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Make C++ types impl Core.Default. (#6962)

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C++ classes that are default-constructible now implement `Core.Default`
by calling the default constructor.
This commit is contained in:
Richard Smith
2026-03-25 21:07:24 +00:00
committed by GitHub
parent 311670c84a
commit 37b238fa28
49 changed files with 1069 additions and 426 deletions
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toolchain/check/testdata/array/basics.carbon
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+5 -5
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@@ -232,15 +232,15 @@ var a: array(1, 1);
// CHECK:STDOUT: %array_type: type = array_type %int_3, %empty_tuple.type [concrete]
// CHECK:STDOUT: %pattern_type.035: type = pattern_type %array_type [concrete]
// CHECK:STDOUT: %DefaultOrUnformed.type: type = facet_type <@DefaultOrUnformed> [concrete]
// CHECK:STDOUT: %T: type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %T.as.DefaultOrUnformed.impl.Op.type.6c6: type = fn_type @T.as.DefaultOrUnformed.impl.Op, @T.as.DefaultOrUnformed.impl(%T) [symbolic]
// CHECK:STDOUT: %T.67d: type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %T.as.DefaultOrUnformed.impl.Op.type.6c6: type = fn_type @T.as.DefaultOrUnformed.impl.Op, @T.as.DefaultOrUnformed.impl(%T.67d) [symbolic]
// CHECK:STDOUT: %T.as.DefaultOrUnformed.impl.Op.ae1: %T.as.DefaultOrUnformed.impl.Op.type.6c6 = struct_value () [symbolic]
// CHECK:STDOUT: %DefaultOrUnformed.impl_witness.924: <witness> = impl_witness imports.%DefaultOrUnformed.impl_witness_table, @T.as.DefaultOrUnformed.impl(%array_type) [concrete]
// CHECK:STDOUT: %DefaultOrUnformed.impl_witness.924: <witness> = impl_witness imports.%DefaultOrUnformed.impl_witness_table.349, @T.as.DefaultOrUnformed.impl(%array_type) [concrete]
// CHECK:STDOUT: %DefaultOrUnformed.facet.86d: %DefaultOrUnformed.type = facet_value %array_type, (%DefaultOrUnformed.impl_witness.924) [concrete]
// CHECK:STDOUT: %tuple.type: type = tuple_type (%empty_tuple.type, %empty_tuple.type, %empty_tuple.type) [concrete]
// CHECK:STDOUT: %tuple: %tuple.type = tuple_value (%empty_tuple, %empty_tuple, %empty_tuple) [concrete]
// CHECK:STDOUT: %pattern_type.8c1: type = pattern_type %tuple.type [concrete]
// CHECK:STDOUT: %DefaultOrUnformed.impl_witness.032: <witness> = impl_witness imports.%DefaultOrUnformed.impl_witness_table, @T.as.DefaultOrUnformed.impl(%tuple.type) [concrete]
// CHECK:STDOUT: %DefaultOrUnformed.impl_witness.032: <witness> = impl_witness imports.%DefaultOrUnformed.impl_witness_table.349, @T.as.DefaultOrUnformed.impl(%tuple.type) [concrete]
// CHECK:STDOUT: %DefaultOrUnformed.facet.1ea: %DefaultOrUnformed.type = facet_value %tuple.type, (%DefaultOrUnformed.impl_witness.032) [concrete]
// CHECK:STDOUT: %Destroy.Op.type.bae255.1: type = fn_type @Destroy.Op.loc8 [concrete]
// CHECK:STDOUT: %Destroy.Op.651ba6.1: %Destroy.Op.type.bae255.1 = struct_value () [concrete]
@@ -250,7 +250,7 @@ var a: array(1, 1);
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core.import_ref.01d: @T.as.DefaultOrUnformed.impl.%T.as.DefaultOrUnformed.impl.Op.type (%T.as.DefaultOrUnformed.impl.Op.type.6c6) = import_ref Core//prelude/parts/default, loc{{\d+_\d+}}, loaded [symbolic = @T.as.DefaultOrUnformed.impl.%T.as.DefaultOrUnformed.impl.Op (constants.%T.as.DefaultOrUnformed.impl.Op.ae1)]
// CHECK:STDOUT: %DefaultOrUnformed.impl_witness_table = impl_witness_table (%Core.import_ref.01d), @T.as.DefaultOrUnformed.impl [concrete]
// CHECK:STDOUT: %DefaultOrUnformed.impl_witness_table.349 = impl_witness_table (%Core.import_ref.01d), @T.as.DefaultOrUnformed.impl [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @G() {