expr3.go

     1  // Copyright 2012 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package expr3
     6  
     7  import "time"
     8  
     9  func indexes() {
    10  	_ = 1 /* ERROR "cannot index" */ [0]
    11  	_ = indexes /* ERROR "cannot index" */ [0]
    12  	_ = ( /* ERROR "cannot slice" */ 12 + 3)[1:2]
    13  
    14  	var a [10]int
    15  	_ = a[true /* ERROR "cannot convert" */ ]
    16  	_ = a["foo" /* ERROR "cannot convert" */ ]
    17  	_ = a[1.1 /* ERROR "truncated" */ ]
    18  	_ = a[1.0]
    19  	_ = a[- /* ERROR "negative" */ 1]
    20  	_ = a[- /* ERROR "negative" */ 1 :]
    21  	_ = a[: - /* ERROR "negative" */ 1]
    22  	_ = a[: /* ERROR "middle index required" */ : /* ERROR "final index required" */ ]
    23  	_ = a[0: /* ERROR "middle index required" */ : /* ERROR "final index required" */ ]
    24  	_ = a[0: /* ERROR "middle index required" */ :10]
    25  	_ = a[:10:10]
    26  
    27  	var a0 int
    28  	a0 = a[0]
    29  	_ = a0
    30  	var a1 int32
    31  	a1 = a /* ERRORx `cannot use .* in assignment` */ [1]
    32  	_ = a1
    33  
    34  	_ = a[9]
    35  	_ = a[10 /* ERRORx `index .* out of bounds` */ ]
    36  	_ = a[1 /* ERROR "overflows" */ <<100]
    37  	_ = a[1<< /* ERROR "constant shift overflow" */ 1000] // no out-of-bounds follow-on error
    38  	_ = a[10:]
    39  	_ = a[:10]
    40  	_ = a[10:10]
    41  	_ = a[11 /* ERRORx `index .* out of bounds` */ :]
    42  	_ = a[: 11 /* ERRORx `index .* out of bounds` */ ]
    43  	_ = a[: 1 /* ERROR "overflows" */ <<100]
    44  	_ = a[:10:10]
    45  	_ = a[:11 /* ERRORx `index .* out of bounds` */ :10]
    46  	_ = a[:10:11 /* ERRORx `index .* out of bounds` */ ]
    47  	_ = a[10:0 /* ERROR "invalid slice indices" */ :10]
    48  	_ = a[0:10:0 /* ERROR "invalid slice indices" */ ]
    49  	_ = a[10:0 /* ERROR "invalid slice indices" */:0]
    50  	_ = &a /* ERROR "cannot take address" */ [:10]
    51  
    52  	pa := &a
    53  	_ = pa[9]
    54  	_ = pa[10 /* ERRORx `index .* out of bounds` */ ]
    55  	_ = pa[1 /* ERROR "overflows" */ <<100]
    56  	_ = pa[10:]
    57  	_ = pa[:10]
    58  	_ = pa[10:10]
    59  	_ = pa[11 /* ERRORx `index .* out of bounds` */ :]
    60  	_ = pa[: 11 /* ERRORx `index .* out of bounds` */ ]
    61  	_ = pa[: 1 /* ERROR "overflows" */ <<100]
    62  	_ = pa[:10:10]
    63  	_ = pa[:11 /* ERRORx `index .* out of bounds` */ :10]
    64  	_ = pa[:10:11 /* ERRORx `index .* out of bounds` */ ]
    65  	_ = pa[10:0 /* ERROR "invalid slice indices" */ :10]
    66  	_ = pa[0:10:0 /* ERROR "invalid slice indices" */ ]
    67  	_ = pa[10:0 /* ERROR "invalid slice indices" */ :0]
    68  	_ = &pa /* ERROR "cannot take address" */ [:10]
    69  
    70  	var b [0]int
    71  	_ = b[0 /* ERRORx `index .* out of bounds` */ ]
    72  	_ = b[:]
    73  	_ = b[0:]
    74  	_ = b[:0]
    75  	_ = b[0:0]
    76  	_ = b[0:0:0]
    77  	_ = b[1 /* ERRORx `index .* out of bounds` */ :0:0]
    78  
    79  	var s []int
    80  	_ = s[- /* ERROR "negative" */ 1]
    81  	_ = s[- /* ERROR "negative" */ 1 :]
    82  	_ = s[: - /* ERROR "negative" */ 1]
    83  	_ = s[0]
    84  	_ = s[1:2]
    85  	_ = s[2:1 /* ERROR "invalid slice indices" */ ]
    86  	_ = s[2:]
    87  	_ = s[: 1 /* ERROR "overflows" */ <<100]
    88  	_ = s[1 /* ERROR "overflows" */ <<100 :]
    89  	_ = s[1 /* ERROR "overflows" */ <<100 : 1 /* ERROR "overflows" */ <<100]
    90  	_ = s[: /* ERROR "middle index required" */ :  /* ERROR "final index required" */ ]
    91  	_ = s[:10:10]
    92  	_ = s[10:0 /* ERROR "invalid slice indices" */ :10]
    93  	_ = s[0:10:0 /* ERROR "invalid slice indices" */ ]
    94  	_ = s[10:0 /* ERROR "invalid slice indices" */ :0]
    95  	_ = &s /* ERROR "cannot take address" */ [:10]
    96  
    97  	var m map[string]int
    98  	_ = m[0 /* ERRORx `cannot use .* in map index` */ ]
    99  	_ = m /* ERROR "cannot slice" */ ["foo" : "bar"]
   100  	_ = m["foo"]
   101  	// ok is of type bool
   102  	type mybool bool
   103  	var ok mybool
   104  	_, ok = m["bar"]
   105  	_ = ok
   106  	_ = m/* ERROR "mismatched types int and untyped string" */[0 /* ERROR "cannot use 0" */ ] + "foo"
   107  
   108  	var t string
   109  	_ = t[- /* ERROR "negative" */ 1]
   110  	_ = t[- /* ERROR "negative" */ 1 :]
   111  	_ = t[: - /* ERROR "negative" */ 1]
   112  	_ = t[1:2:3 /* ERROR "3-index slice of string" */ ]
   113  	_ = "foo"[1:2:3 /* ERROR "3-index slice of string" */ ]
   114  	var t0 byte
   115  	t0 = t[0]
   116  	_ = t0
   117  	var t1 rune
   118  	t1 = t /* ERRORx `cannot use .* in assignment` */ [2]
   119  	_ = t1
   120  	_ = ("foo" + "bar")[5]
   121  	_ = ("foo" + "bar")[6 /* ERRORx `index .* out of bounds` */ ]
   122  
   123  	const c = "foo"
   124  	_ = c[- /* ERROR "negative" */ 1]
   125  	_ = c[- /* ERROR "negative" */ 1 :]
   126  	_ = c[: - /* ERROR "negative" */ 1]
   127  	var c0 byte
   128  	c0 = c[0]
   129  	_ = c0
   130  	var c2 float32
   131  	c2 = c /* ERRORx `cannot use .* in assignment` */ [2]
   132  	_ = c[3 /* ERRORx `index .* out of bounds` */ ]
   133  	_ = ""[0 /* ERRORx `index .* out of bounds` */ ]
   134  	_ = c2
   135  
   136  	_ = s[1<<30] // no compile-time error here
   137  
   138  	// issue 4913
   139  	type mystring string
   140  	var ss string
   141  	var ms mystring
   142  	var i, j int
   143  	ss = "foo"[1:2]
   144  	ss = "foo"[i:j]
   145  	ms = "foo" /* ERRORx `cannot use .* in assignment` */ [1:2]
   146  	ms = "foo" /* ERRORx `cannot use .* in assignment` */ [i:j]
   147  	_, _ = ss, ms
   148  }
   149  
   150  type T struct {
   151  	x int
   152  	y func()
   153  }
   154  
   155  func (*T) m() {}
   156  
   157  func method_expressions() {
   158  	_ = T.a /* ERROR "no field or method" */
   159  	_ = T.x /* ERROR "has no method" */
   160  	_ = T.m /* ERROR "invalid method expression T.m (needs pointer receiver (*T).m)" */
   161  	_ = (*T).m
   162  
   163  	var f func(*T) = T.m /* ERROR "invalid method expression T.m (needs pointer receiver (*T).m)" */
   164  	var g func(*T) = (*T).m
   165  	_, _ = f, g
   166  
   167  	_ = T.y /* ERROR "has no method" */
   168  	_ = (*T).y /* ERROR "has no method" */
   169  }
   170  
   171  func struct_literals() {
   172  	type T0 struct {
   173  		a, b, c int
   174  	}
   175  
   176  	type T1 struct {
   177  		T0
   178  		a, b int
   179  		u float64
   180  		s string
   181  	}
   182  
   183  	// keyed elements
   184  	_ = T1{}
   185  	_ = T1{a: 0, 1 /* ERRORx `mixture of .* elements` */ }
   186  	_ = T1{aa /* ERROR "unknown field" */ : 0}
   187  	_ = T1{1 /* ERROR "invalid field name" */ : 0}
   188  	_ = T1{a: 0, s: "foo", u: 0, a /* ERROR "duplicate field" */: 10}
   189  	_ = T1{a: "foo" /* ERRORx `cannot use .* in struct literal` */ }
   190  	_ = T1{c /* ERROR "unknown field" */ : 0}
   191  	_ = T1{T0: { /* ERROR "missing type" */ }} // struct literal element type may not be elided
   192  	_ = T1{T0: T0{}}
   193  	_ = T1{T0 /* ERROR "invalid field name" */ .a: 0}
   194  
   195  	// unkeyed elements
   196  	_ = T0{1, 2, 3}
   197  	_ = T0{1, b /* ERROR "mixture" */ : 2, 3}
   198  	_ = T0{1, 2} /* ERROR "too few values" */
   199  	_ = T0{1, 2, 3, 4  /* ERROR "too many values" */ }
   200  	_ = T0{1, "foo" /* ERRORx `cannot use .* in struct literal` */, 3.4  /* ERRORx `cannot use .*\(truncated\)` */}
   201  
   202  	// invalid type
   203  	type P *struct{
   204  		x int
   205  	}
   206  	_ = P /* ERROR "invalid composite literal type" */ {}
   207  
   208  	// unexported fields
   209  	_ = time.Time{}
   210  	_ = time.Time{sec /* ERROR "unknown field" */ : 0}
   211  	_ = time.Time{
   212  		0 /* ERROR "implicit assignment to unexported field wall in struct literal" */,
   213  		0 /* ERROR "implicit assignment" */ ,
   214  		nil /* ERROR "implicit assignment" */ ,
   215  	}
   216  }
   217  
   218  func array_literals() {
   219  	type A0 [0]int
   220  	_ = A0{}
   221  	_ = A0{0 /* ERRORx `index .* out of bounds` */}
   222  	_ = A0{0 /* ERRORx `index .* out of bounds` */ : 0}
   223  
   224  	type A1 [10]int
   225  	_ = A1{}
   226  	_ = A1{0, 1, 2}
   227  	_ = A1{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
   228  	_ = A1{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 /* ERRORx `index .* out of bounds` */ }
   229  	_ = A1{- /* ERROR "negative" */ 1: 0}
   230  	_ = A1{8: 8, 9}
   231  	_ = A1{8: 8, 9, 10 /* ERRORx `index .* out of bounds` */ }
   232  	_ = A1{0, 1, 2, 0 /* ERROR "duplicate index" */ : 0, 3: 3, 4}
   233  	_ = A1{5: 5, 6, 7, 3: 3, 4}
   234  	_ = A1{5: 5, 6, 7, 3: 3, 4, 5 /* ERROR "duplicate index" */ }
   235  	_ = A1{10 /* ERRORx `index .* out of bounds` */ : 10, 10 /* ERRORx `index .* out of bounds` */ : 10}
   236  	_ = A1{5: 5, 6, 7, 3: 3, 1 /* ERROR "overflows" */ <<100: 4, 5 /* ERROR "duplicate index" */ }
   237  	_ = A1{5: 5, 6, 7, 4: 4, 1 /* ERROR "overflows" */ <<100: 4}
   238  	_ = A1{2.0}
   239  	_ = A1{2.1 /* ERROR "truncated" */ }
   240  	_ = A1{"foo" /* ERRORx `cannot use .* in array or slice literal` */ }
   241  
   242  	// indices must be integer constants
   243  	i := 1
   244  	const f = 2.1
   245  	const s = "foo"
   246  	_ = A1{i /* ERROR "index i must be integer constant" */ : 0}
   247  	_ = A1{f /* ERROR "truncated" */ : 0}
   248  	_ = A1{s /* ERROR "cannot convert" */ : 0}
   249  
   250  	a0 := [...]int{}
   251  	assert(len(a0) == 0)
   252  
   253  	a1 := [...]int{0, 1, 2}
   254  	assert(len(a1) == 3)
   255  	var a13 [3]int
   256  	var a14 [4]int
   257  	a13 = a1
   258  	a14 = a1 /* ERRORx `cannot use .* in assignment` */
   259  	_, _ = a13, a14
   260  
   261  	a2 := [...]int{- /* ERROR "negative" */ 1: 0}
   262  	_ = a2
   263  
   264  	a3 := [...]int{0, 1, 2, 0 /* ERROR "duplicate index" */ : 0, 3: 3, 4}
   265  	assert(len(a3) == 5) // somewhat arbitrary
   266  
   267  	a4 := [...]complex128{0, 1, 2, 1<<10-2: -1i, 1i, 400: 10, 12, 14}
   268  	assert(len(a4) == 1024)
   269  
   270  	// composite literal element types may be elided
   271  	type T []int
   272  	_ = [10]T{T{}, {}, 5: T{1, 2, 3}, 7: {1, 2, 3}}
   273  	a6 := [...]T{T{}, {}, 5: T{1, 2, 3}, 7: {1, 2, 3}}
   274  	assert(len(a6) == 8)
   275  
   276  	// recursively so
   277  	_ = [10][10]T{{}, [10]T{{}}, {{1, 2, 3}}}
   278  
   279  	// from the spec
   280  	type Point struct { x, y float32 }
   281  	_ = [...]Point{Point{1.5, -3.5}, Point{0, 0}}
   282  	_ = [...]Point{{1.5, -3.5}, {0, 0}}
   283  	_ = [][]int{[]int{1, 2, 3}, []int{4, 5}}
   284  	_ = [][]int{{1, 2, 3}, {4, 5}}
   285  	_ = [...]*Point{&Point{1.5, -3.5}, &Point{0, 0}}
   286  	_ = [...]*Point{{1.5, -3.5}, {0, 0}}
   287  }
   288  
   289  func slice_literals() {
   290  	type S0 []int
   291  	_ = S0{}
   292  	_ = S0{0, 1, 2}
   293  	_ = S0{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
   294  	_ = S0{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
   295  	_ = S0{- /* ERROR "negative" */ 1: 0}
   296  	_ = S0{8: 8, 9}
   297  	_ = S0{8: 8, 9, 10}
   298  	_ = S0{0, 1, 2, 0 /* ERROR "duplicate index" */ : 0, 3: 3, 4}
   299  	_ = S0{5: 5, 6, 7, 3: 3, 4}
   300  	_ = S0{5: 5, 6, 7, 3: 3, 4, 5 /* ERROR "duplicate index" */ }
   301  	_ = S0{10: 10, 10 /* ERROR "duplicate index" */ : 10}
   302  	_ = S0{5: 5, 6, 7, 3: 3, 1 /* ERROR "overflows" */ <<100: 4, 5 /* ERROR "duplicate index" */ }
   303  	_ = S0{5: 5, 6, 7, 4: 4, 1 /* ERROR "overflows" */ <<100: 4}
   304  	_ = S0{2.0}
   305  	_ = S0{2.1 /* ERROR "truncated" */ }
   306  	_ = S0{"foo" /* ERRORx `cannot use .* in array or slice literal` */ }
   307  
   308  	// indices must be resolved correctly
   309  	const index1 = 1
   310  	_ = S0{index1: 1}
   311  	_ = S0{index2: 2}
   312  	_ = S0{index3 /* ERROR "undefined" */ : 3}
   313  
   314  	// indices must be integer constants
   315  	i := 1
   316  	const f = 2.1
   317  	const s = "foo"
   318  	_ = S0{i /* ERROR "index i must be integer constant" */ : 0}
   319  	_ = S0{f /* ERROR "truncated" */ : 0}
   320  	_ = S0{s /* ERROR "cannot convert" */ : 0}
   321  
   322  	// composite literal element types may be elided
   323  	type T []int
   324  	_ = []T{T{}, {}, 5: T{1, 2, 3}, 7: {1, 2, 3}}
   325  	_ = [][]int{{1, 2, 3}, {4, 5}}
   326  
   327  	// recursively so
   328  	_ = [][]T{{}, []T{{}}, {{1, 2, 3}}}
   329  
   330  	// issue 17954
   331  	type T0 *struct { s string }
   332  	_ = []T0{{}}
   333  	_ = []T0{{"foo"}}
   334  
   335  	type T1 *struct{ int }
   336  	_ = []T1{}
   337  	_ = []T1{{0}, {1}, {2}}
   338  
   339  	type T2 T1
   340  	_ = []T2{}
   341  	_ = []T2{{0}, {1}, {2}}
   342  
   343  	_ = map[T0]T2{}
   344  	_ = map[T0]T2{{}: {}}
   345  }
   346  
   347  const index2 int = 2
   348  
   349  type N int
   350  func (N) f() {}
   351  
   352  func map_literals() {
   353  	type M0 map[string]int
   354  	type M1 map[bool]int
   355  	type M2 map[*int]int
   356  
   357  	_ = M0{}
   358  	_ = M0{1 /* ERROR "missing key" */ }
   359  	_ = M0{1 /* ERRORx `cannot use .* in map literal` */ : 2}
   360  	_ = M0{"foo": "bar" /* ERRORx `cannot use .* in map literal` */ }
   361  	_ = M0{"foo": 1, "bar": 2, "foo" /* ERROR "duplicate key" */ : 3 }
   362  
   363  	_ = map[interface{}]int{2: 1, 2 /* ERROR "duplicate key" */ : 1}
   364  	_ = map[interface{}]int{int(2): 1, int16(2): 1}
   365  	_ = map[interface{}]int{int16(2): 1, int16 /* ERROR "duplicate key" */ (2): 1}
   366  
   367  	type S string
   368  
   369  	_ = map[interface{}]int{"a": 1, "a" /* ERROR "duplicate key" */ : 1}
   370  	_ = map[interface{}]int{"a": 1, S("a"): 1}
   371  	_ = map[interface{}]int{S("a"): 1, S /* ERROR "duplicate key" */ ("a"): 1}
   372  	_ = map[interface{}]int{1.0: 1, 1.0 /* ERROR "duplicate key" */: 1}
   373  	_ = map[interface{}]int{int64(-1): 1, int64 /* ERROR "duplicate key" */ (-1) : 1}
   374  	_ = map[interface{}]int{^uint64(0): 1, ^ /* ERROR "duplicate key" */ uint64(0): 1}
   375  	_ = map[interface{}]int{complex(1,2): 1, complex /* ERROR "duplicate key" */ (1,2) : 1}
   376  
   377  	type I interface {
   378  		f()
   379  	}
   380  
   381  	_ = map[I]int{N(0): 1, N(2): 1}
   382  	_ = map[I]int{N(2): 1, N /* ERROR "duplicate key" */ (2): 1}
   383  
   384  	// map keys must be resolved correctly
   385  	key1 := "foo"
   386  	_ = M0{key1: 1}
   387  	_ = M0{key2: 2}
   388  	_ = M0{key3 /* ERROR "undefined" */ : 2}
   389  
   390  	var value int
   391  	_ = M1{true: 1, false: 0}
   392  	_ = M2{nil: 0, &value: 1}
   393  
   394  	// composite literal element types may be elided
   395  	type T [2]int
   396  	_ = map[int]T{0: T{3, 4}, 1: {5, 6}}
   397  
   398  	// recursively so
   399  	_ = map[int][]T{0: {}, 1: {{}, T{1, 2}}}
   400  
   401  	// composite literal key types may be elided
   402  	_ = map[T]int{T{3, 4}: 0, {5, 6}: 1}
   403  
   404  	// recursively so
   405  	_ = map[[2]T]int{{}: 0, {{}}: 1, [2]T{{}}: 2, {T{1, 2}}: 3}
   406  
   407  	// composite literal element and key types may be elided
   408  	_ = map[T]T{{}: {}, {1, 2}: T{3, 4}, T{4, 5}: {}}
   409  	_ = map[T]M0{{} : {}, T{1, 2}: M0{"foo": 0}, {1, 3}: {"foo": 1}}
   410  
   411  	// recursively so
   412  	_ = map[[2]T][]T{{}: {}, {{}}: {{}, T{1, 2}}, [2]T{{}}: nil, {T{1, 2}}: {{}, {}}}
   413  
   414  	// from the spec
   415  	type Point struct { x, y float32 }
   416  	_ = map[string]Point{"orig": {0, 0}}
   417  	_ = map[*Point]string{{0, 0}: "orig"}
   418  
   419  	// issue 17954
   420  	type T0 *struct{ s string }
   421  	type T1 *struct{ int }
   422  	type T2 T1
   423  
   424  	_ = map[T0]T2{}
   425  	_ = map[T0]T2{{}: {}}
   426  }
   427  
   428  var key2 string = "bar"
   429  
   430  type I interface {
   431  	m()
   432  }
   433  
   434  type I2 interface {
   435  	m(int)
   436  }
   437  
   438  type T1 struct{}
   439  type T2 struct{}
   440  
   441  func (T2) m(int) {}
   442  
   443  type mybool bool
   444  
   445  func type_asserts() {
   446  	var x int
   447  	_ = x /* ERROR "not an interface" */ .(int)
   448  
   449  	var e interface{}
   450  	var ok bool
   451  	x, ok = e.(int)
   452  	_ = ok
   453  
   454  	// ok value is of type bool
   455  	var myok mybool
   456  	_, myok = e.(int)
   457  	_ = myok
   458  
   459  	var t I
   460  	_ = t /* ERRORx `use of .* outside type switch` */ .(type)
   461  	_ = t /* ERROR "m has pointer receiver" */ .(T)
   462  	_ = t.(*T)
   463  	_ = t /* ERROR "missing method m" */ .(T1)
   464  	_ = t /* ERROR "wrong type for method m" */ .(T2)
   465  	_ = t /* STRICT "wrong type for method m" */ .(I2) // only an error in strict mode (issue 8561)
   466  
   467  	// e doesn't statically have an m, but may have one dynamically.
   468  	_ = e.(I2)
   469  }
   470  
   471  func f0() {}
   472  func f1(x int) {}
   473  func f2(u float32, s string) {}
   474  func fs(s []byte) {}
   475  func fv(x ...int) {}
   476  func fi(x ... interface{}) {}
   477  func (T) fm(x ...int)
   478  
   479  func g0() {}
   480  func g1() int { return 0}
   481  func g2() (u float32, s string) { return }
   482  func gs() []byte { return nil }
   483  
   484  func _calls() {
   485  	var x int
   486  	var y float32
   487  	var s []int
   488  
   489  	f0()
   490  	_ = f0 /* ERROR "used as value" */ ()
   491  	f0(g0 /* ERROR "too many arguments" */ )
   492  
   493  	f1(0)
   494  	f1(x)
   495  	f1(10.0)
   496  	f1() /* ERROR "not enough arguments in call to f1\n\thave ()\n\twant (int)" */
   497  	f1(x, y /* ERROR "too many arguments in call to f1\n\thave (int, float32)\n\twant (int)" */ )
   498  	f1(s /* ERRORx `cannot use .* in argument` */ )
   499  	f1(x ... /* ERROR "cannot use ..." */ )
   500  	f1(g0 /* ERROR "used as value" */ ())
   501  	f1(g1())
   502  	f1(g2 /* ERROR "too many arguments in call to f1\n\thave (float32, string)\n\twant (int)" */ ())
   503  
   504  	f2() /* ERROR "not enough arguments in call to f2\n\thave ()\n\twant (float32, string)" */
   505  	f2(3.14) /* ERROR "not enough arguments in call to f2\n\thave (number)\n\twant (float32, string)" */
   506  	f2(3.14, "foo")
   507  	f2(x /* ERRORx `cannot use .* in argument` */ , "foo")
   508  	f2(g0 /* ERROR "used as value" */ ()) /* ERROR "not enough arguments in call to f2\n\thave (func())\n\twant (float32, string)" */
   509  	f2(g1()) /* ERROR "not enough arguments in call to f2\n\thave (int)\n\twant (float32, string)" */
   510  	f2(g2())
   511  
   512  	fs() /* ERROR "not enough arguments" */
   513  	fs(g0 /* ERROR "used as value" */ ())
   514  	fs(g1 /* ERRORx `cannot use .* in argument` */ ())
   515  	fs(g2 /* ERROR "too many arguments" */ ())
   516  	fs(gs())
   517  
   518  	fv()
   519  	fv(1, 2.0, x)
   520  	fv(s /* ERRORx `cannot use .* in argument` */ )
   521  	fv(s...)
   522  	fv(x /* ERROR "cannot use" */ ...)
   523  	fv(1, s /* ERROR "too many arguments" */ ...)
   524  	fv(gs /* ERRORx `cannot use .* in argument` */ ())
   525  	fv(gs /* ERRORx `cannot use .* in argument` */ ()...)
   526  
   527  	var t T
   528  	t.fm()
   529  	t.fm(1, 2.0, x)
   530  	t.fm(s /* ERRORx `cannot use .* in argument` */ )
   531  	t.fm(g1())
   532  	t.fm(1, s /* ERROR "too many arguments" */ ...)
   533  	t.fm(gs /* ERRORx `cannot use .* in argument` */ ())
   534  	t.fm(gs /* ERRORx `cannot use .* in argument` */ ()...)
   535  
   536  	T.fm(t, )
   537  	T.fm(t, 1, 2.0, x)
   538  	T.fm(t, s /* ERRORx `cannot use .* in argument` */ )
   539  	T.fm(t, g1())
   540  	T.fm(t, 1, s /* ERROR "too many arguments" */ ...)
   541  	T.fm(t, gs /* ERRORx `cannot use .* in argument` */ ())
   542  	T.fm(t, gs /* ERRORx `cannot use .* in argument` */ ()...)
   543  
   544  	var i interface{ fm(x ...int) } = t
   545  	i.fm()
   546  	i.fm(1, 2.0, x)
   547  	i.fm(s /* ERRORx `cannot use .* in argument` */ )
   548  	i.fm(g1())
   549  	i.fm(1, s /* ERROR "too many arguments" */ ...)
   550  	i.fm(gs /* ERRORx `cannot use .* in argument` */ ())
   551  	i.fm(gs /* ERRORx `cannot use .* in argument` */ ()...)
   552  
   553  	fi()
   554  	fi(1, 2.0, x, 3.14, "foo")
   555  	fi(g2())
   556  	fi(0, g2)
   557  	fi(0, g2 /* ERROR "multiple-value g2" */ ())
   558  }
   559  
   560  func issue6344() {
   561  	type T []interface{}
   562  	var x T
   563  	fi(x...) // ... applies also to named slices
   564  }
   565
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