Language.Copilot.Analyser

This module provides a way to check that a Copilot specification is compilable

Main error checking functions

check :: StreamableMaps Spec -> Maybe Error

Check a Copilot specification. If it is not compilable, then returns an error describing the issue. Else, returns Nothing

data Error

Used for representing an error in the specification, detected by check

Constructors

BadSyntax String Var

the BNF is not respected

BadDrop Int Var

A drop expression of less than 0 is used

BadSamplingPhase Var Var Phase

if an external variable is sampled at phase 0 then there is no time for the stream to be updated

BadSamplingArrPhase Var Var Phase

if an external variable is sampled at phase 0 then there is no time for the stream to be updated

BadPArrSpec Var Var String

External array indexes can only take variables or constants as indexes.

BadType Var Var

either a variable is not defined, or not with the good type ; there is no implicit conversion of types in Copilot

NonNegativeWeightedClosedPath [Var] Weight

The algorithm to compile Copilot specification can only work if there is no negative weighted closed path in the specification, as described in the original research paper

DependsOnClosePast [Var] Var Weight Weight

Could be compiled, but would need bigger prophecyArrays

DependsOnFuture [Var] Var Weight

If an output depends of a future of an input it will be hard to compile to say the least

Instances

Show Error

data SpecSet

Constructors

AllSpecSet

FunSpecSet

DropSpecSet

PArrSet

Instances

Eq SpecSet

Varied other things

getExternalVars :: StreamableMaps Spec -> [Exs]

data ExtVars

Constructors

ExtV Phase

ExtA Phase String

Instances

Eq ExtVars