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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | \DOC bndvar
\TYPE {bndvar : (term -> term)}
\SYNOPSIS
Returns the bound variable of an abstraction.
\DESCRIBE
{bndvar "\var. t"} returns {"var"}.
\FAILURE
Fails unless the term is an abstraction.
\SEEALSO
body, dest_abs.
\ENDDOC
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