func (p *Parser) Ast(fs *token.FileSet, path string, files []string, unsaved map[string]UnsavedDocument) (*ast.File, []*ast.File, error) {
ret := make([]*ast.File, len(files))
var retf *ast.File
var errors scanner.ErrorList
for i, f := range files {
f = CanonicalPath(f)
var v *ast.File
var err error
if uns, ok := unsaved[f]; ok {
v, err = parser.ParseFile(fs, f, uns.Data, parser.AllErrors)
} else {
v, err = p.fromCache(fs, f)
}
if v == nil {
return nil, nil, err
}
ret[i] = v
if path == f {
retf = ret[i]
if perr, ok := err.(scanner.ErrorList); ok {
for _, e := range perr {
errors.Add(e.Pos, e.Msg)
}
}
}
}
errors.RemoveMultiples()
errors.Sort()
var err error
if len(errors) != 0 {
err = errors
}
return retf, ret, err
}
