/// <summary>
/// Get the value of a property on a type
/// </summary>
/// <typeparam name="TEmit"></typeparam>
/// <typeparam name="TType"></typeparam>
/// <param name="emitter"></param>
/// <param name="propertyName"></param>
public static void GetRuntimePropertyValue <TEmit, TType>(this OptimisingEmitter <TEmit> emitter, string propertyName)
{
// ReSharper disable once PossibleNullReferenceException
var method = typeof(TType).GetProperty(propertyName, BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public | BindingFlags.Static) !.GetMethod !;
using (var local = emitter.DeclareLocal(typeof(TType), "GetRuntimePropertyValue_Callee", false))
{
emitter.StoreLocal(local);
emitter.LoadLocalAddress(local, true);
emitter.Call(method);
}
}
/// <summary>
/// Emit code to dynamically check for errors. If an error would occur clear out the stack and jump away to the given label
/// </summary>
/// <typeparam name="TEmit"></typeparam>
/// <param name="emitter"></param>
/// <param name="errorLabel"></param>
/// <param name="parameters"></param>
public void EmitDynamicWillThrow <TEmit>(OptimisingEmitter <TEmit> emitter, Compiler.Emitter.Instructions.ExceptionBlock errorLabel, IReadOnlyList <Local> parameters)
{
// Load parameters back onto stack
for (var i = parameters.Count - 1; i >= 0; i--)
{
emitter.LoadLocal(parameters[i]);
}
// Invoke the `will throw` method to discover if this invocation would trigger a runtime error
emitter.Call(WillThrow);
// Create a label to jump past the error handling for the normal case
var noThrowLabel = emitter.DefineLabel();
// Jump past error handling if this is ok
emitter.BranchIfFalse(noThrowLabel);
// If execution reaches here it means an error would occur in this operation
emitter.Leave(errorLabel);
emitter.MarkLabel(noThrowLabel);
}
/// <summary>
/// Call a method on the `Runtime` class, taking a given set of arguments
/// </summary>
/// <typeparam name="TEmit"></typeparam>
/// <param name="emitter"></param>
/// <param name="methodName"></param>
/// <param name="args"></param>
public static void CallRuntimeN <TEmit>(this OptimisingEmitter <TEmit> emitter, string methodName, params Type[] args)
{
var method = typeof(Runtime).GetMethod(methodName, BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public | BindingFlags.Static, null, args, null) !;
emitter.Call(method);
}