\Parser())->parse("%%\ns: 'a' <int>{ \$\$ = 1; }[mid] 'b' ;\n");
    $action = $file->rules()[0]->alternatives[0]->items[1];
    $action->tag // => 'int'
    $action->code // => ' $$ = 1; '
    $action->namedReference // => 'mid'

Properties§

public string|null $tag

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public string $code

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public string|null $namedReference

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public Location $location

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Methods§

public function __construct(
    public string|null $tag,
    public string $code,
    public string|null $namedReference,
    public Location $location,
)

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Parameters

`$tag`	`string\|null`	The type tag before the braces, or null when none is given
`$code`	`string`	The code without its braces
`$namedReference`	`string\|null`	The `[name]` after the braces, or null when none is given
`$location`	`Location`	Where the tag or the opening brace is written