mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-02 17:52:58 +01:00
Richard Smith
41ed82e033
Add a `Core.String` class to the prelude representing a string view, and rename the `String` keyword to `str` and make it evaluate to `Core.String`. `Core.String` is represented as a pair of a pointer to a character (actually, to the first character of a string, but we don't have a way of modeling that yet) and a size (which should be pointer-width, but is currently always a `u64` as we don't have a `usize` equivalent yet). `Core.String` values are generated directly by the toolchain for string literal expressions. This follows the direction established at the recent summit, but the design implemented here has not been through the proposal process yet.
80 lines
3.5 KiB
Plaintext
80 lines
3.5 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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// This is an integration test for the Core.String in the prelude, so use the
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// real prelude.
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// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/full.carbon
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// EXTRA-ARGS: --target=x86_64-linux-gnu
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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/lower/testdata/primitives/string.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/lower/testdata/primitives/string.carbon
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fn F(s: str);
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fn G() {
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F("Hello");
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}
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fn H() {
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// This can reuse the same string literal object.
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let v: str = "Hello";
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F(v);
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}
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fn I() {
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// This can't.
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let v: str = "World";
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F(v);
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}
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// CHECK:STDOUT: ; ModuleID = 'string.carbon'
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// CHECK:STDOUT: source_filename = "string.carbon"
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// CHECK:STDOUT:
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// CHECK:STDOUT: @0 = private unnamed_addr constant [6 x i8] c"Hello\00", align 1
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// CHECK:STDOUT: @1 = private unnamed_addr constant [6 x i8] c"World\00", align 1
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// CHECK:STDOUT: @String.val.13d.String.val = internal constant { ptr, i64 } { ptr @0, i64 5 }
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// CHECK:STDOUT: @String.val.afc.String.val = internal constant { ptr, i64 } { ptr @1, i64 5 }
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// CHECK:STDOUT:
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// CHECK:STDOUT: declare void @_CF.Main(ptr)
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// CHECK:STDOUT:
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// CHECK:STDOUT: define void @_CG.Main() !dbg !4 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: call void @_CF.Main(ptr @String.val.13d.String.val), !dbg !7
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// CHECK:STDOUT: ret void, !dbg !8
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: define void @_CH.Main() !dbg !9 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: call void @_CF.Main(ptr @String.val.13d.String.val), !dbg !10
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// CHECK:STDOUT: ret void, !dbg !11
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: define void @_CI.Main() !dbg !12 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: call void @_CF.Main(ptr @String.val.afc.String.val), !dbg !13
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// CHECK:STDOUT: ret void, !dbg !14
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: !llvm.module.flags = !{!0, !1}
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// CHECK:STDOUT: !llvm.dbg.cu = !{!2}
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// CHECK:STDOUT:
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// CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
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// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
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// CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
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// CHECK:STDOUT: !3 = !DIFile(filename: "string.carbon", directory: "")
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// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "G", linkageName: "_CG.Main", scope: null, file: !3, line: 18, type: !5, spFlags: DISPFlagDefinition, unit: !2)
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// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
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// CHECK:STDOUT: !6 = !{}
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// CHECK:STDOUT: !7 = !DILocation(line: 19, column: 3, scope: !4)
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// CHECK:STDOUT: !8 = !DILocation(line: 18, column: 1, scope: !4)
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// CHECK:STDOUT: !9 = distinct !DISubprogram(name: "H", linkageName: "_CH.Main", scope: null, file: !3, line: 22, type: !5, spFlags: DISPFlagDefinition, unit: !2)
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// CHECK:STDOUT: !10 = !DILocation(line: 25, column: 3, scope: !9)
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// CHECK:STDOUT: !11 = !DILocation(line: 22, column: 1, scope: !9)
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// CHECK:STDOUT: !12 = distinct !DISubprogram(name: "I", linkageName: "_CI.Main", scope: null, file: !3, line: 28, type: !5, spFlags: DISPFlagDefinition, unit: !2)
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// CHECK:STDOUT: !13 = !DILocation(line: 31, column: 3, scope: !12)
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// CHECK:STDOUT: !14 = !DILocation(line: 28, column: 1, scope: !12)
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