// #Regression #TypeInference 
// Regression test for FSHARP1.0:4758, FSHARP1.0:5461
// Type Inference
// Check Method Disambiguation When User Generic Variable Get Instantiated By Overload Resolution
namespace N
// These different return types are used to determine which overload got chosen
type One = | One
type Two = | Two
type Three = | Three
type Four = | Four

// An unsealed type
type C() = 
    member x.P = 1
    
type C1 =
    static member M<'a>(x:'a,y:'a) = One

type C2 =
    static member M<'a,'b>(x:'a,y:'b) = Two

type C3 =    
    static member M<'a>(x:'a,y:int) = Three

type C4 =    
    static member M<'a>(x:'a,y:C) = Four

type C12 =
    static member M<'a>(x:'a,y:'a) = One
    static member M<'a,'b>(x:'a,y:'b) = Two

type C23 =
    static member M<'a,'b>(x:'a,y:'b) = Two
    static member M<'a>(x:'a,y:int) = Three

type C13 =
    static member M<'a>(x:'a,y:'a) = One
    static member M<'a>(x:'a,y:int) = Three

type C14 =
    static member M<'a>(x:'a,y:'a) = One
    static member M<'a>(x:'a,y:C) = Four

type C24 =
    static member M<'a,'b>(x:'a,y:'b) = Two
    static member M<'a>(x:'a,y:C) = Four

type C123 =
    static member M<'a>(x:'a,y:'a) = One
    static member M<'a,'b>(x:'a,y:'b) = Two
    static member M<'a>(x:'a,y:int) = Three

type C1234 =
    static member M<'a>(x:'a,y:'a) = One
    static member M<'a,'b>(x:'a,y:'b) = Two
    static member M<'a>(x:'a,y:int) = Three
    static member M<'a>(x:'a,y:C) = Four


module M0Rec =
    let rec    gB2<'a,'b> (x:'a) (y:'b) = C2.M(x,y)  = Two     // expect: ok
    let rec   gB12<'a,'b> (x:'a) (y:'b) = C12.M(x,y) = Two     // expect: ok
    let rec   gB23<'a,'b> (x:'a) (y:'b) = C23.M(x,y) = Two     // expect: ok
    let rec   gB24<'a,'b> (x:'a) (y:'b) = C24.M(x,y) = Two     // expect: ok
    let rec  gB123<'a,'b> (x:'a) (y:'b) = C123.M(x,y) = Two    // expect: ok
    let rec gB1234<'a,'b> (x:'a) (y:'b) = C123.M(x,y) = Two    // expect: ok
    let rec    gC2<'a,'b> (x:'a) (y:'b) = C2.M<'a,'b>(x,y)  = Two  // expect: ok
    let rec   gC12<'a,'b> (x:'a) (y:'b) = C12.M<'a,'b>(x,y) = Two  // expect: ok
    let rec   gC23<'a,'b> (x:'a) (y:'b) = C23.M<'a,'b>(x,y) = Two  // expect: ok
    let rec  gC123<'a,'b> (x:'a) (y:'b) = C123.M<'a,'b>(x,y) = Two // expect: ok
    let rec gC1234<'a,'b> (x:'a) (y:'b) = C123.M<'a,'b>(x,y) = Two // expect: ok
    let rec    gD2<'a,'b> (x:'a) (y:'b) = C2.M<_,_>(x,y)  = Two    // expect: ok

    let rec   gD12<'a,'b> (x:'a) (y:'b) = C12.M<_,_>(x,y) = Two    // expect: ok
    let rec   gD23<'a,'b> (x:'a) (y:'b) = C23.M<_,_>(x,y) = Two    // expect: ok
    let rec  gD123<'a,'b> (x:'a) (y:'b) = C123.M<_,_>(x,y) = Two   // expect: ok
    let rec gD1234<'a,'b> (x:'a) (y:'b) = C123.M<_,_>(x,y) = Two   // expect: ok
