jgm · Oct 20, 2026 · Oct 20, 2026
diff --git a/src/Text/TeXMath/Writers/Typst.hs b/src/Text/TeXMath/Writers/Typst.hs
@@ -144,6 +144,8 @@ writeExp (EMathOperator s)
     = s
   | otherwise = "\"" <> s <> "\""
 writeExp (EGrouped es) = writeExps es
+writeExp (EFraction NoLineFrac e1 e2) =
+  "mat(delim: #none, " <> mkArray [[[e1]], [[e2]]] <> ")"
 writeExp (EFraction _fractype e1 e2) =
   case (e1, e2) of
     (EGrouped _, _) -> "frac(" <> writeExp e1 <> ", " <> writeExp e2 <> ")"

diff --git a/test/writer/typst/choose.test b/test/writer/typst/choose.test
@@ -18,4 +18,4 @@
     ]
 ]
 >>> typst
-binom(a, {frac(b, c + 2)})
+binom(a, {mat(delim: #none, b; c + 2)})
diff --git a/test/writer/typst/genfrac.test b/test/writer/typst/genfrac.test
@@ -6,4 +6,4 @@
     ]
 ]
 >>> typst
-{x / y}
+{mat(delim: #none, x; y)}
diff --git a/test/writer/typst/nolinefrac.test b/test/writer/typst/nolinefrac.test
@@ -0,0 +1,9 @@
+<<< tex
+{a \atop b} \quad
+\genfrac{}{}{0pt}{}{a + b}{c + d} \quad
+\genfrac{[}{]}{0pt}{}{a}{b} \quad
+\genfrac{}{}{0pt}{}{}{b} \quad
+\genfrac{}{}{0pt}{}{a}{} \quad
+\binom{a}{b} \quad \frac{a}{b}
+>>> typst
+mat(delim: #none, a; b) quad mat(delim: #none, a + b; c + d) quad [mat(delim: #none, a; b)] quad mat(delim: #none, #none; b) quad mat(delim: #none, a; #none) quad binom(a, b) quad a / b
-Original file line number
+Diff line change
@@ Expand Up / @@ -6,4 +6,4 @@ @@
         ]
     ]
     >>> typst
-    {x / y}
+    {mat(delim: #none, x; y)}