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Add framework for the extern keyword. (#3755)

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This doesn't add full support. I'm separating it out to make the effects
of the modifier changes clearer for review. I'm restructuring a little
with the expectation that we'll have some more categories of modifier
keywords in the future (similar to `extern`, these may not be in a "set"
such as access), and thus easily scaling up to a few more would be
useful.
This commit is contained in:
Jon Ross-Perkins
2024-03-08 16:01:12 +00:00
committed by GitHub
parent 56d70dc3a2
commit 096daecc57
21 changed files with 241 additions and 102 deletions
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toolchain/parse/testdata/namespace/modifiers.carbon
Vendored
+3 -2
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@@ -4,7 +4,7 @@
//
// AUTOUPDATE
private abstract base default final namespace Foo;
private extern abstract base default final namespace Foo;
impl namespace Foo;
@@ -13,12 +13,13 @@ impl namespace Foo;
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'NamespaceStart', text: 'namespace'},
// CHECK:STDOUT: {kind: 'PrivateModifier', text: 'private'},
// CHECK:STDOUT: {kind: 'ExternModifier', text: 'extern'},
// CHECK:STDOUT: {kind: 'AbstractModifier', text: 'abstract'},
// CHECK:STDOUT: {kind: 'BaseModifier', text: 'base'},
// CHECK:STDOUT: {kind: 'DefaultModifier', text: 'default'},
// CHECK:STDOUT: {kind: 'FinalModifier', text: 'final'},
// CHECK:STDOUT: {kind: 'IdentifierName', text: 'Foo'},
// CHECK:STDOUT: {kind: 'Namespace', text: ';', subtree_size: 8},
// CHECK:STDOUT: {kind: 'Namespace', text: ';', subtree_size: 9},
// CHECK:STDOUT: {kind: 'NamespaceStart', text: 'namespace'},
// CHECK:STDOUT: {kind: 'ImplModifier', text: 'impl'},
// CHECK:STDOUT: {kind: 'IdentifierName', text: 'Foo'},