Debug.SimpleExpr.GraphUtils

Tools for transforming simple expressions to graphs from graphite.

Conversion simple expressions to graphs

exprToGraph :: Expr d => d -> DGraph String ()

Transforms an expression to graph.

Examples of usage

>>> import Debug.SimpleExpr (variable)
>>> import NumHask ((+), (-))

>>> x = variable "x"
>>> y = variable "y"
>>> exprToGraph [x + y, x - y]
...

We expect something like fromList [("y",[("x-y",()),("x+y",())]),("x-y",[]),("x",[("x-y",()),("x+y",())]),("x+y",[])] depending on the packages version version.

Visualisation

plotExpr :: Expr d => d -> IO ThreadId

Visualizes an expression.

Examples of usage

>>> import Debug.SimpleExpr (number, variable)
>>> import NumHask ((+), (-))
>>> import Data.Graph.VisualizeAlternative (plotDGraphPng)

>>> plotExpr (number 1 + variable "x")

>>> x = variable "x"
>>> y = variable "y"

>>> plotExpr [x + y, x - y]

plotDGraphPng :: (Hashable v, Ord v, PrintDot v, Show v, Show e) => DGraph v e -> FilePath -> IO FilePath

A copy of toDirectedDot method from Visualize but the parameter Sfdp is replaced by Dot.

Auxiliary functions

simpleExprToGraph :: SimpleExpr -> DGraph String ()

Transforms a simple expression to graph.

appendNodeToGraph :: String -> [String] -> DGraph String () -> DGraph String ()

Appends a node to a graph using string valued keys.

The first argumet is the new node name.

The second argument is the list of dependent nodes.