Path Test Macro - WeAreCAS

This macro, named 'testit', is designed to illustrate the behavior of the %SYSFUNC(DEQUOTE) function when processing macro parameters that may contain quotes. It uses a DATA _NULL_ step to display the value of the 'path' parameter in the SAS^© log after removing any quotes (single or double). Successive calls to the 'testit' macro demonstrate how SAS^© handles character strings, whether passed raw, with single quotes, or with double quotes. This script is useful for understanding character string manipulation in the SAS^© macro environment.

Data Analysis

Type : CREATION_INTERNE

The script does not process existing SAS data or create persistent data. It manipulates and displays a literal character string passed as a macro parameter, using only the console (log) for output.

1 Code Block

MACRO DEFINITION & DATA STEP

Explanation :
This code block defines and calls the `testit` macro. The macro takes a `path` parameter. Inside the macro, a `DATA _NULL_` step is used to write directly to the SAS log. The `%SYSFUNC(DEQUOTE(&path))` function is crucial here: it removes quotes (single or double) from the value passed to the `path` parameter before it is displayed. The three subsequent calls to `%testit` show how the `DEQUOTE` function handles different string passing syntaxes (without quotes, with single quotes, with double quotes), ensuring that the result displayed in the log is always the path without quotes.

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1	%macro testit(path=);
2	DATA _null_;
3	put "%sysfunc(dequote(&path))";
4	RUN;
5	%mend testit;
6
7	%testit(path=D:\Projects\);
8	%testit(path='D:\Projects\');
9	%testit(path="D:\Projects\");

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