Crate tex_engine

Work In Progress

An implementation of a generic TeX engine, the core of the TeX typesetting system. This crate largely follows an object-oriented design for modularity and adaptability, with functionality largely implemented in generic traits. This lets the compiler optimize the code for the specific types used, while still allowing for easy customization.

A specific Engine combines:

• a Mouth that provides Tokens to process

• a Gullet that expands macros and returns primitives (StomachCommands),

• a State that keeps track of the current state of the engine, e.g. the current CategoryCodeScheme, and allows for pushing/popping the stack,

• a Stomach that processes the StomachCommands and returns TeXBoxes.

  Almost all algorithms, too, are generic over implementations of these traits. The default Engine for plain TeX/LaTeX can be found in PlainTeXEngine.

Modules

engine

Components of a TeX engine, such as Mouth and State

tex

Basic TeX concepts, such as Tokens, CategoryCodes and Commands.

utils

Macros

catch

debug_log

file_end

map_group

register_assign

register_conditional

register_dim_assign

register_gullet

register_int

register_int_assign

register_stomach

register_tok_assign

register_value_assign_int

register_whatsit