comparison vendor/nikic/php-parser/UPGRADE-1.0.md @ 0:c75dbcec494b

Initial commit from drush-created site

+Upgrading from PHP-Parser 0.9 to 1.0
+====================================
+
+### PHP version requirements
+
+PHP-Parser now requires PHP 5.3 or newer to run. It is however still possible to *parse* PHP 5.2 source code, while
+running on a newer version.
+
+### Move to namespaced names
+
+The library has been moved to use namespaces with the `PhpParser` vendor prefix. However, the old names using
+underscores are still available as aliases, as such most code should continue running on the new version without
+further changes.
+
+Old (still works, but discouraged):
+
+```php
+$parser = new \PHPParser_Parser(new \PHPParser_Lexer_Emulative);
+$prettyPrinter = new \PHPParser_PrettyPrinter_Default;
+```
+
+New:
+
+```php
+$parser = new \PhpParser\Parser(new PhpParser\Lexer\Emulative);
+$prettyPrinter = new \PhpParser\PrettyPrinter\Standard;
+```
+
+Note that the `PHPParser` prefix was changed to `PhpParser`. While PHP class names are technically case-insensitive,
+the autoloader will not be able to load `PHPParser\Parser` or other case variants.
+
+Due to conflicts with reserved keywords, some class names now end with an underscore, e.g. `PHPParser_Node_Stmt_Class`
+is now `PhpParser\Node\Stmt\Class_`. (But as usual, the old name is still available.)
+
+### Changes to `Node::getType()`
+
+The `Node::getType()` method continues to return names using underscores instead of namespace separators and also does
+not contain the trailing underscore that may be present in the class name. As such its output will not change in many
+cases.
+
+However, some node classes have been moved to a different namespace or renamed, which will result in a different
+`Node::getType()` output:
+
+```
+Expr_AssignBitwiseAnd => Expr_AssignOp_BitwiseAnd
+Expr_AssignBitwiseOr  => Expr_AssignOp_BitwiseOr
+Expr_AssignBitwiseXor => Expr_AssignOp_BitwiseXor
+Expr_AssignConcat     => Expr_AssignOp_Concat
+Expr_AssignDiv        => Expr_AssignOp_Div
+Expr_AssignMinus      => Expr_AssignOp_Minus
+Expr_AssignMod        => Expr_AssignOp_Mod
+Expr_AssignMul        => Expr_AssignOp_Mul
+Expr_AssignPlus       => Expr_AssignOp_Plus
+Expr_AssignShiftLeft  => Expr_AssignOp_ShiftLeft
+Expr_AssignShiftRight => Expr_AssignOp_ShiftRight
+
+Expr_BitwiseAnd       => Expr_BinaryOp_BitwiseAnd
+Expr_BitwiseOr        => Expr_BinaryOp_BitwiseOr
+Expr_BitwiseXor       => Expr_BinaryOp_BitwiseXor
+Expr_BooleanAnd       => Expr_BinaryOp_BooleanAnd
+Expr_BooleanOr        => Expr_BinaryOp_BooleanOr
+Expr_Concat           => Expr_BinaryOp_Concat
+Expr_Div              => Expr_BinaryOp_Div
+Expr_Equal            => Expr_BinaryOp_Equal
+Expr_Greater          => Expr_BinaryOp_Greater
+Expr_GreaterOrEqual   => Expr_BinaryOp_GreaterOrEqual
+Expr_Identical        => Expr_BinaryOp_Identical
+Expr_LogicalAnd       => Expr_BinaryOp_LogicalAnd
+Expr_LogicalOr        => Expr_BinaryOp_LogicalOr
+Expr_LogicalXor       => Expr_BinaryOp_LogicalXor
+Expr_Minus            => Expr_BinaryOp_Minus
+Expr_Mod              => Expr_BinaryOp_Mod
+Expr_Mul              => Expr_BinaryOp_Mul
+Expr_NotEqual         => Expr_BinaryOp_NotEqual
+Expr_NotIdentical     => Expr_BinaryOp_NotIdentical
+Expr_Plus             => Expr_BinaryOp_Plus
+Expr_ShiftLeft        => Expr_BinaryOp_ShiftLeft
+Expr_ShiftRight       => Expr_BinaryOp_ShiftRight
+Expr_Smaller          => Expr_BinaryOp_Smaller
+Expr_SmallerOrEqual   => Expr_BinaryOp_SmallerOrEqual
+
+Scalar_ClassConst     => Scalar_MagicConst_Class
+Scalar_DirConst       => Scalar_MagicConst_Dir
+Scalar_FileConst      => Scalar_MagicConst_File
+Scalar_FuncConst      => Scalar_MagicConst_Function
+Scalar_LineConst      => Scalar_MagicConst_Line
+Scalar_MethodConst    => Scalar_MagicConst_Method
+Scalar_NSConst        => Scalar_MagicConst_Namespace
+Scalar_TraitConst     => Scalar_MagicConst_Trait
+```
+
+These changes may affect custom pretty printers and code comparing the return value of `Node::getType()` to specific
+strings.
+
+### Miscellaneous
+
+  * The classes `Template` and `TemplateLoader` have been removed. You should use some other [code generation][code_gen]
+    project built on top of PHP-Parser instead.
+
+  * The `PrettyPrinterAbstract::pStmts()` method now emits a leading newline if the statement list is not empty.
+    Custom pretty printers should remove the explicit newline before `pStmts()` calls.
+
+    Old:
+
+    ```php
+    public function pStmt_Trait(PHPParser_Node_Stmt_Trait $node) {
+        return 'trait ' . $node->name
+             . "\n" . '{' . "\n" . $this->pStmts($node->stmts) . "\n" . '}';
+    }
+    ```
+
+    New:
+
+    ```php
+    public function pStmt_Trait(Stmt\Trait_ $node) {
+        return 'trait ' . $node->name
+             . "\n" . '{' . $this->pStmts($node->stmts) . "\n" . '}';
+    }
+    ```
+
+  [code_gen]: https://github.com/nikic/PHP-Parser/wiki/Projects-using-the-PHP-Parser#code-generation