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View Code? Open in Web Editor NEWToward Behavioral Type checking for Rholang
License: Apache License 2.0
Toward Behavioral Type checking for Rholang
License: Apache License 2.0
On Apr 22, he referred me to https://github.com/rchain/pi4u/tree/master/AFreshProofTheoryForLADL :
That’s behind our current work by about 2 weeks. We’re incorporating this paper. That allows us to eliminate most of the contextualized resourced theory, but it has the consequence of adding meta-variables to our type judgments.
i am evaluating Kiama as an input format for the theories LADL takes as input by implementing the rho-combinator paper. The code for this implementation is here.
Also from DAO bug typing:
type TB = <getBalance>?( <rtn>! | TB )
+ <deposit>?( <ackDeposit>?TB )
+ <users.keys>( <ackWithdraw>?TB + <ackSend>?TB )
The line above says "... we simply disjoin the types of each case ..." which tells us how to read +
. But logic.ml doesn't have disjunction. Ah... SLMC does:
| Or of formastnode * formastnode
We also exhibit nontrivial formulae encoding confinement and liveness properties for a reflective
higher-order variant of the π-calculus.
-- LADL
Holistic Specifications for Robust Programs Sophia Drossopoulou Feb 2020 - how much overlap with behavioral types?
https://github.com/Agoric/agoric-sdk/blob/master/packages/ERTP/src/types.js
@leithaus why is equal tested both ways? Did you mean to write subset or something?
else if ((ProcessSet.equal ipSet gpSet) || (ProcessSet.equal gpSet ipSet))
https://github.com/leithaus/rhocaml/blob/master/mc.ml#L127
I transcribed it somewhat literally:
else if ((ipSet == gpSet) || (gpSet == ipSet)) ///@@@@?@?@?@?
https://github.com/rchain-community/behavr/blob/master/src/main/scala/rho/Model.scala#L125
using
@
), lift / send and activity / inputor
, (maxfix X F)
and forall
we get:
@(maxfix X
forall m .
m!(forall n. 0 or n!(X) or (maxfix Y { forall n' . for(n' <- b){ X or Y} }
or (X | X ) ) )
I used KaTex to get:
$\phi_{info} = \q{ \rec{X} {\forall m . \lift{m}{\forall n. 0 \lor \lift{n}{X} \lor \rec{Y}{\forall n' . \act{n'}{b}{(X \lor Y)} } \lor (X | X ) }} }$
macros:
{
"\\q": "\\ulcorner #1 \\urcorner",
"\\lift": "#1 \\langle\\lvert #2 \\rvert\\rangle",
"\\act": "\\langle #1 ? #2 \\rangle #3",
"\\rec": "\\mathrm{rec} #1 . ( #2 )"
}
This was sort of news to me:
Our new MPST theory is a case of behavioural type system: it treats types as
simple processes that reduce and evolve along a typed computation; and since types are simpler
than programs, they can be analysed with simpler methods (e.g., finite model checking via our
parameter φ, cf. ğ6).
found via https://lobste.rs/t/formalmethods
https://github.com/rchain/pi4u/tree/master/Name-free%20combinators%20for%20concurrency%20rhocomb Latest commit
e5e10a2
16 hours ago
from DAO bug typing:
CT( get, set ) = <get( rtn )>?( <rtn>! | CT( get, set ) ) + <set( nv )>?( CT( get, set ) )
I'm not sure how to read that... in particular get( rtn )
. Does +
mean Mixture / separation? If so, then what does |
mean? Does +
mean Conjunction???
0 | @0!(0) | @0!(0)
is equivalent to (0 | @0!(0)) | @0!(0)
right?
both are equivalent to @0!(0) | @0!(0)
Either my transcription to scala is wrong or there's a bug in rhocaml.
IOU: README
context:
@leithaus in the rholang interpreter, processes can be normalized, compared, and sorted. Any particular reason rho.ml doesn't implement structural equivalence by normalization and comparison?
Is rho calculus strongly normalizing?
cc @Jake-Gillberg whose Rho.scala does structural equivalence by way of normalization.
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