mirror of
https://github.com/carbon-language/carbon-lang.git
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Richard Smith
2e65d28a16
Allow passing a C++ template as a template template argument to another C++ template. Does not allow passing a Carbon generic as an argument. Depends on #6474.
119 lines
4.8 KiB
Plaintext
119 lines
4.8 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/convert.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/interop/cpp/template/template_template_param.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/interop/cpp/template/template_template_param.carbon
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// --- templates.h
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template<typename> struct A {};
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template<typename> struct B {};
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template<typename, typename> struct C {};
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template<template<typename> typename, template<typename> typename>
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struct TwoTemplates {};
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// --- valid.carbon
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library "[[@TEST_NAME]]";
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import Cpp library "templates.h";
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//@dump-sem-ir-begin
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var x: Cpp.TwoTemplates(Cpp.A, Cpp.B);
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//@dump-sem-ir-end
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// --- fail_template_mismatch.carbon
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library "[[@TEST_NAME]]";
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import Cpp library "templates.h";
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//@dump-sem-ir-begin
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// CHECK:STDERR: fail_template_mismatch.carbon:[[@LINE+15]]:35: error: too few template arguments for class template 'C' [CppInteropParseError]
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// CHECK:STDERR: 22 | var x: Cpp.TwoTemplates(Cpp.A, Cpp.C);
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// CHECK:STDERR: | ^
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// CHECK:STDERR: fail_template_mismatch.carbon:[[@LINE+12]]:35: note: template template argument has different template parameters than its corresponding template template parameter [CppInteropParseNote]
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// CHECK:STDERR: 22 | var x: Cpp.TwoTemplates(Cpp.A, Cpp.C);
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// CHECK:STDERR: | ^
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// CHECK:STDERR: fail_template_mismatch.carbon:[[@LINE-9]]:10: in file included here [InCppInclude]
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// CHECK:STDERR: ./templates.h:6:66: note: previous template template parameter is here [CppInteropParseNote]
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// CHECK:STDERR: 6 | template<template<typename> typename, template<typename> typename>
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// CHECK:STDERR: | ~~~~~~~~~~~~~~~~~~ ^
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// CHECK:STDERR: fail_template_mismatch.carbon:[[@LINE-13]]:10: in file included here [InCppInclude]
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// CHECK:STDERR: ./templates.h:4:37: note: template is declared here [CppInteropParseNote]
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// CHECK:STDERR: 4 | template<typename, typename> struct C {};
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// CHECK:STDERR: | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^
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// CHECK:STDERR:
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var x: Cpp.TwoTemplates(Cpp.A, Cpp.C);
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//@dump-sem-ir-end
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// --- fail_type_argument.carbon
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library "[[@TEST_NAME]]";
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import Cpp library "templates.h";
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class X {}
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// CHECK:STDERR: fail_type_argument.carbon:[[@LINE+4]]:32: error: template argument for template template parameter must be a class template or type alias template [CppInteropParseError]
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// CHECK:STDERR: 12 | var x: Cpp.TwoTemplates(Cpp.A, X);
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// CHECK:STDERR: | ^
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// CHECK:STDERR:
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var x: Cpp.TwoTemplates(Cpp.A, X);
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// --- fail_non_type_argument.carbon
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library "[[@TEST_NAME]]";
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import Cpp library "templates.h";
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// CHECK:STDERR: fail_non_type_argument.carbon:[[@LINE+4]]:32: error: template argument for template template parameter must be a class template or type alias template [CppInteropParseError]
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// CHECK:STDERR: 10 | var x: Cpp.TwoTemplates(Cpp.A, true);
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// CHECK:STDERR: | ^
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// CHECK:STDERR:
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var x: Cpp.TwoTemplates(Cpp.A, true);
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// CHECK:STDOUT: --- valid.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %TwoTemplates: type = class_type @TwoTemplates [concrete]
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// CHECK:STDOUT: %pattern_type: type = pattern_type %TwoTemplates [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: imports {
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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: name_binding_decl {
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// CHECK:STDOUT: %x.patt: %pattern_type = ref_binding_pattern x [concrete]
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// CHECK:STDOUT: %x.var_patt: %pattern_type = var_pattern %x.patt [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %x.var: ref %TwoTemplates = var %x.var_patt [concrete]
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// CHECK:STDOUT: %x: ref %TwoTemplates = ref_binding x, %x.var [concrete = %x.var]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: --- fail_template_mismatch.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: imports {
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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: name_binding_decl {
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// CHECK:STDOUT: %x.patt: <error> = ref_binding_pattern x [concrete]
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// CHECK:STDOUT: %x.var_patt: <error> = var_pattern %x.patt [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %x.var: ref <error> = var %x.var_patt [concrete = <error>]
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// CHECK:STDOUT: %x: ref <error> = ref_binding x, <error> [concrete = <error>]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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