On Saturday, 13 August 2016 22:27:42 UTC+1, Paul Jolly wrote:
>
> On Saturday, 13 August 2016 21:58:37 UTC+1, Paul Jolly wrote:
>>
>> Am I missing something obvious here?
>>
>
> Please excuse the reply to self, but I have discovered what I was missing.
>
> For the sake of completeness, here is how the equivalent mapping is
> achieved in golang.org/x/tools/go/loader world:
>
> import (
> "go/ast"
> "go/parser"
> "golang.org/x/tools/go/loader"
> )
>
>
> conf := loader.Config{
> ParserMode: parser.AllErrors | parser.ParseComments,
> Cwd:path,
> }
>
> ...
>
> conf.CreateFromFilenames(path, toParse...)
>
> prog, err := conf.Load()
> if err != nil {
> panic(err)
> }
>
> At this point conf.CreatePkgs (type []loader.PkgSpec) and prog.Created
> (type []*loader.PackageInfo) correspond to each other.
>
> For each (loader.PkgSpec, *loader.PackageInfo) pairing, say pkgSpec and
> pkgInfo, then pkgSpec.Filenames (type []string) and pkgInfo (type
> []*ast.File) again correspond, which gives us the required mapping.
>
You can obtain the name of the file from which the *ast.File f was parsed
using the following expression: prog.Fset.Position(f.Pos()).Filename
cheers
alan
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