Add support for method parameters to Razor IR

src/Microsoft.AspNetCore.Razor.Language/CodeGeneration/DefaultDocumentWriter.cs

@@ -159,11 +159,35 @@ namespace Microsoft.AspNetCore.Razor.Language.CodeGeneration
                     Context.CodeWriter.Write(" ");
                 }
 
-                Context.CodeWriter
-                    .Write(node.ReturnType)
-                    .Write(" ")
-                    .Write(node.MethodName)
-                    .WriteLine("()");
+                Context.CodeWriter.Write(node.ReturnType);
+                Context.CodeWriter.Write(" ");
+
+                Context.CodeWriter.Write(node.MethodName);
+                Context.CodeWriter.Write("(");
+
+                for (var i = 0; i < node.Parameters.Count; i++)
+                {
+                    var parameter = node.Parameters[i];
+
+                    for (var j = 0; j < parameter.Modifiers.Count; j++)
+                    {
+                        Context.CodeWriter.Write(parameter.Modifiers[j]);
+                        Context.CodeWriter.Write(" ");
+                    }
+
+                    Context.CodeWriter.Write(parameter.TypeName);
+                    Context.CodeWriter.Write(" ");
+
+                    Context.CodeWriter.Write(parameter.ParameterName);
+
+                    if (i < node.Parameters.Count - 1)
+                    {
+                        Context.CodeWriter.Write(", ");
+                    }
+                }
+
+                Context.CodeWriter.Write(")");
+                Context.CodeWriter.WriteLine();
 
                 using (Context.CodeWriter.BuildScope())
                 {

src/Microsoft.AspNetCore.Razor.Language/Intermediate/MethodDeclarationIntermediateNode.cs

@@ -14,6 +14,8 @@ namespace Microsoft.AspNetCore.Razor.Language.Intermediate
 
         public string MethodName { get; set; }
 
+        public IList<MethodParameter> Parameters { get; } = new List<MethodParameter>();
+
         public string ReturnType { get; set; }
 
         public override void Accept(IntermediateNodeVisitor visitor)

src/Microsoft.AspNetCore.Razor.Language/Intermediate/MethodParameter.cs

@@ -0,0 +1,16 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System.Collections.Generic;
+
+namespace Microsoft.AspNetCore.Razor.Language.Intermediate
+{
+    public sealed class MethodParameter
+    {
+        public IList<string> Modifiers { get; } = new List<string>();
+
+        public string TypeName { get; set; }
+
+        public string ParameterName { get; set; }
+    }
+}

test/Microsoft.AspNetCore.Razor.Language.Test/CodeGeneration/DefaultDocumentWriterTest.cs

@@ -260,6 +260,24 @@ internal class TestClass : TestBase, IFoo, IBar
                     "async",
                 },
                 MethodName = "TestMethod",
+                Parameters =
+                {
+                    new MethodParameter()
+                    {
+                        Modifiers =
+                        {
+                            "readonly",
+                            "ref",
+                        },
+                        ParameterName = "a",
+                        TypeName = "int",
+                    },
+                    new MethodParameter()
+                    {
+                        ParameterName = "b",
+                        TypeName = "string",
+                    }
+                },
                 ReturnType = "string",
             });
 
@@ -279,7 +297,7 @@ internal class TestClass : TestBase, IFoo, IBar
 // <auto-generated/>
 #pragma warning disable 1591
 #pragma warning disable 1998
-internal virtual async string TestMethod()
+internal virtual async string TestMethod(readonly ref int a, string b)
 {
 }
 #pragma warning restore 1998