- 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
- thread_pool.pl
- gensym.pl
- settings.pl
- arithmetic.pl
- 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
- 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
- check.pl -- Consistency checking
- ansi_term.pl -- Print decorated text to ANSI consoles
- backcomp.pl -- Backward compatibility
- writef.pl -- Old-style formatted write
- charsio.pl -- I/O on Lists of Character Codes
- sort.pl
- base32.pl -- Base32 encoding and decoding
- tables.pl -- XSB interface to tables
- statistics.pl -- Get information about resource usage
- varnumbers.pl -- Utilities for numbered terms
- prolog_jiti.pl -- Just In Time Indexing (JITI) utilities
- intercept.pl -- Intercept and signal interface
- terms.pl -- Term manipulation
- quintus.pl -- Quintus compatibility
- codesio.pl -- I/O on Lists of Character Codes
- prolog_debug.pl -- User level debugging tools
- listing.pl -- List programs and pretty print clauses
- make.pl -- Reload modified source files
- increval.pl -- Incremental dynamic predicate modification
- strings.pl -- String utilities
- date.pl -- Process dates and times
- help.pl -- Text based manual
- prolog_wrap.pl -- Wrapping predicates
- rwlocks.pl -- Read/write locks
- shell.pl -- Elementary shell commands
- explain.pl -- Describe Prolog Terms
- threadutil.pl -- Interactive thread utilities
- prolog_versions.pl -- Demand specific (Prolog) versions
- wfs.pl -- Well Founded Semantics interface
- optparse.pl -- command line parsing
- prolog_profile.pl -- Execution profiler
- qsave.pl -- Save current program as a state or executable
- zip.pl -- Access resource ZIP archives
- heaps.pl -- heaps/priority queues
- prolog_history.pl -- Per-directory persistent commandline history
- when.pl -- Conditional coroutining
- prolog_trace.pl -- Print access to predicates
- edit.pl -- Editor interface
- prolog_stack.pl -- Examine the Prolog stack
- prolog_codewalk.pl -- Prolog code walker
- prolog_metainference.pl -- Infer meta-predicate properties
- prolog_coverage.pl -- Coverage analysis tool
- macros.pl -- Macro expansion
- exceptions.pl -- Exception classification
- oset.pl -- Ordered set manipulation
- hashtable.pl -- Hash tables
- coinduction.pl -- Co-Logic Programming
- system.pl -- System utilities
- prolog_autoload.pl -- Autoload all dependencies
- prolog_config.pl -- Provide configuration information
- portray_text.pl -- Portray text
- win_menu.pl -- Console window menu
- tty.pl -- Terminal operations
- fastrw.pl -- Fast reading and writing of terms
- files.pl
- streams.pl -- Manage Prolog streams
- 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.