\w+)$#'; /** * @var ValueResolver */ private $valueResolver; public function __construct(ValueResolver $valueResolver) { $this->valueResolver = $valueResolver; } public function resolvePatternExpressionWithoutEIfFound(Expr $expr): ?Expr { if ($expr instanceof String_) { $pattern = $this->valueResolver->getValue($expr); if (! is_string($pattern)) { return null; } $delimiter = $pattern[0]; if (! is_string($delimiter)) { throw new ShouldNotHappenException(); } /** @var string $modifiers */ $modifiers = Strings::after($pattern, $delimiter, -1); if (! Strings::contains($modifiers, 'e')) { return null; } $patternWithoutE = $this->createPatternWithoutE($pattern, $delimiter, $modifiers); return new String_($patternWithoutE); } if ($expr instanceof Concat) { return $this->matchConcat($expr); } return null; } private function createPatternWithoutE(string $pattern, string $delimiter, string $modifiers): string { $modifiersWithoutE = Strings::replace($modifiers, '#e#', ''); return Strings::before($pattern, $delimiter, -1) . $delimiter . $modifiersWithoutE; } private function matchConcat(Concat $concat): ?Expr { $lastItem = $concat->right; if (! $lastItem instanceof String_) { return null; } $matches = Strings::match($lastItem->value, self::LETTER_SUFFIX_REGEX); if (! isset($matches['modifiers'])) { return null; } if (! Strings::contains($matches['modifiers'], 'e')) { return null; } // replace last "e" in the code $lastItem->value = Strings::replace($lastItem->value, self::LAST_E_REGEX, '$1$2'); return $concat; } }