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47 changes: 47 additions & 0 deletions
47
lib/PhpParser/Lexer/TokenEmulator/NullsafeTokenEmulator.php
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| <?php declare(strict_types=1); | ||
|
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| namespace PhpParser\Lexer\TokenEmulator; | ||
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| use PhpParser\Lexer\Emulative; | ||
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| final class NullsafeTokenEmulator implements TokenEmulatorInterface | ||
| { | ||
| public function getPhpVersion(): string | ||
| { | ||
| return Emulative::PHP_8_0; | ||
| } | ||
|
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| public function isEmulationNeeded(string $code): bool | ||
| { | ||
| return strpos($code, '?->') !== false; | ||
| } | ||
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| public function emulate(string $code, array $tokens): array | ||
| { | ||
| // We need to manually iterate and manage a count because we'll change | ||
| // the tokens array on the way | ||
| $line = 1; | ||
| for ($i = 0, $c = count($tokens); $i < $c; ++$i) { | ||
| if (isset($tokens[$i + 1])) { | ||
| if ($tokens[$i] === '?' && $tokens[$i + 1][0] === \T_OBJECT_OPERATOR) { | ||
| array_splice($tokens, $i, 2, [ | ||
| [\T_NULLSAFE_OBJECT_OPERATOR, '?->', $line] | ||
| ]); | ||
| $c--; | ||
| continue; | ||
| } | ||
| } | ||
| if (\is_array($tokens[$i])) { | ||
| $line += substr_count($tokens[$i][1], "\n"); | ||
| } | ||
| } | ||
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| return $tokens; | ||
| } | ||
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| public function reverseEmulate(string $code, array $tokens): array | ||
| { | ||
| // ?-> was not valid code previously, don't bother. | ||
| return $tokens; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
| <?php declare(strict_types=1); | ||
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| namespace PhpParser\Node\Expr; | ||
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| use PhpParser\Node\Arg; | ||
| use PhpParser\Node\Expr; | ||
| use PhpParser\Node\Identifier; | ||
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| class NullsafeMethodCall extends Expr | ||
| { | ||
| /** @var Expr Variable holding object */ | ||
| public $var; | ||
| /** @var Identifier|Expr Method name */ | ||
| public $name; | ||
| /** @var Arg[] Arguments */ | ||
| public $args; | ||
|
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| /** | ||
| * Constructs a nullsafe method call node. | ||
| * | ||
| * @param Expr $var Variable holding object | ||
| * @param string|Identifier|Expr $name Method name | ||
| * @param Arg[] $args Arguments | ||
| * @param array $attributes Additional attributes | ||
| */ | ||
| public function __construct(Expr $var, $name, array $args = [], array $attributes = []) { | ||
| $this->attributes = $attributes; | ||
| $this->var = $var; | ||
| $this->name = \is_string($name) ? new Identifier($name) : $name; | ||
| $this->args = $args; | ||
| } | ||
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| public function getSubNodeNames() : array { | ||
| return ['var', 'name', 'args']; | ||
| } | ||
|
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| public function getType() : string { | ||
| return 'Expr_NullsafeMethodCall'; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| <?php declare(strict_types=1); | ||
|
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| namespace PhpParser\Node\Expr; | ||
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| use PhpParser\Node\Expr; | ||
| use PhpParser\Node\Identifier; | ||
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| class NullsafePropertyFetch extends Expr | ||
| { | ||
| /** @var Expr Variable holding object */ | ||
| public $var; | ||
| /** @var Identifier|Expr Property name */ | ||
| public $name; | ||
|
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| /** | ||
| * Constructs a nullsafe property fetch node. | ||
| * | ||
| * @param Expr $var Variable holding object | ||
| * @param string|Identifier|Expr $name Property name | ||
| * @param array $attributes Additional attributes | ||
| */ | ||
| public function __construct(Expr $var, $name, array $attributes = []) { | ||
| $this->attributes = $attributes; | ||
| $this->var = $var; | ||
| $this->name = \is_string($name) ? new Identifier($name) : $name; | ||
| } | ||
|
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| public function getSubNodeNames() : array { | ||
| return ['var', 'name']; | ||
| } | ||
|
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| public function getType() : string { | ||
| return 'Expr_NullsafePropertyFetch'; | ||
| } | ||
| } |
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