Module math 

Building math lists (TeX: The Program §1136–§1206, with e-TeX’s \middle and LuaTeX’s extensions).

A formula is read into an mlist of noads (see crate::nodes), which crate::mlist converts into an hlist when the formula ends. LuaTeX differences implemented here (established with black-box tests):

• there is no “insufficient symbol fonts” check;
• \mathchar, \Umathchar and math characters given by \mathchardef are accepted in horizontal mode, where they typeset the character from the text font of the family (vertical mode starts a paragraph);
• the Missing delimiter help text has no full stop after “proceed”;
• the \Umath… variants (\Uradical, \Uroot, \Umathaccent, \Uleft, \Uskewed, \Ustack, \Usuperscript, …) are supported with their keywords.

Structs

MathChar

A math character: class (0–7, 8 for “math active”), family, character.

Enums

Field

A noad field that scan_math fills.

Functions

cramped_style

cramped_style.

delcode_parts

The parts (small family, small character, large family, large character) of an internal delimiter code, or None for −1.

denom_style

denom_style.

half

half(x) (§100): x/2 rounded, with odd values rounded towards +∞.

num_style

num_style.

sub_style

sub_style.

sup_style

sup_style.