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27 lines
473 B
SAS
27 lines
473 B
SAS
/**
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@file mf_isblank.sas
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@brief Checks whether a macro variable is empty (blank)
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@details Simply performs:
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%sysevalf(%superq(param)=,boolean)
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Usage:
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%put mf_isblank(&var);
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inspiration:
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https://support.sas.com/resources/papers/proceedings09/022-2009.pdf
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@param param VALUE to be checked
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@return output returns 1 (if blank) else 0
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@version 9.2
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**/
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%macro mf_isblank(param
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)/*/STORE SOURCE*/;
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%sysevalf(%superq(param)=,boolean)
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%mend; |