pryr: assign-constant – R documentation

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assign-constant

Create a constant (locked) binding.

Description

Infix wrapper for assign + lockBinding that creates a constant: a binding whose value can not be changed.

Usage

x %<c-% value

Arguments

`x`	unquoted expression naming variable to create
`value`	constant value

Examples

x %<c-% 10
#' Generates an error:
## Not run: x <- 20

# Note that because of R's operator precedence rules, you
# need to wrap compound RHS expressions in ()
y %<c-% 1 + 2
y
z %<c-% (1 + 2)
z

pryr

Tools for Computing on the Language

v0.1.4

GPL-2

Authors

Hadley Wickham [aut, cre], R Core team [ctb] (Some code extracted from base R)

Initial release