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Nikita Popov 2017-04-28 21:23:55 +02:00
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UPGRADE-4.0.md
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@ -8,6 +8,36 @@ source code, while running on a newer version.
### Changes to the node structure
* Many subnodes that previously held simple strings now store `Identifier` nodes instead (or
`VarLikeIdentifier` nodes if they have form `$ident`). The constructors of the affected nodes will
automatically convert strings to `Identifier`s and `Identifier`s implement `__toString()`. As such
some code continues without changes, but anything using `is_string()`, type-strict comparisons or
strict-mode may require adjustment. The following is an exhaustive list of all affected subnodes:
* `Const::$name`
* `NullableType::$type` (for simple types)
* `Param::$type` (for simple types)
* `Expr\ClassConstFetch::$name`
* `Expr\Closure::$returnType` (for simple types)
* `Expr\MethodCall::$name`
* `Expr\PropertyFetch::$name`
* `Expr\StaticCall::$name`
* `Expr\StaticPropertyFetch::$name` (uses `VarLikeIdentifier`)
* `Stmt\Class_::$name`
* `Stmt\ClassMethod::$name`
* `Stmt\ClassMethod::$returnType` (for simple types)
* `Stmt\Function::$name`
* `Stmt\Function::$returnType` (for simple types)
* `Stmt\Goto_::$name`
* `Stmt\Interface_::$name`
* `Stmt\Label::$name`
* `Stmt\PropertyProperty::$name` (uses `VarLikeIdentifier`)
* `Stmt\TraitUseAdaptation\Alias::$method`
* `Stmt\TraitUseAdaptation\Alias::$newName`
* `Stmt\TraitUseAdaptation\Precedence::$method`
* `Stmt\Trait_::$name`
* `Stmt\UseUse::$alias`
* Expression statements (`expr;`) are now represented using a `Stmt\Expression` node. Previously
these statements were directly represented as their constituent expression.
* The `name` subnode of `Param` has been renamed to `var` and now contains a `Variable` rather than
@ -16,6 +46,9 @@ source code, while running on a newer version.
than a plain string.
* The `var` subnode of `ClosureUse` now contains a `Variable` rather than a plain string.
* The `var` subnode of `Catch` now contains a `Variable` rather than a plain string.
* The `alias` subnode of `UseUse` can is now `null` if no explicit alias is given. As such,
`use Foo\Bar` and `use Foo\Bar as Bar` are now represented differently. The `getAlias()` method
can be used to get the effective alias, even if it is not explicitly given.
### Removed functionality