From 4dcc7800d5b06e582e4c438117dee1059577f054 Mon Sep 17 00:00:00 2001
From: Nicolas Guillot <nicolas.guillot@myscript.com>
Date: Tue, 30 Sep 2025 09:35:29 +0200
Subject: [PATCH] [MTMathAtomFactory] add support for /mod and /pmod

---
 .../MathRender/MTMathAtomFactory.swift        |  1 +
 .../MathRender/MTMathListBuilder.swift        | 24 +++++++++++++++++++
 2 files changed, 25 insertions(+)
 mode change 100755 => 100644 Sources/SwiftMath/MathRender/MTMathListBuilder.swift

diff --git a/Sources/SwiftMath/MathRender/MTMathAtomFactory.swift b/Sources/SwiftMath/MathRender/MTMathAtomFactory.swift
index c9c678c..01fa3ba 100644
--- a/Sources/SwiftMath/MathRender/MTMathAtomFactory.swift
+++ b/Sources/SwiftMath/MathRender/MTMathAtomFactory.swift
@@ -310,6 +310,7 @@ public class MTMathAtomFactory {
         "hom" : MTMathAtomFactory.operatorWithName( "hom", limits: false),
         "exp" : MTMathAtomFactory.operatorWithName( "exp", limits: false),
         "deg" : MTMathAtomFactory.operatorWithName( "deg", limits: false),
+        "mod" : MTMathAtomFactory.operatorWithName("mod", limits: false),
 
         // Limit operators
         "lim" : MTMathAtomFactory.operatorWithName( "lim", limits: true),
diff --git a/Sources/SwiftMath/MathRender/MTMathListBuilder.swift b/Sources/SwiftMath/MathRender/MTMathListBuilder.swift
old mode 100755
new mode 100644
index d71d522..6ac754f
--- a/Sources/SwiftMath/MathRender/MTMathListBuilder.swift
+++ b/Sources/SwiftMath/MathRender/MTMathListBuilder.swift
@@ -620,6 +620,30 @@ public struct MTMathListBuilder {
             mathColorbox.colorString = color!
             mathColorbox.innerList = self.buildInternal(true)
             return mathColorbox
+        } else if command == "pmod" {
+            // A pmod command has 1 argument - creates (mod n)
+            let inner = MTInner()
+            inner.leftBoundary = MTMathAtomFactory.boundary(forDelimiter: "(")
+            inner.rightBoundary = MTMathAtomFactory.boundary(forDelimiter: ")")
+
+            let innerList = MTMathList()
+
+            // Add the "mod" operator (upright text)
+            let modOperator = MTMathAtomFactory.atom(forLatexSymbol: "mod")!
+            innerList.add(modOperator)
+
+            // Add medium space between "mod" and argument (6mu)
+            let space = MTMathSpace(space: 6.0)
+            innerList.add(space)
+
+            // Parse the argument from braces
+            let argument = self.buildInternal(true)
+            if let argList = argument {
+                innerList.append(argList)
+            }
+
+            inner.innerList = innerList
+            return inner
         } else {
             let errorMessage = "Invalid command \\\(command)"
             self.setError(.invalidCommand, message:errorMessage)