| package A1 |
| |
| import ( |
| . "fmt" |
| myfmt "fmt" |
| "os" |
| "strings" |
| ) |
| |
| func example(n int) { |
| x := "foo" + strings.Repeat("\t", n) |
| // Match, despite named import. |
| myfmt.Errorf("%s", x) |
| |
| // Match, despite dot import. |
| Errorf("%s", x) |
| |
| // Match: multiple matches in same function are possible. |
| myfmt.Errorf("%s", x) |
| |
| // No match: wildcarded operand has the wrong type. |
| myfmt.Errorf("%s", 3) |
| |
| // No match: function operand doesn't match. |
| myfmt.Printf("%s", x) |
| |
| // No match again, dot import. |
| Printf("%s", x) |
| |
| // Match. |
| myfmt.Fprint(os.Stderr, myfmt.Errorf("%s", x+"foo")) |
| |
| // No match: though this literally matches the template, |
| // fmt doesn't resolve to a package here. |
| var fmt struct{ Errorf func(string, string) } |
| fmt.Errorf("%s", x) |
| |
| // Recursive matching: |
| |
| // Match: both matches are well-typed, so both succeed. |
| myfmt.Errorf("%s", myfmt.Errorf("%s", x+"foo").Error()) |
| |
| // Outer match succeeds, inner doesn't: 3 has wrong type. |
| myfmt.Errorf("%s", myfmt.Errorf("%s", 3).Error()) |
| |
| // Inner match succeeds, outer doesn't: the inner replacement |
| // has the wrong type (error not string). |
| myfmt.Errorf("%s", myfmt.Errorf("%s", x+"foo")) |
| } |