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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/function/fail_parameter_type.carbon
Vendored
+1 -1
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@@ -9,7 +9,7 @@
package ExplorerTest api;
// 42 cannot be used as the type of a parameter.
// CHECK:STDERR: COMPILATION ERROR: {{.*}}/explorer/testdata/function/fail_parameter_type.carbon:[[@LINE+1]]: Expected a type, but got 42
// CHECK:STDERR: COMPILATION ERROR: {{.*}}/explorer/testdata/function/fail_parameter_type.carbon:[[@LINE+1]]: type error in type of name binding: 'i32' is not implicitly convertible to 'Type'
fn f(x: 42) -> i32 {
return x - 1;
}
explorer/testdata/function/fail_return_call_has_invalid_body.carbon
Vendored
+1 -1
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@@ -9,7 +9,7 @@
package EmptyIdentifier impl;
fn apply[T:! Type, U:! Type](f: T, EmptyIdentifier: U) {
// CHECK:STDERR: COMPILATION ERROR: {{.*}}/explorer/testdata/function/fail_return_call_has_invalid_body.carbon:[[@LINE+1]]: expected a tuple
// CHECK:STDERR: COMPILATION ERROR: {{.*}}/explorer/testdata/function/fail_return_call_has_invalid_body.carbon:[[@LINE+1]]: only arrays and tuples can be indexed, found bool
match (true[true]) {}
}
explorer/testdata/function/fail_var_type_is_call.carbon
Vendored
+1 -1
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@@ -13,7 +13,7 @@ fn test() -> i32 {
}
fn Main() -> i32 {
// CHECK:STDERR: COMPILATION ERROR: {{.*}}/explorer/testdata/function/fail_var_type_is_call.carbon:[[@LINE+1]]: Expected a type, but got 1
// CHECK:STDERR: COMPILATION ERROR: {{.*}}/explorer/testdata/function/fail_var_type_is_call.carbon:[[@LINE+1]]: type error in type of name binding: 'i32' is not implicitly convertible to 'Type'
var x: test() = 1;
return 0;
}
explorer/testdata/function/return_convertible_to_type.carbon
Vendored
+21
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@@ -0,0 +1,21 @@
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// AUTOUPDATE
// RUN: %{explorer-run}
// RUN: %{explorer-run-trace}
// CHECK:STDOUT: result: 0
package ExplorerTest api;
class TypeLike {
impl as ImplicitAs(Type) {
fn Convert[me: Self]() -> Type { return i32; }
}
fn Make() -> Self { return {}; }
}
fn Main() -> TypeLike.Make() {
return 0;
}