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<?php |
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/** |
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* File containing the {@see Mailcode_Parser_Statement_Tokenizer} class. |
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* |
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* @package Mailcode |
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* @subpackage Parser |
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* @see Mailcode_Parser_Statement_Tokenizer |
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*/ |
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declare(strict_types=1); |
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namespace Mailcode; |
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/** |
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* Mailcode statement tokenizer: parses a mailcode statement |
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* into its logical parts. |
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* |
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* @package Mailcode |
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* @subpackage Parser |
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* @author Sebastian Mordziol <[email protected]> |
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*/ |
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class Mailcode_Parser_Statement_Info |
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{ |
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/** |
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* @var Mailcode_Parser_Statement_Tokenizer |
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*/ |
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protected $tokenizer; |
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/** |
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* @var Mailcode_Parser_Statement_Tokenizer_Token[] |
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*/ |
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protected $tokens = array(); |
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/** |
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* @var Mailcode_Parser_Statement_Info_Keywords |
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*/ |
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protected $keywords; |
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/** |
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* @var Mailcode_Parser_Statement_Info_Variables |
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*/ |
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protected $variables; |
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public function __construct(Mailcode_Parser_Statement_Tokenizer $tokenizer) |
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{ |
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$this->tokenizer = $tokenizer; |
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$this->keywords = new Mailcode_Parser_Statement_Info_Keywords($this, $this->tokenizer); |
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$this->variables = new Mailcode_Parser_Statement_Info_Variables($this, $this->tokenizer); |
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} |
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/** |
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* Whether the whole statement is a variable being assigned a value. |
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* |
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* @return bool |
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*/ |
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public function isVariableAssignment(): bool |
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{ |
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return $this->variables->isAssignment(); |
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} |
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/** |
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* Whether the whole statement is a variable being compared to something. |
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* |
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* @return bool |
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*/ |
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public function isVariableComparison(): bool |
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{ |
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return $this->variables->isComparison(); |
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} |
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/** |
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* Retrieves all variables used in the statement. |
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* |
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* @return Mailcode_Variables_Variable[] |
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* @throws Mailcode_Parser_Exception |
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*/ |
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public function getVariables(): array |
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{ |
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return $this->variables->getAll(); |
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} |
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/** |
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* Retrieves a variable by its position in the command's parameters. |
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* Returns null if there is no parameter at the specified index, or |
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* if it is of another type. |
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* |
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* @param int $index Zero-based index. |
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* @return Mailcode_Parser_Statement_Tokenizer_Token_Variable|NULL |
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*/ |
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public function getVariableByIndex(int $index): ?Mailcode_Parser_Statement_Tokenizer_Token_Variable |
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{ |
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return $this->variables->getByIndex($index); |
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} |
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/** |
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* Retrieves a string literal by its position in the command's parameters. |
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* Returns null if there is no parameter at the specified index, or |
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* if it is of another type. |
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* |
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* @param int $index Zero-based index. |
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* @return Mailcode_Parser_Statement_Tokenizer_Token_StringLiteral|NULL |
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*/ |
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public function getStringLiteralByIndex(int $index): ?Mailcode_Parser_Statement_Tokenizer_Token_StringLiteral |
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{ |
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$token = $this->getTokenByIndex($index); |
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if ($token instanceof Mailcode_Parser_Statement_Tokenizer_Token_StringLiteral) { |
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return $token; |
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} |
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return null; |
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} |
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/** |
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* Retrieves a keyword by its position in the command's parameters. |
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* Returns null if there is no parameter at the specified index, or |
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* if it is of another type. |
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* |
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* @param int $index Zero-based index. |
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* @return Mailcode_Parser_Statement_Tokenizer_Token_Keyword|NULL |
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*/ |
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public function getKeywordByIndex(int $index): ?Mailcode_Parser_Statement_Tokenizer_Token_Keyword |
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{ |
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return $this->keywords->getByIndex($index); |
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} |
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/** |
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* Retrieves an operand by its position in the command's parameters. |
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* Returns null if there is no parameter at the specified index, or |
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* if it is of another type. |
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* |
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* @param int $index Zero-based index. |
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* @return Mailcode_Parser_Statement_Tokenizer_Token_Operand|NULL |
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*/ |
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public function getOperandByIndex(int $index): ?Mailcode_Parser_Statement_Tokenizer_Token_Operand |
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{ |
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$token = $this->getTokenByIndex($index); |
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if ($token instanceof Mailcode_Parser_Statement_Tokenizer_Token_Operand) { |
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return $token; |
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} |
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return null; |
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} |
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/** |
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* Retrieves a parameter token by its position in the command's parameters, |
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* regardless of its type. Returns null if there is no parameter at the |
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* specified index. |
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* |
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* @param int $index Zero-based index. |
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* @return Mailcode_Parser_Statement_Tokenizer_Token|NULL |
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*/ |
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public function getTokenByIndex(int $index): ?Mailcode_Parser_Statement_Tokenizer_Token |
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{ |
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$tokens = $this->tokenizer->getTokens(); |
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if (isset($tokens[$index])) { |
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return $tokens[$index]; |
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} |
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return null; |
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} |
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public function getTokenForKeyWord(string $keywordName): ?Mailcode_Parser_Statement_Tokenizer_Token |
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{ |
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$tokens = $this->tokenizer->getTokens(); |
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for ($index = 0; $index < count($tokens); $index++) { |
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$token = $tokens[$index]; |
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if ($token instanceof Mailcode_Parser_Statement_Tokenizer_Token_Keyword) { |
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if ($token->getKeyword() == $keywordName) { |
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$tokenIndex = $index + 1; |
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if (isset($tokens[$tokenIndex])) { |
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return $tokens[$tokenIndex]; |
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} |
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} |
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} |
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} |
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return null; |
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} |
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public function hasTokenAtIndex(int $index): bool |
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{ |
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$tokens = $this->tokenizer->getTokens(); |
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return isset($tokens[$index]); |
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} |
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/** |
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* Retrieves all tokens. |
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* @return Mailcode_Parser_Statement_Tokenizer_Token[] |
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*/ |
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public function getTokens(): array |
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{ |
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return $this->tokenizer->getTokens(); |
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} |
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/** |
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* Retrieves all string literals that were found in the command. |
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* @return Mailcode_Parser_Statement_Tokenizer_Token_StringLiteral[] |
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*/ |
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public function getStringLiterals(): array |
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{ |
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$result = array(); |
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$tokens = $this->tokenizer->getTokens(); |
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foreach ($tokens as $token) { |
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if ($token instanceof Mailcode_Parser_Statement_Tokenizer_Token_StringLiteral) { |
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$result[] = $token; |
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} |
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} |
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return $result; |
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} |
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public function createPruner(): Mailcode_Parser_Statement_Info_Pruner |
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{ |
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return new Mailcode_Parser_Statement_Info_Pruner($this); |
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} |
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/** |
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* @return Mailcode_Parser_Statement_Tokenizer_Token_Keyword[] |
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*/ |
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public function getKeywords(): array |
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{ |
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return $this->keywords->getAll(); |
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} |
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public function getKeywordsCollection(): Mailcode_Parser_Statement_Info_Keywords |
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{ |
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return $this->keywords; |
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} |
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/** |
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* Adds or removes a keyword depending on whether it should be enabled. |
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* |
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* @param string $keyword The keyword name, with or without : |
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* @param bool $enabled |
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* @return Mailcode_Parser_Statement_Info |
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* @throws Mailcode_Parser_Exception |
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*/ |
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public function setKeywordEnabled(string $keyword, bool $enabled): Mailcode_Parser_Statement_Info |
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{ |
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$this->keywords->setEnabled($keyword, $enabled); |
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return $this; |
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} |
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/** |
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* Adds a keyword to the command. |
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* |
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* @param string $keyword Keyword name, with or without : |
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* @return $this |
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* @throws Mailcode_Parser_Exception |
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*/ |
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public function addKeyword(string $keyword): Mailcode_Parser_Statement_Info |
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{ |
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$this->keywords->add($keyword); |
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return $this; |
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} |
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/** |
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* Removes a keyword from the command, if it has one. |
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* Has no effect otherwise. |
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* |
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* @param string $keyword Keyword name, with or without : |
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* @return $this |
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*/ |
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public function removeKeyword(string $keyword): Mailcode_Parser_Statement_Info |
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{ |
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$this->keywords->remove($keyword); |
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return $this; |
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} |
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/** |
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* Whether the command has the specified keyword. |
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* |
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* @param string $keyword Keyword name, with or without : |
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* @return bool |
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*/ |
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public function hasKeyword(string $keyword): bool |
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{ |
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return $this->keywords->hasKeyword($keyword); |
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} |
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public function removeToken(Mailcode_Parser_Statement_Tokenizer_Token $token): void |
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{ |
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$this->tokenizer->removeToken($token); |
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} |
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public function addStringLiteral(string $text): Mailcode_Parser_Statement_Tokenizer_Token_StringLiteral |
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{ |
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return $this->tokenizer->appendStringLiteral($text); |
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} |
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public function prependStringLiteral(string $text): Mailcode_Parser_Statement_Tokenizer_Token_StringLiteral |
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{ |
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return $this->tokenizer->prependStringLiteral($text); |
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} |
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} |
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If the size of the collection does not change during the iteration, it is generally a good practice to compute it beforehand, and not on each iteration: