| // RUN: rm -rf %t |
| // RUN: mkdir -p %t |
| // RUN: split-file %s %t |
| // |
| // RUN: %clang_cc1 -std=c++20 -emit-module-interface %t/Cache.cppm -o %t/Cache.pcm |
| // RUN: %clang_cc1 -std=c++20 %t/Use.cpp -fmodule-file=Fibonacci.Cache=%t/Cache.pcm \ |
| // RUN: -fsyntax-only -verify |
| |
| // RUN: %clang_cc1 -std=c++20 -emit-reduced-module-interface %t/Cache.cppm -o %t/Cache.pcm |
| // RUN: %clang_cc1 -std=c++20 %t/Use.cpp -fmodule-file=Fibonacci.Cache=%t/Cache.pcm \ |
| // RUN: -fsyntax-only -verify |
| |
| //--- Cache.cppm |
| export module Fibonacci.Cache; |
| |
| export namespace Fibonacci |
| { |
| constexpr unsigned long Recursive(unsigned long n) |
| { |
| if (n == 0) |
| return 0; |
| if (n == 1) |
| return 1; |
| return Recursive(n - 2) + Recursive(n - 1); |
| } |
| |
| template<unsigned long N> |
| struct Number{}; |
| |
| struct DefaultStrategy |
| { |
| constexpr unsigned long operator()(unsigned long n, auto... other) const |
| { |
| return (n + ... + other); |
| } |
| }; |
| |
| constexpr unsigned long Compute(Number<10ul>, auto strategy) |
| { |
| return strategy(Recursive(10ul)); |
| } |
| |
| template<unsigned long N, typename Strategy = DefaultStrategy> |
| constexpr unsigned long Cache = Compute(Number<N>{}, Strategy{}); |
| |
| template constexpr unsigned long Cache<10ul>; |
| } |
| |
| //--- Use.cpp |
| // expected-no-diagnostics |
| import Fibonacci.Cache; |
| |
| constexpr bool value = Fibonacci::Cache<10ul> == 55; |
| |
| static_assert(value == true, ""); |