Mukan Erkin Törük
6852832fe8
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47 lines
1.3 KiB
Text
47 lines
1.3 KiB
Text
-------------------------- MODULE denom_sequence ----------------------------
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(**
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The implementation of denomination traces via sequences
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*)
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EXTENDS Integers, Sequences, identifiers
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CONSTANT
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Denoms,
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MaxDenomLength
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a <: b == a
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AsAddress(seq) == seq <: Seq(STRING)
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UNROLL_DEFAULT_GenSeq == { AsAddress(<< >>) }
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UNROLL_TIMES_GenSeq == 5
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\* This produces denomination sequences up to the given bound
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RECURSIVE GenSeq(_)
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GenSeq(n) ==
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IF n = 0 THEN { AsAddress(<< >>) }
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ELSE LET Shorter == GenSeq(n-1) IN
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{ Append(s,x): x \in Identifiers, s \in Shorter } \union Shorter
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DenomTraces == GenSeq(MaxDenomLength)
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ExtendDenomTrace(port, channel, denom) == AsAddress(<<port, channel>>) \o denom
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GetPort(trace) == trace[1]
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GetChannel(trace) == trace[2]
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GetDenom(trace) == SubSeq(trace, 3, Len(trace))
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NullDenomTrace == AsAddress(<< >>)
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IsNativeDenomTrace(trace) == GetPort(trace) = NullId /\ GetChannel(trace) = NullId /\ GetDenom(trace) /= NullDenomTrace
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IsPrefixedDenomTrace(trace) == GetPort(trace) /= NullId /\ GetChannel(trace) /= NullId /\ GetDenom(trace) /= NullDenomTrace
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DENOM == INSTANCE denom
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DenomTypeOK == DENOM!DenomTypeOK
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=============================================================================
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\* Modification History
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\* Last modified Thu Nov 05 15:29:21 CET 2020 by andrey
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\* Created Thu Nov 05 13:22:40 CET 2020 by andrey
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