Support construction of DeclSyntax subtypes from string interpolation
#2032
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Allow the creation of e.g. an `ExtensionDeclSyntax` as
```swift
let extension = try ExtensionDeclSyntax("extension Foo: Proto {}")
```
The initializer throws if the string describes a declaration other than an 'extension'. If the string can get parsed as an extension but contains syntax errors, we return a node that contains syntax errors. This matches the behavior of the `HasTrailingCodeBlock` intializers that take a header + result builder.
|
@swift-ci Please test |
rintaro
reviewed
Aug 8, 2023
Comment on lines
+20
to
+21
| public protocol DeclSyntaxParseable: DeclSyntaxProtocol {} | ||
| public extension DeclSyntaxParseable { |
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What is the reason init(_ stringInterpolation: SyntaxNodeString) can't be just in extension DeclSyntaxProtocol?
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Because, for example, AccessorDeclSyntax does not go through parseDecl, it has its own parser entry function. And thus, trying to call parser.parseDecl and casting it to AccessorDeclSyntax wouldn’t work.
bnbarham
approved these changes
Aug 9, 2023
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Allow the creation of e.g. an
ExtensionDeclSyntaxasThe initializer throws if the string describes a declaration other than an 'extension'. If the string can get parsed as an extension but contains syntax errors, we return a node that contains syntax errors. This matches the behavior of the
HasTrailingCodeBlockintializers that take a header + result builder.