sub-.foolbox_rewrite_spec: Provide list of rewrite transformations.

In foolbox: Function Manipulation Toolbox

Description

This subscript operator is used together with rewrites to specify a sequence of transformations to apply to a new function we define.

Usage

## S3 method for class 'foolbox_rewrite_spec'
dummy[...]

Arguments

dummy	The dummy-table rewrites. It is only here because it allows us to use subscripts as part of the domain-specific language.
...	A list of rewrite functions.

See Also

<.foolbox_pipe

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

foolbox documentation built on May 1, 2019, 8:44 p.m.