Implementing LaTeX macros unsupported by Typst

Background

There is not always a Typst equivalent for every LaTeX macro. This document provides a guide on how to implement unsupported LaTeX macros in Typst.

The \mathscr macro

• LaTeX: \mathscr
• Implementation in Typst ^[1]

  
  #let scr(a) = text(
      font: "STIX Two Math",
      stylistic-set: 01,
  )[#math.cal(a)]

• Usage example:

  
  $
  y = scr(A) x
  $
  

The \LaTeX and \TeX macro

• LaTeX: \LaTeX
• Implementation in Typst ^[2]

  
  #let TeX = style(styles => {
    set text(font: "New Computer Modern")
    let e = measure("E", styles)
    let T = "T"
    let E = text(1em, baseline: e.height * 0.31, "E")
    let X = "X"
    box(T + h(-0.15em) + E + h(-0.125em) + X)
  })
  
  #let LaTeX = style(styles => {
    set text(font: "New Computer Modern")
    let a-size = 0.66em
    let l = measure("L", styles)
    let a = measure(text(a-size, "A"), styles)
    let L = "L"
    let A = box(scale(x: 105%, text(a-size, baseline: a.height - l.height, "A")))
    box(L + h(-a.width * 0.67) + A + h(-a.width * 0.25) + TeX)
  })
  

• Usage example:

  
  You can use #LaTeX in text environments.
  You can use $#LaTeX$ in math environments as well.
  

The \lfloor, \rfloor, \lceil, and \rceil macros

In Typst, there are floor and ceil functions to make the floor and ceiling symbols, respectively.

• LaTeX: \lfloor x \rfloor
• Typst: floor(x)
• LaTeX: \lceil x \rceil
• Typst: ceil(x)

However, you cannot use a separated left or right version of the symbols. e.g. There is no lfloor function in Typst. If you really need them, you may define them directly using their Unicode characters as the following:

• Implementation in Typst

  
  #let lfloor = $⌊$;
  #let rfloor = $⌋$;
  #let lceil = $⌈$;
  #let rceil = $⌉$;
        

• Usage example:

  
  $
  y = lfloor x rceil
  $
  

Using the op function to define custom operators

For example, if you want to define a custom operator \myopr.

• LaTeX: \newcommand{\myopr}{\operatorname{myopr}}
• Equivalent in Typst

  
  #let myopr = op("myopr");
  

• Usage example:

  
  $
  y = myopr x
  $
  

References and Credits

The following resources were used to create this document:

1. \mathscr: Typst の数式で Stylistic set したい話 #Typst - Qiita
2. \TeX and \LaTeX: How do I insert the `LaTeX` symbol in Typst? · typst/typst · Discussion #1732