valid-external-format-p

Tests whether an external format spec is valid.

external-format

valid-external-format-p ef-spec &optional env => result

`ef-spec`⇩	An external format spec.
`env`⇩	An environment across which the spec should apply.

result⇩

A boolean.

The function valid-external-format-p tests whether the external format spec ef-spec is valid (in the environment env).

result is t if ef-spec is a valid spec, and nil otherwise.

(valid-external-format-p '(:Unicode :eol-style :lf))