( DataSource(..)
, MentionedVars(..)
+ , ApplyMentionedVarsOf(..)
- , Expr
- , CommonExpr
+ , IsExpr
+ , IsCommonExpr
, IterativeExpr
- , AggregativeExpr
+ , IsAggregativeExpr
- , ExprSet
- , CommonExprSet
+ , IsExprSet
+ , IsCommonExprSet
, Constant(..)
- , VarName(..)
+ , IsVarName(..)
, Variable(..)
- , VariableSet
+ , IsVariableSet
, CommonUnaryOp(..)
, CommonBinaryOp(..)
, CommonTrinaryOp(..)
-- referred to as \"virtual\" or \"computed\" columns.
--
-- FIXME: doc links
- | forall a. CommonExpr a => COMPUTE {
+ | forall a. IsCommonExpr a => COMPUTE {
dsName :: !String
-- |rpn-expression defines the formula used to compute the
-- PDPs of a COMPUTE data source from other data sources in
, dsExpr = AverageOf (Const 100 .*. Const 200 .*. HNil)
}
-class VariableSet (MentionedVarsOf a) => MentionedVars a where
+-- MentionedVars
+class IsVariableSet (MentionedVarsOf a) => MentionedVars a where
type MentionedVarsOf a
-class (Show e, Eq e) => Expr e
-class Expr e => CommonExpr e
-class Expr e => IterativeExpr e
-class Expr e => AggregativeExpr e
-instance CommonExpr e => IterativeExpr e
+-- ApplyMentionedVarsOf
+data ApplyMentionedVarsOf = ApplyMentionedVarsOf
-class (Show es, Eq es, HList es) => ExprSet es
-instance ExprSet HNil
-instance (Expr e, ExprSet es) => ExprSet (HCons e es)
+instance Applyable ApplyMentionedVarsOf a where
+ type Apply ApplyMentionedVarsOf a = MentionedVarsOf a
+ apply = undefined
-class (Show es, Eq es, HList es) => CommonExprSet es
-instance CommonExprSet es => ExprSet es
-instance CommonExprSet HNil
-instance (CommonExpr e, CommonExprSet es) => CommonExprSet (HCons e es)
+-- IsExpr
+class (Show e, Eq e) => IsExpr e
+class IsExpr e => IsCommonExpr e
+class IsExpr e => IterativeExpr e
+class IsExpr e => IsAggregativeExpr e
+
+class (Show es, Eq es, HList es) => IsExprSet es
+instance IsExprSet HNil
+instance (IsExpr e, IsExprSet es) => IsExprSet (e :*: es)
+
+class (Show es, Eq es, HList es) => IsCommonExprSet es
+instance IsCommonExprSet HNil
+instance (IsCommonExpr e, IsCommonExprSet es) => IsCommonExprSet (e :*: es)
-- Constants and variable names
data Constant
= Const !Double
deriving (Show, Eq, Ord)
-instance Expr Constant
-instance CommonExpr Constant
+instance IsExpr Constant
+instance IsCommonExpr Constant
instance MentionedVars Constant where
type MentionedVarsOf Constant = HNil
-class (Show a, Eq a, Ord a) => VarName a where
+class (Show a, Eq a, Ord a) => IsVarName a where
varName :: a -> String
data Variable vn
= Variable !vn
deriving (Show, Eq, Ord)
-instance VarName vn => Expr (Variable vn)
-instance VarName vn => CommonExpr (Variable vn)
-instance VarName vn => MentionedVars (Variable vn) where
+instance IsVarName vn => IsExpr (Variable vn)
+instance IsVarName vn => IsCommonExpr (Variable vn)
+instance IsVarName vn => MentionedVars (Variable vn) where
type MentionedVarsOf (Variable vn) = vn :*: HNil
-class HList vs => VariableSet vs
-instance VariableSet HNil
-instance (VarName vn, VariableSet vs) => VariableSet (HCons vn vs)
+class HList vs => IsVariableSet vs
+instance IsVariableSet HNil
+instance (IsVarName v, IsVariableSet vs) => IsVariableSet (v :*: vs)
-- Common operators
data CommonUnaryOp a
| Rad2Deg !a
| Abs !a
deriving (Show, Eq, Ord)
-instance Expr a => Expr (CommonUnaryOp a)
-instance CommonExpr a => CommonExpr (CommonUnaryOp a)
-instance VariableSet (MentionedVarsOf a) => MentionedVars (CommonUnaryOp a) where
+instance IsExpr a => IsExpr (CommonUnaryOp a)
+instance IsCommonExpr a => IsCommonExpr (CommonUnaryOp a)
+instance IsVariableSet (MentionedVarsOf a) => MentionedVars (CommonUnaryOp a) where
type MentionedVarsOf (CommonUnaryOp a) = MentionedVarsOf a
data CommonBinaryOp a b
| AtanXY !a !b
deriving (Show, Eq, Ord)
-instance (Expr a, Expr b) =>
- Expr (CommonBinaryOp a b)
+instance (IsExpr a, IsExpr b) =>
+ IsExpr (CommonBinaryOp a b)
-instance (CommonExpr a, CommonExpr b) =>
- CommonExpr (CommonBinaryOp a b)
+instance (IsCommonExpr a, IsCommonExpr b) =>
+ IsCommonExpr (CommonBinaryOp a b)
-instance (VariableSet (MentionedVarsOf a),
- VariableSet (MentionedVarsOf b),
- VariableSet (HAppend (MentionedVarsOf a) (MentionedVarsOf b))) =>
+instance IsVariableSet (MentionedVarsOf a :++: MentionedVarsOf b) =>
MentionedVars (CommonBinaryOp a b) where
type MentionedVarsOf (CommonBinaryOp a b)
- = HAppend (MentionedVarsOf a) (MentionedVarsOf b)
+ = MentionedVarsOf a :++: MentionedVarsOf b
data CommonTrinaryOp a b c
= If !a !b !c
| Limit !a !b !c
deriving (Show, Eq, Ord)
-instance (Expr a, Expr b, Expr c)
- => Expr (CommonTrinaryOp a b c)
-instance (CommonExpr a, CommonExpr b, CommonExpr c)
- => CommonExpr (CommonTrinaryOp a b c)
+
+instance (IsExpr a, IsExpr b, IsExpr c)
+ => IsExpr (CommonTrinaryOp a b c)
+
+instance (IsCommonExpr a, IsCommonExpr b, IsCommonExpr c)
+ => IsCommonExpr (CommonTrinaryOp a b c)
+
+instance IsVariableSet (MentionedVarsOf a :++:
+ MentionedVarsOf b :++:
+ MentionedVarsOf c) =>
+ MentionedVars (CommonTrinaryOp a b c) where
+ type MentionedVarsOf (CommonTrinaryOp a b c)
+ = MentionedVarsOf a :++:
+ MentionedVarsOf b :++:
+ MentionedVarsOf c
-- SORT and REV can't be expressed in this way as they pushes possibly
-- multiple values onto the stack...
data CommonSetOp es
= AverageOf !es
deriving (Show, Eq, Ord)
-instance ExprSet es => Expr (CommonSetOp es)
-instance CommonExprSet es => CommonExpr (CommonSetOp es)
+
+instance IsExprSet es => IsExpr (CommonSetOp es)
+instance (IsExprSet es, IsCommonExprSet es) => IsCommonExpr (CommonSetOp es)
+instance IsVariableSet (HConcat (HMap ApplyMentionedVarsOf es)) =>
+ MentionedVars (CommonSetOp es) where
+ type MentionedVarsOf (CommonSetOp es)
+ = HConcat (HMap ApplyMentionedVarsOf es)
data TrendOp vn a
= Trend !(Variable vn) !a
| TrendNan !(Variable vn) !a
deriving (Show, Eq, Ord)
-instance (VarName vn, Expr a) => Expr (TrendOp vn a)
-instance (VarName vn, CommonExpr a) => CommonExpr (TrendOp vn a)
+instance (IsVarName vn, IsExpr a) => IsExpr (TrendOp vn a)
+instance (IsVarName vn, IsCommonExpr a) => IsCommonExpr (TrendOp vn a)
+instance (IsVarName vn, MentionedVars a) => MentionedVars (TrendOp vn a) where
+ type MentionedVarsOf (TrendOp vn a) = vn :*: MentionedVarsOf a
data VariableShiftPredictOp ss w vn
= VariableShiftPredictAverage !ss !w !(Variable vn)
| VariableShiftPredictSigma !ss !w !(Variable vn)
deriving (Show, Eq, Ord)
-instance (ExprSet ss, Expr w, VarName vn)
- => Expr (VariableShiftPredictOp ss w vn)
-instance (CommonExprSet ss, CommonExpr w, VarName vn)
- => CommonExpr (VariableShiftPredictOp ss w vn)
-
+instance (IsExprSet ss, IsExpr w, IsVarName vn)
+ => IsExpr (VariableShiftPredictOp ss w vn)
+instance (IsExprSet ss, IsCommonExprSet ss, IsCommonExpr w, IsVarName vn)
+ => IsCommonExpr (VariableShiftPredictOp ss w vn)
+instance ( IsVarName vn
+ , IsVariableSet (MentionedVarsOf ss :++: MentionedVarsOf w)
+ ) => MentionedVars (VariableShiftPredictOp ss w vn) where
+ type MentionedVarsOf (VariableShiftPredictOp ss w vn)
+ = vn :*: (MentionedVarsOf ss :++: MentionedVarsOf w)
+
+-- FixedShiftPredictOp
data FixedShiftPredictOp sm w vn
= FixedShiftPredictAverage !sm !w !(Variable vn)
| FixedShiftPredictSigma !sm !w !(Variable vn)
deriving (Show, Eq, Ord)
-instance (Expr sm, Expr w, VarName vn)
- => Expr (FixedShiftPredictOp sm w vn)
-instance (CommonExpr sm, CommonExpr w, VarName vn)
- => CommonExpr (FixedShiftPredictOp sm w vn)
+
+instance (IsExpr sm, IsExpr w, IsVarName vn)
+ => IsExpr (FixedShiftPredictOp sm w vn)
+
+instance (IsCommonExpr sm, IsCommonExpr w, IsVarName vn)
+ => IsCommonExpr (FixedShiftPredictOp sm w vn)
+
+instance ( IsVarName vn
+ , IsVariableSet (MentionedVarsOf sm :++: MentionedVarsOf w)
+ ) => MentionedVars (FixedShiftPredictOp sm w vn) where
+ type MentionedVarsOf (FixedShiftPredictOp sm w vn)
+ = vn :*: (MentionedVarsOf sm :++: MentionedVarsOf w)
-- Common special values
data CommonValue
| NegativeInfinity
| Now
deriving (Show, Eq, Ord)
-instance Expr CommonValue
-instance CommonExpr CommonValue
+
+instance IsExpr CommonValue
+
+instance IsCommonExpr CommonValue
+
+instance MentionedVars CommonValue where
+ type MentionedVarsOf CommonValue = HNil
-- Iterative special values
data IterativeValue
| TakenTime
| TakenLocalTime
deriving (Show, Eq, Ord)
-instance Expr IterativeValue
+
+instance IsExpr IterativeValue
+
instance IterativeExpr IterativeValue
+instance MentionedVars IterativeValue where
+ type MentionedVarsOf IterativeValue = HNil
+
+-- Iterative special values of something
data IterativeValueOf vn
= PreviousOf !(Variable vn)
deriving (Show, Eq, Ord)
-instance VarName vn => Expr (IterativeValueOf vn)
-instance VarName vn => IterativeExpr (IterativeValueOf vn)
+
+instance IsVarName vn => IsExpr (IterativeValueOf vn)
+
+instance IsVarName vn => IterativeExpr (IterativeValueOf vn)
+
+instance IsVarName vn => MentionedVars (IterativeValueOf vn) where
+ type MentionedVarsOf (IterativeValueOf vn) = vn :*: HNil
-- Aggregative operators (fairly restricted due to rrdtool's
-- restriction)
| LSLInt !(Variable vn)
| LSLCorrel !(Variable vn)
deriving (Show, Eq, Ord)
-instance VarName vn => Expr (AggregativeUnaryOp vn)
-instance VarName vn => AggregativeExpr (AggregativeUnaryOp vn)
+
+instance IsVarName vn => IsExpr (AggregativeUnaryOp vn)
+
+instance IsVarName vn => IsAggregativeExpr (AggregativeUnaryOp vn)
+
+instance IsVarName vn => MentionedVars (AggregativeUnaryOp vn) where
+ type MentionedVarsOf (AggregativeUnaryOp vn) = vn :*: HNil
-- |The 'createRRD' function lets you set up new Round Robin Database
-- (RRD) files. The file is created at its final, full size and filled
projects / hs-rrdtool.git / blobdiff