Add Modulo/remainder operator which is in amsmath

CHANGELOG.md

@@ -3,6 +3,10 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning v2.0.0](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+### Added
+- [#262: Add \mod operator from amsmath][pull-262]
+
 ## [0.10.0] - 2021-07-06
 ### Changed
 - (**Breaking change!**) Removed support for .NET Core 3.0. .NET Core 3.1 or later is supported from now (.NET Framework 4.5.2 is still supported; .NET 5.0 or later is supported, too).
@@ -186,6 +190,7 @@ This was the initially published version. It consisted entirely of the original
 [pull-253]: https://github.com/ForNeVeR/wpf-math/pull/253
 [pull-254]: https://github.com/ForNeVeR/wpf-math/pull/254
 [pull-261]: https://github.com/ForNeVeR/wpf-math/pull/261
+[pull-262]: https://github.com/ForNeVeR/wpf-math/pull/262
 [pull-277]: https://github.com/ForNeVeR/wpf-math/pull/277
 [pull-283]: https://github.com/ForNeVeR/wpf-math/pull/283
 

src/WpfMath.Tests/ParserTests.fs

@@ -104,6 +104,10 @@ let sin() =
 let intF() =
     verifyParseResult @"\int f"
 
+[<Fact>]
+let ``mod``() =
+    verifyParseResult @"\mod"
+
 [<Fact>]
 let emptyCurlyBraces() =
     verifyParseResult @"{}"

src/WpfMath.Tests/TestResults/ParserTests.mod.approved.txt

@@ -0,0 +1,80 @@
+{
+  "RootAtom": {
+    "[AtomType]": "BigOperatorAtom",
+    "BaseAtom": {
+      "[AtomType]": "RowAtom",
+      "Elements": [
+        {
+          "[AtomType]": "CharAtom",
+          "Character": "m",
+          "IsTextSymbol": false,
+          "Source": {
+            "End": 9,
+            "Length": 1,
+            "Source": "\\mathrm{mod}",
+            "SourceName": "Predefined formula fragment",
+            "Start": 8
+          },
+          "TextStyle": "mathrm",
+          "Type": "Ordinary"
+        },
+        {
+          "[AtomType]": "CharAtom",
+          "Character": "o",
+          "IsTextSymbol": false,
+          "Source": {
+            "End": 10,
+            "Length": 1,
+            "Source": "\\mathrm{mod}",
+            "SourceName": "Predefined formula fragment",
+            "Start": 9
+          },
+          "TextStyle": "mathrm",
+          "Type": "Ordinary"
+        },
+        {
+          "[AtomType]": "CharAtom",
+          "Character": "d",
+          "IsTextSymbol": false,
+          "Source": {
+            "End": 11,
+            "Length": 1,
+            "Source": "\\mathrm{mod}",
+            "SourceName": "Predefined formula fragment",
+            "Start": 10
+          },
+          "TextStyle": "mathrm",
+          "Type": "Ordinary"
+        }
+      ],
+      "PreviousAtom": null,
+      "Source": {
+        "End": 11,
+        "Length": 3,
+        "Source": "\\mathrm{mod}",
+        "SourceName": "Predefined formula fragment",
+        "Start": 8
+      },
+      "Type": "Ordinary"
+    },
+    "LowerLimitAtom": null,
+    "Source": {
+      "End": 11,
+      "Length": 3,
+      "Source": "\\mathrm{mod}",
+      "SourceName": "Predefined formula fragment",
+      "Start": 8
+    },
+    "Type": "BigOperator",
+    "UpperLimitAtom": null,
+    "UseVerticalLimits": false
+  },
+  "Source": {
+    "End": 4,
+    "Length": 4,
+    "Source": "\\mod",
+    "SourceName": "User input",
+    "Start": 0
+  },
+  "TextStyle": null
+}

src/WpfMath/Data/PredefinedTexFormulas.xml

@@ -375,6 +375,15 @@
     <Return name="f" />
   </Formula>
 
+  <Formula name="mod" enabled="true">
+    <CreateFormula name="f" />
+    <MethodInvocation name="AddOperator" formula="f">
+      <Argument type="string" value="\mathrm{mod}" />
+      <Argument type="bool" value="false" />
+    </MethodInvocation>
+    <Return name="f" />
+  </Formula>
+
   <Formula name="tanh" enabled="true">
     <CreateFormula name="f" />
     <MethodInvocation name="AddOperator" formula="f">