File: tyvars.doc

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\DOC tyvars

\TYPE {tyvars : hol_type -> hol_type list}

\SYNOPSIS
Returns a list of the type variables in a type.

\DESCRIBE
When applied to a type, {tyvars} returns a list (possibly empty) of the type
variables that it involves.

\FAILURE
Never fails.

\EXAMPLE
{
  # tyvars `:(A->bool)->A`;;
  val it : hol_type list = [`:A`]
}

\SEEALSO
type_vars_in_term.

\ENDDOC