- Documentation
- Reference manual
- Foreign Language Interface
- The Foreign Include File
- Argument Passing and Control
- Atoms and functors
- Analysing Terms via the Foreign Interface
- Constructing Terms
- Unifying data
- Convenient functions to generate Prolog exceptions
- BLOBS: Using atoms to store arbitrary binary data
- Exchanging GMP numbers
- Calling Prolog from C
- Discarding Data
- Foreign Code and Modules
- Prolog exceptions in foreign code
- Catching Signals (Software Interrupts)
- Miscellaneous
- Errors and warnings
- Environment Control from Foreign Code
- Querying Prolog
- Registering Foreign Predicates
- Foreign Code Hooks
- Storing foreign data
- Embedding SWI-Prolog in other applications
- The Foreign Include File
- Foreign Language Interface
- Packages
- Reference manual
11.4.15 Errors and warnings
PL_warning()
prints a standard Prolog warning message to the standard error (user_error)
stream. Please note that new code should consider using PL_raise_exception()
to raise a Prolog exception. See also section
4.11.
- int PL_warning(format, a1, ...)
- Print an error message starting with `
[WARNING:', followed by the output from format, followed by a `]' and a newline. Then start the tracer. format and the arguments are the same as for printf(2). Always returnsFALSE.