- swipl
- library
- error.pl
- debug.pl -- Print debug messages and test assertions
- apply.pl -- Apply predicates on a list
- lists.pl
- broadcast.pl -- Event service
- predicate_options.pl
- shlib.pl -- Utility library for loading foreign objects (DLLs, shared objects)
- option.pl -- Option list processing
- thread_pool.pl -- Resource bounded thread management
- gensym.pl
- settings.pl -- Setting management
- arithmetic.pl -- Extensible arithmetic
- main.pl -- Provide entry point for scripts
- readutil.pl
- operators.pl -- Manage operators
- pairs.pl -- Operations on key-value lists
- prolog_source.pl -- Examine Prolog source-files
- prolog_read_source_term/4
- requires_library/2
- load_quasi_quotation_syntax/2
- read_source_term_at_location/3
- prolog_open_source/2
- prolog_close_source/1
- prolog_canonical_source/2
- file_name_on_path/2
- file_alias_path/2
- path_segments_atom/2
- directory_source_files/3
- valid_term_position/2
- quasi_quotation_syntax/2
- xref_open_source/2
- xref_close_source/2
- 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
- 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
- listing.pl -- List programs and pretty print clauses
- edit.pl -- Editor interface
- backcomp.pl -- Backward compatibility
- writef.pl -- Old-style formatted write
- when.pl -- Conditional coroutining
- statistics.pl -- Get information about resource usage
- prolog_config.pl -- Provide configuration information
- macros.pl -- Macro expansion
- terms.pl -- Term manipulation
- make.pl -- Reload modified source files
- wfs.pl -- Well Founded Semantics interface
- optparse.pl -- command line parsing
- increval.pl -- Incremental dynamic predicate modification
- tables.pl -- XSB interface to tables
- hashtable.pl -- Hash tables
- base32.pl -- Base32 encoding and decoding
- prolog_trace.pl -- Print access to predicates
- prolog_wrap.pl -- Wrapping predicates
- threadutil.pl -- Interactive thread utilities
- prolog_coverage.pl -- Coverage analysis tool
- ansi_term.pl -- Print decorated text to ANSI consoles
- strings.pl -- String utilities
- zip.pl -- Access resource ZIP archives
- codesio.pl -- I/O on Lists of Character Codes
- date.pl -- Process dates and times
- prolog_profile.pl -- Execution profiler
- quintus.pl -- Quintus compatibility
- heaps.pl -- heaps/priority queues
- streams.pl -- Manage Prolog streams
- check.pl -- Consistency checking
- prolog_history.pl -- Per-directory persistent commandline history
- prolog_stack.pl -- Examine the Prolog stack
- prolog_debug.pl -- User level debugging tools
- prolog_codewalk.pl -- Prolog code walker
- charsio.pl -- I/O on Lists of Character Codes
- coinduction.pl -- Co-Logic Programming
- sort.pl
- varnumbers.pl -- Utilities for numbered terms
- fastrw.pl -- Fast reading and writing of terms
- prolog_versions.pl -- Demand specific (Prolog) versions
- prolog_autoload.pl -- Autoload all dependencies
- shell.pl -- Elementary shell commands
- intercept.pl -- Intercept and signal interface
- rwlocks.pl -- Read/write locks
- prolog_jiti.pl -- Just In Time Indexing (JITI) utilities
- prolog_metainference.pl -- Infer meta-predicate properties
- system.pl -- System utilities
- tty.pl -- Terminal operations
- help.pl -- Text based manual
- oset.pl -- Ordered set manipulation
- explain.pl -- Describe Prolog Terms
- portray_text.pl -- Portray text
- files.pl
- win_menu.pl -- Console window menu
- qsave.pl -- Save current program as a state or executable
- library
- read_source_term_at_location(+Stream, -Term, +Options) is semidet
- Try to read a Prolog term form an arbitrary location inside a
file. Due to Prolog's dynamic syntax, e.g., due to operator
declarations that may change anywhere inside the file, this is
theoreticaly impossible. Therefore, this predicate is
fundamentally heuristic and may fail. This predicate is used
by e.g., clause_info/4 and by PceEmacs to colour the current
clause.
This predicate has two ways to find the right syntax. If the file is loaded, it can be passed the module using the module option. This deals with module files that define the used operators globally for the file. Second, there is a hook alternate_syntax/4 that can be used to temporary redefine the syntax.
The options below are processed in addition to the options of read_term/3. Note that the
line
andoffset
options are mutually exclusive.- line(+Line)
- If present, start reading at line Line.
- offset(+Characters)
- Use seek/4 to go to the indicated location. See seek/4 for limitations of seeking in text-files.
- module(+Module)
- Use syntax from the given module. Default is the current `source module'.
- operators(+List)
- List of additional operator declarations to enforce while reading the term.
- error(-Error)
- If no correct parse can be found, unify Error with a term
Offset:Message that indicates the (character) location of
the error and the related message. Adding this option
makes read_source_term_at_location/3 deterministic (
det
).
- See also
- - Use read_source_term/4 to read a file from the start.
- - alternate_syntax/4 for locally scoped operators.