/
generic.go
69 lines (55 loc) · 1.16 KB
/
generic.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
package generic
import (
"go/ast"
"go/format"
"go/parser"
"go/token"
"io"
"log"
"github.com/vasilevp/aboriginal/generic/visitor"
"github.com/pkg/errors"
)
func copyImports(src, dest *ast.File) {
for _, v := range src.Decls {
v, ok := v.(*ast.GenDecl)
if !ok {
break
}
for _, spec := range v.Specs {
if _, ok := spec.(*ast.ImportSpec); !ok {
return
}
}
dest.Decls = append(dest.Decls, v)
}
}
func Process(in interface{}, out io.Writer, filename string) error {
fset := token.NewFileSet()
f, err := parser.ParseFile(fset, filename, in, parser.ParseComments)
if err != nil {
return errors.Wrap(err, "cannot parse source")
}
v := visitor.New(f)
ast.Walk(v, f)
newf := &ast.File{
Doc: f.Doc,
Name: f.Name,
Decls: nil,
Scope: f.Scope,
Imports: f.Imports,
Unresolved: f.Unresolved,
// Comments: f.Comments,
}
for _, v := range f.Unresolved {
log.Printf("U %v", v.Name)
}
copyImports(f, newf)
for _, t := range v.GeneratedDecls() {
newf.Decls = append(newf.Decls, t)
}
err = format.Node(out, fset, newf)
if err != nil {
return errors.Wrap(err, "cannot format source")
}
return nil
}