基础代码

2021-02-26 22:23:13 +08:00
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+<?php
+/**
+ * PHPCompatibility, an external standard for PHP_CodeSniffer.
+ *
+ * @package   PHPCompatibility
+ * @copyright 2012-2019 PHPCompatibility Contributors
+ * @license   https://opensource.org/licenses/LGPL-3.0 LGPL3
+ * @link      https://github.com/PHPCompatibility/PHPCompatibility
+ */
+
+namespace PHPCompatibility\Sniffs\Syntax;
+
+use PHPCompatibility\Sniff;
+use PHP_CodeSniffer_File as File;
+use PHP_CodeSniffer_Tokens as Tokens;
+
+/**
+ * Using the spread operator for unpacking arrays in array expressions is available since PHP 7.4.
+ *
+ * PHP version 7.4
+ *
+ * @link https://www.php.net/manual/en/migration74.new-features.php#migration74.new-features.core.unpack-inside-array
+ * @link https://wiki.php.net/rfc/spread_operator_for_array
+ *
+ * @since 9.2.0
+ */
+class NewArrayUnpackingSniff extends Sniff
+{
+
+    /**
+     * Returns an array of tokens this test wants to listen for.
+     *
+     * @since 9.2.0
+     *
+     * @return array
+     */
+    public function register()
+    {
+        return array(
+            \T_ARRAY,
+            \T_OPEN_SHORT_ARRAY,
+        );
+    }
+
+    /**
+     * Processes this test, when one of its tokens is encountered.
+     *
+     * @since 9.2.0
+     *
+     * @param \PHP_CodeSniffer_File $phpcsFile The file being scanned.
+     * @param int                   $stackPtr  The position of the current token in the
+     *                                         stack passed in $tokens.
+     *
+     * @return void
+     */
+    public function process(File $phpcsFile, $stackPtr)
+    {
+        if ($this->supportsBelow('7.3') === false) {
+            return;
+        }
+
+        $tokens = $phpcsFile->getTokens();
+
+        /*
+         * Determine the array opener & closer.
+         */
+        $closer = $phpcsFile->numTokens;
+        if ($tokens[$stackPtr]['code'] === \T_ARRAY) {
+            if (isset($tokens[$stackPtr]['parenthesis_opener']) === false) {
+                return;
+            }
+
+            $opener = $tokens[$stackPtr]['parenthesis_opener'];
+
+            if (isset($tokens[$opener]['parenthesis_closer'])) {
+                $closer = $tokens[$opener]['parenthesis_closer'];
+            }
+        } else {
+            // Short array syntax.
+            $opener = $stackPtr;
+
+            if (isset($tokens[$stackPtr]['bracket_closer'])) {
+                $closer = $tokens[$stackPtr]['bracket_closer'];
+            }
+        }
+
+        $nestingLevel = 0;
+        if (isset($tokens[($opener + 1)]['nested_parenthesis'])) {
+            $nestingLevel = count($tokens[($opener + 1)]['nested_parenthesis']);
+        }
+
+        for ($i = $opener; $i < $closer;) {
+            $i = $phpcsFile->findNext(array(\T_ELLIPSIS, \T_OPEN_SHORT_ARRAY, \T_ARRAY), ($i + 1), $closer);
+            if ($i === false) {
+                return;
+            }
+
+            if ($tokens[$i]['code'] === \T_OPEN_SHORT_ARRAY) {
+                if (isset($tokens[$i]['bracket_closer']) === false) {
+                    // Live coding, unfinished nested array, handle this when the array opener
+                    // of the nested array is passed.
+                    return;
+                }
+
+                // Skip over nested short arrays. These will be handled when the array opener
+                // of the nested array is passed.
+                $i = $tokens[$i]['bracket_closer'];
+                continue;
+            }
+
+            if ($tokens[$i]['code'] === \T_ARRAY) {
+                if (isset($tokens[$i]['parenthesis_closer']) === false) {
+                    // Live coding, unfinished nested array, handle this when the array opener
+                    // of the nested array is passed.
+                    return;
+                }
+
+                // Skip over nested long arrays. These will be handled when the array opener
+                // of the nested array is passed.
+                $i = $tokens[$i]['parenthesis_closer'];
+                continue;
+            }
+
+            // Ensure this is not function call variable unpacking.
+            if (isset($tokens[$i]['nested_parenthesis'])
+                && count($tokens[$i]['nested_parenthesis']) > $nestingLevel
+            ) {
+                continue;
+            }
+
+            // Ok, found one.
+            $nextNonEmpty = $phpcsFile->findNext(Tokens::$emptyTokens, ($i + 1), null, true);
+            $snippet      = trim($phpcsFile->getTokensAsString($i, (($nextNonEmpty - $i) + 1)));
+            $phpcsFile->addError(
+                'Array unpacking within array declarations using the spread operator is not supported in PHP 7.3 or earlier. Found: %s',
+                $i,
+                'Found',
+                array($snippet)
+            );
+        }
+    }
+}