/wp-content/plugins/mailpoet/vendor-prefixed/twig/twig/src/Lexer.php

<?php
namespace MailPoetVendor\Twig;
if (!defined('ABSPATH')) exit;
use MailPoetVendor\Twig\Error\SyntaxError;
class Lexer
{
 private $tokens;
 private $code;
 private $cursor;
 private $lineno;
 private $end;
 private $state;
 private $states;
 private $brackets;
 private $env;
 private $source;
 private $options;
 private $regexes;
 private $position;
 private $positions;
 private $currentVarBlockLine;
 public const STATE_DATA = 0;
 public const STATE_BLOCK = 1;
 public const STATE_VAR = 2;
 public const STATE_STRING = 3;
 public const STATE_INTERPOLATION = 4;
 public const REGEX_NAME = '/[a-zA-Z_\\x7f-\\xff][a-zA-Z0-9_\\x7f-\\xff]*/A';
 public const REGEX_NUMBER = '/[0-9]+(?:\\.[0-9]+)?([Ee][\\+\\-][0-9]+)?/A';
 public const REGEX_STRING = '/"([^#"\\\\]*(?:\\\\.[^#"\\\\]*)*)"|\'([^\'\\\\]*(?:\\\\.[^\'\\\\]*)*)\'/As';
 public const REGEX_DQ_STRING_DELIM = '/"/A';
 public const REGEX_DQ_STRING_PART = '/[^#"\\\\]*(?:(?:\\\\.|#(?!\\{))[^#"\\\\]*)*/As';
 public const PUNCTUATION = '()[]{}?:.,|';
 public function __construct(Environment $env, array $options = [])
 {
 $this->env = $env;
 $this->options = \array_merge(['tag_comment' => ['{#', '#}'], 'tag_block' => ['{%', '%}'], 'tag_variable' => ['{{', '}}'], 'whitespace_trim' => '-', 'whitespace_line_trim' => '~', 'whitespace_line_chars' => ' \\t\\0\\x0B', 'interpolation' => ['#{', '}']], $options);
 // when PHP 7.3 is the min version, we will be able to remove the '#' part in preg_quote as it's part of the default
 $this->regexes = [
 // }}
 'lex_var' => '{
 \\s*
 (?:' . \preg_quote($this->options['whitespace_trim'] . $this->options['tag_variable'][1], '#') . '\\s*' . '|' . \preg_quote($this->options['whitespace_line_trim'] . $this->options['tag_variable'][1], '#') . '[' . $this->options['whitespace_line_chars'] . ']*' . '|' . \preg_quote($this->options['tag_variable'][1], '#') . ')
 }Ax',
 // %}
 'lex_block' => '{
 \\s*
 (?:' . \preg_quote($this->options['whitespace_trim'] . $this->options['tag_block'][1], '#') . '\\s*\\n?' . '|' . \preg_quote($this->options['whitespace_line_trim'] . $this->options['tag_block'][1], '#') . '[' . $this->options['whitespace_line_chars'] . ']*' . '|' . \preg_quote($this->options['tag_block'][1], '#') . '\\n?' . ')
 }Ax',
 // {% endverbatim %}
 'lex_raw_data' => '{' . \preg_quote($this->options['tag_block'][0], '#') . '(' . $this->options['whitespace_trim'] . '|' . $this->options['whitespace_line_trim'] . ')?\\s*endverbatim\\s*' . '(?:' . \preg_quote($this->options['whitespace_trim'] . $this->options['tag_block'][1], '#') . '\\s*' . '|' . \preg_quote($this->options['whitespace_line_trim'] . $this->options['tag_block'][1], '#') . '[' . $this->options['whitespace_line_chars'] . ']*' . '|' . \preg_quote($this->options['tag_block'][1], '#') . ')
 }sx',
 'operator' => $this->getOperatorRegex(),
 // #}
 'lex_comment' => '{
 (?:' . \preg_quote($this->options['whitespace_trim'] . $this->options['tag_comment'][1], '#') . '\\s*\\n?' . '|' . \preg_quote($this->options['whitespace_line_trim'] . $this->options['tag_comment'][1], '#') . '[' . $this->options['whitespace_line_chars'] . ']*' . '|' . \preg_quote($this->options['tag_comment'][1], '#') . '\\n?' . ')
 }sx',
 // verbatim %}
 'lex_block_raw' => '{
 \\s*verbatim\\s*
 (?:' . \preg_quote($this->options['whitespace_trim'] . $this->options['tag_block'][1], '#') . '\\s*' . '|' . \preg_quote($this->options['whitespace_line_trim'] . $this->options['tag_block'][1], '#') . '[' . $this->options['whitespace_line_chars'] . ']*' . '|' . \preg_quote($this->options['tag_block'][1], '#') . ')
 }Asx',
 'lex_block_line' => '{\\s*line\\s+(\\d+)\\s*' . \preg_quote($this->options['tag_block'][1], '#') . '}As',
 // {{ or {% or {#
 'lex_tokens_start' => '{
 (' . \preg_quote($this->options['tag_variable'][0], '#') . '|' . \preg_quote($this->options['tag_block'][0], '#') . '|' . \preg_quote($this->options['tag_comment'][0], '#') . ')(' . \preg_quote($this->options['whitespace_trim'], '#') . '|' . \preg_quote($this->options['whitespace_line_trim'], '#') . ')?
 }sx',
 'interpolation_start' => '{' . \preg_quote($this->options['interpolation'][0], '#') . '\\s*}A',
 'interpolation_end' => '{\\s*' . \preg_quote($this->options['interpolation'][1], '#') . '}A',
 ];
 }
 public function tokenize(Source $source)
 {
 $this->source = $source;
 $this->code = \str_replace(["\r\n", "\r"], "\n", $source->getCode());
 $this->cursor = 0;
 $this->lineno = 1;
 $this->end = \strlen($this->code);
 $this->tokens = [];
 $this->state = self::STATE_DATA;
 $this->states = [];
 $this->brackets = [];
 $this->position = -1;
 // find all token starts in one go
 \preg_match_all($this->regexes['lex_tokens_start'], $this->code, $matches, \PREG_OFFSET_CAPTURE);
 $this->positions = $matches;
 while ($this->cursor < $this->end) {
 // dispatch to the lexing functions depending
 // on the current state
 switch ($this->state) {
 case self::STATE_DATA:
 $this->lexData();
 break;
 case self::STATE_BLOCK:
 $this->lexBlock();
 break;
 case self::STATE_VAR:
 $this->lexVar();
 break;
 case self::STATE_STRING:
 $this->lexString();
 break;
 case self::STATE_INTERPOLATION:
 $this->lexInterpolation();
 break;
 }
 }
 $this->pushToken(
 -1
 );
 if (!empty($this->brackets)) {
 list($expect, $lineno) = \array_pop($this->brackets);
 throw new SyntaxError(\sprintf('Unclosed "%s".', $expect), $lineno, $this->source);
 }
 return new TokenStream($this->tokens, $this->source);
 }
 private function lexData()
 {
 // if no matches are left we return the rest of the template as simple text token
 if ($this->position == \count($this->positions[0]) - 1) {
 $this->pushToken(
 0,
 \substr($this->code, $this->cursor)
 );
 $this->cursor = $this->end;
 return;
 }
 // Find the first token after the current cursor
 $position = $this->positions[0][++$this->position];
 while ($position[1] < $this->cursor) {
 if ($this->position == \count($this->positions[0]) - 1) {
 return;
 }
 $position = $this->positions[0][++$this->position];
 }
 // push the template text first
 $text = $textContent = \substr($this->code, $this->cursor, $position[1] - $this->cursor);
 // trim?
 if (isset($this->positions[2][$this->position][0])) {
 if ($this->options['whitespace_trim'] === $this->positions[2][$this->position][0]) {
 // whitespace_trim detected ({%-, {{- or {#-)
 $text = \rtrim($text);
 } elseif ($this->options['whitespace_line_trim'] === $this->positions[2][$this->position][0]) {
 // whitespace_line_trim detected ({%~, {{~ or {#~)
 // don't trim \r and \n
 $text = \rtrim($text, " \t\x00\v");
 }
 }
 $this->pushToken(
 0,
 $text
 );
 $this->moveCursor($textContent . $position[0]);
 switch ($this->positions[1][$this->position][0]) {
 case $this->options['tag_comment'][0]:
 $this->lexComment();
 break;
 case $this->options['tag_block'][0]:
 // raw data?
 if (\preg_match($this->regexes['lex_block_raw'], $this->code, $match, 0, $this->cursor)) {
 $this->moveCursor($match[0]);
 $this->lexRawData();
 // {% line \d+ %}
 } elseif (\preg_match($this->regexes['lex_block_line'], $this->code, $match, 0, $this->cursor)) {
 $this->moveCursor($match[0]);
 $this->lineno = (int) $match[1];
 } else {
 $this->pushToken(
 1
 );
 $this->pushState(self::STATE_BLOCK);
 $this->currentVarBlockLine = $this->lineno;
 }
 break;
 case $this->options['tag_variable'][0]:
 $this->pushToken(
 2
 );
 $this->pushState(self::STATE_VAR);
 $this->currentVarBlockLine = $this->lineno;
 break;
 }
 }
 private function lexBlock()
 {
 if (empty($this->brackets) && \preg_match($this->regexes['lex_block'], $this->code, $match, 0, $this->cursor)) {
 $this->pushToken(
 3
 );
 $this->moveCursor($match[0]);
 $this->popState();
 } else {
 $this->lexExpression();
 }
 }
 private function lexVar()
 {
 if (empty($this->brackets) && \preg_match($this->regexes['lex_var'], $this->code, $match, 0, $this->cursor)) {
 $this->pushToken(
 4
 );
 $this->moveCursor($match[0]);
 $this->popState();
 } else {
 $this->lexExpression();
 }
 }
 private function lexExpression()
 {
 // whitespace
 if (\preg_match('/\\s+/A', $this->code, $match, 0, $this->cursor)) {
 $this->moveCursor($match[0]);
 if ($this->cursor >= $this->end) {
 throw new SyntaxError(\sprintf('Unclosed "%s".', self::STATE_BLOCK === $this->state ? 'block' : 'variable'), $this->currentVarBlockLine, $this->source);
 }
 }
 // arrow function
 if ('=' === $this->code[$this->cursor] && '>' === $this->code[$this->cursor + 1]) {
 $this->pushToken(Token::ARROW_TYPE, '=>');
 $this->moveCursor('=>');
 } elseif (\preg_match($this->regexes['operator'], $this->code, $match, 0, $this->cursor)) {
 $this->pushToken(
 8,
 \preg_replace('/\\s+/', ' ', $match[0])
 );
 $this->moveCursor($match[0]);
 } elseif (\preg_match(self::REGEX_NAME, $this->code, $match, 0, $this->cursor)) {
 $this->pushToken(
 5,
 $match[0]
 );
 $this->moveCursor($match[0]);
 } elseif (\preg_match(self::REGEX_NUMBER, $this->code, $match, 0, $this->cursor)) {
 $number = (float) $match[0];
 // floats
 if (\ctype_digit($match[0]) && $number <= \PHP_INT_MAX) {
 $number = (int) $match[0];
 // integers lower than the maximum
 }
 $this->pushToken(
 6,
 $number
 );
 $this->moveCursor($match[0]);
 } elseif (\false !== \strpos(self::PUNCTUATION, $this->code[$this->cursor])) {
 // opening bracket
 if (\false !== \strpos('([{', $this->code[$this->cursor])) {
 $this->brackets[] = [$this->code[$this->cursor], $this->lineno];
 } elseif (\false !== \strpos(')]}', $this->code[$this->cursor])) {
 if (empty($this->brackets)) {
 throw new SyntaxError(\sprintf('Unexpected "%s".', $this->code[$this->cursor]), $this->lineno, $this->source);
 }
 list($expect, $lineno) = \array_pop($this->brackets);
 if ($this->code[$this->cursor] != \strtr($expect, '([{', ')]}')) {
 throw new SyntaxError(\sprintf('Unclosed "%s".', $expect), $lineno, $this->source);
 }
 }
 $this->pushToken(
 9,
 $this->code[$this->cursor]
 );
 ++$this->cursor;
 } elseif (\preg_match(self::REGEX_STRING, $this->code, $match, 0, $this->cursor)) {
 $this->pushToken(
 7,
 \stripcslashes(\substr($match[0], 1, -1))
 );
 $this->moveCursor($match[0]);
 } elseif (\preg_match(self::REGEX_DQ_STRING_DELIM, $this->code, $match, 0, $this->cursor)) {
 $this->brackets[] = ['"', $this->lineno];
 $this->pushState(self::STATE_STRING);
 $this->moveCursor($match[0]);
 } else {
 throw new SyntaxError(\sprintf('Unexpected character "%s".', $this->code[$this->cursor]), $this->lineno, $this->source);
 }
 }
 private function lexRawData()
 {
 if (!\preg_match($this->regexes['lex_raw_data'], $this->code, $match, \PREG_OFFSET_CAPTURE, $this->cursor)) {
 throw new SyntaxError('Unexpected end of file: Unclosed "verbatim" block.', $this->lineno, $this->source);
 }
 $text = \substr($this->code, $this->cursor, $match[0][1] - $this->cursor);
 $this->moveCursor($text . $match[0][0]);
 // trim?
 if (isset($match[1][0])) {
 if ($this->options['whitespace_trim'] === $match[1][0]) {
 // whitespace_trim detected ({%-, {{- or {#-)
 $text = \rtrim($text);
 } else {
 // whitespace_line_trim detected ({%~, {{~ or {#~)
 // don't trim \r and \n
 $text = \rtrim($text, " \t\x00\v");
 }
 }
 $this->pushToken(
 0,
 $text
 );
 }
 private function lexComment()
 {
 if (!\preg_match($this->regexes['lex_comment'], $this->code, $match, \PREG_OFFSET_CAPTURE, $this->cursor)) {
 throw new SyntaxError('Unclosed comment.', $this->lineno, $this->source);
 }
 $this->moveCursor(\substr($this->code, $this->cursor, $match[0][1] - $this->cursor) . $match[0][0]);
 }
 private function lexString()
 {
 if (\preg_match($this->regexes['interpolation_start'], $this->code, $match, 0, $this->cursor)) {
 $this->brackets[] = [$this->options['interpolation'][0], $this->lineno];
 $this->pushToken(
 10
 );
 $this->moveCursor($match[0]);
 $this->pushState(self::STATE_INTERPOLATION);
 } elseif (\preg_match(self::REGEX_DQ_STRING_PART, $this->code, $match, 0, $this->cursor) && \strlen($match[0]) > 0) {
 $this->pushToken(
 7,
 \stripcslashes($match[0])
 );
 $this->moveCursor($match[0]);
 } elseif (\preg_match(self::REGEX_DQ_STRING_DELIM, $this->code, $match, 0, $this->cursor)) {
 list($expect, $lineno) = \array_pop($this->brackets);
 if ('"' != $this->code[$this->cursor]) {
 throw new SyntaxError(\sprintf('Unclosed "%s".', $expect), $lineno, $this->source);
 }
 $this->popState();
 ++$this->cursor;
 } else {
 // unlexable
 throw new SyntaxError(\sprintf('Unexpected character "%s".', $this->code[$this->cursor]), $this->lineno, $this->source);
 }
 }
 private function lexInterpolation()
 {
 $bracket = \end($this->brackets);
 if ($this->options['interpolation'][0] === $bracket[0] && \preg_match($this->regexes['interpolation_end'], $this->code, $match, 0, $this->cursor)) {
 \array_pop($this->brackets);
 $this->pushToken(
 11
 );
 $this->moveCursor($match[0]);
 $this->popState();
 } else {
 $this->lexExpression();
 }
 }
 private function pushToken($type, $value = '')
 {
 // do not push empty text tokens
 if (0 === $type && '' === $value) {
 return;
 }
 $this->tokens[] = new Token($type, $value, $this->lineno);
 }
 private function moveCursor($text)
 {
 $this->cursor += \strlen($text);
 $this->lineno += \substr_count($text, "\n");
 }
 private function getOperatorRegex()
 {
 $operators = \array_merge(['='], \array_keys($this->env->getUnaryOperators()), \array_keys($this->env->getBinaryOperators()));
 $operators = \array_combine($operators, \array_map('strlen', $operators));
 \arsort($operators);
 $regex = [];
 foreach ($operators as $operator => $length) {
 // an operator that ends with a character must be followed by
 // a whitespace, a parenthesis, an opening map [ or sequence {
 $r = \preg_quote($operator, '/');
 if (\ctype_alpha($operator[$length - 1])) {
 $r .= '(?=[\\s()\\[{])';
 }
 // an operator that begins with a character must not have a dot or pipe before
 if (\ctype_alpha($operator[0])) {
 $r = '(?<![\\.\\|])' . $r;
 }
 // an operator with a space can be any amount of whitespaces
 $r = \preg_replace('/\\s+/', '\\s+', $r);
 $regex[] = $r;
 }
 return '/' . \implode('|', $regex) . '/A';
 }
 private function pushState($state)
 {
 $this->states[] = $this->state;
 $this->state = $state;
 }
 private function popState()
 {
 if (0 === \count($this->states)) {
 throw new \LogicException('Cannot pop state without a previous state.');
 }
 $this->state = \array_pop($this->states);
 }
}
\class_alias('MailPoetVendor\\Twig\\Lexer', 'MailPoetVendor\\Twig_Lexer');