5 files changed, 27 insertions, 30 deletions
diff --git a/src/Codec/Pesto/Dot.lhs b/src/Codec/Pesto/Dot.lhs
index a0ac161..89439e0 100644
--- a/src/Codec/Pesto/Dot.lhs
+++ b/src/Codec/Pesto/Dot.lhs
@@ -15,7 +15,6 @@ image, for example.
 >		f (a, b) = show a ++ " -> " ++ show b ++ ";"
 > 		e = map f edges
 > 		n = map (\(a, b) -> show a ++ " [label=\"" ++ dotEncodeString (serialize b) ++ "\"];") nodes
->		addcolor = "#e6ee9c"
 
 > dotEncodeString = concatMap dotEncodeChar
 > dotEncodeChar '\n' = "\\n"
diff --git a/src/Codec/Pesto/Graph.lhs b/src/Codec/Pesto/Graph.lhs
index 3d28390..ed02b50 100644
--- a/src/Codec/Pesto/Graph.lhs
+++ b/src/Codec/Pesto/Graph.lhs
@@ -20,7 +20,7 @@ Language semantics
 > 	, Edge
 > 	, Edges
 > 	) where
-> import Data.Char (isSpace, toLower, isLetter)
+> import Data.Char (toLower)
 > import Data.List (sort, nub)
 > import Test.HUnit hiding (test, Node)
 > import Control.Applicative ((<$>))
@@ -39,7 +39,7 @@ This function extracts all recipes from the stream and removes both directives.
 > 		isEnd (Directive x) | x `elem` ["bonappetit", "pesto"] = True
 > 		isEnd _ = False
 > 		(between, next) = break isEnd stream
-> extract (x:xs) = extract xs
+> extract (_:xs) = extract xs
 
 Start and end directive are removed from the extracted instructions.  The
 directive “bonappetit” is optional at the end of a stream.
@@ -72,9 +72,8 @@ actions on them, put them aside and add them again.
 This function processes a list of nodes, that is instructions uniquely identified
 by an integer and returns the edges of the directed graph as a list of tuples.
 
-> toGraph nodes = edges
+> toGraph nodes = third $ foldl f (Nothing, [[]], []) nodes
 > 	where
-> 		(_, _, edges) = foldl f (Nothing, [[]], []) nodes
 
 Ingredients are simply added to the current workspace. They should for example
 appear on the shopping list.
@@ -91,6 +90,7 @@ Actions take all ingredients and tools currently on the workspace, perform some
 action with them and put the product back onto the workspace.
 
 > 		f (_, stack:sx, edges) (i, Action _) = (Just i, [i]:stack:sx, edgesTo i stack ++ edges)
+> 		f (_, [], _) (_, Action _) = undefined -- never reached
 
 Results add a label to the current workspace’s contents and move them out of
 the way. It should be a meaningful name, not just A and B obviously.
@@ -116,7 +116,7 @@ Annotations add a description to any of the previous instructions. They can be
 used to provide more information about ingredients (so “hot water” becomes
 “+water (hot)”, tools (“&oven (200 °C)”) or actions (“[cook] (XXX)”).
 
-> 		f ctx@(Nothing, s, edges) (_, Annotation _) = ctx
+> 		f ctx@(Nothing, _, _) (_, Annotation _) = ctx
 > 		f (Just prev, s, edges) (i, Annotation _) = (Just prev, s, (i, prev):edges)
 
 Unused directives or unknown instructions are danging nodes with no connection to
@@ -128,6 +128,7 @@ other nodes.
 These are helper functions:
 
 > 		addToStack (_, stack:sx, edges) i = (Just i, (i:stack):sx, edges)
+> 		addToStack (_, [], _) _ = undefined -- never reached
 > 		consumeStack (_, s, edges) i =
 > 			let
 > 				stack = dropWhile null s
@@ -208,7 +209,7 @@ to the reference in question is created.
 > 		isTarget dest (_, Result x) = lc x == lc dest
 >		isTarget dest (_, Alternative x) = lc x == lc dest
 > 		isTarget _ _ = False
-
+> findTarget _ _ = []
 
 References works before or after the result instruction.
 
@@ -267,3 +268,5 @@ Get all nodes with edges pointing towards nodeid
 
 > test = ["graph" ~: testGraph, "ref" ~: testRef, "extract" ~: testExtract]
 
+> third (_, _, x) = x
+
diff --git a/src/Codec/Pesto/Lint.lhs b/src/Codec/Pesto/Lint.lhs
index becae57..76253e8 100644
--- a/src/Codec/Pesto/Lint.lhs
+++ b/src/Codec/Pesto/Lint.lhs
@@ -6,11 +6,9 @@ Linting
 > module Codec.Pesto.Lint (lint, test, parseMetadata, extractMetadata) where
 > import Test.HUnit hiding (test, Node)
 > import Data.List (sort, isPrefixOf)
-> import Control.Applicative ((<*>), (<$>), (<*), (*>))
+> import Control.Applicative ((<*>), (<$>), (*>))
 > import Control.Monad (liftM)
 > import Text.Parsec hiding (parse)
-> import Text.Parsec.Char
-> import Data.Maybe (mapMaybe)
 > import Data.Char (isSpace)
 >
 > import Codec.Pesto.Graph hiding (test)
@@ -40,7 +38,7 @@ dangling.
 
 > rootIsResult nodes edges = case walkRoot nodes edges of
 > 	[] -> [LintResult NoRootNode []]
-> 	(i, Result _):[] -> []
+> 	(_, Result _):[] -> []
 > 	(i, _):[] -> [LintResult NonResultRootNode [i]]
 > 	xs -> [LintResult MoreThanOneRootNode (map fst xs)]
 
@@ -182,9 +180,9 @@ By definition time is a tool and not an ingredient.
 > isTime (Quantity _ unit "") | unit `elem` timeUnits = True
 > isTime _ = False
 
-> timeIsATool nodes edges = foldl f [] nodes
+> timeIsATool nodes _ = foldl f [] nodes
 > 	where
-> 		f xs n@(nodeid, Ingredient q) | isTime q = LintResult TimeIsATool [nodeid]:xs
+> 		f xs (nodeid, Ingredient q) | isTime q = LintResult TimeIsATool [nodeid]:xs
 >		f xs _ = xs
 
 > testLintQuantity = [
@@ -225,11 +223,11 @@ may be used with each of them: m (milli-), c (centi-), d (dezi-) and k (kilo
 Additionally time in s (second), min (minute), h (hour), d (day) should be
 accepted.
 
-> wellKnownUnit nodes edges = foldl f [] nodes
+> wellKnownUnit nodes _ = foldl f [] nodes
 > 	where
-> 		f xs n@(nodeid, Ingredient q) | (not . known) q =
+> 		f xs (nodeid, Ingredient q) | (not . known) q =
 > 				LintResult UnitNotWellKnown [nodeid]:xs
-> 		f xs n@(nodeid, Tool q) | (not . known) q =
+> 		f xs (nodeid, Tool q) | (not . known) q =
 > 				LintResult UnitNotWellKnown [nodeid]:xs
 >		f xs _ = xs
 > 		known (Quantity _ unit _) = unit `elem` knownUnits
@@ -339,11 +337,11 @@ Ranges
 The first amount of a range ratio must be strictly smaller than the second.
 This limitation is not enforced for ranges containing strings.
 
-> rangeFromLargerThanTo nodes edges = foldl f [] nodes
+> rangeFromLargerThanTo nodes _ = foldl f [] nodes
 > 	where
->		f xs n@(nodeid, Ingredient q) | not $ rangeOk q =
+>		f xs (nodeid, Ingredient q) | not $ rangeOk q =
 > 				LintResult RangeFromLargerThanTo [nodeid]:xs
->		f xs n@(nodeid, Reference q) | not $ rangeOk q =
+>		f xs (nodeid, Reference q) | not $ rangeOk q =
 > 				LintResult RangeFromLargerThanTo [nodeid]:xs
 >		f xs _ = xs
 > 		rangeOk (Quantity (Range (AmountRatio a) (AmountRatio b)) _ _) = a < b
@@ -360,7 +358,6 @@ This limitation is not enforced for ranges containing strings.
 Appendix
 ++++++++
 
-> type LintTest a = Nodes a -> Edges -> [LintResult]
 > data LintResult = LintResult LintStatus [NodeId] deriving (Show, Eq, Ord)
 > data LintStatus =
 > 	  NoRootNode
@@ -393,15 +390,15 @@ Every lint test checks a single aspect of the graph.
 > 	, rangeFromLargerThanTo
 > 	]
 
-> withGraph doc f = f doc nodes edges
+> withGraph doc f = f nodes edges
 >	where
 > 		(Right op) = (head . extract . snd . unzip) <$> parse ("%pesto " ++ doc)
 > 		nodes = zip [firstNodeId..] op
 > 		edges = toGraph nodes ++ resolveReferences nodes
 
-> cmpLint doc expect = withGraph doc (\doc nodes edges -> doc ~: sort (lint nodes edges) ~?= sort expect)
+> cmpLint doc expect = withGraph doc (\nodes edges -> doc ~: sort (lint nodes edges) ~?= sort expect)
 
-> cmpLintMeta doc expectLint expectMeta = withGraph doc (\doc nodes edges -> doc ~: [
+> cmpLintMeta doc expectLint expectMeta = withGraph doc (\nodes edges -> doc ~: [
 > 		  sort (lint nodes edges) ~?= sort expectLint
 > 		, liftM sort (extractMetadata nodes edges) ~?= liftM sort expectMeta
 > 		])
diff --git a/src/Codec/Pesto/Parse.lhs b/src/Codec/Pesto/Parse.lhs
index 0d4e981..d411906 100644
--- a/src/Codec/Pesto/Parse.lhs
+++ b/src/Codec/Pesto/Parse.lhs
@@ -8,8 +8,8 @@ Language syntax
 > 	, test
 > 	, Instruction(..)
 > 	, Quantity(..)
-> 	, Unit(..)
-> 	, Object(..)
+> 	, Unit
+> 	, Object
 > 	, Approximately(..)
 > 	, Amount(..)
 > 	, isResult
@@ -23,13 +23,11 @@ Language syntax
 > 	, notspace
 > 	) where
 > import Control.Applicative ((<*>), (<$>), (<*), (*>))
-> import Data.Char (isSpace, toLower, isLetter)
+> import Data.Char (isSpace)
 > import Data.Ratio ((%))
 > import Text.Parsec hiding (parse)
-> import Text.Parsec.Char
 > import Text.ParserCombinators.Parsec.Pos (newPos)
-> import Text.ParserCombinators.Parsec.Error (ParseError, Message,
-> 		errorMessages, messageEq, newErrorUnknown)
+> import Text.ParserCombinators.Parsec.Error (newErrorUnknown)
 > import Test.HUnit hiding (test)
 >
 > import Codec.Pesto.Serialize (serialize)
diff --git a/src/Codec/Pesto/Serialize.lhs b/src/Codec/Pesto/Serialize.lhs
index 6b99b4b..56babb4 100644
--- a/src/Codec/Pesto/Serialize.lhs
+++ b/src/Codec/Pesto/Serialize.lhs
@@ -4,7 +4,7 @@ Serializing
 .. class:: nodoc
 
 > module Codec.Pesto.Serialize (serialize) where
-> import Data.Char (isSpace, toLower, isLetter)
+> import Data.Char (isSpace, isLetter)
 > import Data.Ratio (numerator, denominator)
 >
 > import {-# SOURCE #-} Codec.Pesto.Parse