75 lines
2.2 KiB
PHP
75 lines
2.2 KiB
PHP
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<?php
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declare(strict_types=1);
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namespace PhpParser;
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/**
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* Modifiers used (as a bit mask) by various flags subnodes, for example on classes, functions,
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* properties and constants.
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*/
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final class Modifiers
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{
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public const PUBLIC = 1;
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public const PROTECTED = 2;
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public const PRIVATE = 4;
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public const STATIC = 8;
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public const ABSTRACT = 16;
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public const FINAL = 32;
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public const READONLY = 64;
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public const VISIBILITY_MASK = 1 | 2 | 4;
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/**
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* @internal
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*/
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public static function verifyClassModifier(int $a, int $b): void
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{
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if ($a & Modifiers::ABSTRACT && $b & Modifiers::ABSTRACT) {
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throw new Error('Multiple abstract modifiers are not allowed');
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}
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if ($a & Modifiers::FINAL && $b & Modifiers::FINAL) {
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throw new Error('Multiple final modifiers are not allowed');
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}
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if ($a & Modifiers::READONLY && $b & Modifiers::READONLY) {
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throw new Error('Multiple readonly modifiers are not allowed');
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}
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if ($a & 48 && $b & 48) {
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throw new Error('Cannot use the final modifier on an abstract class');
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}
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}
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/**
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* @internal
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*/
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public static function verifyModifier(int $a, int $b): void
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{
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if ($a & Modifiers::VISIBILITY_MASK && $b & Modifiers::VISIBILITY_MASK) {
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throw new Error('Multiple access type modifiers are not allowed');
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}
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if ($a & Modifiers::ABSTRACT && $b & Modifiers::ABSTRACT) {
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throw new Error('Multiple abstract modifiers are not allowed');
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}
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if ($a & Modifiers::STATIC && $b & Modifiers::STATIC) {
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throw new Error('Multiple static modifiers are not allowed');
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}
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if ($a & Modifiers::FINAL && $b & Modifiers::FINAL) {
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throw new Error('Multiple final modifiers are not allowed');
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}
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if ($a & Modifiers::READONLY && $b & Modifiers::READONLY) {
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throw new Error('Multiple readonly modifiers are not allowed');
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}
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if ($a & 48 && $b & 48) {
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throw new Error('Cannot use the final modifier on an abstract class member');
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}
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}
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}
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