- swipl-7.5.1
- library
- doc_http.pl -- Documentation server
- pldoc.pl -- Process source documentation
- lists.pl -- List Manipulation
- error.pl -- Error generating support
- pairs.pl -- Operations on key-value lists
- apply.pl -- Apply predicates on a list
- memfile.pl
- shlib.pl -- Utility library for loading foreign objects (DLLs, shared objects)
- operators.pl -- Manage operators
- debug.pl -- Print debug messages and test assertions
- option.pl -- Option list processing
- prolog_source.pl -- Examine Prolog source-files
- socket.pl -- Network socket (TCP and UDP) library
- thread_pool.pl -- Resource bounded thread management
- rbtrees.pl -- Red black trees
- gensym.pl -- Generate unique symbols
- readutil.pl -- Read utilities
- url.pl -- Analysing and constructing URL
- utf8.pl -- UTF-8 encoding/decoding on lists of character codes.
- uri.pl -- Process URIs
- settings.pl -- Setting management
- broadcast.pl -- Event service
- arithmetic.pl -- Extensible arithmetic
- sgml.pl -- SGML, XML and HTML parser
- iostream.pl -- Utilities to deal with streams
- dialect.pl -- Support multiple Prolog dialects
- quasi_quotations.pl -- Define Quasi Quotation syntax
- pure_input.pl -- Pure Input from files and streams
- time.pl -- Time and alarm library
- base64.pl -- Base64 encoding and decoding
- aggregate.pl -- Aggregation operators on backtrackable predicates
- ordsets.pl -- Ordered set manipulation
- oset.pl -- Ordered set manipulation
- www_browser.pl -- Open a URL in the users browser
- process.pl -- Create processes and redirect I/O
- prolog_colour.pl -- Prolog syntax colouring support.
- prolog_xref.pl -- Prolog cross-referencer data collection
- predicate_options.pl -- Access and analyse predicate options
- prolog_clause.pl -- Get detailed source-information about a clause
- occurs.pl -- Finding and counting sub-terms
- listing.pl -- List programs and pretty print clauses
- record.pl -- Access compound arguments by name
- assoc.pl -- Binary associations
- ugraphs.pl -- Graph manipulation library
- filesex.pl -- Extended operations on files
- xpath.pl -- Select nodes in an XML DOM
- prolog_pack.pl -- A package manager for Prolog
- archive.pl -- Access several archive formats
- rdf.pl
- rdf_parser.pl
- rewrite.pl
- quintus.pl -- Quintus compatibility
- rdf_triple.pl -- Create triples from intermediate representation
- sgml_write.pl -- XML/SGML writer module
- xsdp_types.pl -- XML-Schema primitive types
- thread.pl -- High level thread primitives
- git.pl -- Run GIT commands
- ctypes.pl -- Character code classification
- sha.pl -- SHA secure hashes
- crypt.pl
- persistency.pl -- Provide persistent dynamic predicates
- tty.pl -- Terminal operations
- terms.pl -- Term manipulation
- snowball.pl -- The Snowball multi-lingual stemmer library
- sandbox.pl -- Sandboxed Prolog code
- prolog_format.pl -- Analyse format specifications
- when.pl -- Conditional coroutining
- apply_macros.pl -- Goal expansion rules to avoid meta-calling
- double_metaphone.pl -- Phonetic string matching
- porter_stem.pl
- nb_set.pl -- Non-backtrackable sets
- solution_sequences.pl -- Modify solution sequences
- uuid.pl -- Universally Unique Identifier (UUID) Library
- system.pl -- System utilities
- edinburgh.pl -- Some traditional Edinburgh predicates
- helpidx.pl
- explain.pl -- Describe Prolog Terms
- edit.pl -- Editor interface
- make.pl -- Reload modified source files
- check.pl -- Consistency checking
- prolog_codewalk.pl -- Prolog code walker
- prolog_metainference.pl -- Infer meta-predicate properties
- prolog_breakpoints.pl -- Manage Prolog break-points
- threadutil.pl -- Interactive thread utilities
- statistics.pl -- Get information about resource usage
- help.pl
- backcomp.pl -- Backward compatibility
- rdf_write.pl -- Write RDF/XML from a list of triples
- date.pl -- Process dates and times
- zlib.pl -- Zlib wrapper for SWI-Prolog
- rdf_ntriples.pl -- RDF N-triples parser (obsolete)
- csv.pl -- Process CSV (Comma-Separated Values) data
- dif.pl -- The dif/2 constraint
- ssl.pl -- Secure Socket Layer (SSL) library
- crypto.pl -- Cryptography and authentication library
- ansi_term.pl -- Print decorated text to ANSI consoles
- prolog_stack.pl -- Examine the Prolog stack
- pengines.pl -- Pengines: Web Logic Programming Made Easy
- charsio.pl -- I/O on Lists of Character Codes
- modules.pl -- Module utility predicates
- term_to_json.pl
- editline.pl -- BSD libedit based command line editing
- console_input.pl
- prolog_history.pl -- Per-directory persistent commandline history
- base32.pl -- Base32 encoding and decoding
- table.pl
- xmlenc.pl -- XML encryption library
- bdb.pl -- Berkeley DB interface
- chr.pl
- sort.pl
- doc_files.pl -- Create stand-alone documentation files
- odbc.pl
- unicode.pl -- Unicode string handling
- writef.pl -- Old-style formatted write
- udp_broadcast.pl -- A UDP Broadcast Bridge
- plunit.pl -- Unit Testing
- readline.pl -- GNU readline interface
- cgi.pl -- Read CGI parameters
- uid.pl -- User and group management on Unix systems
- protobufs.pl -- Google's Protocol Buffers
- yall.pl -- Lambda expressions
- optparse.pl -- command line parsing
- tabling.pl -- Tabled execution (SLG WAM)
- random.pl -- Random numbers
- streampool.pl
- pengines_io.pl -- Provide Prolog I/O for HTML clients
- prolog_stream.pl -- A stream with Prolog callbacks
- unix.pl -- Unix specific operations
- dicts.pl -- Dict utilities
- xmldsig.pl -- XML Digital signature
- c14n2.pl -- C14n2 canonical XML documents
- pdt_console.pl
- isub.pl -- isub: a string similarity measure
- shell.pl -- Elementary shell commands
- doc_latex.pl -- PlDoc LaTeX backend
- qsave.pl -- Save current program as a state or executable
- prolog_autoload.pl -- Autoload all dependencies
- pwp.pl -- Prolog Well-formed Pages
- md5.pl -- MD5 hashes
- files.pl
- syslog.pl -- Unix syslog interface
- test_cover.pl -- Clause cover analysis
- main.pl -- Provide entry point for scripts
- varnumbers.pl -- Utilities for numbered terms
- win_menu.pl -- Console window menu
- hash_stream.pl -- Maintain a hash on a stream
- rlimit.pl
- library
- first_solution(-X, :Goals, +Options) is semidet
- Try alternative solvers concurrently, returning the first
answer. In a typical scenario, solving any of the goals in Goals
is satisfactory for the application to continue. As soon as one
of the tried alternatives is successful, all the others are
killed and first_solution/3 succeeds.
For example, if it is unclear whether it is better to search a graph breadth-first or depth-first we can use:
search_graph(Grap, Path) :- first_solution(Path, [ breadth_first(Graph, Path), depth_first(Graph, Path) ], []).
Options include thread stack-sizes passed to thread_create, as well as the options
on_fail
andon_error
that specify what to do if a solver fails or triggers an error. By default execution of all solvers is terminated and the result is returned. Sometimes one may wish to continue. One such scenario is if one of the solvers may run out of resources or one of the solvers is known to be incomplete.- on_fail(Action)
- If
stop
(default), terminate all threads and stop with the failure. Ifcontinue
, keep waiting. - on_error(Action)
- As above, re-throwing the error if an error appears.
- bug
- - first_solution/3 cannot deal with non-determinism. There is no obvious way to fit non-determinism into it. If multiple solutions are needed wrap the solvers in findall/3.