is_file()

Identifies whether a given value is a file identifier. Returns TRUE if a given value is a file identifier, NULL if given value is not a file identifier.

Syntax:

is_file(value);

where

value is any value.

Example:

decl f;
f = fopen("atest", "R");
is_file(f); // returns TRUE

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Where Used:

Measurement Expressions (Data Display equations and Schematic MeasEqns), Schematic, Layout, Simulation, GUI