mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:02:23 +01:00
Richard Smith
f0e940ddfd
For now, a builtin function is defined by specifying a string literal initializer in a function declaration: ```carbon fn MyBuiltin(a: i32) -> i32 = "builtin.name"; ``` End-to-end support is included for a sample `"int.add"` builtin performing integer addition, covering constant evaluation and code generation. The implementation here needs substantial refactoring before we'll be ready to start adding more builtins. That refactoring work will be coming next. This change is aiming to checkpoint some incremental progress.
77 lines
3.5 KiB
Plaintext
77 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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// AUTOUPDATE
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interface I {
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// TODO: A definition without `default` in an interface should be rejected.
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fn F() {}
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fn G(a: i32, b: i32) -> i32 = "int.add";
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// TODO: An associated constant with an initializer without `default` in an
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// interface should be rejected.
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let T:! type = (i32, i32);
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let N:! i32 = 42;
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}
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// CHECK:STDOUT: --- todo_define_not_default.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %.1: type = interface_type @I [template]
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// CHECK:STDOUT: %.2: type = assoc_entity_type @I, <function> [template]
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// CHECK:STDOUT: %.3: <associated <function> in I> = assoc_entity element0, @I.%F [template]
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// CHECK:STDOUT: %.4: <associated <function> in I> = assoc_entity element1, @I.%G [template]
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// CHECK:STDOUT: %.5: type = tuple_type (type, type) [template]
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// CHECK:STDOUT: %.6: type = tuple_type (i32, i32) [template]
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// CHECK:STDOUT: %.7: type = assoc_entity_type @I, type [template]
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// CHECK:STDOUT: %.8: <associated type in I> = assoc_entity element2, @I.%T [template]
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// CHECK:STDOUT: %.9: i32 = int_literal 42 [template]
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// CHECK:STDOUT: %.10: type = assoc_entity_type @I, i32 [template]
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// CHECK:STDOUT: %.11: <associated i32 in I> = assoc_entity element3, @I.%N [template]
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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: package: <namespace> = namespace [template] {
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// CHECK:STDOUT: .I = %I.decl
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %I.decl: type = interface_decl @I [template = constants.%.1] {}
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: interface @I {
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// CHECK:STDOUT: %Self: I = bind_symbolic_name Self [symbolic]
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// CHECK:STDOUT: %F: <function> = fn_decl @F [template] {}
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// CHECK:STDOUT: %.loc9: <associated <function> in I> = assoc_entity element0, %F [template = constants.%.3]
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// CHECK:STDOUT: %G: <function> = fn_decl @G [template] {
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// CHECK:STDOUT: %a.loc10_8.1: i32 = param a
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// CHECK:STDOUT: %a.loc10_8.2: i32 = bind_name a, %a.loc10_8.1
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// CHECK:STDOUT: %b.loc10_16.1: i32 = param b
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// CHECK:STDOUT: %b.loc10_16.2: i32 = bind_name b, %b.loc10_16.1
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// CHECK:STDOUT: %return.var: ref i32 = var <return slot>
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %.loc10: <associated <function> in I> = assoc_entity element1, %G [template = constants.%.4]
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// CHECK:STDOUT: %.loc14_27.1: (type, type) = tuple_literal (i32, i32)
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// CHECK:STDOUT: %.loc14_27.2: type = converted %.loc14_27.1, constants.%.6 [template = constants.%.6]
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// CHECK:STDOUT: %T: type = assoc_const_decl T [template]
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// CHECK:STDOUT: %.loc14_28: <associated type in I> = assoc_entity element2, %T [template = constants.%.8]
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// CHECK:STDOUT: %.loc15_17: i32 = int_literal 42 [template = constants.%.9]
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// CHECK:STDOUT: %N: i32 = assoc_const_decl N [template]
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// CHECK:STDOUT: %.loc15_19: <associated i32 in I> = assoc_entity element3, %N [template = constants.%.11]
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// CHECK:STDOUT:
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// CHECK:STDOUT: !members:
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// CHECK:STDOUT: .Self = %Self
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// CHECK:STDOUT: .F = %.loc9
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// CHECK:STDOUT: .G = %.loc10
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// CHECK:STDOUT: .T = %.loc14_28
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// CHECK:STDOUT: .N = %.loc15_19
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// CHECK:STDOUT: witness = (%F, %G, %T, %N)
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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: return
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @G(@I.%a.loc10_8.2: i32, @I.%b.loc10_16.2: i32) -> i32 = "int.add";
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// CHECK:STDOUT:
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