This operator is used together with rewrites to transform a function after it is defined and before it is assigned to a name.

This operator is used together with rewrites to transform a function after it is defined and before it is assigned to a name.

# S3 method for foolbox_pipe
<(pipe, fn)

Arguments

pipe	A specificiation of a a pipeline of transformations provided using the subscript operator to rewrites().
fn	The function we wish to transform.

See also

[.foolbox_rewrite_spec

rewrites

Examples

# This is a very simple inline function that require we
# provide the function body as it should be inserted.
# For a more detailed version, see the Tutorial vignette.
inline <- function(f, fn, body) {
   body <- substitute(body)
   rewrite(f) %>%
     rewrite_with(
         rewrite_callbacks() %>%
           add_call_callback(fn, function(expr, ...) body)
     )
}

g <- function(x) x**2
h <- rewrites[inline(g,y**2)] < function(y) y + g(y)
h
#> function (y) 
#> y + y^2
#> <environment: 0x1140f8548>