/src/LinFu.AOP/Extensions/MethodDefinitionExtensions.cs

 1using System;
 2using Mono.Cecil;
 3using Mono.Cecil.Cil;
 4
 5namespace LinFu.AOP.Cecil.Extensions
 6{
 7    /// <summary>
 8    ///     Represents an extension class that adds helper methods to the <see cref="MethodDefinition" /> type.
 9    /// </summary>
10    public static class MethodDefinitionExtensions
11    {
12        /// <summary>
13        ///     Adds a local variable to the given method.
14        /// </summary>
15        /// <param name="methodDef">The target method.</param>
16        /// <param name="localType">The variable type.</param>
17        /// <returns>A local variable definition.</returns>
18        public static VariableDefinition AddLocal(this MethodDefinition methodDef, Type localType)
19        {
20            var declaringType = methodDef.DeclaringType;
21            var module = declaringType.Module;
22            var variableType = module.Import(localType);
23            var result = new VariableDefinition(variableType);
24
25            methodDef.Body.Variables.Add(result);
26
27            return result;
28        }
29    }
30}