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[module.unit]p1 specifies that module and import are invalid components of a module name, that module names cannot contain reserved identifiers, and that std followed by zero or more digits is reserved. The first issue (module and import pseudo-keywords) requires a diagnostic, the second issue (use of reserved identifiers) does not require a diagnostic. We diagnose both the same -- the code is ill- formed unless the module declaration is in a system "header". This allows STL implementations to use the reserved module names while preventing users from stealing them out from under us. Differential Revision: https://reviews.llvm.org/D136953
8 lines
281 B
C++
8 lines
281 B
C++
// RUN: %clang_cc1 -std=c++20 -fsyntax-only -verify %s
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// expected-no-diagnostics
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// Show that we suppress the reserved identifier diagnostic in a system header.
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# 100 "file.cpp" 1 3 // Enter a system header
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export module __test;
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# 100 "file.cpp" 2 3 // Leave the system header
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