static void EmitWriteToString(ILGenerator gen)
{
// Stack behavior: ..., (object)value => ..., (string)result
//System.Func<object, StringTemplate, object> write = ( value, self ) =>
//{
// StringWriter buf = new StringWriter();
// IStringTemplateWriter sw = self.Group.GetStringTemplateWriter( buf );
// int n = chunk.WriteAttribute( self, value, sw );
// if ( n > 0 )
// return buf.ToString();
// return value;
//};
var value = gen.DeclareLocal(typeof(object));
var buf = gen.DeclareLocal(typeof(StringWriter));
var sw = gen.DeclareLocal(typeof(IStringTemplateWriter));
var preserveValue = gen.DefineLabel();
var endOfWrite = gen.DefineLabel();
gen.Emit(OpCodes.Stloc, value);
gen.Emit(OpCodes.Newobj, typeof(StringWriter));
gen.Emit(OpCodes.Stloc, buf);
EmitLoadSelf(gen);
gen.Emit(OpCodes.Call, GetFuncMethodInfo(( StringTemplate self ) => self.Group));
gen.Emit(OpCodes.Ldloc, buf);
gen.Emit(OpCodes.Call, GetFuncMethodInfo((StringTemplateGroup group, System.IO.TextWriter writer) => group.GetStringTemplateWriter(writer)));
gen.Emit(OpCodes.Stloc, sw);
EmitLoadChunk(gen);
EmitLoadSelf(gen);
gen.Emit(OpCodes.Ldloc, value);
gen.Emit(OpCodes.Ldloc, sw);
gen.Emit(OpCodes.Call, GetFuncMethodInfo((ASTExpr chunk, StringTemplate self, object o, IStringTemplateWriter writer) => chunk.WriteAttribute(self, o, writer)));
gen.Emit(OpCodes.Ldc_I4_0);
gen.Emit(OpCodes.Ble, preserveValue);
gen.Emit(OpCodes.Ldloc, buf);
gen.Emit(OpCodes.Call, GetFuncMethodInfo(( StringWriter writer ) => writer.ToString()));
gen.Emit(OpCodes.Br_S, endOfWrite);
gen.MarkLabel(preserveValue);
gen.Emit(OpCodes.Ldloc, value);
gen.MarkLabel(endOfWrite);
}
