small changes with new flag system.
This commit is contained in:
Vítor Santos Costa
539
pl/flags.yap
539
pl/flags.yap
@@ -44,545 +44,6 @@
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:- use_system_module( '$_yio', ['$default_expand'/1,
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:- use_system_module( '$_yio', ['$default_expand'/1,
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'$set_default_expand'/1]).
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'$set_default_expand'/1]).
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/** @pred yap_flag(? _Param_,? _Value_)
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Set or read system properties for _Param_:
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+ `argv `
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Read-only flag. It unifies with a list of atoms that gives the
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arguments to YAP after `--`.
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+ `agc_margin `
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An integer: if this amount of atoms has been created since the last
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atom-garbage collection, perform atom garbage collection at the first
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opportunity. Initial value is 10,000. May be changed. A value of 0
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(zero) disables atom garbage collection.
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+ `associate`
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Read-write flag telling a suffix for files associated to Prolog
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sources. It is `yap` by default.
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+ `arithmetic_exceptions `
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Read-write flag telling whether arithmetic exceptions generate
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Prolog exceptions. If enabled:
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~~~~
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?- X is 2/0.
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ERROR!!
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ZERO DIVISOR ERROR- X is Exp
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~~~~
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If disabled:
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~~~~
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?- X is 2/0.
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X = (+inf).
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~~~~
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It is `true` by default, but it is disabled by packages like CLP(BN) and ProbLog.
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+ `bounded` is iso
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Read-only flag telling whether integers are bounded. The value depends
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on whether YAP uses the GMP library or not.
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+ `profiling `
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If `off` (default) do not compile call counting information for
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procedures. If `on` compile predicates so that they calls and
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retries to the predicate may be counted. Profiling data can be read through the
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call_count_data/3 built-in.
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+ `char_conversion is iso`
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Writable flag telling whether a character conversion table is used when
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reading terms. The default value for this flag is `off` except in
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`sicstus` and `iso` language modes, where it is `on`.
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+ `character_escapes is iso `
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Writable flag telling whether a character escapes are enables,
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`true`, or disabled, `false`. The default value for this flag is
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`on`.
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+ `debug is iso `
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If _Value_ is unbound, tell whether debugging is `true` or
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`false`. If _Value_ is bound to `true` enable debugging, and if
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it is bound to `false` disable debugging.
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+ `debugger_print_options `
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If bound, set the argument to the `write_term/3` options the
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debugger uses to write terms. If unbound, show the current options.
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+ `dialect `
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Read-only flag that always returns `yap`.
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+ `discontiguous_warnings `
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If _Value_ is unbound, tell whether warnings for discontiguous
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predicates are `on` or
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`off`. If _Value_ is bound to `on` enable these warnings,
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and if it is bound to `off` disable them. The default for YAP is
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`off`, unless we are in `sicstus` or `iso` mode.
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+ `dollar_as_lower_case `
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If `off` (default) consider the character `$` a control character, if
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`on` consider `$` a lower case character.
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+ `double_quotes is iso `
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If _Value_ is unbound, tell whether a double quoted list of characters
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token is converted to a list of atoms, `chars`, to a list of integers,
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`codes`, or to a single atom, `atom`. If _Value_ is bound, set to
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the corresponding behavior. The default value is `codes`.
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+ `executable `
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Read-only flag. It unifies with an atom that gives the
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original program path.
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+ `fast `
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If `on` allow fast machine code, if `off` (default) disable it. Only
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available in experimental implementations.
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+ `fileerrors`
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If `on` `fileerrors` is `on`, if `off` (default)
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`fileerrors` is disabled.
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+ `float_format `
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C-library `printf()` format specification used by write/1 and
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friends to determine how floating point numbers are printed. The
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default is `%.15g`. The specified value is passed to `printf()`
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without further checking. For example, if you want less digits
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printed, `%g` will print all floats using 6 digits instead of the
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default 15.
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+ `gc`
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If `on` allow garbage collection (default), if `off` disable it.
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+ `gc_margin `
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Set or show the minimum free stack before starting garbage
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collection. The default depends on total stack size.
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+ `gc_trace `
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If `off` (default) do not show information on garbage collection
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and stack shifts, if `on` inform when a garbage collection or stack
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shift happened, if verbose give detailed information on garbage
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collection and stack shifts. Last, if `very_verbose` give detailed
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information on data-structures found during the garbage collection
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process, namely, on choice-points.
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+ `generate_debugging_info `
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If `true` (default) generate debugging information for
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procedures, including source mode. If `false` predicates no
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information is generated, although debugging is still possible, and
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source mode is disabled.
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+ `host_type `
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Return `configure` system information, including the machine-id
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for which YAP was compiled and Operating System information.
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+ `index `
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If `on` allow indexing (default), if `off` disable it, if
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`single` allow on first argument only.
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+ `index_sub_term_search_depth `
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Maximum bound on searching sub-terms for indexing, if `0` (default) no bound.
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+ `informational_messages `
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If `on` allow printing of informational messages, such as the ones
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that are printed when consulting. If `off` disable printing
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these messages. It is `on` by default except if YAP is booted with
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the `-L` flag.
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+ `integer_rounding_function is iso `
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Read-only flag telling the rounding function used for integers. Takes the value
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`toward_zero` for the current version of YAP.
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+ `language `
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Choose whether YAP is closer to C-Prolog, `cprolog`, iso-prolog,
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`iso` or SICStus Prolog, `sicstus`. The current default is
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`cprolog`. This flag affects update semantics, leashing mode,
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style checking, handling calls to undefined procedures, how directives
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are interpreted, when to use dynamic, character escapes, and how files
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are consulted.
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+ `max_arity is iso `
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Read-only flag telling the maximum arity of a functor. Takes the value
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`unbounded` for the current version of YAP.
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+ `max_integer is iso `
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Read-only flag telling the maximum integer in the
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implementation. Depends on machine and Operating System
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architecture, and on whether YAP uses the `GMP` multi-precision
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library. If bounded is false, requests for max_integer
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will fail.
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+ `max_tagged_integer `
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Read-only flag telling the maximum integer we can store as a single
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word. Depends on machine and Operating System
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architecture. It can be used to find the word size of the current machine.
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+ `min_integer is iso `
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Read-only flag telling the minimum integer in the
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implementation. Depends on machine and Operating System architecture,
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and on whether YAP uses the `GMP` multi-precision library. If
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bounded is false, requests for min_integer will fail.
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+ `min_tagged_integer `
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Read-only flag telling the minimum integer we can store as a single
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word. Depends on machine and Operating System
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architecture.
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+ `n_of_integer_keys_in_bb `
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Read or set the size of the hash table that is used for looking up the
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blackboard when the key is an integer.
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+ `occurs_check `
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Current read-only and set to `false`.
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+ `n_of_integer_keys_in_db `
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Read or set the size of the hash table that is used for looking up the
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internal data-base when the key is an integer.
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+ `open_expands_filename `
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If `true` the open/3 builtin performs filename-expansion
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before opening a file (SICStus Prolog like). If `false` it does not
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(SWI-Prolog like).
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+ `open_shared_object `
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If true, `open_shared_object/2` and friends are implemented,
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providing access to shared libraries (`.so` files) or to dynamic link
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libraries (`.DLL` files).
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+ `profiling `
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If `off` (default) do not compile profiling information for
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procedures. If `on` compile predicates so that they will output
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profiling information. Profiling data can be read through the
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profile_data/3 built-in.
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+ `prompt_alternatives_on(atom, changeable) `
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SWI-Compatible option, determines prompting for alternatives in the Prolog toplevel. Default is <tt>groundness</tt>, YAP prompts for alternatives if and only if the query contains variables. The alternative, default in SWI-Prolog is <tt>determinism</tt> which implies the system prompts for alternatives if the goal succeeded while leaving choicepoints.
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+ `qcompile(+{never, auto, large, part}, changeable)`
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SWI-Prolog flag that controls whether loaded files should be also
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compiled into qfiles. The default value is `never`.
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`never`, no qcompile file is generated unless the user calls
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qsave_file/1 and friends, or sets the qcompile option in
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load_files/2;
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`auto`, all files are qcompiled.
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`large`, files above 100KB are qcompiled.
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`part`, not supported in YAP.
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+ `redefine_warnings `
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If _Value_ is unbound, tell whether warnings for procedures defined
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in several different files are `on` or
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`off`. If _Value_ is bound to `on` enable these warnings,
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and if it is bound to `off` disable them. The default for YAP is
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`off`, unless we are in `sicstus` or `iso` mode.
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+ `shared_object_search_path `
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Name of the environment variable used by the system to search for shared
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objects.
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+ `shared_object_extension `
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Suffix associated with loadable code.
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+ `single_var_warnings `
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If _Value_ is unbound, tell whether warnings for singleton variables
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are `on` or `off`. If _Value_ is bound to `on` enable
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these warnings, and if it is bound to `off` disable them. The
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default for YAP is `off`, unless we are in `sicstus` or
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`iso` mode.
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+ `strict_iso `
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If _Value_ is unbound, tell whether strict ISO compatibility mode
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is `on` or `off`. If _Value_ is bound to `on` set
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language mode to `iso` and enable strict mode. If _Value_ is
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bound to `off` disable strict mode, and keep the current language
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mode. The default for YAP is `off`.
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Under strict ISO Prolog mode all calls to non-ISO built-ins generate an
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error. Compilation of clauses that would call non-ISO built-ins will
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also generate errors. Pre-processing for grammar rules is also
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disabled. Module expansion is still performed.
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Arguably, ISO Prolog does not provide all the functionality required
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from a modern Prolog system. Moreover, because most Prolog
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implementations do not fully implement the standard and because the
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standard itself gives the implementor latitude in a few important
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questions, such as the unification algorithm and maximum size for
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numbers there is no guarantee that programs compliant with this mode
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will work the same way in every Prolog and in every platform. We thus
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believe this mode is mostly useful when investigating how a program
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depends on a Prolog's platform specific features.
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+ `stack_dump_on_error `
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If `on` show a stack dump when YAP finds an error. The default is
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`off`.
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+ `syntax_errors`
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Control action to be taken after syntax errors while executing read/1,
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`read/2`, or `read_term/3`:
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+ `dec10`
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Report the syntax error and retry reading the term.
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+ `fail`
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Report the syntax error and fail (default).
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+ `error`
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Report the syntax error and generate an error.
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+ `quiet`
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Just fail
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+ `system_options `
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This read only flag tells which options were used to compile
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YAP. Currently it informs whether the system supports `big_numbers`,
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`coroutining`, `depth_limit`, `low_level_tracer`,
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`or-parallelism`, `rational_trees`, `readline`, `tabling`,
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`threads`, or the `wam_profiler`.
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+ `tabling_mode`
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Sets or reads the tabling mode for all tabled predicates. Please
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(see Tabling) for the list of options.
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+ `to_chars_mode `
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Define whether YAP should follow `quintus`-like
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semantics for the `atom_chars/1` or `number_chars/1` built-in,
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or whether it should follow the ISO standard (`iso` option).
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+ `toplevel_hook `
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If bound, set the argument to a goal to be executed before entering the
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top-level. If unbound show the current goal or `true` if none is
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presented. Only the first solution is considered and the goal is not
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backtracked into.
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+ `toplevel_print_options `
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If bound, set the argument to the `write_term/3` options used to write
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terms from the top-level. If unbound, show the current options.
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+ `typein_module `
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If bound, set the current working or type-in module to the argument,
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which must be an atom. If unbound, unify the argument with the current
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working module.
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+ `unix`
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Read-only Boolean flag that unifies with `true` if YAP is
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running on an Unix system. Defined if the C-compiler used to compile
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this version of YAP either defines `__unix__` or `unix`.
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+ `unknown is iso`
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Corresponds to calling the unknown/2 built-in. Possible values
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are `error`, `fail`, and `warning`.
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+ `update_semantics `
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Define whether YAP should follow `immediate` update
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semantics, as in C-Prolog (default), `logical` update semantics,
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as in Quintus Prolog, SICStus Prolog, or in the ISO standard. There is
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||||||
also an intermediate mode, `logical_assert`, where dynamic
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||||||
procedures follow logical semantics but the internal data base still
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||||||
follows immediate semantics.
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+ `user_error `
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||||||
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||||||
If the second argument is bound to a stream, set user_error to
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this stream. If the second argument is unbound, unify the argument with
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||||||
the current user_error stream.
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|
||||||
By default, the user_error stream is set to a stream
|
|
||||||
corresponding to the Unix `stderr` stream.
|
|
||||||
The next example shows how to use this flag:
|
|
||||||
|
|
||||||
~~~{.prolog}
|
|
||||||
?- open( '/dev/null', append, Error,
|
|
||||||
[alias(mauri_tripa)] ).
|
|
||||||
|
|
||||||
Error = '$stream'(3) ? ;
|
|
||||||
|
|
||||||
no
|
|
||||||
?- set_prolog_flag(user_error, mauri_tripa).
|
|
||||||
|
|
||||||
close(mauri_tripa).
|
|
||||||
|
|
||||||
yes
|
|
||||||
?-
|
|
||||||
~~~
|
|
||||||
We execute three commands. First, we open a stream in write mode and
|
|
||||||
give it an alias, in this case `mauri_tripa`. Next, we set
|
|
||||||
user_error to the stream via the alias. Note that after we did so
|
|
||||||
prompts from the system were redirected to the stream
|
|
||||||
`mauri_tripa`. Last, we close the stream. At this point, YAP
|
|
||||||
automatically redirects the user_error alias to the original
|
|
||||||
`stderr`.
|
|
||||||
|
|
||||||
+ `user_flags `
|
|
||||||
|
|
||||||
Define the behaviour of set_prolog_flag/2 if the flag is not known. Values are `silent`, `warning` and `error`. The first two create the flag on-the-fly, with `warning` printing a message. The value `error` is consistent with ISO: it raises an existence error and does not create the flag. See also `create_prolog_flag/3`. The default is`error`, and developers are encouraged to use `create_prolog_flag/3` to create flags for their library.
|
|
||||||
|
|
||||||
+ `user_input `
|
|
||||||
|
|
||||||
If the second argument is bound to a stream, set user_input to
|
|
||||||
this stream. If the second argument is unbound, unify the argument with
|
|
||||||
the current user_input stream.
|
|
||||||
By default, the user_input stream is set to a stream
|
|
||||||
corresponding to the Unix `stdin` stream.
|
|
||||||
|
|
||||||
+ `user_output `
|
|
||||||
|
|
||||||
If the second argument is bound to a stream, set user_output to
|
|
||||||
this stream. If the second argument is unbound, unify the argument with
|
|
||||||
the current user_output stream.
|
|
||||||
By default, the user_output stream is set to a stream
|
|
||||||
corresponding to the Unix `stdout` stream.
|
|
||||||
|
|
||||||
+ `verbose `
|
|
||||||
|
|
||||||
If `normal` allow printing of informational and banner messages,
|
|
||||||
such as the ones that are printed when consulting. If `silent`
|
|
||||||
disable printing these messages. It is `normal` by default except if
|
|
||||||
YAP is booted with the `-q` or `-L` flag.
|
|
||||||
|
|
||||||
+ `verbose_load `
|
|
||||||
|
|
||||||
If `true` allow printing of informational messages when
|
|
||||||
consulting files. If `false` disable printing these messages. It
|
|
||||||
is `normal` by default except if YAP is booted with the `-L`
|
|
||||||
flag.
|
|
||||||
|
|
||||||
+ `version `
|
|
||||||
|
|
||||||
Read-only flag that returns an atom with the current version of
|
|
||||||
YAP.
|
|
||||||
|
|
||||||
+ `version_data `
|
|
||||||
|
|
||||||
Read-only flag that reads a term of the form
|
|
||||||
`yap`( _Major_, _Minor_, _Patch_, _Undefined_), where
|
|
||||||
_Major_ is the major version, _Minor_ is the minor version,
|
|
||||||
and _Patch_ is the patch number.
|
|
||||||
|
|
||||||
+ `windows `
|
|
||||||
|
|
||||||
Read-only boolean flag that unifies with tr `true` if YAP is
|
|
||||||
running on an Windows machine.
|
|
||||||
|
|
||||||
+ `write_strings `
|
|
||||||
|
|
||||||
Writable flag telling whether the system should write lists of
|
|
||||||
integers that are writable character codes using the list notation. It
|
|
||||||
is `on` if enables or `off` if disabled. The default value for
|
|
||||||
this flag is `off`.
|
|
||||||
|
|
||||||
+ `max_workers `
|
|
||||||
|
|
||||||
Read-only flag telling the maximum number of parallel processes.
|
|
||||||
|
|
||||||
+ `max_threads `
|
|
||||||
|
|
||||||
Read-only flag telling the maximum number of Prolog threads that can
|
|
||||||
be created.
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
*/
|
|
||||||
/** @pred yap_flag(unknown,+ _SPEC_)
|
|
||||||
|
|
||||||
Alternatively, one can use yap_flag/2,
|
|
||||||
current_prolog_flag/2, or set_prolog_flag/2, to set this
|
|
||||||
functionality. In this case, the first argument for the built-ins should
|
|
||||||
be `unknown`, and the second argument should be either
|
|
||||||
`error`, `warning`, `fail`, or a goal.
|
|
||||||
|
|
||||||
|
|
||||||
*/
|
|
||||||
/** @pred yap_flag(tabling_mode,? _Mode_)
|
|
||||||
Sets or reads the tabling mode for all tabled predicates. The list of
|
|
||||||
_Mode_ options includes:
|
|
||||||
|
|
||||||
+ `default`
|
|
||||||
|
|
||||||
Defines that (i) all calls to tabled predicates are evaluated
|
|
||||||
using the predicate default mode, and that (ii) answers for all
|
|
||||||
completed calls are obtained by using the predicate default mode.
|
|
||||||
|
|
||||||
+ `batched`
|
|
||||||
|
|
||||||
Defines that all calls to tabled predicates are evaluated using
|
|
||||||
batched scheduling. This option ignores the default tabling mode
|
|
||||||
of each predicate.
|
|
||||||
|
|
||||||
+ `local`
|
|
||||||
|
|
||||||
Defines that all calls to tabled predicates are evaluated using
|
|
||||||
local scheduling. This option ignores the default tabling mode
|
|
||||||
of each predicate.
|
|
||||||
|
|
||||||
+ `exec_answers`
|
|
||||||
|
|
||||||
Defines that answers for all completed calls are obtained by
|
|
||||||
executing compiled WAM-like code directly from the trie data
|
|
||||||
structure. This option ignores the default tabling mode
|
|
||||||
of each predicate.
|
|
||||||
|
|
||||||
+ `load_answers`
|
|
||||||
|
|
||||||
Defines that answers for all completed calls are obtained by
|
|
||||||
loading them from the trie data structure. This option ignores
|
|
||||||
the default tabling mode of each predicate.
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
*/
|
|
||||||
yap_flag(V,Out) :-
|
yap_flag(V,Out) :-
|
||||||
'$user_defined_flag'(V,_,_,_),
|
'$user_defined_flag'(V,_,_,_),
|
||||||
(nonvar(V) ->
|
(nonvar(V) ->
|
||||||
|
|||||||
Reference in New Issue
Block a user