property/orderable.fz
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# -----------------------------------------------------------------------
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# Tokiwa Software GmbH, Germany
#
# Source code of Fuzion standard library feature orderable
#
# Author: Fridtjof Siebert (siebert@tokiwa.software)
#
# -----------------------------------------------------------------------
# orderable -- feature for immutable values that have an infix ≤ function
# predicate that defines a total order
#
# features inheriting from orderable define a total order of their values
#
# NYI: the compiler should check that features inheriting from this are
# actually immutable.
#
public orderable : property.partially_orderable
/* NYI: quantor intrinsics not supported yet:
inv
analysis: quantor.for_all2 T T fun(a, b T) => a <= b || b <= a,
*/
is
last changed: 2024-03-07