classSymbolDeclaration

packages/bison-parser/src/Ast/Declaration/Symbols/SymbolDeclaration.php:23

final class SymbolDeclaration
    implements Declaration

Public API: explicitly declared with @visibility public.

A %token, %nterm or %type directive and the symbols it lists.

Each entry carries the tag in force where it was written, so %token <a> X <b> Y yields two entries with different tags.

Reading typed symbolsdoctest

$file = (new \BisonParser\Parser())->parse("%type <node> expr stmt\n%%\nexpr: 'a';\n");
    $file->declarations[0]->class->value // => 'type'
    array_map(static fn ($entry) => $entry->symbol->value, $file->declarations[0]->entries) // => ['expr', 'stmt']

Properties§

public SymbolClass $class

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public list<SymbolEntry> $entries

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public Location $location

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Methods§

public function __construct(
    public SymbolClass $class,
    public list<SymbolEntry> $entries,
    public Location $location,
)

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Parameters

`$class`	`SymbolClass`	Which directive it is
`$entries`	`list<SymbolEntry>`	The symbols in order, at least one
`$location`	`Location`	Where the directive is written