/// <summary>
/// Binds expression to concrete types and compiles it afterward.
/// </summary>
/// <typeparam name="Arg1T">First argument type.</typeparam>
/// <typeparam name="Arg2T">Second argument type.</typeparam>
/// <typeparam name="Arg3T">Third argument type.</typeparam>
/// <typeparam name="Arg4T">Fourth argument type.</typeparam>
/// <typeparam name="ResultT">Result type.</typeparam>
/// <param name="arg1Name">First argument name or <see cref="CSharpExpression.ARG1_DEFAULT_NAME"/> if not specified.</param>
/// <param name="arg2Name">Second argument name or <see cref="CSharpExpression.ARG2_DEFAULT_NAME"/> if not specified.</param>
/// <param name="arg3Name">Third argument name or <see cref="CSharpExpression.ARG3_DEFAULT_NAME"/> if not specified.</param>
/// <param name="arg4Name">Fourth argument name or <see cref="CSharpExpression.ARG4_DEFAULT_NAME"/> if not specified.</param>
/// <returns>Bound and compiled into <see cref="Func{Arg1T, Arg2T, Arg3T, Arg4T, ResultT}"/> expression.</returns>
public Func <Arg1T, Arg2T, Arg3T, Arg4T, ResultT> Bind <Arg1T, Arg2T, Arg3T, Arg4T, ResultT>(string arg1Name = null, string arg2Name = null, string arg3Name = null, string arg4Name = null)
{
var key = new MethodCallSignature
(
typeof(Arg1T),
arg1Name ?? CSharpExpression.ARG1_DEFAULT_NAME, typeof(Arg2T),
arg2Name ?? CSharpExpression.ARG2_DEFAULT_NAME, typeof(Arg3T),
arg3Name ?? CSharpExpression.ARG3_DEFAULT_NAME, typeof(Arg4T),
arg4Name ?? CSharpExpression.ARG4_DEFAULT_NAME, typeof(ResultT)
);
var expression = default(Expression);
lock (this.compiledExpressions)
{
if (!this.compiledExpressions.TryGetValue(key, out expression))
{
var parameters = CreateParameters
(
new[] { typeof(Arg1T), typeof(Arg2T), typeof(Arg3T), typeof(Arg4T) },
new[]
{
arg1Name ?? CSharpExpression.ARG1_DEFAULT_NAME,
arg2Name ?? CSharpExpression.ARG2_DEFAULT_NAME,
arg3Name ?? CSharpExpression.ARG3_DEFAULT_NAME,
arg4Name ?? CSharpExpression.ARG4_DEFAULT_NAME
}
);
var builder = new Binder(parameters, resultType: typeof(ResultT));
expression = builder.Bind(this.SyntaxTree);
this.compiledExpressions.Add(key, expression);
}
}
return(((Expression <Func <Arg1T, Arg2T, Arg3T, Arg4T, ResultT> >)expression).CompileAot());
}
private static InvokeOperation TryCreateInstanceMethod(MethodInfo method)
{
if (method.DeclaringType == null)
{
return(null);
}
// try get from cache
var invoker = default(InvokeOperation);
lock (InstanceMethods)
if (InstanceMethods.TryGetValue(method, out invoker))
{
return(invoker);
}
var creatorsByParamsCount = default(Dictionary <MethodCallSignature, InvokeOperationCreator>[]);
lock (InstanceMethodCreators)
if (InstanceMethodCreators.TryGetValue(method.DeclaringType, out creatorsByParamsCount) == false || creatorsByParamsCount == null)
{
goto cacheAndReturn;
}
var methodCallSignature = new MethodCallSignature(method);
if (creatorsByParamsCount.Length < methodCallSignature.Count || creatorsByParamsCount[methodCallSignature.Count] == null)
{
goto cacheAndReturn;
}
var creatorsBySignature = creatorsByParamsCount[methodCallSignature.Count];
var creator = default(InvokeOperationCreator);
lock (creatorsBySignature)
if (creatorsBySignature.TryGetValue(methodCallSignature, out creator) == false || creator == null)
{
goto cacheAndReturn;
}
invoker = creator(method, method.GetParameters());
cacheAndReturn:
// cache it
lock (InstanceMethods)
InstanceMethods[method] = invoker;
return(invoker);
}
public Func <Arg1T, Arg2T, Arg3T, ResultT> Bind <Arg1T, Arg2T, Arg3T, ResultT>(string arg1Name = null, string arg2Name = null, string arg3Name = null)
{
var key = new MethodCallSignature(typeof(Arg1T), arg1Name ?? "arg1", typeof(Arg2T), arg2Name ?? "arg2", typeof(Arg3T), arg3Name ?? "arg3", typeof(ResultT));
var expression = default(Expression);
lock (this.compiledExpressions)
{
if (!this.compiledExpressions.TryGetValue(key, out expression))
{
var parameters = CreateParameters(new[] { typeof(Arg1T), typeof(Arg2T), typeof(Arg3T) }, new[] { arg1Name ?? "arg1", arg2Name ?? "arg2", arg3Name ?? "arg3" });
var builder = new ExpressionBuilder(parameters, resultType: typeof(ResultT));
expression = Expression.Lambda <Func <Arg1T, Arg2T, Arg3T, ResultT> >(builder.Build(this.ExpressionTree), parameters);
this.compiledExpressions.Add(key, expression);
}
}
return(((Expression <Func <Arg1T, Arg2T, Arg3T, ResultT> >)expression).CompileAot());
}
/// <summary>
/// Binds expression to concrete types and compiles it afterward.
/// </summary>
/// <typeparam name="ResultT">Result type.</typeparam>
/// <returns>Bound and compiled into <see cref="Func{ResultT}"/> expression.</returns>
public Func <ResultT> Bind <ResultT>()
{
var key = new MethodCallSignature(typeof(ResultT));
var expression = default(Expression);
lock (this.compiledExpressions)
{
if (!this.compiledExpressions.TryGetValue(key, out expression))
{
var parameters = new ReadOnlyCollection <ParameterExpression>(new ParameterExpression[0]);
var builder = new Binder(parameters, resultType: typeof(ResultT));
expression = builder.Bind(this.SyntaxTree);
this.compiledExpressions.Add(key, expression);
}
}
return(((Expression <Func <ResultT> >)expression).CompileAot());
}
public static void RegisterInstanceMethod <InstanceT, ResultT>()
{
const int PARAMS_INDEX = 0;
var creatorsByParamsCount = default(Dictionary <MethodCallSignature, InvokeOperationCreator>[]);
lock (InstanceMethodCreators)
if (InstanceMethodCreators.TryGetValue(typeof(InstanceT), out creatorsByParamsCount) == false)
{
InstanceMethodCreators[typeof(InstanceT)] = creatorsByParamsCount = new Dictionary <MethodCallSignature, InvokeOperationCreator> [4];
}
var creatorsBySignature = creatorsByParamsCount[PARAMS_INDEX];
if (creatorsBySignature == null)
{
creatorsByParamsCount[PARAMS_INDEX] = creatorsBySignature = new Dictionary <MethodCallSignature, InvokeOperationCreator>();
}
var methodCallSignature = new MethodCallSignature(typeof(ResultT));
lock (creatorsBySignature)
creatorsBySignature[methodCallSignature] = new InvokeOperationCreator(TryCreate <InstanceT, ResultT>);
}
