@is_exec(value)

the predicate returns true if the argument represents an exec, that is, the instance of a compound action (e.g., the result of a process call or an object instantiation).

The predicate returns true even if the compound action has finished its computation. However, the exec itself used in a boolean condition evaluates to true if the compound action is still running and false elsewhere.

See also Predicates @!=    @&&    @||    @<=    @<    @==    @>=    @>    @approx    @arch_darwin    @arch_linux    @arch_windows    @between    @empty    @find    @is_bool    @is_defined    @is_exec    @is_fct    @is_float    @is_function    @is_int    @is_integer_indexed    @is_list    @is_map    @is_nim    @is_numeric    @is_obj    @is_obj_xxx    @is_prefix    @is_string    @is_subsequence    @is_suffix    @is_symbol    @is_undef    @is_vector    @member    @occurs