mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-05 22:02:55 +01:00
Dana Jansens
fcae9610bd
The type `type` is now a `FacetType` inst with no constraints. This brings the model implemented in the toolchain into better alignment with the language design. The `SemIR::TypeType` struct remains as a scope for holding the `TypeInstId`, `ConstantId`, and `TypeId` constants, but is not an `InstKind` anymore. The `TypeType` inst looks a lot like singletons, but there are many `FacetType` insts so it doesn't quite fit that model. So we put it alongside singletons with a fixed inst id but refer to it as a more general "builtin" inst that is not a singleton. `Namespace::PackageInstId` is similar, and we group it with `TypeType` conceptually as another builtin instruction with a fixed id. No conversion is needed anymore to use a `type` as a facet, since types also have a `FacetType` type. This simplifies and removes a number of helpers and branches throughout the code. The `TypeType` inst is now part of the constant store, so we end up printing it in the constants block in every test. But it's also named `type` rather than `%type` to preserve the majority of existing formatting behaviour, though this does look different from other constants. Assisted-by: Opus 5 was used to generate a first draft and validate the refactoring. Though nearly everything non-trivial the tool wrote has been modified or rewritten.
174 lines
6.4 KiB
Plaintext
174 lines
6.4 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/uint.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/primitives/string_literals.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/primitives/string_literals.carbon
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// --- fail_no_string.carbon
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library "[[@TEST_NAME]]";
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fn F() {
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// CHECK:STDERR: fail_no_string.carbon:[[@LINE+4]]:3: error: name `Core.String` implicitly referenced here, but not found [CoreNameNotFound]
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// CHECK:STDERR: "hello";
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// CHECK:STDERR: ^~~~~~~
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// CHECK:STDERR:
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"hello";
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}
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// --- unusual_string.carbon
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package Core library "[[@TEST_NAME]]";
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import library "prelude/parts/uint";
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class String {
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var begin: u8*;
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var end: u8*;
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}
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// --- fail_use_unusual_string.carbon
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import Core library "unusual_string";
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// CHECK:STDERR: fail_use_unusual_string.carbon:[[@LINE+4]]:14: error: unexpected representation for type `str` [StringLiteralTypeUnexpected]
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// CHECK:STDERR: let x: str = "hello";
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// CHECK:STDERR: ^~~~~~~
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// CHECK:STDERR:
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let x: str = "hello";
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// --- incomplete_string.carbon
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package Core library "[[@TEST_NAME]]";
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class String;
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// --- fail_use_incomplete_string.carbon
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library "[[@TEST_NAME]]";
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import Core library "incomplete_string";
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fn F() {
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// CHECK:STDERR: fail_use_incomplete_string.carbon:[[@LINE+7]]:3: error: type `Core.String` is incomplete [StringLiteralTypeIncomplete]
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// CHECK:STDERR: "hello";
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// CHECK:STDERR: ^~~~~~~
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// CHECK:STDERR: incomplete_string.carbon:4:1: note: class was forward declared here [ClassForwardDeclaredHere]
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// CHECK:STDERR: class String;
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// CHECK:STDERR: ^~~~~~~~~~~~~
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// CHECK:STDERR:
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"hello";
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}
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// --- small_string.carbon
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package Core library "[[@TEST_NAME]]";
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import library "prelude/parts/uint";
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class String {
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var ptr: u8*;
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// An intentionally small `size` field to test the behavior when a string
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// literal is large enough that its size can't be represented.
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var size: u8;
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}
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// --- use_small_string.carbon
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library "[[@TEST_NAME]]";
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import Core library "small_string";
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//@dump-sem-ir-begin
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let x: str = "hello";
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//@dump-sem-ir-end
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// --- fail_overfill_small_string.carbon
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library "[[@TEST_NAME]]";
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import Core library "small_string";
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//@dump-sem-ir-begin
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// CHECK:STDERR: fail_overfill_small_string.carbon:[[@LINE+4]]:14: error: string literal is too long [StringLiteralTooLong]
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// CHECK:STDERR: let x: str = '''
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// CHECK:STDERR: ^~~
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// CHECK:STDERR:
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let x: str = '''
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A string so long its size does not fit in `u8`. This results in an error,
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because we can't form a `Core.String` value that describes this string.
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This string contains 256 characters. Among them are:
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* 6 `g`s,
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* 21 `s`s,
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* 9 newlines,
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* and only one `p`.
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''';
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//@dump-sem-ir-end
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// CHECK:STDOUT: --- use_small_string.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: type: type = facet_type <type> [concrete]
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// CHECK:STDOUT: %str.3d4: type = class_type @String [concrete]
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// CHECK:STDOUT: %int_8: Core.IntLiteral = int_value 8 [concrete]
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// CHECK:STDOUT: %u8: type = class_type @UInt, @UInt(%int_8) [concrete]
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// CHECK:STDOUT: %ptr.093: type = ptr_type %u8 [concrete]
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// CHECK:STDOUT: %pattern_type.adf: type = pattern_type %str.3d4 [concrete]
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// CHECK:STDOUT: %x.patt: %pattern_type.adf = value_binding_pattern x [concrete]
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// CHECK:STDOUT: %str.f81: %ptr.093 = string_literal "hello" [concrete]
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// CHECK:STDOUT: %int_5: %u8 = int_value 5 [concrete]
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// CHECK:STDOUT: %String.val: %str.3d4 = struct_value (%str.f81, %int_5) [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: file {
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// CHECK:STDOUT: %str: type = type_literal constants.%str.3d4 [concrete = constants.%str.3d4]
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// CHECK:STDOUT: %x: %str.3d4 = wrapper_binding x, @__global_init.%String.val
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// CHECK:STDOUT: name_binding_decl {
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// CHECK:STDOUT: %x.patt: %pattern_type.adf = value_binding_pattern x [concrete = constants.%x.patt]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @__global_init() {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: %str: %ptr.093 = string_literal "hello" [concrete = constants.%str.f81]
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// CHECK:STDOUT: %int_5: %u8 = int_value 5 [concrete = constants.%int_5]
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// CHECK:STDOUT: %String.val: %str.3d4 = struct_value (%str, %int_5) [concrete = constants.%String.val]
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// CHECK:STDOUT: <elided>
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: --- fail_overfill_small_string.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: type: type = facet_type <type> [concrete]
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// CHECK:STDOUT: %str.3d4: type = class_type @String [concrete]
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// CHECK:STDOUT: %int_8: Core.IntLiteral = int_value 8 [concrete]
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// CHECK:STDOUT: %u8: type = class_type @UInt, @UInt(%int_8) [concrete]
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// CHECK:STDOUT: %ptr.093: type = ptr_type %u8 [concrete]
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// CHECK:STDOUT: %pattern_type.adf: type = pattern_type %str.3d4 [concrete]
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// CHECK:STDOUT: %x.patt: %pattern_type.adf = value_binding_pattern x [concrete]
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// CHECK:STDOUT: %str.9e7: %ptr.093 = string_literal "A string so long its size does not fit in `u8`. This results in an error,\nbecause we can't form a `Core.String` value that describes this string.\n\nThis string contains 256 characters. Among them are:\n\n* 6 `g`s,\n* 21 `s`s,\n* 9 newlines,\n* and only one `p`.\n" [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: file {
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// CHECK:STDOUT: %str: type = type_literal constants.%str.3d4 [concrete = constants.%str.3d4]
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// CHECK:STDOUT: %x: %str.3d4 = wrapper_binding x, <error> [concrete = <error>]
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// CHECK:STDOUT: name_binding_decl {
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// CHECK:STDOUT: %x.patt: %pattern_type.adf = value_binding_pattern x [concrete = constants.%x.patt]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @__global_init() {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: %str: %ptr.093 = string_literal "A string so long its size does not fit in `u8`. This results in an error,\nbecause we can't form a `Core.String` value that describes this string.\n\nThis string contains 256 characters. Among them are:\n\n* 6 `g`s,\n* 21 `s`s,\n* 9 newlines,\n* and only one `p`.\n" [concrete = constants.%str.9e7]
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// CHECK:STDOUT: <elided>
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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