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348 lines
13 KiB
348 lines
13 KiB
<?php
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namespace PhpParser;
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use PhpParser\Node\Expr;
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use PhpParser\Node\Stmt;
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abstract class PrettyPrinterAbstract
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{
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protected $precedenceMap = array(
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// [precedence, associativity] where for the latter -1 is %left, 0 is %nonassoc and 1 is %right
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'Expr_BinaryOp_Pow' => array( 0, 1),
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'Expr_BitwiseNot' => array( 10, 1),
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'Expr_PreInc' => array( 10, 1),
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'Expr_PreDec' => array( 10, 1),
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'Expr_PostInc' => array( 10, -1),
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'Expr_PostDec' => array( 10, -1),
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'Expr_UnaryPlus' => array( 10, 1),
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'Expr_UnaryMinus' => array( 10, 1),
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'Expr_Cast_Int' => array( 10, 1),
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'Expr_Cast_Double' => array( 10, 1),
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'Expr_Cast_String' => array( 10, 1),
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'Expr_Cast_Array' => array( 10, 1),
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'Expr_Cast_Object' => array( 10, 1),
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'Expr_Cast_Bool' => array( 10, 1),
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'Expr_Cast_Unset' => array( 10, 1),
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'Expr_ErrorSuppress' => array( 10, 1),
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'Expr_Instanceof' => array( 20, 0),
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'Expr_BooleanNot' => array( 30, 1),
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'Expr_BinaryOp_Mul' => array( 40, -1),
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'Expr_BinaryOp_Div' => array( 40, -1),
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'Expr_BinaryOp_Mod' => array( 40, -1),
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'Expr_BinaryOp_Plus' => array( 50, -1),
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'Expr_BinaryOp_Minus' => array( 50, -1),
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'Expr_BinaryOp_Concat' => array( 50, -1),
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'Expr_BinaryOp_ShiftLeft' => array( 60, -1),
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'Expr_BinaryOp_ShiftRight' => array( 60, -1),
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'Expr_BinaryOp_Smaller' => array( 70, 0),
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'Expr_BinaryOp_SmallerOrEqual' => array( 70, 0),
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'Expr_BinaryOp_Greater' => array( 70, 0),
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'Expr_BinaryOp_GreaterOrEqual' => array( 70, 0),
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'Expr_BinaryOp_Equal' => array( 80, 0),
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'Expr_BinaryOp_NotEqual' => array( 80, 0),
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'Expr_BinaryOp_Identical' => array( 80, 0),
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'Expr_BinaryOp_NotIdentical' => array( 80, 0),
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'Expr_BinaryOp_Spaceship' => array( 80, 0),
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'Expr_BinaryOp_BitwiseAnd' => array( 90, -1),
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'Expr_BinaryOp_BitwiseXor' => array(100, -1),
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'Expr_BinaryOp_BitwiseOr' => array(110, -1),
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'Expr_BinaryOp_BooleanAnd' => array(120, -1),
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'Expr_BinaryOp_BooleanOr' => array(130, -1),
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'Expr_BinaryOp_Coalesce' => array(140, 1),
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'Expr_Ternary' => array(150, -1),
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// parser uses %left for assignments, but they really behave as %right
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'Expr_Assign' => array(160, 1),
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'Expr_AssignRef' => array(160, 1),
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'Expr_AssignOp_Plus' => array(160, 1),
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'Expr_AssignOp_Minus' => array(160, 1),
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'Expr_AssignOp_Mul' => array(160, 1),
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'Expr_AssignOp_Div' => array(160, 1),
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'Expr_AssignOp_Concat' => array(160, 1),
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'Expr_AssignOp_Mod' => array(160, 1),
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'Expr_AssignOp_BitwiseAnd' => array(160, 1),
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'Expr_AssignOp_BitwiseOr' => array(160, 1),
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'Expr_AssignOp_BitwiseXor' => array(160, 1),
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'Expr_AssignOp_ShiftLeft' => array(160, 1),
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'Expr_AssignOp_ShiftRight' => array(160, 1),
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'Expr_AssignOp_Pow' => array(160, 1),
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'Expr_YieldFrom' => array(165, 1),
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'Expr_Print' => array(168, 1),
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'Expr_BinaryOp_LogicalAnd' => array(170, -1),
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'Expr_BinaryOp_LogicalXor' => array(180, -1),
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'Expr_BinaryOp_LogicalOr' => array(190, -1),
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'Expr_Include' => array(200, -1),
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);
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protected $noIndentToken;
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protected $docStringEndToken;
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protected $canUseSemicolonNamespaces;
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protected $options;
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/**
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* Creates a pretty printer instance using the given options.
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*
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* Supported options:
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* * bool $shortArraySyntax = false: Whether to use [] instead of array() as the default array
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* syntax, if the node does not specify a format.
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*
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* @param array $options Dictionary of formatting options
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*/
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public function __construct(array $options = []) {
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$this->noIndentToken = '_NO_INDENT_' . mt_rand();
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$this->docStringEndToken = '_DOC_STRING_END_' . mt_rand();
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$defaultOptions = ['shortArraySyntax' => false];
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$this->options = $options + $defaultOptions;
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}
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/**
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* Pretty prints an array of statements.
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*
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* @param Node[] $stmts Array of statements
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*
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* @return string Pretty printed statements
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*/
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public function prettyPrint(array $stmts) {
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$this->preprocessNodes($stmts);
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return ltrim($this->handleMagicTokens($this->pStmts($stmts, false)));
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}
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/**
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* Pretty prints an expression.
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*
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* @param Expr $node Expression node
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*
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* @return string Pretty printed node
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*/
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public function prettyPrintExpr(Expr $node) {
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return $this->handleMagicTokens($this->p($node));
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}
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/**
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* Pretty prints a file of statements (includes the opening <?php tag if it is required).
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*
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* @param Node[] $stmts Array of statements
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*
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* @return string Pretty printed statements
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*/
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public function prettyPrintFile(array $stmts) {
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if (!$stmts) {
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return "<?php\n\n";
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}
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$p = "<?php\n\n" . $this->prettyPrint($stmts);
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if ($stmts[0] instanceof Stmt\InlineHTML) {
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$p = preg_replace('/^<\?php\s+\?>\n?/', '', $p);
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}
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if ($stmts[count($stmts) - 1] instanceof Stmt\InlineHTML) {
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$p = preg_replace('/<\?php$/', '', rtrim($p));
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}
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return $p;
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}
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/**
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* Preprocesses the top-level nodes to initialize pretty printer state.
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*
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* @param Node[] $nodes Array of nodes
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*/
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protected function preprocessNodes(array $nodes) {
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/* We can use semicolon-namespaces unless there is a global namespace declaration */
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$this->canUseSemicolonNamespaces = true;
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foreach ($nodes as $node) {
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if ($node instanceof Stmt\Namespace_ && null === $node->name) {
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$this->canUseSemicolonNamespaces = false;
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}
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}
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}
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protected function handleMagicTokens($str) {
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// Drop no-indent tokens
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$str = str_replace($this->noIndentToken, '', $str);
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// Replace doc-string-end tokens with nothing or a newline
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$str = str_replace($this->docStringEndToken . ";\n", ";\n", $str);
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$str = str_replace($this->docStringEndToken, "\n", $str);
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return $str;
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}
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/**
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* Pretty prints an array of nodes (statements) and indents them optionally.
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*
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* @param Node[] $nodes Array of nodes
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* @param bool $indent Whether to indent the printed nodes
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*
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* @return string Pretty printed statements
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*/
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protected function pStmts(array $nodes, $indent = true) {
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$result = '';
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foreach ($nodes as $node) {
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$comments = $node->getAttribute('comments', array());
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if ($comments) {
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$result .= "\n" . $this->pComments($comments);
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if ($node instanceof Stmt\Nop) {
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continue;
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}
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}
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$result .= "\n" . $this->p($node) . ($node instanceof Expr ? ';' : '');
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}
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if ($indent) {
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return preg_replace('~\n(?!$|' . $this->noIndentToken . ')~', "\n ", $result);
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} else {
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return $result;
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}
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}
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/**
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* Pretty prints a node.
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*
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* @param Node $node Node to be pretty printed
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*
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* @return string Pretty printed node
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*/
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protected function p(Node $node) {
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return $this->{'p' . $node->getType()}($node);
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}
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protected function pInfixOp($type, Node $leftNode, $operatorString, Node $rightNode) {
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list($precedence, $associativity) = $this->precedenceMap[$type];
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return $this->pPrec($leftNode, $precedence, $associativity, -1)
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. $operatorString
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. $this->pPrec($rightNode, $precedence, $associativity, 1);
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}
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protected function pPrefixOp($type, $operatorString, Node $node) {
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list($precedence, $associativity) = $this->precedenceMap[$type];
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return $operatorString . $this->pPrec($node, $precedence, $associativity, 1);
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}
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protected function pPostfixOp($type, Node $node, $operatorString) {
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list($precedence, $associativity) = $this->precedenceMap[$type];
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return $this->pPrec($node, $precedence, $associativity, -1) . $operatorString;
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}
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/**
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* Prints an expression node with the least amount of parentheses necessary to preserve the meaning.
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*
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* @param Node $node Node to pretty print
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* @param int $parentPrecedence Precedence of the parent operator
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* @param int $parentAssociativity Associativity of parent operator
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* (-1 is left, 0 is nonassoc, 1 is right)
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* @param int $childPosition Position of the node relative to the operator
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* (-1 is left, 1 is right)
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*
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* @return string The pretty printed node
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*/
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protected function pPrec(Node $node, $parentPrecedence, $parentAssociativity, $childPosition) {
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$type = $node->getType();
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if (isset($this->precedenceMap[$type])) {
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$childPrecedence = $this->precedenceMap[$type][0];
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if ($childPrecedence > $parentPrecedence
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|| ($parentPrecedence == $childPrecedence && $parentAssociativity != $childPosition)
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) {
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return '(' . $this->p($node) . ')';
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}
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}
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return $this->p($node);
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}
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/**
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* Pretty prints an array of nodes and implodes the printed values.
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*
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* @param Node[] $nodes Array of Nodes to be printed
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* @param string $glue Character to implode with
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*
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* @return string Imploded pretty printed nodes
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*/
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protected function pImplode(array $nodes, $glue = '') {
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$pNodes = array();
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foreach ($nodes as $node) {
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if (null === $node) {
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$pNodes[] = '';
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} else {
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$pNodes[] = $this->p($node);
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}
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}
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return implode($glue, $pNodes);
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}
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/**
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* Pretty prints an array of nodes and implodes the printed values with commas.
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*
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* @param Node[] $nodes Array of Nodes to be printed
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*
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* @return string Comma separated pretty printed nodes
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*/
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protected function pCommaSeparated(array $nodes) {
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return $this->pImplode($nodes, ', ');
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}
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/**
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* Pretty prints a comma-separated list of nodes in multiline style, including comments.
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*
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* The result includes a leading newline and one level of indentation (same as pStmts).
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*
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* @param Node[] $nodes Array of Nodes to be printed
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* @param bool $trailingComma Whether to use a trailing comma
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*
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* @return string Comma separated pretty printed nodes in multiline style
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*/
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protected function pCommaSeparatedMultiline(array $nodes, $trailingComma) {
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$result = '';
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$lastIdx = count($nodes) - 1;
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foreach ($nodes as $idx => $node) {
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if ($node !== null) {
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$comments = $node->getAttribute('comments', array());
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if ($comments) {
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$result .= "\n" . $this->pComments($comments);
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}
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$result .= "\n" . $this->p($node);
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} else {
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$result .= "\n";
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}
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if ($trailingComma || $idx !== $lastIdx) {
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$result .= ',';
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}
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}
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return preg_replace('~\n(?!$|' . $this->noIndentToken . ')~', "\n ", $result);
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}
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/**
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* Signals the pretty printer that a string shall not be indented.
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*
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* @param string $string Not to be indented string
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*
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* @return string String marked with $this->noIndentToken's.
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*/
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protected function pNoIndent($string) {
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return str_replace("\n", "\n" . $this->noIndentToken, $string);
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}
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/**
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* Prints reformatted text of the passed comments.
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*
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* @param Comment[] $comments List of comments
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*
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* @return string Reformatted text of comments
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*/
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protected function pComments(array $comments) {
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$formattedComments = [];
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foreach ($comments as $comment) {
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$formattedComments[] = $comment->getReformattedText();
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}
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return implode("\n", $formattedComments);
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}
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}
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