Add min and max functions

CHANGELOG.md

@@ -14,6 +14,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Added a new method, `Dialogue.GetHeaderValue`, which returns the value of the specified header on a node.
 - Language Server: Nodes that are part of a node group now show their condition complexity as a code lens.
 - Added a new method, `Dialogue.HasSalientContent(nodegroup)`, which returns a bool if there is any salient content for the requested nodegroup.
+- Added `min(a,b)` and `max(a,b)` to the standard library.
 
 ### Changed
 

YarnSpinner.LanguageServer.Tests/TestData/ActionDeclarationTests/ActionDeclarations.yarn

@@ -19,4 +19,6 @@ title: ActionDeclarations
 {decimal(2.3)}
 {int(2.3)}
 {format("{0:F2}", 1)}
+{min(2,3)}
+{max(4,5)}
 ===

YarnSpinner.LanguageServer/src/Server/Documentation/BuiltInFunctionsAndCommands.ysls.json

@@ -304,6 +304,48 @@
       ],
       "ReturnType": "number"
     },
+    {
+      "YarnName": "min",
+      "DefinitionName": "min",
+      "Documentation": "Compares a and b, and returns the smaller of the two.",
+      "Signature": "min(a,b)",
+      "Parameters": [
+        {
+          "Name": "a",
+          "Type": "number",
+          "Documentation": "The first number to compare.",
+          "IsParamsArray": false
+        },
+        {
+          "Name": "b",
+          "Type": "number",
+          "Documentation": "The second number to compare.",
+          "IsParamsArray": false
+        }
+      ],
+      "ReturnType": "number"
+    },
+    {
+      "YarnName": "max",
+      "DefinitionName": "max",
+      "Documentation": "Compares a and b, and returns the larger of the two.",
+      "Signature": "max(a,b)",
+      "Parameters": [
+        {
+          "Name": "a",
+          "Type": "number",
+          "Documentation": "The first number to compare.",
+          "IsParamsArray": false
+        },
+        {
+          "Name": "b",
+          "Type": "number",
+          "Documentation": "The second number to compare.",
+          "IsParamsArray": false
+        }
+      ],
+      "ReturnType": "number"
+    },
     {
       "YarnName": "format",
       "DefinitionName": "format",

YarnSpinner/Dialogue.cs

@@ -1277,6 +1277,9 @@ public StandardLibrary()
                 });
 #pragma warning restore CA5394 // System.Random is cryptographically insecure
 
+                this.RegisterFunction("min", (float a, float b) => Math.Min(a, b));
+                this.RegisterFunction("max", (float a, float b) => Math.Max(a, b));
+
                 this.RegisterFunction<float, int>("round", (float num) =>
                 {
                     return (int)Math.Round(num);