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Make type contexts expect a value of type Type. (#2357)

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In particular, this means that a type can implement `ImplicitAs(Type)` and have values of that type behave like types.

This implies that `()` and `{}` are no longer types. They are now values whose type is the result of converting `()` or `{}` to type `Type`, as has been discussed recently and seems to be the supported direction. This fixes various cases where these types were previously mishandled.
This commit is contained in:
Richard Smith
2022-10-28 08:20:49 -07:00
committed by GitHub
parent f46eaf49a2
commit 0219218b01
40 changed files with 674 additions and 319 deletions
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explorer/testdata/basic_syntax/fail_nested_binding.carbon
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@@ -9,7 +9,7 @@
package ExplorerTest api;
fn Main() -> i32 {
// CHECK:STDERR: COMPILATION ERROR: {{.*}}/explorer/testdata/basic_syntax/fail_nested_binding.carbon:[[@LINE+1]]: The type of a binding pattern cannot contain bindings.
// CHECK:STDERR: COMPILATION ERROR: {{.*}}/explorer/testdata/basic_syntax/fail_nested_binding.carbon:[[@LINE+1]]: the type of a binding pattern cannot contain bindings
var x: (T: Type) = 1;
return 1;
}