XML parser for D

This is my implementation of an XML parser for the D programming language. I'm no longer actively working on it, but I might review changes and accept them if you send me pull requests.

Module mfr.range

Two functions to abstract the consumption and retention of the consumed content of a range. The 'consumeEx' function hasn't proven flexible enough for some things in mfr.xmltok however, so it currently isn't used.

Untested with ranges other than arrays.

Module mfr.byunit

Implements frontUnit and popFrontUnit so you can easily check ASCII characters and later skip over them without triggering the UTF-8 multibyte sequence decoder.

Module mfr.xmltok

Implements various token structs, a tokenize function (which is the actual tokenizer), a XML writer class, and a forward range for iterating over tokens.

Also provides functions for detecting a BOM and reading the xml declaration. The higher-level parser is responsible for calling these function and act accordingly, especially managing the encoding.

Most of the parsing is actually implemented in private functions called by tokenize.

Current issues:

• Would probably support wstring and dstring as input without much hassle, but tokens are defined to contain UTF-8 strings. Do we need to make tokens templated structs? Or should we wrap the whole parser (with it's token types) in one big template/struct?

Still to do:

• throw meaningful exceptions types instead of plain Exception
• adapt it so it can work with various ranges
• add unit tests for BOM and xml declaration checking.

Probably low priority:

• implement parsing of DTD internal subset
• add some sort of callback for user-defined entities

Module mfr.xml

Implements a simple XML tree. Nothing really special about it, except that its built on mfr.xmltok;

Still to do:

• Handle BOM and encoding info in XML declaration; currently only UTF-8 is supported.