// checkInFileBlock performs safety checks for renames of objects in the file block,
// i.e. imported package names.
func (r *renamer) checkInFileBlock(from *types.PkgName) {
// Check import name is not "init".
if r.to == "init" {
r.errorf(from.Pos(), "%q is not a valid imported package name", r.to)
}
// Check for conflicts between file and package block.
if prev := from.Pkg().Scope().Lookup(r.to); prev != nil {
r.errorf(from.Pos(), "renaming this %s %q to %q would conflict",
objectKind(from), from.Name(), r.to)
r.errorf(prev.Pos(), "\twith this package member %s",
objectKind(prev))
return // since checkInPackageBlock would report redundant errors
}
// Check for conflicts in lexical scope.
r.checkInLexicalScope(from, r.packages[from.Pkg()])
// Finally, modify ImportSpec syntax to add or remove the Name as needed.
info, path, _ := r.iprog.PathEnclosingInterval(from.Pos(), from.Pos())
if from.Imported().Name() == r.to {
// ImportSpec.Name not needed
path[1].(*ast.ImportSpec).Name = nil
} else {
// ImportSpec.Name needed
if spec := path[1].(*ast.ImportSpec); spec.Name == nil {
spec.Name = &ast.Ident{NamePos: spec.Path.Pos(), Name: r.to}
info.Defs[spec.Name] = from
}
}
}
func (c *converter) convertPkgName(v *gotypes.PkgName) *types.PkgName {
if v == nil {
return nil
}
if v, ok := c.converted[v]; ok {
return v.(*types.PkgName)
}
ret := types.NewPkgName(
token.Pos(v.Pos()),
c.ret,
v.Name(),
c.convertPackage(v.Imported()),
)
c.converted[v] = ret
return ret
}