private static void AddHelloWorldToMethod(MethodDefDeclaration targetMethod, IMethod consoleWriteLine)
{
// Removes the original code from the method body. Without this, you would get exceptions:
InstructionBlock originalCode = targetMethod.MethodBody.RootInstructionBlock;
originalCode.Detach();
// Replaces the method body's content:
InstructionBlock root = targetMethod.MethodBody.CreateInstructionBlock();
targetMethod.MethodBody.RootInstructionBlock = root;
InstructionBlock helloWorldBlock = root.AddChildBlock();
InstructionSequence helloWorldSequence = helloWorldBlock.AddInstructionSequence();
using (var writer = InstructionWriter.GetInstance())
{
// Add instructions to the beginning of the method body:
writer.AttachInstructionSequence(helloWorldSequence);
// Say that what follows is compiler-generated code:
writer.EmitSymbolSequencePoint(SymbolSequencePoint.Hidden);
// Emit a call to Console.WriteLine("Hello, world!"):
writer.EmitInstructionString(OpCodeNumber.Ldstr, "Hello, world!");
writer.EmitInstructionMethod(OpCodeNumber.Call, consoleWriteLine);
writer.DetachInstructionSequence();
}
// Re-adding the original code at the end:
root.AddChildBlock(originalCode);
}
private void ReplaceOperator(TypeDefDeclaration enhancedType, MethodDefDeclaration equalityMethodDef,
bool negate)
{
InstructionBlock originalCode = equalityMethodDef.MethodBody.RootInstructionBlock;
originalCode.Detach();
InstructionBlock root = equalityMethodDef.MethodBody.CreateInstructionBlock();
equalityMethodDef.MethodBody.RootInstructionBlock = root;
var newSequence = root.AddInstructionSequence();
using (var writer = InstructionWriter.GetInstance())
{
writer.AttachInstructionSequence(newSequence);
if (enhancedType.IsValueType())
{
var canonicalType = enhancedType.GetCanonicalGenericInstance();
writer.EmitInstruction(OpCodeNumber.Ldarg_0);
writer.EmitInstructionType(OpCodeNumber.Box, canonicalType);
writer.EmitInstruction(OpCodeNumber.Ldarg_1);
writer.EmitInstructionType(OpCodeNumber.Box, canonicalType);
}
else
{
writer.EmitInstruction(OpCodeNumber.Ldarg_0);
writer.EmitInstruction(OpCodeNumber.Ldarg_1);
}
writer.EmitInstructionMethod(OpCodeNumber.Call, this.staticEqualsMethod);
if (negate)
{
writer.EmitInstruction(OpCodeNumber.Ldc_I4_0);
writer.EmitInstruction(OpCodeNumber.Ceq);
}
writer.EmitInstruction(OpCodeNumber.Ret);
writer.DetachInstructionSequence();
}
}
