// Copyright (c) Microsoft Corporation. All rights reserved.

// Licensed under the MIT license.

<#@ template debug="false" hostspecific="false" language="C#" #>

<#@ output extension=".Generated.cs" #>

<#@ assembly name="System.Core" #>

<#@ import namespace="System.Linq" #>

<# const int maxArgCount = 16; #>

using System;

using System.Reflection;

using System.Diagnostics.CodeAnalysis;

namespace Microsoft.ClearScript

{

internal static partial class DelegateFactory

{

private const int maxArgCount = <#= maxArgCount #>;

<#

for (var count = 0; count <= maxArgCount; count++)

{

var typeParamList = (count == 0) ? "<TDelegate>" : "<" + string.Join(", ", Enumerable.Range(1, count).Select(index => "T" + index)) + ", TDelegate>";

var allByValueExpr = (count == 0) ? "true" : "GetAllByValue(" + string.Join(", ", Enumerable.Range(1, count).Select(index => "typeof(T" + index + ")")) + ")";

var methodParamList = string.Join(", ", Enumerable.Range(1, count).Select(index => "T" + index + " a" + index));

var argList = string.Join(", ", Enumerable.Range(1, count).Select(index => "a" + index));

var varDeclList = string.Join("\r\n ", Enumerable.Range(1, count).Select(index => "var v" + index + " = GetArgValue(a" + index + ");"));

var byRefArgList = string.Join(", ", Enumerable.Range(1, count).Select(index => "ref v" + index));

var varAssignList = string.Join("\r\n ", Enumerable.Range(1, count).Select(index => "SetArgValue(a" + index + ", v" + index + ");"));

#>

[ExcludeFromCodeCoverage]

private sealed class ProcShim<#= typeParamList #> : ProcShim

{

private static readonly MethodInfo method = typeof(ProcShim<#= typeParamList #>).GetMethod("InvokeTarget");

private static readonly bool allByValue = <#= allByValueExpr #>;

private readonly object target;

private readonly Delegate del;

public ProcShim(ScriptEngine engine, object target)

: base(engine)

{

this.target = GetCompatibleTarget(typeof(TDelegate), target);

del = Delegate.CreateDelegate(typeof(TDelegate), this, method);

}

// ReSharper disable UnusedMember.Local

public void InvokeTarget(<#= methodParamList #>)

{

if (allByValue || Engine.EnableAutoHostVariables)

{

if (target is ScriptObject scriptObject)

{

Invoke(() => scriptObject.InvokeAsFunction(<#= argList #>));

}

else

{

Invoke(() => ((dynamic)target)(<#= argList #>));

}

}

else

{

<#= varDeclList #>

try

{

Invoke(() => ((dynamic)target)(<#= byRefArgList #>));

}

finally

{

<#= varAssignList #>

}

}

}

// ReSharper restore UnusedMember.Local

#region DelegateShim overrides

public override Delegate Delegate

{

get { return del; }

}

#endregion

}

<#

}

#>

<#

for (var count = 0; count <= maxArgCount; count++)

{

var typeParamList = (count == 0) ? "<TResult, TDelegate>" : "<" + string.Join(", ", Enumerable.Range(1, count).Select(index => "T" + index)) + ", TResult, TDelegate>";

var allByValueExpr = (count == 0) ? "true" : "GetAllByValue(" + string.Join(", ", Enumerable.Range(1, count).Select(index => "typeof(T" + index + ")")) + ")";

var methodParamList = string.Join(", ", Enumerable.Range(1, count).Select(index => "T" + index + " a" + index));

var argList = string.Join(", ", Enumerable.Range(1, count).Select(index => "a" + index));

var varDeclList = string.Join("\r\n ", Enumerable.Range(1, count).Select(index => "var v" + index + " = GetArgValue(a" + index + ");"));

var byRefArgList = string.Join(", ", Enumerable.Range(1, count).Select(index => "ref v" + index));

var varAssignList = string.Join("\r\n ", Enumerable.Range(1, count).Select(index => "SetArgValue(a" + index + ", v" + index + ");"));

#>

[ExcludeFromCodeCoverage]

private sealed class FuncShim<#= typeParamList #> : FuncShim<TResult>

{

private static readonly MethodInfo method = typeof(FuncShim<#= typeParamList #>).GetMethod("InvokeTarget");

private static readonly bool allByValue = <#= allByValueExpr #>;

private readonly object target;

private readonly Delegate del;

public FuncShim(ScriptEngine engine, object target)

: base(engine)

{

this.target = GetCompatibleTarget(typeof(TDelegate), target);

del = Delegate.CreateDelegate(typeof(TDelegate), this, method);

}

// ReSharper disable UnusedMember.Local

public TResult InvokeTarget(<#= methodParamList #>)

{

if (allByValue || Engine.EnableAutoHostVariables)

{

if (target is ScriptObject scriptObject)

{

return Invoke(() => (TResult)scriptObject.InvokeAsFunction(<#= argList #>));

}

return Invoke(() => (TResult)((dynamic)target)(<#= argList #>));

}

<#= varDeclList #>

try

{

return Invoke(() => (TResult)((dynamic)target)(<#= byRefArgList #>));

}

finally

{

<#= varAssignList #>

}

}

// ReSharper restore UnusedMember.Local

#region DelegateShim overrides

public override Delegate Delegate

{

get { return del; }

}

#endregion

}

<#

}

#>

private static readonly Type[] procTemplates =

{

<#

for (var count = 0; count <= maxArgCount; count++)

{

var typeArgList = (count == 0) ? "" : "<" + string.Join(", ", Enumerable.Range(1, count).Select(index => "/*T" + index + "*/")) + ">";

#>

typeof(Action<#= typeArgList #>),

<#

}

#>

};

private static readonly Type[] funcTemplates =

{

<#

for (var count = 0; count <= maxArgCount; count++)

{

var typeArgList = (count == 0) ? "</*TResult*/>" : "<" + string.Join(", ", Enumerable.Range(1, count).Select(index => "/*T" + index + "*/")) + ", /*TResult*/>";

#>

typeof(Func<#= typeArgList #>),

<#

}

#>

};

private static readonly Type[] procShimTemplates =

{

<#

for (var count = 0; count <= maxArgCount; count++)

{

var typeArgList = (count == 0) ? "</*TDelegate*/>" : "<" + string.Join(", ", Enumerable.Range(1, count).Select(index => "/*T" + index + "*/")) + ", /*TDelegate*/>";

#>

typeof(ProcShim<#= typeArgList #>),

<#

}

#>

};

private static readonly Type[] funcShimTemplates =

{

<#

for (var count = 0; count <= maxArgCount; count++)

{

var typeArgList = (count == 0) ? "</*TResult*/, /*TDelegate*/>" : "<" + string.Join(", ", Enumerable.Range(1, count).Select(index => "/*T" + index + "*/")) + ", /*TResult*/, /*TDelegate*/>";

#>

typeof(FuncShim<#= typeArgList #>),

<#

}

#>

};

}

}