====== application core ====== Core functionality available in all applications. ===== Objects ===== ** ''[[.:core:Core_Object |Core::Object]]'':\\ This is the common base class of all `big' objects in polymake. It does not have any properties, but provides several useful methods for scripting and interactive use. ** ''[[.:core:Core_RuleChain |Core::RuleChain]]'':\\ A rule chain to compute properties of a `big' object. It can be obtained by calling the method ''[[.:core:Core_Object#get_schedule |get_schedule]]''. ===== Functions ===== ==== Basic ==== These functions are part of the core user interface. They are available in both scripting and interactive modes. ---- {{anchor:application:}} ? **''application([[.:common#String |String]] name)''** :: Called in void context sets the current application to the one given by //name// loading its rules if necessary. Called in non-void context loads the application if necessary and returns the ''Application'' object representing it, but does not make it the current application. Finally, if called without arguments, just returns the current ''Application'' object, which is also always available in the variable ''$application''. Type ''print $application->name;'' to see its name. To obtain the introductory help topic on an application, type ''help "APPLICATION_NAME";'' ? Parameters: :: ''[[.:common#String |String]]'' ''name'' ? Example: :: To set the graph application as the current one, type this: :: > application "graph"; ---- {{anchor:disable_rules:}} ? **''disable_rules([[.:common#String |String]] pattern)''** :: Temporarily disable production rules matching given pattern. Rules are re-enabled after the complete execution of the current script or input expression in interactive mode. This ban applies to all production rules defined in the current application. If you need more fine-granular control on object type level or even for individual objects, please use user methods of the same name: ''$obj->type->disable_rules(...)'' ''$obj->disable_rules(...)'' ? Parameters: :: ''[[.:common#String |String]]'' ''pattern'': either a label (see ''[[.:core#prefer |prefer]]'') or a rule header. The rule header must exactly match the definition in the rulefile, up to white spaces around property names. If the given pattern matches headers of several rules, or the given label is associated with several rules, they all will be disabled regardless their precoditions, weights, or other attributes. ---- {{anchor:include:}} ? **''include([[.:common#String |String]] rulefile)''** :: Read additional rule files, interpret them in the context of the current application. The rule files may reside in the application's standard subdirectory ''rules'' or in any of the known extensions. ? Parameters: :: ''[[.:common#String |String]]'' ''rulefile'': one or more filenames. ---- {{anchor:load:}} ? **''load([[.:common#String |String]] filename)''** :: Read the object data file created earlier by ''[[.:core#save |save]]'' and return the object. If the data file is in old plain ASCII format and does not contain a type declaration, the default type of the current application is assumed. ? Parameters: :: ''[[.:common#String |String]]'' ''filename'' ? Returns: :''[[.:core:Core_Object |Core::Object]]'' ---- {{anchor:load_data:}} ? **''load_data([[.:common#String |String]] filename)''** :: Read the data file created earlier by ''[[.:core#save_data |save_data]]'' and return the data object stored there. ? Parameters: :: ''[[.:common#String |String]]'' ''filename'' ? Returns: :''Any'' ---- {{anchor:prefer:}} ? **''prefer([[.:common#String |String]] label_expression)''** :: Make the production rules, user functions, or methods (further called //items//) matching the given //label_expression// be preferred over competing rules (functions, methods). The new preference list is also saved in your personal file ''~/.polymake/prefer.pl'' It remains active in all forthcoming sessions until you revoke it with another //prefer// or ''[[.:core#reset_preference |reset_preference]]'' command. For the sake of symmetry you can call this function by its alias name //set_preference//. ? Parameters: :: ''[[.:common#String |String]]'' ''label_expression'': may have one of the following forms: "top_label" or "top_label.sublevels" selects all items whose labels start with the given path, e.g. "javaview" or "cdd.convex_hull". "*.sublevels top_label_1, top_label_2 ... " selects all items with matching labels and establishes a ranking between them. For example, "*.convex_hull cdd,lrs" makes rules labeled with cdd.convex_hull and lrs.convex_hull preferred over all other convex hull rules, with cdd rules having the topmost rank. ---- {{anchor:prefer_now:}} ? **''prefer_now([[.:common#String |String]] label_expression)''** :: The same as ''[[.:core#prefer |prefer]]'', but does not store the changes persistently. The lifespan of the new preference order lasts up to the end of the current user cycle (that is, end of user script or interpretation of the current input line in interactive mode). ? Parameters: :: ''[[.:common#String |String]]'' ''label_expression'' ---- {{anchor:reset_custom:}} ? **''reset_custom(Any variable)''** :: Reset the custom variable, array, hash, or hash element to the default value(s) as defined in the rule base and store it perpetually in your personal settings file ''~/.polymake/customize.pl'' ? Parameters: :: ''Any'' ''variable'': following expressions are allowed: ''$var;'' ''@array;'' ''%hash;'' ''$hash{key};'' ---- {{anchor:reset_preference:}} ? **''reset_preference([[.:common#String |String]] label_expression)''** :: Reset the matching preference lists to the default state. If there are matching preference lists declared in the rule files, they come back into effect; otherwise the preferences are neutralized, i.e. all competing items (rules/methods/etc.) get equal ranks. This change is permanent, the former settings are wiped out from your preference file ''~/.polymake/prefer.pl'' ? Parameters: :: ''[[.:common#String |String]]'' ''label_expression'': "label" or "label.sublevels" or "*.sublevels" or "*" or "all" Two last forms match all preference lists visible from the current application. ---- {{anchor:save:}} ? **''save([[.:core:Core_Object |Core::Object]] object, [[.:common#String |String]] filename)''** :: Store the given //object// in a data file. If //filename// is specified, create the file with this name (or overwrite an existing one) and store the object there. The filename may have the suffix ".gz" in which case the contents are compressed with gzip. If //filename// is omitted, write the object back to the file it was loaded from. If the object is not yet associated with a file (e.g. it was created with a ''new'' constructor) a new file is created, with the name consisting of the object name and the application-specific suffix. If the object name is empty, you will be asked for it. In non-interactive mode an artificial name of the form ''ObjectType_NNN'' will be generated, where ''NNN'' is an ordinal number. The save operation is only performed if the boolean attribute ''object->changed'' has the true value. ? Parameters: :: ''[[.:core:Core_Object |Core::Object]]'' ''object'' :: ''[[.:common#String |String]]'' ''filename'' ---- {{anchor:save_data:}} ? **''save_data(Any data, [[.:common#String |String]] filename, [[.:common#String |String]] description)''** :: Create an XML data file and store the given data object there, together with an optional description. Only objects of complex types declared as ''property_type'' can be stored this way. The filename may have the suffix ".gz" in which case the contents are compressed with gzip. ? Parameters: :: ''Any'' ''data'': object :: ''[[.:common#String |String]]'' ''filename'' :: ''[[.:common#String |String]]'' ''description'' ---- {{anchor:save_schema:}} ? **''save_schema(Any object ..., [[.:common#String |String]] filename)''** :: Generate a Relax-NG schema describing one or more `big' or `small' object types in the form as they would appear when saved with commands ''[[.:core#save |save]]'' resp. ''[[.:core#save_data |save_data]]''. ? Parameters: :: ''Any'' ''object ...'': an object whose type should be described, may be specified as a type expression as well. Multiple objects or type expressions may be passed as a list. Mixing `big' and `small' object types is not allowed. :: ''[[.:common#String |String]]'' ''filename'': a suffix .rng is appended automatically if no suffix is given ? Example: :: create a schema for a Polytope and save it in the file poly_rat.rng :: > save_schema(typeof Polytope, "poly_rat"); :: the same, specifying a type via a representative object :: > $c=cube(3); > save_schema($c, "poly_rat"); ? Example: :: create a schema for graphs and save it in the file graphs.rng :: > save_schema(typeof props::Graph, typeof props::Graph, "graph"); ---- {{anchor:script:}} ? **''script([[.:common#String |String]] filename, Any Arguments)''** :: Run the polymake script, passing the arguments in ''@ARGV''. The scripts specified without path are first looked for in the current application's ''scripts'' subdirectory, then in the user's script directories (custom array ''@lookup_scripts''), and finally in the top-level ''scripts'' subdirectory. ? Parameters: :: ''[[.:common#String |String]]'' ''filename'': script code :: ''Any'' ''Arguments'': arbitrary many arguments passed to the script ---- {{anchor:set_custom:}} ? **''set_custom(Any assignment)''** :: Set the custom variable, array, hash, or hash element to a new value and store it perpetually in your personal settings file ''~/.polymake/customize.pl'' ? Parameters: :: ''Any'' ''assignment'': following expressions are allowed: ''$var=value;'' ''@array=(values);'' ''%hash=( key => value, ... );'' ''$hash{key}=value;'' ---- ==== Interactive ==== These functions are available in the interactive shell only. ---- {{anchor:apropos:}} ? **''apropos([[.:common#String |String]] pattern)''** :: List all help topics matching the given pattern. ? Parameters: :: ''[[.:common#String |String]]'' ''pattern'': (part of) an item name to be looked for, may contain regular expression elements. ? Example: :: To get all help topics that include the word "simplicial", type this: :: > apropos("simplicial"); /objects/Visual::SimplicialComplexLattice /objects/Visual::SimplicialComplex /objects/GeometricSimplicialComplex /objects/SimplicialComplex /functions/Producing a new simplicial complex from others/simplicial_product :: In order to view a help entry, you can use the help() funtion. :: > help("/functions/Producing a new simplicial complex from others/simplicial_product"); ---- {{anchor:exit:}} ? **''exit''** :: use this command only if you want to restart polymake. ---- {{anchor:export_configured:}} ? **''export_configured([[.:common#String |String]] filename)''** :: Saves all custom variables having non-defalt values in a file. This includes all results of automatic or manual rule configuration. The obtained file can be edited manually, if needed, and used as a global configuration source (see also [[:howto/configure|How to configure polymake for a group of users]]). ? Parameters: :: ''[[.:common#String |String]]'' ''filename'': where to store the settings ? Options: : :: ''[[.:common#Bool |Bool]]'' ''merge_with_global'': include the settings inherited from *your* global configuration in the resulting file :: ''[[.:common#Bool |Bool]]'' ''only_configured'': do not export the status of unconfigured or only partially configured rulefiles :: ''[[.:common#String |String]]'' ''suppress'': regular expression matching fully qualified names of custom variables that should not be exported ---- {{anchor:extend_application:}} ? **''extend_application([[.:common#String |String]] extension, [[.:common#String |String]] app_name)''** :: Create a directory tree for rules, scripts, clients, etc. in the given //extension// pertaining to the given application. ? Parameters: :: ''[[.:common#String |String]]'' ''extension'': URI or top-level directory of a registered extension. :: ''[[.:common#String |String]]'' ''app_name'': name of the application to be extended; by default, the current application is assumed. ---- {{anchor:found_application:}} ? **''found_application([[.:common#String |String]] extension, [[.:common#String |String]] app_name)''** :: Create a directory tree for a new application, rooted at the given extension. The new application is neither loaded at this moment (just because it's quite empty at its birth), nor it is inserted in the ''@start_applications'' list. Both must be done manually at the appropriate time. A new core application can be created by entering the string "core" instead of the //extension// argument. This action is only allowed in developer's mode, i.e. when polymake is invoked from the git copy of the source tree. ? Parameters: :: ''[[.:common#String |String]]'' ''extension'': URI or top-level directory of a registered extension, or special string ''"core"''. :: ''[[.:common#String |String]]'' ''app_name'': name of the new application ---- {{anchor:found_extension:}} ? **''found_extension([[.:common#String |String]] path)''** :: Found a new extension at the given //path//. The specified directory may be absent, then it will be created; if it already exists, it should be empty or at least not contain any files and subdirectories with names having special meaning for polymake, like polymake.ext or apps. A new bundled extension can be created by entering a name of the form ''"bundled:NAME"'' instead of the //path// argument. This action is only allowed in developer's mode, i.e. when polymake is invoked from the git copy of the source tree. Please note that this command only creates an empty skeleton of top-level directories. In order to be able to populate the extension with new rules, scripts, clients, etc. you must execute the command ''[[.:core#extend_application |extend_application]]'' for every application you want to to extend. ? Parameters: :: ''[[.:common#String |String]]'' ''path'': top-level directory of the extension, or ''"bundled:NAME"'' for a bundled extension. ---- {{anchor:help:}} ? **''help([[.:common#String |String]] item)''** :: Display the help information or comments associated with a given item. If a single word without path separators ''/'' is given, it is looked for in the entire help hierarchy. If there are more than 5 matches, the corresponding help commands with full paths are generated and placed into the shell history buffer, so you can choose the themes of interest using the standard history navigation (arrow up/down keys). You may use TAB completion to navigate thru the category tree. Start with '/' to see the description of the current application. Descend via 'functions', 'objects', 'types', or 'preferences' to the topics of interest. If you stop in an intermediate category level, both the comment specific to this category and the list of subtopics will be displayed. ? Parameters: :: ''[[.:common#String |String]]'' ''item'': "word" | "category/subcategory/.../item" ---- {{anchor:history:}} ? **''history''** :: Let you choose and edit the commands typed earlier in the interactive shell. The complete history list is written in a temporary file, which is opened with a text editor. Until you store your favorite editor in the custom variable ''$history_editor'', the values of environment variables ''VISUAL'' and ''EDITOR'' are consulted. ---- {{anchor:import_extension:}} ? **''import_extension([[.:common#String |String]] path, [[.:common#List |List]] options)''** :: Load the extension installed in the given directory. The //path// is also included in the custom list ''@extensions'' for future sessions. If the extension requires some third-party libraries, which can't automatically be found by its configuration script, you can pass options to it as trailing arguments of this command. Usually, the error message displayed after the failed attempt to configure the extension will tell you which options you should specify. To obtain the complete list of configuration options supported by the extension, you can pass a single option ''"--help"'', examine its script configure.pl, or just make use of the TAB completion when typing this command. ? Parameters: :: ''[[.:common#String |String]]'' ''path'': top-level directory of the extension. :: ''[[.:common#List |List]]'' ''options'': options passed to the extension script configure.pl ---- {{anchor:load_commands:}} ? **''load_commands([[.:common#String |String]] filename)''** :: Read the lines from the given file, filter out comments and empty lines, append them to the history list of the interactive shell, and enter the replay mode (see ''[[.:core#replay_history |replay_history]]'') starting at the first inserted line. ? Parameters: :: ''[[.:common#String |String]]'' ''filename'' ---- {{anchor:obliterate_extension:}} ? **''obliterate_extension([[.:common#String |String]] path)''** :: Removes all references to the specified extension from your settings, so that the //following// polymake session won't load anything from it. Beware that in the //current// session all the rules and functions defined in the extension remain active! Therefore it's strongly recommended to quit the current session right after executing this command. The files comprising the extension itself are not deleted, however, so that you can re-import the extension later once you need it again. ? Parameters: :: ''[[.:common#String |String]]'' ''path'': URI or top-level directory of the extension. ---- {{anchor:reconfigure:}} ? **''reconfigure([[.:common#String |String]] rulename)''** :: Repeats the auto-configuration routines stored in the given rulefile, possibly asking for program paths, options, etc. If the configuration succeeds, and the rulefile hasn't been configured until now, it will be loaded, as well as all other known rulefiles depending on it. ? Parameters: :: ''[[.:common#String |String]]'' ''rulename'': name of the rulefile with optional prefix and suffix: "[APPNAME::]rulefile[@URI]". APPNAME should be specified when the rulefile does not belong to the current application; URI specifies an extension the rulefile comes from. ---- {{anchor:reconfigure_extension:}} ? **''reconfigure_extension([[.:common#String |String]] path, [[.:common#List |List]] options)''** :: Re-run the configuration script of the extension, passing some options to it. The extension must already have been imported; if not, please use the command ''[[.:core#import_extension |import_extension]]'', which supports passing configuration options too. ? Parameters: :: ''[[.:common#String |String]]'' ''path'': URI or top-level directory of the extension. :: ''[[.:common#List |List]]'' ''options'': options passed to the extension script configure.pl ---- {{anchor:replay_history:}} ? **''replay_history''** :: Bring the interactive shell in the replay mode. In this mode you can revisit, edit and execute the commands stored in the history. Simply press RETURN if you want to execute the command as is; alternatively you can edit it or jump over it using the usual history navigation keystrokes. The replay mode is switched off when the last history line has been executed or navigated over. You can leave it prematurely by entering Control-C as well. The replay mode is visually signaled by the history line number in square brackets displayed in the shell prompt. ---- {{anchor:save_history:}} ? **''save_history([[.:common#String |String]] filename)''** :: Saves the commands entered in the current and recent sessions in the file. Polymake does it automatically at the end of each interactive session; this command is provided for the case that you might want to store the commands in an alternative file and/or don't want to exit the session. Commands can be loaded using ''[[.:core#load_commands |load_commands]]''. ? Parameters: :: ''[[.:common#String |String]]'' ''filename'': defaults to ~/.polymake/history ---- {{anchor:show_credits:}} ? **''show_credits([[.:common#Bool |Bool]] brief)''** :: Prints the short descriptions of third-party software packages available from within polymake, including the copyright holders and project site URLs. Please note that here you will see only packages for which the polymake interface has been successfully configured; try ''[[.:core#show_unconfigured |show_unconfigured]]'' command to see what's you currently missing. ? Parameters: :: ''[[.:common#Bool |Bool]]'' ''brief'': list the product names only, no descriptive text ---- {{anchor:show_extensions:}} ? **''show_extensions''** :: Prints the list of active extensions including their URIs and credit notes. ---- {{anchor:show_preferences:}} ? **''show_preferences''** :: Prints the currently active preference lists. Please be aware that the output only reflects the persistent preferences; temporary changes made by ''[[.:core#prefer_now |prefer_now]]'' are not displayed even if they might be in effect when this command is executed. ---- {{anchor:show_unconfigured:}} ? **''show_unconfigured''** :: Prints the names of all rulefiles visible from the current application, which could not be loaded because of configuration failures (in most cases, due to some lacking external software). You may use the command ''[[.:core#reconfigure |reconfigure]]'' to load some of them if you have installed the required software and/or cleared out other configuration troubles. ---- {{anchor:unconfigure:}} ? **''unconfigure([[.:common#String |String]] rulename)''** :: Forgets the configuration made for the given rulefile and disables it for the //following// polymake sessions. ? Parameters: :: ''[[.:common#String |String]]'' ''rulename'': name of the rulefile with optional prefix and suffix: "[APPNAME::]rulefile[@URI]". APPNAME should be specified when the rulefile does not belong to the current application; URI specifies an extension the rulefile comes from. ----