Register an eltwise operation. — register

Stores a user-defined element-wise function under the given name so that it can be retrieved by get_eltwise() and invoked during query evaluation.

Usage

register_eltwise(name, fn, overwrite = FALSE, source = NULL)

Arguments

name: Op name (character scalar, matches token in query strings).
fn: Function function(x, ...) where x is a numeric vector or matrix (eltwise ops preserve shape) and ... collects named parameters.
overwrite: Logical scalar; set to TRUE to replace an already- registered operation.
source: Optional "file:line" string identifying where the registration happened. Used in the conflict error message; auto-captured from the caller's srcref if omitted.

Value

Invisibly NULL.

Examples

register_eltwise("Clamp01", function(x, ...) pmin(pmax(x, 0), 1),
                 overwrite = TRUE)
registered_eltwise()
#>  [1] "Abs"         "Clamp"       "Clamp01"     "Convert"     "Exp"        
#>  [6] "Fraction"    "Log"         "Round"       "Significant" "Sqrt"