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Allow simple uses of Self in impls. (#3824)

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Per #3714, some of the details here are not yet settled. In particular,
we might want `Self` to come into scope at the start of the definition,
not at the `as` keyword. However, this change allows us to accept the
uncontroversial examples.
This commit is contained in:
Richard Smith
2024-03-27 22:52:45 +00:00
committed by GitHub
parent a79027120a
commit e8cc089b2b
6 changed files with 240 additions and 71 deletions
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toolchain/check/testdata/function/builtin/call_from_operator.carbon
Vendored
+7 -4
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@@ -19,7 +19,7 @@ import Core;
// TODO: This should be in `Core`, but currently impl lookup only looks in the
// current file.
impl i32 as Core.Add {
fn Op[self: i32](other: i32) -> i32 = "int.add";
fn Op[self: Self](other: Self) -> Self = "int.add";
}
var arr: [i32; 1 + 2] = (3, 4, 3 + 4);
@@ -125,10 +125,13 @@ var arr: [i32; 1 + 2] = (3, 4, 3 + 4);
// CHECK:STDOUT:
// CHECK:STDOUT: impl @impl: i32 as Add {
// CHECK:STDOUT: %Op: <function> = fn_decl @Op.1 [template] {
// CHECK:STDOUT: %Self.ref.loc7_15: type = name_ref Self, i32 [template = i32]
// CHECK:STDOUT: %self.loc7_9.1: i32 = param self
// CHECK:STDOUT: %self.loc7_9.2: i32 = bind_name self, %self.loc7_9.1
// CHECK:STDOUT: %other.loc7_20.1: i32 = param other
// CHECK:STDOUT: %other.loc7_20.2: i32 = bind_name other, %other.loc7_20.1
// CHECK:STDOUT: %Self.ref.loc7_28: type = name_ref Self, i32 [template = i32]
// CHECK:STDOUT: %other.loc7_21.1: i32 = param other
// CHECK:STDOUT: %other.loc7_21.2: i32 = bind_name other, %other.loc7_21.1
// CHECK:STDOUT: %Self.ref.loc7_37: type = name_ref Self, i32 [template = i32]
// CHECK:STDOUT: %return.var: ref i32 = var <return slot>
// CHECK:STDOUT: }
// CHECK:STDOUT: %.1: <witness> = interface_witness (%Op) [template = constants.%.2]
@@ -138,7 +141,7 @@ var arr: [i32; 1 + 2] = (3, 4, 3 + 4);
// CHECK:STDOUT: witness = %.1
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Op.1[@impl.%self.loc7_9.2: i32](@impl.%other.loc7_20.2: i32) -> i32 = "int.add";
// CHECK:STDOUT: fn @Op.1[@impl.%self.loc7_9.2: i32](@impl.%other.loc7_21.2: i32) -> i32 = "int.add";
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Op.2[%self: Self](%other: Self) -> Self;
// CHECK:STDOUT: