// deeper reports whether block x is lexically deeper than y.
func deeper(x, y *types.Scope) bool {
if x == y || x == nil {
return false
} else if y == nil {
return true
} else {
return deeper(x.Parent(), y.Parent())
}
}
// getTypeStruct will take a type and the package scope, and return the
// (innermost) struct if the type is considered a RR type (currently defined as
// those structs beginning with a RR_Header, could be redefined as implementing
// the RR interface). The bool return value indicates if embedded structs were
// resolved.
func getTypeStruct(t types.Type, scope *types.Scope) (*types.Struct, bool) {
st, ok := t.Underlying().(*types.Struct)
if !ok {
return nil, false
}
if st.Field(0).Type() == scope.Lookup("RR_Header").Type() {
return st, false
}
if st.Field(0).Anonymous() {
st, _ := getTypeStruct(st.Field(0).Type(), scope)
return st, true
}
return nil, false
}
func analyzeCode(scope *types.Scope, docs *doc.Package, variable string) (imports.Importer, []fn, error) {
pkg := docs.Name
v, ok := scope.Lookup(variable).(*types.Var)
if v == nil {
return nil, nil, fmt.Errorf("impossible to find variable %s", variable)
}
if !ok {
return nil, nil, fmt.Errorf("%s must be a variable", variable)
}
var vType interface {
NumMethods() int
Method(int) *types.Func
}
switch t := v.Type().(type) {
case *types.Interface:
vType = t
case *types.Pointer:
vType = t.Elem().(*types.Named)
case *types.Named:
vType = t
if t, ok := t.Underlying().(*types.Interface); ok {
vType = t
}
default:
return nil, nil, fmt.Errorf("variable is of an invalid type: %T", v.Type().Underlying())
}
importer := imports.New(pkg)
var funcs []fn
for i := 0; i < vType.NumMethods(); i++ {
f := vType.Method(i)
if !f.Exported() {
continue
}
sig := f.Type().(*types.Signature)
funcs = append(funcs, fn{
WrappedVar: variable,
Name: f.Name(),
CurrentPkg: pkg,
TypeInfo: f,
})
importer.AddImportsFrom(sig.Params())
importer.AddImportsFrom(sig.Results())
}
return importer, funcs, nil
}
func (c *converter) convertScope(dst *types.Scope, src *gotypes.Scope) {
for _, name := range src.Names() {
obj := src.Lookup(name)
dst.Insert(c.convertObject(obj))
}
for i := 0; i < src.NumChildren(); i++ {
child := src.Child(i)
newScope := types.NewScope(dst, token.Pos(child.Pos()), token.Pos(child.End()), "")
c.convertScope(newScope, child)
}
}
func extractTestFunctions(scope *types.Scope) []string {
var tests []string
for _, name := range scope.Names() {
if !strings.HasPrefix(name, "Test") {
continue
}
if f, ok := scope.Lookup(name).(*types.Func); ok {
sig := f.Type().(*types.Signature)
// basic signature checks
if sig.Recv() != nil {
log.Printf("Skipping %q - test function should not be a method", f.String())
continue
}
if sig.Variadic() {
log.Printf("Skipping %q - test function should not be variadic", f.String())
continue
}
if sig.Results() != nil {
log.Printf("Skipping %q - test function should not return result", f.String())
continue
}
// check params
params := sig.Params()
if params != nil || params.Len() == 1 {
if named, ok := params.At(0).Type().(*types.Named); ok {
if named.Obj().Name() == "TestingT" {
tests = append(tests, f.Name())
continue
}
}
}
log.Printf("Skipping %q - test function should have one parameter of type gophers.TestingT", f.String())
}
}
return tests
}
// analyzeCode takes the types scope and the docs and returns the import
// information and information about all the assertion functions.
func analyzeCode(scope *types.Scope, docs *doc.Package) (imports.Importer, []testFunc, error) {
testingT := scope.Lookup("TestingT").Type().Underlying().(*types.Interface)
importer := imports.New(*outputPkg)
var funcs []testFunc
// Go through all the top level functions
for _, fdocs := range docs.Funcs {
// Find the function
obj := scope.Lookup(fdocs.Name)
fn, ok := obj.(*types.Func)
if !ok {
continue
}
// Check function signatuer has at least two arguments
sig := fn.Type().(*types.Signature)
if sig.Params().Len() < 2 {
continue
}
// Check first argument is of type testingT
first, ok := sig.Params().At(0).Type().(*types.Named)
if !ok {
continue
}
firstType, ok := first.Underlying().(*types.Interface)
if !ok {
continue
}
if !types.Implements(firstType, testingT) {
continue
}
funcs = append(funcs, testFunc{*outputPkg, fdocs, fn})
importer.AddImportsFrom(sig.Params())
}
return importer, funcs, nil
}
func (c *Suggester) scopeCandidates(scope *types.Scope, pos token.Pos, b *candidateCollector) {
seen := make(map[string]bool)
for scope != nil {
isPkgScope := scope.Parent() == types.Universe
for _, name := range scope.Names() {
if seen[name] {
continue
}
obj := scope.Lookup(name)
if !isPkgScope && obj.Pos() > pos {
continue
}
seen[name] = true
b.appendObject(obj)
}
scope = scope.Parent()
}
}
