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|
definition module trd
// $Id$
from rule import Rule
from graph import Node
from StdOverloaded import ==
/*
`Ruletype theap symtype rule' determines the type of `rule'.
`Theap' must be an endless supply of type variables.
`Symtype' associates type rules with the symbols that occur in `rule'.
If typing does not succeed, the function aborts.
*/
ruletype
:: .[tvar]
((Node sym var) -> .Rule tsym trvar)
.(Rule sym var)
-> .Rule tsym tvar
| == var
& == tsym
& == tvar
& == trvar
|
