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go/ast: fix ast.MergePackageFiles to collect infos about imports

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R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/4710047
This commit is contained in:
Sebastien Binet 2011-08-22 12:53:05 -07:00 committed by Robert Griesemer
parent 7bbe2c8998
commit c7a742c510
1 changed files with 30 additions and 3 deletions
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33
src/pkg/go/ast/filter.go
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@ -344,6 +344,8 @@ const (
// If set, comments that are not associated with a specific
// AST node (as Doc or Comment) are excluded.
FilterUnassociatedComments
// If set, duplicate import declarations are excluded.
FilterImportDuplicates
)
// separator is an empty //-style comment that is interspersed between
@ -459,6 +461,32 @@ func MergePackageFiles(pkg *Package, mode MergeMode) *File {
}
}
// Collect import specs from all package files.
var imports []*ImportSpec
if mode&FilterImportDuplicates != 0 {
seen := make(map[string]bool)
for _, f := range pkg.Files {
for _, imp := range f.Imports {
path := imp.Path.Value
if !seen[path] {
//TODO: consider handling cases where:
// - 2 imports exist with the same import path but
// have different local names (one should probably
// keep both of them)
// - 2 imports exist but only one has a comment
// - 2 imports exist and they both have (possibly
// different) comments
seen[path] = true
imports = append(imports, imp)
}
}
}
} else {
for _, f := range pkg.Files {
imports = append(imports, f.Imports...)
}
}
// Collect comments from all package files.
var comments []*CommentGroup
if mode&FilterUnassociatedComments == 0 {
@ -469,7 +497,6 @@ func MergePackageFiles(pkg *Package, mode MergeMode) *File {
}
}
// TODO(gri) need to compute pkgScope and unresolved identifiers!
// TODO(gri) need to compute imports!
return &File{doc, pos, NewIdent(pkg.Name), decls, nil, nil, nil, comments}
// TODO(gri) need to compute unresolved identifiers!
return &File{doc, pos, NewIdent(pkg.Name), decls, pkg.Scope, imports, nil, comments}
}