structured_control_flow: Remove constexpr Flow::Block
This seems to be unsupported in newer libstdc++ versions due to Flow::Block's base class being a non-literal type. It's not clear to me why this was permitted in earlier versions.
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@ -975,13 +975,7 @@ private:
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Environment& env;
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Environment& env;
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IR::AbstractSyntaxList& syntax_list;
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IR::AbstractSyntaxList& syntax_list;
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bool uses_demote_to_helper{};
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bool uses_demote_to_helper{};
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// TODO: C++20 Remove this when all compilers support constexpr std::vector
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#if __cpp_lib_constexpr_vector >= 201907
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static constexpr Flow::Block dummy_flow_block;
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#else
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const Flow::Block dummy_flow_block;
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const Flow::Block dummy_flow_block;
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#endif
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};
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};
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} // Anonymous namespace
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} // Anonymous namespace
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