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Fixed warning on platforms where char is unsigned [#CLICKHOUSE-2]
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@ -109,7 +109,7 @@ inline bool isWhitespaceASCII(char c)
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inline bool isControlASCII(char c)
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{
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return c >= 0 && c <= 31;
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return static_cast<unsigned char>(c) <= 31;
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}
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/// Works assuming isAlphaASCII.
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