/usr/local/lib/swipl/library/prolog_breakpoints.pl
All Application Manual Name SummaryHelp

  • swipl
    • library
      • error.pl
      • debug.pl -- Print debug messages and test assertions
      • apply.pl
      • lists.pl -- List Manipulation
      • broadcast.pl -- Event service
      • 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 -- Generate unique symbols
      • settings.pl
      • 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
      • record.pl -- Access compound arguments by name
      • quasi_quotations.pl
      • pure_input.pl
      • solution_sequences.pl -- Modify solution sequences
      • ordsets.pl
      • random.pl
      • base64.pl -- Base64 encoding and decoding
      • aggregate.pl -- Aggregation operators on backtrackable predicates
      • yall.pl
      • sandbox.pl
      • apply_macros.pl -- Goal expansion rules to avoid meta-calling
      • assoc.pl -- Binary associations
      • prolog_format.pl -- Analyse format specifications
      • predicate_options.pl
      • csv.pl -- Process CSV (Comma-Separated Values) data
      • pprint.pl
      • atom.pl -- Operations on atoms
      • modules.pl
      • occurs.pl
      • prolog_xref.pl
      • prolog_colour.pl
      • lazy_lists.pl -- Lazy list handling
      • ugraphs.pl
      • url.pl
      • www_browser.pl -- Open a URL in the users browser
      • prolog_pack.pl
      • git.pl -- Run GIT commands
      • rbtrees.pl
      • dif.pl -- The dif/2 constraint
      • charsio.pl -- I/O on Lists of Character Codes
      • prolog_stack.pl -- Examine the Prolog stack
      • edinburgh.pl -- Some traditional Edinburgh predicates
      • prolog_clause.pl
      • prolog_breakpoints.pl -- Manage Prolog break-points
        • set_breakpoint/4
        • set_breakpoint/5
        • delete_breakpoint/1
        • breakpoint_property/2
        • set_breakpoint_condition/2
      • wfs.pl
      • dialect.pl -- Support multiple Prolog dialects
      • prolog_code.pl -- Utilities for reasoning about code
      • sort.pl
      • iostream.pl -- Utilities to deal with streams
      • dicts.pl -- Dict utilities
      • varnumbers.pl
      • prolog_debug.pl
      • system.pl -- System utilities
      • quintus.pl
      • hashtable.pl -- Hash tables
      • base32.pl -- Base32 encoding and decoding
      • codesio.pl -- I/O on Lists of Character Codes
      • coinduction.pl -- Co-Logic Programming
      • date.pl -- Process dates and times
      • heaps.pl -- heaps/priority queues
      • statistics.pl
      • terms.pl
      • utf8.pl
      • when.pl
      • backcomp.pl -- Backward compatibility
      • writef.pl
      • prolog_wrap.pl
      • optparse.pl
      • macros.pl
      • tables.pl
      • threadutil.pl -- Interactive thread utilities
      • check.pl -- Consistency checking
      • prolog_history.pl
      • prolog_config.pl
      • prolog_coverage.pl -- Coverage analysis tool
      • prolog_metainference.pl
      • prolog_codewalk.pl -- Prolog code walker
      • listing.pl -- List programs and pretty print clauses
      • intercept.pl -- Intercept and signal interface
      • ansi_term.pl -- Print decorated text to ANSI consoles
      • prolog_versions.pl -- Demand specific (Prolog) versions
      • thread.pl -- High level thread primitives
      • shell.pl
      • ctypes.pl
      • qsave.pl
      • zip.pl
      • prolog_autoload.pl
      • explain.pl -- Describe Prolog Terms
      • exceptions.pl -- Exception classification
      • strings.pl -- String utilities
      • prolog_trace.pl -- Print access to predicates
      • make.pl
      • streams.pl
      • fastrw.pl
      • persistency.pl -- Provide persistent dynamic predicates
      • increval.pl -- Incremental dynamic predicate modification
      • nb_set.pl
      • help.pl
      • edit.pl -- Editor interface
      • portray_text.pl
      • files.pl
      • prolog_profile.pl
      • prolog_jiti.pl
 set_breakpoint(+File, +Line, +Char, -Id) is det
 set_breakpoint(+Owner, +File, +Line, +Char, -Id) is det
Put a breakpoint at the indicated source-location. File is a current sourcefile (as reported by source_file/1). Line is the 1-based line in which Char is. Char is the position of the break.

First, '$clause_from_source'/4 uses the SWI-Prolog clause-source information to find the last clause starting before Line. '$break_pc' generates (on backtracking), a list of possible breakpoints.

Note that in addition to setting the breakpoint, the system must be in debug mode for the breakpoint to take effect. With threading enabled, there are various different ways this may be done. See debug/0, tdebug/0 and tdebug/1. Therefore, this predicate does not enable debug mode.

Arguments:
Owner- denotes the file that owns the clause. set_breakpoint/5 is used to set breakpoints in an included file in the context of the Owner main file. See source_file_property/2.