void AnalyzeExpression(AstNode expression, AstNode body, AstNodeCollection <ParameterDeclaration> parameters)
{
var invocation = AnalyzeBody(body);
if (invocation == null)
{
return;
}
if (!IsSimpleTarget(invocation.Target))
{
return;
}
var lambdaParameters = parameters.ToList();
if (lambdaParameters.Count != invocation.Arguments.Count)
{
return;
}
int i = 0;
foreach (var param in invocation.Arguments)
{
var id = param as IdentifierExpression;
if (id == null)
{
return;
}
if (lambdaParameters[i].Name != id.Identifier)
{
return;
}
i++;
}
AddIssue(expression, ctx.TranslateString("Expression can be reduced to delegate"), script => {
var validTypes = CreateFieldAction.GetValidTypes(ctx.Resolver, expression).ToList();
if (validTypes.Any(t => t.FullName == "System.Func" && t.TypeParameterCount == 1 + parameters.Count) && validTypes.Any(t => t.FullName == "System.Action"))
{
var rr = ctx.Resolve(invocation) as CSharpInvocationResolveResult;
if (rr != null && rr.Member.ReturnType.Kind != ICSharpCode.NRefactory.TypeSystem.TypeKind.Void)
{
var builder = ctx.CreateTypeSytemAstBuilder(expression);
var type = builder.ConvertType(new TopLevelTypeName("System", "Func", 1));
var args = type is SimpleType ? ((SimpleType)type).TypeArguments : ((MemberType)type).TypeArguments;
args.Clear();
foreach (var pde in parameters)
{
args.Add(builder.ConvertType(ctx.Resolve(pde).Type));
}
args.Add(builder.ConvertType(rr.Member.ReturnType));
script.Replace(expression, new CastExpression(type, invocation.Target.Clone()));
return;
}
}
script.Replace(expression, invocation.Target.Clone());
});
}
void AnalyzeExpression(AstNode expression, AstNode body, AstNodeCollection <ParameterDeclaration> parameters)
{
var invocation = AnalyzeBody(body);
if (invocation == null)
{
return;
}
if (!IsSimpleTarget(invocation.Target))
{
return;
}
var rr = ctx.Resolve(invocation) as CSharpInvocationResolveResult;
if (rr == null)
{
return;
}
var lambdaParameters = parameters.ToList();
var arguments = rr.GetArgumentsForCall();
if (lambdaParameters.Count != arguments.Count)
{
return;
}
for (int i = 0; i < arguments.Count; i++)
{
var arg = UnpackImplicitIdentityOrReferenceConversion(arguments[i]) as LocalResolveResult;
if (arg == null || arg.Variable.Name != lambdaParameters[i].Name)
{
return;
}
}
var returnConv = ctx.GetConversion(invocation);
if (returnConv.IsExplicit || !(returnConv.IsIdentityConversion || returnConv.IsReferenceConversion))
{
return;
}
AddIssue(expression, ctx.TranslateString("Expression can be reduced to delegate"), script => {
var validTypes = CreateFieldAction.GetValidTypes(ctx.Resolver, expression).ToList();
if (validTypes.Any(t => t.FullName == "System.Func" && t.TypeParameterCount == 1 + parameters.Count) && validTypes.Any(t => t.FullName == "System.Action"))
{
if (rr != null && rr.Member.ReturnType.Kind != TypeKind.Void)
{
var builder = ctx.CreateTypeSystemAstBuilder(expression);
var type = builder.ConvertType(new TopLevelTypeName("System", "Func", 1));
var args = type.GetChildrenByRole(Roles.TypeArgument);
args.Clear();
foreach (var pde in parameters)
{
args.Add(builder.ConvertType(ctx.Resolve(pde).Type));
}
args.Add(builder.ConvertType(rr.Member.ReturnType));
script.Replace(expression, new CastExpression(type, invocation.Target.Clone()));
return;
}
}
script.Replace(expression, invocation.Target.Clone());
});
}