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* doc/invoke.texi: Document -std=c++17 and -std=gnu++17 and document
[official-gcc.git]
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gcc
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testsuite
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g++.dg
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cpp1z
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fold7a.C
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5c782ff0969e1f623d52f9e5d62ff50a11b0f748
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// This macro should not be defined without -std=c++17.
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#ifdef __cpp_fold_expressions
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#error __cpp_fold_expressions defined
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#endif