Reserved                package:base                R Documentation

Reserved Words in R

Description:

     The reserved words in R's parser are

     'if' 'else' 'repeat' 'while' 'function' 'for' 'in' 'next' 'break'

     'TRUE' 'FALSE' 'NULL' 'Inf' 'NaN' 'NA' 'NA_integer_' 'NA_real_'
     'NA_complex_' 'NA_character_'

     '...' and '..1', '..2' etc, which are used to refer to arguments
     passed down from an enclosing function.

Details:

     Reserved words outside quotes are always parsed to be references
     to the objects linked to in the 'Description', and hence they are
     not allowed as syntactic names (see 'make.names').  They *are*
     allowed as non-syntactic names, e.g. inside backtick quotes.

