- swipl
- library
- error.pl -- Error generating support
- apply.pl -- Apply predicates on a list
- lists.pl -- List Manipulation
- debug.pl -- Print debug messages and test assertions
- broadcast.pl -- Event service
- socket.pl -- Network socket (TCP and UDP) library
- predicate_options.pl -- Access and analyse predicate options
- shlib.pl -- Utility library for loading foreign objects (DLLs, shared objects)
- option.pl -- Option list processing
- uid.pl -- User and group management on Unix systems
- unix.pl -- Unix specific operations
- syslog.pl -- Unix syslog interface
- thread_pool.pl -- Resource bounded thread management
- gensym.pl -- Generate unique symbols
- settings.pl -- Setting management
- arithmetic.pl -- Extensible arithmetic
- main.pl -- Provide entry point for scripts
- readutil.pl -- Read utilities
- ssl.pl -- Secure Socket Layer (SSL) library
- crypto.pl -- Cryptography and authentication library
- filesex.pl -- Extended operations on files
- doc_http.pl -- Documentation server
- pldoc.pl -- Process source documentation
- operators.pl -- Manage operators
- pairs.pl -- Operations on key-value lists
- prolog_source.pl -- Examine Prolog source-files
- sgml.pl -- SGML, XML and HTML parser
- quasi_quotations.pl -- Define Quasi Quotation syntax
- uri.pl -- Process URIs
- url.pl -- Analysing and constructing URL
- www_browser.pl -- Open a URL in the users browser
- prolog_colour.pl -- Prolog syntax colouring support.
- record.pl -- Access compound arguments by name
- prolog_xref.pl -- Prolog cross-referencer data collection
- occurs.pl -- Finding and counting sub-terms
- ordsets.pl -- Ordered set manipulation
- assoc.pl -- Binary associations
- ugraphs.pl -- Graph manipulation library
- memfile.pl
- xpath.pl -- Select nodes in an XML DOM
- iostream.pl -- Utilities to deal with streams
- atom.pl -- Operations on atoms
- porter_stem.pl
- solution_sequences.pl -- Modify solution sequences
- prolog_pack.pl -- A package manager for Prolog
- prolog_config.pl -- Provide configuration information
- process.pl -- Create processes and redirect I/O
- git.pl -- Run GIT commands
- ctypes.pl -- Character code classification
- time.pl -- Time and alarm library
- utf8.pl -- UTF-8 encoding/decoding on lists of character codes.
- base64.pl -- Base64 encoding and decoding
- sha.pl -- SHA secure hashes
- crypt.pl
- persistency.pl -- Provide persistent dynamic predicates
- pure_input.pl -- Pure Input from files and streams
- nb_set.pl -- Non-backtrackable sets
- xsdp_types.pl -- XML-Schema primitive types
- uuid.pl -- Universally Unique Identifier (UUID) Library
- pcre.pl -- Perl compatible regular expression matching for SWI-Prolog
- aggregate.pl -- Aggregation operators on backtrackable predicates
- rdf_write.pl -- Write RDF/XML from a list of triples
- rdf.pl -- RDF/XML parser
- sgml_write.pl -- XML/SGML writer module
- archive.pl -- Access several archive formats
- csv.pl -- Process CSV (Comma-Separated Values) data
- dialect.pl -- Support multiple Prolog dialects
- apply_macros.pl -- Goal expansion rules to avoid meta-calling
- prolog_code.pl -- Utilities for reasoning about code
- dif.pl -- The dif/2 constraint
- thread.pl -- High level thread primitives
- rdf_triple.pl -- Create triples from intermediate representation
- rdf_parser.pl
- rewrite_term.pl
- rbtrees.pl -- Red black trees
- nb_rbtrees.pl -- Non-backtrackable operations on red black trees
- pengines.pl -- Pengines: Web Logic Programming Made Easy
- yall.pl -- Lambda expressions
- sandbox.pl -- Sandboxed Prolog code
- prolog_format.pl -- Analyse format specifications
- random.pl -- Random numbers
- pengines_io.pl -- Provide Prolog I/O for HTML clients
- zlib.pl -- Zlib wrapper for SWI-Prolog
- bdb.pl -- Berkeley DB interface
- hash_stream.pl -- Maintain a hash on a stream
- md5.pl -- MD5 hashes
- pprint.pl -- Pretty Print Prolog terms
- modules.pl -- Module utility predicates
- lazy_lists.pl -- Lazy list handling
- edinburgh.pl -- Some traditional Edinburgh predicates
- prolog_clause.pl -- Get detailed source-information about a clause
- prolog_breakpoints.pl -- Manage Prolog break-points
- dicts.pl -- Dict utilities
- backcomp.pl -- Backward compatibility
- date.pl -- Process dates and times
- term_to_json.pl
- snowball.pl -- The Snowball multi-lingual stemmer library
- system.pl -- System utilities
- quintus.pl -- Quintus compatibility
- make.pl -- Reload modified source files
- edit.pl -- Editor interface
- prolog_debug.pl -- User level debugging tools
- intercept.pl -- Intercept and signal interface
- unicode.pl -- Unicode string handling
- udp_broadcast.pl -- A UDP broadcast proxy
- strings.pl -- String utilities
- charsio.pl -- I/O on Lists of Character Codes
- statistics.pl -- Get information about resource usage
- jpl.pl -- A Java interface for SWI Prolog 7.x
- heaps.pl -- heaps/priority queues
- tables.pl -- XSB interface to tables
- increval.pl -- Incremental dynamic predicate modification
- base32.pl -- Base32 encoding and decoding
- prolog_history.pl -- Per-directory persistent commandline history
- readline.pl -- GNU readline interface
- table.pl
- sort.pl
- paxos.pl -- A Replicated Data Store
- odbc.pl
- oset.pl -- Ordered set manipulation
- zip.pl -- Access resource ZIP archives
- redis.pl -- Redis client
- check.pl -- Consistency checking
- prolog_stack.pl -- Examine the Prolog stack
- threadutil.pl -- Interactive thread utilities
- prolog_autoload.pl -- Autoload all dependencies
- qsave.pl -- Save current program as a state or executable
- stomp.pl -- STOMP client.
- redis_streams.pl -- Using Redis streams
- editline.pl -- BSD libedit based command line editing
- optparse.pl -- command line parsing
- win_menu.pl -- Console window menu
- tty.pl -- Terminal operations
- streampool.pl -- Input multiplexing
- plunit.pl -- Unit Testing
- ansi_term.pl -- Print decorated text to ANSI consoles
- listing.pl -- List programs and pretty print clauses
- doc_latex.pl -- PlDoc LaTeX backend
- explain.pl -- Describe Prolog Terms
- prolog_trace.pl -- Print access to predicates
- prolog_wrap.pl -- Wrapping predicates
- wfs.pl -- Well Founded Semantics interface
- prolog_stream.pl -- A stream with Prolog callbacks
- shell.pl -- Elementary shell commands
- terms.pl -- Term manipulation
- when.pl -- Conditional coroutining
- mqi.pl
- prolog_codewalk.pl -- Prolog code walker
- help.pl -- Text based manual
- varnumbers.pl -- Utilities for numbered terms
- hashtable.pl -- Hash tables
- fastrw.pl -- Fast reading and writing of terms
- isub.pl -- isub: a string similarity measure
- files.pl
- yaml.pl -- Process YAML data
- protobufs.pl -- Google's Protocol Buffers ("protobufs")
- codesio.pl -- I/O on Lists of Character Codes
- coinduction.pl -- Co-Logic Programming
- portray_text.pl -- Portray text
- c14n2.pl -- C14n2 canonical XML documents
- prolog_metainference.pl -- Infer meta-predicate properties
- pdt_console.pl
- prolog_jiti.pl -- Just In Time Indexing (JITI) utilities
- writef.pl -- Old-style formatted write
- test_cover.pl -- Clause coverage analysis
- xmlenc.pl -- XML encryption library
- double_metaphone.pl -- Phonetic string matching
- xmldsig.pl -- XML Digital signature
- 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.