r314373 - [NFC] Don't use C++17 standard lib variable template helper traits, instead use ::value.

[James Y Knight via cfe-commits]

This still doesn't work on some compilers, because
std::is_trivially_copyable isn't available:
http://lab.llvm.org:8011/builders/aosp-O3-polly-before-vectorizer-unprofitable/builds/265/steps/build/logs/stdio

On Wed, Sep 27, 2017 at 10:00 PM, Faisal Vali via cfe-commits <
cfe-commits at lists.llvm.org> wrote:

> Author: faisalv
> Date: Wed Sep 27 19:00:40 2017
> New Revision: 314373
>
> URL: http://llvm.org/viewvc/llvm-project?rev=314373&view=rev
> Log:
> [NFC] Don't use C++17 standard lib variable template helper traits,
> instead use ::value.
>
> Modified:
>     cfe/trunk/lib/Lex/MacroArgs.cpp
>
> Modified: cfe/trunk/lib/Lex/MacroArgs.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Lex/
> MacroArgs.cpp?rev=314373&r1=314372&r2=314373&view=diff
> ============================================================
> ==================
> --- cfe/trunk/lib/Lex/MacroArgs.cpp (original)
> +++ cfe/trunk/lib/Lex/MacroArgs.cpp Wed Sep 27 19:00:40 2017
> @@ -62,7 +62,7 @@ MacroArgs *MacroArgs::create(const Macro
>
>    // Copy the actual unexpanded tokens to immediately after the result
> ptr.
>    if (!UnexpArgTokens.empty()) {
> -    static_assert(std::is_trivially_copyable_v<Token>,
> +    static_assert(std::is_trivially_copyable<Token>::value,
>                    "assume trivial copyability if copying into the "
>                    "uninitialized array (as opposed to reusing a cached "
>                    "MacroArgs)");
> @@ -96,7 +96,7 @@ MacroArgs *MacroArgs::deallocate() {
>    // Run the dtor to deallocate the vectors.
>    this->~MacroArgs();
>    // Release the memory for the object.
> -  static_assert(std::is_trivially_destructible_v<Token>,
> +  static_assert(std::is_trivially_destructible<Token>::value,
>                  "assume trivially destructible and forego destructors");
>    free(this);
>
>
>
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