mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-29 14:04:57 +01:00
Geoff RomerandRichard Smith
e023f75254
The bulk of this change is changing most pattern insts to be `Always` rather than `AlwaysUnique` constants, so that they can be wrapped in `SpecificConstant`s to perform substitution. That then lets thunking rely much more on `SpecificConstant` wrappers instead of deep-copying the inst tree with modified types. This approach to thunking should scale better, particularly as things like form generics make function signatures more complex, because we can leverage the existing support for constant evaluation and substitution. Unfortunately, applying this approach to binding patterns will require more work; see the TODO near the top of `thunk.cpp` for details. --------- Co-authored-by: Richard Smith <richard@metafoo.co.uk>
136 lines
6.0 KiB
Plaintext
136 lines
6.0 KiB
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/none.carbon
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//
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// AUTOUPDATE
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// TIP: To test this file alone, run:
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// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/patterns/expression.carbon
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// TIP: To dump output, run:
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// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/patterns/expression.carbon
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// --- fail_todo_let.carbon
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library "[[@TEST_NAME]]";
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// TODO: We should reject this for using a refutable pattern in an irrefutable pattern context.
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let a: () = ();
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// CHECK:STDERR: fail_todo_let.carbon:[[@LINE+4]]:5: error: semantics TODO: `expression pattern` [SemanticsTodo]
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// CHECK:STDERR: let a = ();
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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let a = ();
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// --- fail_todo_in_tuple.carbon
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library "[[@TEST_NAME]]";
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// TODO: We should reject this for using a refutable pattern in an irrefutable pattern context.
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let a: () = ();
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// CHECK:STDERR: fail_todo_in_tuple.carbon:[[@LINE+4]]:13: error: semantics TODO: `expression pattern` [SemanticsTodo]
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// CHECK:STDERR: let (b: (), a, c: ()) = ((), (), ());
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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let (b: (), a, c: ()) = ((), (), ());
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// --- fail_todo_in_function_param.carbon
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library "[[@TEST_NAME]]";
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// TODO: We should reject this for using a refutable pattern in an irrefutable pattern context.
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let a: () = ();
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// CHECK:STDERR: fail_todo_in_function_param.carbon:[[@LINE+4]]:6: error: semantics TODO: `expression pattern` [SemanticsTodo]
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// CHECK:STDERR: fn F(a) {}
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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fn F(a) {}
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// --- fail_todo_parens.carbon
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library "[[@TEST_NAME]]";
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let a: () = ();
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// TODO: Replace this with a valid expression pattern once we support refutable
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// pattern contexts.
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// Note that this is a parenthesized zero-tuple expression pattern, not a
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// one-tuple pattern containing a zero-tuple.
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// CHECK:STDERR: fail_todo_parens.carbon:[[@LINE+4]]:6: error: semantics TODO: `expression pattern` [SemanticsTodo]
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// CHECK:STDERR: let (a) = ();
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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let (a) = ();
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// --- fail_todo_control_flow.carbon
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library "[[@TEST_NAME]]";
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fn F() {
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// TODO: Replace this with a valid expression pattern once we support refutable
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// pattern contexts.
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//@dump-sem-ir-begin
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// CHECK:STDERR: fail_todo_control_flow.carbon:[[@LINE+8]]:8: error: semantics TODO: `expression pattern` [SemanticsTodo]
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// CHECK:STDERR: let (if true then true else false, true and true) = (true, true);
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// CHECK:STDERR:
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// CHECK:STDERR: fail_todo_control_flow.carbon:[[@LINE+4]]:38: error: semantics TODO: `expression pattern` [SemanticsTodo]
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// CHECK:STDERR: let (if true then true else false, true and true) = (true, true);
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// CHECK:STDERR: ^~~~~~~~~~~~~
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// CHECK:STDERR:
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let (if true then true else false, true and true) = (true, true);
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//@dump-sem-ir-end
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}
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// CHECK:STDOUT: --- fail_todo_control_flow.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %true: bool = bool_literal true [concrete]
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// CHECK:STDOUT: %false: bool = bool_literal false [concrete]
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// CHECK:STDOUT: %pattern_type.831: type = pattern_type bool [concrete]
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// CHECK:STDOUT: %tuple.type: type = tuple_type (bool, bool) [concrete]
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// CHECK:STDOUT: %pattern_type.860: type = pattern_type %tuple.type [concrete]
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// CHECK:STDOUT: %.2f0: %pattern_type.860 = tuple_pattern (@F.%expr_patt.loc16_26, @F.%expr_patt.loc16_43) [concrete]
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// CHECK:STDOUT: %tuple: %tuple.type = tuple_value (%true, %true) [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @F() {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: name_binding_decl {
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// CHECK:STDOUT: %expr_patt.loc16_26: %pattern_type.831 = expr_pattern %.loc16_8 in [concrete] {
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// CHECK:STDOUT: %true.loc16_11: bool = bool_literal true [concrete = constants.%true]
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// CHECK:STDOUT: if %true.loc16_11 br !if.expr.then else br !if.expr.else
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// CHECK:STDOUT:
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// CHECK:STDOUT: !if.expr.then:
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// CHECK:STDOUT: %true.loc16_21: bool = bool_literal true [concrete = constants.%true]
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// CHECK:STDOUT: br !if.expr.result(%true.loc16_21)
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// CHECK:STDOUT:
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// CHECK:STDOUT: !if.expr.else:
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// CHECK:STDOUT: %false.loc16_31: bool = bool_literal false [concrete = constants.%false]
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// CHECK:STDOUT: br !if.expr.result(%false.loc16_31)
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// CHECK:STDOUT:
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// CHECK:STDOUT: !if.expr.result:
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// CHECK:STDOUT: %.loc16_8: bool = block_arg !if.expr.result [concrete = constants.%true]
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// CHECK:STDOUT: <elided>
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %expr_patt.loc16_43: %pattern_type.831 = expr_pattern %.loc16_43 in [concrete] {
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// CHECK:STDOUT: %true.loc16_38: bool = bool_literal true [concrete = constants.%true]
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// CHECK:STDOUT: %false.loc16_43: bool = bool_literal false [concrete = constants.%false]
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// CHECK:STDOUT: if %true.loc16_38 br !and.rhs else br !.loc16(%false.loc16_43)
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// CHECK:STDOUT:
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// CHECK:STDOUT: !and.rhs:
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// CHECK:STDOUT: %true.loc16_47: bool = bool_literal true [concrete = constants.%true]
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// CHECK:STDOUT: br !.loc16(%true.loc16_47)
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// CHECK:STDOUT:
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// CHECK:STDOUT: !.loc16:
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// CHECK:STDOUT: %.loc16_43: bool = block_arg !.loc16 [concrete = constants.%true]
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// CHECK:STDOUT: <elided>
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %.loc16_51: %pattern_type.860 = tuple_pattern (%expr_patt.loc16_26, %expr_patt.loc16_43) [concrete = constants.%.2f0]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %true.loc16_56: bool = bool_literal true [concrete = constants.%true]
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// CHECK:STDOUT: %true.loc16_62: bool = bool_literal true [concrete = constants.%true]
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// CHECK:STDOUT: %.loc16_66: %tuple.type = tuple_literal (%true.loc16_56, %true.loc16_62) [concrete = constants.%tuple]
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// CHECK:STDOUT: <elided>
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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