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2017-04-06Lua filter: Improve block filter performanceAlbert Krewinkel1-7/+44
Reading of simple block values from the lua stack is handled manually, but most block constructors are still handled via instances of aeson's Value type.
2017-04-06Lua filter: Improve inline filter performanceAlbert Krewinkel1-7/+73
Getting inline instances from the lua stack is handled manually for some simple inline constructors, including the `Str` constructor. This avoids the indirect route through aeson's Value type and improves performance considerably (approx. 30% speedup for some filters).
2017-04-02Lua module: add readers submoduleAlbert Krewinkel2-2/+147
Plain text readers are exposed to lua scripts via the `pandoc.reader` submodule, which is further subdivided by format. Converting e.g. a markdown string into a pandoc document is possible from within lua: doc = pandoc.reader.markdown.read_doc("Hello, World!") A `read_block` convenience function is provided for all formats, although it will still parse the whole string but return only the first block as the result. Custom reader options are not supported yet, default options are used for all parsing operations.
2017-03-24Ensure compatibility with hslua 0.5.*Albert Krewinkel2-2/+43
The 0.5.0 release of hslua fixes problems with lua C modules on linux. The signature of the `loadstring` function changed, so a compatibility wrapper is introduced to allow both 0.4.* and 0.5.* versions to be used.
2017-03-20Lua filters (#3514)Albert Krewinkel1-0/+47
* Add `--lua-filter` option. This works like `--filter` but takes pathnames of special lua filters and uses the lua interpreter baked into pandoc, so that no external interpreter is needed. Note that lua filters are all applied after regular filters, regardless of their position on the command line. * Add Text.Pandoc.Lua, exporting `runLuaFilter`. Add `pandoc.lua` to data files. * Add private module Text.Pandoc.Lua.PandocModule to supply the default lua module. * Add Tests.Lua to tests. * Add data/pandoc.lua, the lua module pandoc imports when processing its lua filters. * Document in MANUAL.txt.