Internal accessor for a single cctu option

Resolves name against, in order: base::getOption("cctu_<name>"), cctu_env$options[[name]], then .cctu_default_opts[[name]]. Used inside formal-argument defaults so call sites don't have to repeat the packaged default literal.

Usage

cctu_opt(name)

Arguments

name

Option name (without the "cctu_" prefix).

Value

The resolved value, or an error if name is not a known option.