Programming functions

These are the programming functions. See each function's help topic in the TERR Language Reference for more information.


Function name	Title description
`...elt`	Manipulate Ellipsis Arguments
`...length`	Manipulate Ellipsis Arguments
`...names`	Manipulate Ellipsis Arguments
`.doTrace`	Trace Calls to Functions
`.GlobalEnv`	Environment Access
`.handleSimpleError`	Condition Handling and Recovery
`.getNamespace`	Get Namespace Environment Information
`.Last.value`	Value of Last Evaluated Expression
`.makeMessage`	Diagnostic Messages
`.packageStartupMessage`	Diagnostic Messages
`.signalSimpleWarning`	Condition Handling and Recovery
`(`	The Structure of Expressions
`[.terms`	Modify Terms Objects
`{`	The Structure of Expressions
`\|\|`	Control Flow
`addTaskCallback`	Manage Top-Level Task Callbacks
`all.names`	Find All Names in an Expression
`all.vars`	Find All Names in an Expression
`as`	Generic Coercion Function
`as.call`	Calling Functions
`as.character.condition`	Condition Handling and Recovery
`as.character.error`	Condition Handling and Recovery
`as.double`	Double Precision Objects
`as.double.difftime`	Double Precision Objects
`as.double.POSIXlt`	Double Precision Objects
`as.expression`	Expression Objects
`as.function`	Function Objects
`as.integer`	Integer Objects
`as.name`	Names and Symbols
`as.symbol`	Names and Symbols
`assign`	Assign Object to Environment
`attachNamespace`	Loading and Unloading Namespaces
`baseenv`	Environment Access
`bquote`	Partial Substitution in Expressions
`break`	Control Flow
`browser`	Browse Interactively in a Function's Frame
`call`	Calling Functions
`charmatch`	Partial Matching of Character Strings
`chkDots`	Manipulate Ellipsis Arguments
`computeRestarts`	Condition Handling and Recovery
`condition`	Condition Handling and Recovery
`conditionCall`	Condition Handling and Recovery
`conditionCall.condition`	Condition Handling and Recovery
`conditionMessage`	Condition Handling and Recovery
`conditionMessage.condition`	Condition Handling and Recovery
`conditions`	Condition Handling and Recovery
`Control`	Control Flow
`delete.response`	Modify Terms Objects
`deparse`	Turn a Parsed Expression into Character Form
`deparse1`	Turn a Parsed Expression into Character Form
`dir`	List the Files in a Directory
`do.call`	Execute a Function Call
`dontCheck`	Return Argument Unaltered
`double`	Double Precision Objects
`drop.terms`	Modify Terms Objects
`else`	Control Flow
`emptyenv`	Environment Access
`environment`	Environment Access
`environment<-`	Environment Access
`environmentName`	Environment Access
`errorCondition`	Condition Handling and Recovery
`eval`	Evaluate an Expression
`eval.parent`	Evaluate an Expression
`evalq`	Evaluate an Expression
`existsFunction`	Get Function from Environment
`expression`	Expression Objects
`Filter`	Common Higher-Order Functions
`Find`	Common Higher-Order Functions
`findRestart`	Condition Handling and Recovery
`for`	Control Flow
`forceAndCall`	Call a Function with Some Arguments Forced
`formals`	Access and Manipulate the Formal Arguments
`formals<-`	Access and Manipulate the Formal Arguments
`function`	The Structure of Expressions
`geterrmessage`	Error and Warning Messages
`getExportedValue`	Get Namespace Environment Information
`getFunction`	Get Function from Environment
`getNamespace`	Get Namespace Environment Information
`getNamespaceExports`	Get Namespace Environment Information
`getNamespaceImports`	Get Namespace Environment Information
`getNamespaceName`	Get Namespace Environment Information
`getNamespaceUsers`	Get Namespace Environment Information
`getNamespaceVersion`	Get Namespace Environment Information
`getTaskCallbackNames`	Manage Top-Level Task Callbacks
`globalenv`	Environment Access
`history`	Print History of Evaluated Expressions
`identity`	Return Argument Unaltered
`if`	Control Flow
`in`	Control Flow
`integer`	Integer Objects
`interactive`	Test For Interactive Execution
`invisible`	Mark Function as Non-Printing
`invokeRestart`	Condition Handling and Recovery
`invokeRestartInteractively`	Condition Handling and Recovery
`is.atomic`	Test for Atomic or Recursive Objects
`is.call`	Calling Functions
`is.double`	Double Precision Objects
`is.environment`	Environment Access
`is.expression`	Expression Objects
`is.function`	Function Objects
`is.integer`	Integer Objects
`is.language`	Test for Atomic or Recursive Objects
`is.name`	Names and Symbols
`is.R`	Test If Running Under an R Compatible Engine
`is.recursive`	Test for Atomic or Recursive Objects
`is.symbol`	Names and Symbols
`isBaseNamespace`	Check if an Environment is a (base) Namespace Environment
`isNamespace`	Check if an Environment is a (base) Namespace Environment
`isNamespaceLoaded`	Get Namespace Environment Information
`isRestart`	Condition Handling and Recovery
`languageEl`	Extract or Replace Parts of Expressions
`list.dirs`	List the Files in a Directory
`list.files`	List the Files in a Directory
`loadedNamespaces`	Loading and Unloading Namespaces
`loadhistory`	Print History of Evaluated Expressions
`loadNamespace`	Loading and Unloading Namespaces
`local`	Evaluate an Expression
`make.names`	Make Character Strings into Legal Names
`make.unique`	Make Character Strings Unique
`Map`	Common Higher-Order Functions
`match.arg`	Verify an Argument Using Partial Matching
`match.call`	Argument Matching
`match.fun`	Function Verification for "Function Variables"
`message`	Diagnostic Messages
`missing`	Check for Missing Arguments
`mode`	Data Mode of the Values in a Vector
`name`	Names and Symbols
`nargs`	Number of Arguments to Function
`Negate`	Common Higher-Order Functions
`new.env`	Environment Access
`next`	Control Flow
`NextMethod`	Methods Invoked from Functions
`on.exit`	Exit Expression For a Function
`packageStartupMessage`	Diagnostic Messages
`parent.env`	Environment Access
`parent.env<-`	Environment Access
`parent.frame`	Get the System Evaluator State
`parse`	Parse Expressions
`Position`	Common Higher-Order Functions
`print.condition`	Condition Handling and Recovery
`print.restart`	Condition Handling and Recovery
`R.version`	Version Information
`R.Version`	Version Information
`R.version.string`	Version Information
`readline`	Read a Line from the Terminal
`readLines`	Read or Write Multiple Lines from or to a Connection
`Recall`	Recursive Call of the Current Function
`Reduce`	Common Higher-Order Functions
`reformulate`	Modify Terms Objects
`reg.finalizer`	Finalization of Objects
`removeTaskCallback`	Manage Top-Level Task Callbacks
`repeat`	Control Flow
`requireNamespace`	Loading and Unloading Namespaces
`restartDescription`	Condition Handling and Recovery
`restartFormals`	Condition Handling and Recovery
`return`	The Structure of Expressions
`S3Part`	S4 Classes that Contain S3 Classes
`savehistory`	Print History of Evaluated Expressions
`setAs`	Generic Coercion Function
`setNamespaceInfo`	Access Namespace Environment Information
`signalCondition`	Condition Handling and Recovery
`simpleCondition`	Condition Handling and Recovery
`simpleError`	Condition Handling and Recovery
`simpleMessage`	Condition Handling and Recovery
`simpleWarning`	Condition Handling and Recovery
`sleep`	Sleep for a Specified Period
`slice.index`	Slice Identification in an Array
`stop`	Error and Warning Messages
`stopifnot`	Stop if Not All True
`storage.mode`	Data Mode of the Values in a Vector
`str2expression`	Parse Expressions
`str2lang`	Parse Expressions
`substitute`	Substitute in an Expression
`substituteDirect`	Substitute in an Expression
`suppressMessages`	Diagnostic Messages
`suppressPackageStartupMessages`	Diagnostic Messages
`suppressWarnings`	Error and Warning Messages
`switch`	Evaluate One of Several Expressions
`Syntax`	The Structure of Expressions
`sys.call`	Get the System Evaluator State
`sys.calls`	Get the System Evaluator State
`sys.frame`	Get the System Evaluator State
`sys.frames`	Get the System Evaluator State
`sys.function`	Get the System Evaluator State
`sys.nframe`	Get the System Evaluator State
`sys.on.exit`	Get the System Evaluator State
`sys.parent`	Get the System Evaluator State
`sys.parents`	Get the System Evaluator State
`Sys.sleep`	Sleep for a Specified Period
`sys.status`	Get the System Evaluator State
`system`	Invoke a System Command
`taskCallbackManager`	Create an R-level Task Callback Manager
`tempdir`	Create Unique Names for Files
`tempfile`	Create Unique Names for Files
`timestamp`	Print History of Evaluated Expressions
`topenv`	Top-Level Environment
`trace`	Trace Calls to Functions
`traceback`	Print Call Stack After Error
`try`	Continue after errors
`tryCatch`	Condition Handling and Recovery
`unimplementedStop`	Functions for Handling Unimplemented Functions and Arguments
`unimplementedWarning`	Functions for Handling Unimplemented Functions and Arguments
`unlink`	Remove Files and Directories
`unloadNamespace`	Loading and Unloading Namespaces
`untrace`	Trace Calls to Functions
`UseMethod`	Methods Invoked from Functions
`version`	Version Information
`warning`	Error and Warning Messages
`warningCondition`	Condition Handling and Recovery
`while`	Control Flow
`with`	Evaluates an expression in a given context
`with.default`	Evaluates an expression in a given context
`withCallingHandlers`	Condition Handling and Recovery
`within`	Evaluates an expression in a given context
`within.data.frame`	Evaluates an expression in a given context
`within.list`	Evaluates an expression in a given context
`withRestarts`	Condition Handling and Recovery
`writeLines`	Read or Write Multiple Lines from or to a Connection