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1. module Data.GraphViz.PreProcessing

   "Real life" Dot code contains various items that are not directly parseable by this library. This module defines the preProcess function to remove these components, which include:

   • Comments (both /* ... */ style and // ... style);
   • Pre-processor lines (lines starting with a #);
   • Split lines (by inserting a \ the rest of that "line" is continued on the next line).
   • Strings concatenated together using "..." + "..."; these are concatenated into one big string.

2. module Data.GraphViz.Printing

   This module defines simple helper functions for use with Text.PrettyPrint. It also re-exports all the pretty-printing combinators from that module. Note that the PrintDot instances for Bool, etc. match those specified for use with Graphviz. You should only be using this module if you are writing custom node types for use with Data.GraphViz.Types. For actual printing of code, use printDotGraph (which produces a Text value). The Dot language specification specifies that any identifier is in one of four forms:

   • Any string of alphabetic ([a-zA-Z\200-\377]) characters, underscores ('_') or digits ([0-9]), not beginning with a digit;
   • a number [-]?(.[0-9]+ | [0-9]+(.[0-9]*)? );
   • any double-quoted string ("...") possibly containing escaped quotes (\");
   • an HTML string (<...>).
   (Note that the first restriction is referring to a byte-by-byte comparison using octal values; when using UTF-8 this corresponds to all characters c where ord c >= 128.) Due to these restrictions, you should only use text when you are sure that the Text in question is static and quotes are definitely needed/unneeded; it is better to use the Text instance for PrintDot. For more information, see the specification page: http://graphviz.org/doc/info/lang.html

3. class PrintDot a

   graphviz	Data.GraphViz.Printing

   A class used to correctly print parts of the Graphviz Dot language. Minimal implementation is unqtDot.

4. class (PrintDotRepr dg n, ParseDotRepr dg n) => PPDotRepr (dg :: Type -> Type) n

   graphviz	Data.GraphViz.Types

   This class exists just to make type signatures nicer; all instances of DotRepr should also be an instance of PPDotRepr.

5. class ParseDot a

   graphviz	Data.GraphViz.Types

   No documentation available.

6. class (DotRepr dg n, ParseDot dg n) => ParseDotRepr (dg :: Type -> Type) n

   graphviz	Data.GraphViz.Types

   This class exists just to make type signatures nicer; all instances of DotRepr should also be an instance of ParseDotRepr.

7. type Path = Seq Maybe GraphID

   graphviz	Data.GraphViz.Types

   The path of clusters that must be traversed to reach this spot.

8. class PrintDot a

   graphviz	Data.GraphViz.Types

   A class used to correctly print parts of the Graphviz Dot language. Minimal implementation is unqtDot.

9. class (DotRepr dg n, PrintDot dg n) => PrintDotRepr (dg :: Type -> Type) n

   graphviz	Data.GraphViz.Types

   This class exists just to make type signatures nicer; all instances of DotRepr should also be an instance of PrintDotRepr.

10. type ParsedJournal = Journal

    hledger-lib	Hledger.Data

    A journal in the process of being parsed, not yet finalised. The data is partial, and list fields are in reverse order.

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