/// <summary>
///
/// </summary>
/// <param name="tag"></param>
/// <param name="c"></param>
/// <param name="sourceType"></param>
/// <returns></returns>
public static MethodInfo EnumerableForeachCompile(CompileContext c, ForeachTag tag, Type sourceType)
{
var getVariableScope = DynamicHelpers.GetPropertyGetMethod(typeof(TemplateContext), "TempData");
var getVariableValue = typeof(VariableScope).GetMethod("get_Item", new[] { typeof(string) });
var stringBuilderType = typeof(StringBuilder);
var t = tag;
var type = c.GuessType(t);
var variableScopeType = typeof(VariableScope);
var templateContextType = typeof(TemplateContext);
var childType = TypeGuesser.InferChildType(sourceType);
var enumerableType = sourceType.GetInterface("IEnumerable`1");// typeof(System.Collections.IEnumerable);
Type enumeratorType;
bool mustTo = false;
if (enumerableType == null)
{
enumerableType = typeof(System.Collections.IEnumerable);
enumeratorType = typeof(System.Collections.IEnumerator);
mustTo = true;
}
else
{
enumeratorType = typeof(IEnumerator <>).MakeGenericType(childType);
}
if (childType.Length != 1)
{
throw new CompileException("[ForeachTag]:source error.");
}
var old = c.Data;
var scope = new VariableScope(old);
c.Data = scope;
c.Set(t.Name, childType[0]);
c.Set("foreachIndex", typeof(int));
var mb = c.CreateReutrnMethod <ForeachTag>(type);
var il = mb.GetILGenerator();
Label labelEnd = il.DefineLabel();
Label labelNext = il.DefineLabel();
Label labelStart = il.DefineLabel();
il.DeclareLocal(stringBuilderType);
il.DeclareLocal(enumerableType);
il.DeclareLocal(templateContextType);
il.DeclareLocal(typeof(bool));
il.DeclareLocal(enumeratorType);
il.DeclareLocal(typeof(Int32));
il.DeclareLocal(childType[0]);
il.DeclareLocal(typeof(bool));
il.DeclareLocal(typeof(string));
var types = new Type[t.Children.Count];
for (var i = 0; i < t.Children.Count; i++)
{
types[i] = c.GuessType(t.Children[i]);
if (t.Children[i] is SetTag setTag)
{
c.Set(setTag.Name, c.GuessType(setTag.Value));
}
if (types[i].FullName == "System.Void" || t.Children[i] is TextTag)
{
continue;
}
}
il.Emit(OpCodes.Nop);
il.Emit(OpCodes.Newobj, stringBuilderType.GetConstructor(Type.EmptyTypes));
il.Emit(OpCodes.Stloc_0);
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldarg_1);
var method = c.CompileTag(t.Source);
il.Emit(OpCodes.Call, method);
il.Emit(OpCodes.Stloc_1);
il.Emit(OpCodes.Ldloc_1);
il.Emit(OpCodes.Ldnull);
il.Emit(OpCodes.Cgt_Un);
il.Emit(OpCodes.Stloc_3);
il.Emit(OpCodes.Ldloc_3);
il.Emit(OpCodes.Brfalse, labelEnd);
il.Emit(OpCodes.Nop);
il.Emit(OpCodes.Ldloc_1);
il.Emit(OpCodes.Callvirt, DynamicHelpers.GetMethod(enumerableType, "GetEnumerator", Type.EmptyTypes));
il.Emit(OpCodes.Stloc_S, 4);
il.Emit(OpCodes.Ldarg_1);
il.Emit(OpCodes.Call, DynamicHelpers.GetMethod(templateContextType, "CreateContext", new Type[] { templateContextType }));
il.Emit(OpCodes.Stloc_2);
il.Emit(OpCodes.Ldc_I4, 0);
il.Emit(OpCodes.Stloc_S, 5);
il.Emit(OpCodes.Br, labelNext);
il.MarkLabel(labelStart);
il.Emit(OpCodes.Nop);
il.Emit(OpCodes.Ldloc_S, 5);
il.Emit(OpCodes.Ldc_I4, 1);
il.Emit(OpCodes.Add);
il.Emit(OpCodes.Stloc_S, 5);
il.Emit(OpCodes.Ldloc_S, 4);
il.Emit(OpCodes.Callvirt, DynamicHelpers.GetPropertyGetMethod(enumeratorType, "Current"));
if (mustTo)
{
if (childType[0].IsValueType)
{
il.Emit(OpCodes.Unbox_Any, childType[0]);
}
else
{
il.Emit(OpCodes.Isinst, childType[0]);
}
}
il.Emit(OpCodes.Stloc_S, 6);
il.Emit(OpCodes.Ldloc, 2);
il.Emit(OpCodes.Callvirt, getVariableScope);
il.Emit(OpCodes.Ldstr, t.Name);
il.Emit(OpCodes.Ldloc_S, 6);
il.Emit(OpCodes.Callvirt, DynamicHelpers.GetGenericMethod(variableScopeType, childType, "Set", new Type[] { typeof(string), childType[0] }));
il.Emit(OpCodes.Nop);
il.Emit(OpCodes.Ldloc, 2);
il.Emit(OpCodes.Callvirt, getVariableScope);
il.Emit(OpCodes.Ldstr, "foreachIndex");
il.Emit(OpCodes.Ldloc_S, 5);
il.Emit(OpCodes.Callvirt, DynamicHelpers.GetGenericMethod(variableScopeType, new Type[] { typeof(int) }, "Set", new Type[] { typeof(string), typeof(int) }));
il.Emit(OpCodes.Nop);
il.StringAppend(c, t.Children, 0, 2);
il.Emit(OpCodes.Nop);
il.MarkLabel(labelNext);
il.Emit(OpCodes.Ldloc_S, 4);
if (!mustTo)
{
il.Emit(OpCodes.Callvirt, DynamicHelpers.GetMethod(typeof(System.Collections.IEnumerator), "MoveNext", Type.EmptyTypes));
}
else
{
il.Emit(OpCodes.Callvirt, DynamicHelpers.GetMethod(enumeratorType, "MoveNext", Type.EmptyTypes));
}
il.Emit(OpCodes.Stloc_S, 7);
il.Emit(OpCodes.Ldloc_S, 7);
il.Emit(OpCodes.Brtrue, labelStart);
il.MarkLabel(labelEnd);
il.Emit(OpCodes.Ldloc_0);
il.Call(stringBuilderType, DynamicHelpers.GetMethod(typeof(object), "ToString", Type.EmptyTypes));
il.Emit(OpCodes.Stloc_S, 8);
il.Emit(OpCodes.Ldloc_S, 8);
il.Emit(OpCodes.Ret);
c.Data = old;
return(mb.GetBaseDefinition());
}
/// <summary>
///
/// </summary>
/// <param name="tag"></param>
/// <param name="c"></param>
/// <param name="sourceType"></param>
/// <returns></returns>
public static MethodInfo ArrayForeachCompile(CompileContext c, ForeachTag tag, Type sourceType)
{
var getVariableScope = DynamicHelpers.GetPropertyGetMethod(typeof(TemplateContext), "TempData");
var getVariableValue = typeof(VariableScope).GetMethod("get_Item", new[] { typeof(string) });
var stringBuilderType = typeof(StringBuilder);
var t = tag;
var type = c.GuessType(t);
var childType = TypeGuesser.InferChildType(sourceType);
var templateContextType = typeof(TemplateContext);
var variableScopeType = typeof(VariableScope);
if (childType.Length != 1)
{
throw new CompileException("[ForeachTag]:source error.");
}
var old = c.Data;
var scope = new VariableScope(old);
c.Data = scope;
c.Set(t.Name, childType[0]);
c.Set("foreachIndex", typeof(int));
var mb = c.CreateReutrnMethod <ForeachTag>(type);
var il = mb.GetILGenerator();
var labelNext = il.DefineLabel();
var labelStart = il.DefineLabel();
var labelEnd = il.DefineLabel();
il.DeclareLocal(stringBuilderType);
il.DeclareLocal(sourceType);
il.DeclareLocal(typeof(bool));
il.DeclareLocal(templateContextType);
il.DeclareLocal(typeof(int));
il.DeclareLocal(sourceType);
il.DeclareLocal(typeof(int));
il.DeclareLocal(childType[0]);
il.DeclareLocal(typeof(string));
var types = new Type[t.Children.Count];
for (var i = 0; i < t.Children.Count; i++)
{
types[i] = c.GuessType(t.Children[i]);
if (t.Children[i] is SetTag setTag)
{
c.Set(setTag.Name, c.GuessType(setTag.Value));
}
if (types[i].FullName == "System.Void" || t.Children[i] is TextTag)
{
continue;
}
il.DeclareLocal(types[i]);
}
il.Emit(OpCodes.Newobj, stringBuilderType.GetConstructor(Type.EmptyTypes));
il.Emit(OpCodes.Stloc, 0);
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldarg_1);
var method = c.CompileTag(t.Source);
il.Emit(OpCodes.Call, method);
il.Emit(OpCodes.Stloc_1);
il.Emit(OpCodes.Ldloc_1);
il.Emit(OpCodes.Ldnull);
il.Emit(OpCodes.Cgt_Un);
il.Emit(OpCodes.Stloc_2);
il.Emit(OpCodes.Ldloc_2);
il.Emit(OpCodes.Brfalse, labelEnd);
il.Emit(OpCodes.Ldarg_1);
il.Emit(OpCodes.Call, DynamicHelpers.GetMethod(templateContextType, "CreateContext", new Type[] { templateContextType }));
il.Emit(OpCodes.Stloc_3);
il.Emit(OpCodes.Ldc_I4_0);
il.Emit(OpCodes.Stloc, 4);
il.Emit(OpCodes.Ldloc_1);
il.Emit(OpCodes.Stloc, 5);
il.Emit(OpCodes.Ldc_I4_0);
il.Emit(OpCodes.Stloc, 6);
il.Emit(OpCodes.Br, labelStart);
// loop start
il.MarkLabel(labelNext);
il.Emit(OpCodes.Ldloc, 5);
il.Emit(OpCodes.Ldloc, 6);
il.Ldelem(childType[0]);
il.Emit(OpCodes.Stloc, 7);
il.Emit(OpCodes.Ldloc, 4);
il.Emit(OpCodes.Ldc_I4_1);
il.Emit(OpCodes.Add);
il.Emit(OpCodes.Stloc, 4);
il.Emit(OpCodes.Ldloc, 3);
il.Emit(OpCodes.Callvirt, getVariableScope);
il.Emit(OpCodes.Ldstr, t.Name);
il.Emit(OpCodes.Ldloc, 7);
il.Emit(OpCodes.Callvirt, DynamicHelpers.GetGenericMethod(variableScopeType, childType, "Set", new Type[] { typeof(string), childType[0] }));
il.Emit(OpCodes.Ldloc, 3);
il.Emit(OpCodes.Callvirt, getVariableScope);
il.Emit(OpCodes.Ldstr, "foreachIndex");
il.Emit(OpCodes.Ldloc, 4);
il.Emit(OpCodes.Callvirt, DynamicHelpers.GetGenericMethod(variableScopeType, new Type[] { typeof(int) }, "Set", new Type[] { typeof(string), typeof(int) }));
il.StringAppend(c, t.Children, 0, 3);
il.Emit(OpCodes.Ldloc, 6);
il.Emit(OpCodes.Ldc_I4_1);
il.Emit(OpCodes.Add);
il.Emit(OpCodes.Stloc, 6);
il.MarkLabel(labelStart);
il.Emit(OpCodes.Ldloc, 6);
il.Emit(OpCodes.Ldloc, 5);
il.Emit(OpCodes.Ldlen);
il.Emit(OpCodes.Conv_I4);
il.Emit(OpCodes.Blt, labelNext);
// end loop
il.MarkLabel(labelEnd);
il.Emit(OpCodes.Ldloc_0);
il.Call(stringBuilderType, DynamicHelpers.GetMethod(typeof(object), "ToString", Type.EmptyTypes));
il.Emit(OpCodes.Stloc, 8);
il.Emit(OpCodes.Ldloc, 8);
il.Emit(OpCodes.Ret);
return(mb.GetBaseDefinition());
}