- swipl
- library
- error.pl
- debug.pl -- Print debug messages and test assertions
- apply.pl -- Apply predicates on a list
- lists.pl -- List Manipulation
- broadcast.pl -- Event service
- predicate_options.pl -- Access and analyse predicate options
- shlib.pl -- Utility library for loading foreign objects (DLLs, shared objects)
- option.pl -- Option list processing
- thread_pool.pl
- gensym.pl -- Generate unique symbols
- settings.pl -- Setting management
- arithmetic.pl -- Extensible arithmetic
- main.pl -- Provide entry point for scripts
- readutil.pl -- Read utilities
- operators.pl -- Manage operators
- pairs.pl -- Operations on key-value lists
- prolog_source.pl -- Examine Prolog source-files
- quasi_quotations.pl -- Define Quasi Quotation syntax
- 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
- iostream.pl -- Utilities to deal with streams
- atom.pl -- Operations on atoms
- prolog_pack.pl -- A package manager for Prolog
- solution_sequences.pl -- Modify solution sequences
- git.pl -- Run GIT commands
- ctypes.pl -- Character code classification
- utf8.pl -- UTF-8 encoding/decoding on lists of character codes.
- base64.pl -- Base64 encoding and decoding
- persistency.pl -- Provide persistent dynamic predicates
- pure_input.pl -- Pure Input from files and streams
- nb_set.pl -- Non-backtrackable sets
- aggregate.pl -- Aggregation operators on backtrackable predicates
- csv.pl -- Process CSV (Comma-Separated Values) data
- dialect.pl -- Support multiple Prolog dialects
- apply_macros.pl -- Goal expansion rules to avoid meta-calling
- yall.pl -- Lambda expressions
- prolog_code.pl -- Utilities for reasoning about code
- dif.pl -- The dif/2 constraint
- thread.pl -- High level thread primitives
- rbtrees.pl -- Red black trees
- nb_rbtrees.pl -- Non-backtrackable operations on red black trees
- random.pl -- Random numbers
- sandbox.pl -- Sandboxed Prolog code
- prolog_format.pl -- Analyse format specifications
- 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
- macros.pl -- Macro expansion
- terms.pl -- Term manipulation
- statistics.pl -- Get information about resource usage
- backcomp.pl -- Backward compatibility
- charsio.pl -- I/O on Lists of Character Codes
- hashtable.pl -- Hash tables
- portray_text.pl -- Portray text
- date.pl -- Process dates and times
- writef.pl -- Old-style formatted write
- prolog_codewalk.pl -- Prolog code walker
- listing.pl -- List programs and pretty print clauses
- prolog_metainference.pl -- Infer meta-predicate properties
- prolog_profile.pl -- Execution profiler
- prolog_coverage.pl -- Coverage analysis tool
- prolog_autoload.pl -- Autoload all dependencies
- check.pl -- Consistency checking
- varnumbers.pl -- Utilities for numbered terms
- system.pl -- System utilities
- quintus.pl -- Quintus compatibility
- shell.pl -- Elementary shell commands
- rwlocks.pl -- Read/write locks
- oset.pl -- Ordered set manipulation
- prolog_stack.pl -- Examine the Prolog stack
- prolog_debug.pl -- User level debugging tools
- optparse.pl -- command line parsing
- threadutil.pl -- Interactive thread utilities
- prolog_history.pl -- Per-directory persistent commandline history
- prolog_config.pl -- Provide configuration information
- make.pl -- Reload modified source files
- ansi_term.pl -- Print decorated text to ANSI consoles
- prolog_versions.pl -- Demand specific (Prolog) versions
- base32.pl -- Base32 encoding and decoding
- strings.pl -- String utilities
- edit.pl -- Editor interface
- heaps.pl -- heaps/priority queues
- win_menu.pl -- Console window menu
- tty.pl -- Terminal operations
- prolog_wrap.pl -- Wrapping predicates
- sort.pl
- wfs.pl -- Well Founded Semantics interface
- zip.pl -- Access resource ZIP archives
- coinduction.pl -- Co-Logic Programming
- streams.pl -- Manage Prolog streams
- help.pl -- Text based manual
- codesio.pl -- I/O on Lists of Character Codes
- when.pl -- Conditional coroutining
- prolog_trace.pl -- Print access to predicates
- exceptions.pl -- Exception classification
- increval.pl -- Incremental dynamic predicate modification
- tables.pl -- XSB interface to tables
- fastrw.pl -- Fast reading and writing of terms
- intercept.pl -- Intercept and signal interface
- qsave.pl -- Save current program as a state or executable
- files.pl
- explain.pl -- Describe Prolog Terms
- prolog_jiti.pl -- Just In Time Indexing (JITI) utilities
- library
- help is det
- help(+What) is det
- Show help for What. What is a term that describes the
topics(s)
to give help for. Notations for What are:- Atom
- This ambiguous form is most commonly used and shows all
matching documents. For example:
?- help(append).
- Name / Arity
- Give help on predicates with matching Name/Arity. Arity may be unbound.
- Name // Arity
- Give help on the matching DCG rule (non-terminal)
- Module:Name
- Give help on predicates with Name in Module and any arity. Used for loaded code only.
- Module:Name/Arity
- Give help on predicates with Name in Module and Arity. Used for loaded code only.
- f(Name/Arity)
- Give help on the matching Prolog arithmetic functions.
- c(Name)
- Give help on the matching C interface function
- section(Label)
- Show the section from the manual with matching Label.
help/1 shows documentation from the manual as well as from loaded user code if the code is documented using PlDoc. To show only the documentatoion of the loaded predicate we may prefix predicate indicator with the module in which it is defined.
If an exact match fails this predicates attempts fuzzy matching and, when successful, display the results headed by a warning that the matches are based on fuzzy matching.
If possible, the results are sent through a pager such as the
less
program. This behaviour is controlled by the Prolog flaghelp_pager
. See section level documentation.- See also
- - apropos/1 for searching the manual names and summaries.