operators: Return the _names_ of defined operators.

In decisionpatterns/operator.tools: Utilities for Working with R's Operators

Description

operators returns the names of defined operators. Argument types can be used to select operators of a specified type(s) or GROUPING(s). See Details for specifics.

Usage

operators(types = "REGISTERED")

Arguments

types

A character vector with the types of operators to return. The types may one or more of: 'namespace', 'component', 'indexing', 'sequence', 'arithmetic', 'relational', 'logical', 'tilde', 'assignment', 'help', 'user', or user-defined type specified in a call to setOperator. It may also be one of the special groups: 'REG(ISTERED)', 'UNREG(ISTERED)', 'SPECIAL', 'ALL'. See Details. operators provides the names of defined operators. These can be either registered operators (using setOperators), or unregistered operators definde by the %any% syntax. By default, only registered operators are returned. This is purely for performance reasons as an exhausting search for %any% functions is expensive. See Syntax.for the core R operators types may also be one a special operator groupings: REG(ISTERED): (Default). Those registered by setOperators UNREG(ISTERED): Unregisted operators, requires expensive search. ALL: All operators, requires expensive search of environments. SPECIAL: All operators defined using the %any% syntax.

Value

character vector of unique operator names.

Note

The right arrow assignment operators, -> and ->> is not an operator but a syntatic variant. Consequently, it does not behave properly as an operator. They are omitted from the operator list as they are not correctly identified as primitives or functions by the R language.

Author(s)

Christopher Brown

References

https://cran.r-project.org/doc/manuals/R-lang.html https://bugs.r-project.org/bugzilla3/show_bug.cgi?id=14310

See Also

Syntax, setOperator, setOperators, and the help files on the individial operators.

Examples

 ## Not run:  
  operators()
  operators( types="arithmetic" )
  operators( types=c("arithmetic","logical" ) )
  operators( types='ALL' )
  operators( types='REG' )
  operators( types='UNREG' )
  operators( types='SPECIAL' )
 
## End(Not run)

decisionpatterns/operator.tools documentation built on Sept. 21, 2017, 10:30 p.m.