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8770c7f826
This PR refactors the ASTDumper to make it more structured, less mistake-prone, and more amenable to future changes. For example:
```cpp
// Before:
void visitUnresolvedDotExpr(UnresolvedDotExpr *E) {
printCommon(E, "unresolved_dot_expr")
<< " field '" << E->getName() << "'";
PrintWithColorRAII(OS, ExprModifierColor)
<< " function_ref=" << getFunctionRefKindStr(E->getFunctionRefKind());
if (E->getBase()) {
OS << '\n';
printRec(E->getBase());
}
PrintWithColorRAII(OS, ParenthesisColor) << ')';
}
// After:
void visitUnresolvedDotExpr(UnresolvedDotExpr *E, StringRef label) {
printCommon(E, "unresolved_dot_expr", label);
printFieldQuoted(E->getName(), "field");
printField(E->getFunctionRefKind(), "function_ref", ExprModifierColor);
if (E->getBase()) {
printRec(E->getBase());
}
printFoot();
}
```
* Values are printed through calls to base class methods, rather than direct access to the underlying `raw_ostream`.
* These methods tend to reduce the chances of bugs like missing/extra spaces or newlines, too much/too little indentation, etc.
* More values are quoted, and unprintable/non-ASCII characters in quoted values are escaped before printing.
* Infrastructure to label child nodes now exists.
* Some weird breaks from the normal "style", like `PatternBindingDecl`'s original and processed initializers, have been brought into line.
* Some types that previously used ad-hoc dumping functions, like conformances and substitution maps, are now structured similarly to the dumper classes.
* I've fixed the odd dumping bug along the way. For example, distributed actors were only marked `actor`, not `distributed actor`.
This PR doesn't change the overall style of AST dumps; they're still pseudo-S-expressions. But the logic that implements this style is now isolated into a relatively small base class, making it feasible to introduce e.g. JSON dumping in the future.
32 lines
694 B
Swift
32 lines
694 B
Swift
// RUN: %target-swift-frontend -dump-ast %s | %FileCheck %s
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// https://github.com/apple/swift/issues/60806
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struct Foo<T> {
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init(_: (T) -> Void) {}
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}
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protocol Bar {}
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enum Baz: Bar {
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case someCase(Int)
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}
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enum NonBarBaz {
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case someCase(Int)
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}
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let _: Foo<Bar> = Foo<Bar> { (a: Bar) -> Void in
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switch a {
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// CHECK: (pattern_is type="any Bar" cast_kind=value_cast cast_to="Baz"
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// CHECK-NEXT: (pattern_enum_element type="Baz" element="Baz.someCase"
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case let .someCase(value) as Baz:
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print(value)
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// expected-warning@-1 {{cast from 'any Bar' to unrelated type 'NonBarBaz' always fails}}
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case let .someCase(value) as NonBarBaz:
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print(value)
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default:
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break
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}
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}
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