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 // method declarations
6
7 package decls2
8
9 import "io"
10
11 const pi = 3.1415
12
13 func (T1) m /* ERROR "already declared" */ () {}
14 func (T2) m(io.Writer) {}
15
16 type T3 struct {
17 f *T3
18 }
19
20 type T6 struct {
21 x int
22 }
23
24 func (t *T6) m1() int {
25 return t.x
26 }
27
28 func f() {
29 var t *T6
30 t.m1()
31 }
32
33 // Double declarations across package files
34 const c_double /* ERROR "redeclared" */ = 0
35 type t_double /* ERROR "redeclared" */ int
36 var v_double /* ERROR "redeclared" */ int
37 func f_double /* ERROR "redeclared" */ () {}
38
39 // Blank methods need to be type-checked.
40 // Verify by checking that errors are reported.
41 func (T /* ERROR "undeclared" */ ) _() {}
42 func (T1) _(undeclared /* ERROR "undeclared" */ ) {}
43 func (T1) _() int { return "foo" /* ERROR "cannot use .* in return statement" */ }
44
45 // Methods with undeclared receiver type can still be checked.
46 // Verify by checking that errors are reported.
47 func (Foo /* ERROR "undeclared" */ ) m() {}
48 func (Foo /* ERROR "undeclared" */ ) m(undeclared /* ERROR "undeclared" */ ) {}
49 func (Foo /* ERROR "undeclared" */ ) m() int { return "foo" /* ERROR "cannot use .* in return statement" */ }
50
51 func (Foo /* ERROR "undeclared" */ ) _() {}
52 func (Foo /* ERROR "undeclared" */ ) _(undeclared /* ERROR "undeclared" */ ) {}
53 func (Foo /* ERROR "undeclared" */ ) _() int { return "foo" /* ERROR "cannot use .* in return statement" */ }
54
55 // Receiver declarations are regular parameter lists;
56 // receiver types may use parentheses, and the list
57 // may have a trailing comma.
58 type T7 struct {}
59
60 func (T7) m1() {}
61 func ((T7)) m2() {}
62 func ((*T7)) m3() {}
63 func (x *(T7),) m4() {}
64 func (x (*(T7)),) m5() {}
65 func (x ((*((T7)))),) m6() {}
66
67 // Check that methods with parenthesized receiver are actually present (issue #23130).
68 var (
69 _ = T7.m1
70 _ = T7.m2
71 _ = (*T7).m3
72 _ = (*T7).m4
73 _ = (*T7).m5
74 _ = (*T7).m6
75 )
76
View as plain text