SWI-Prolog -- exists_source/1

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Predicate exists_source/1

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Availability:built-in

Source

[semidet]exists_source(+Source)

True if Source (a term valid for load_files/2) exists. Fails without error if this is not the case. The predicate is intended to be used with conditional compilation (see section 4.3.1.2 For example:

:- if(exists_source(library(error))).
:- use_module_library(error).
:- endif.

The implementation uses absolute_file_name/3 using file_type(prolog).