// indirect(typ) assumes that typ is a pointer type,
// or named alias thereof, and returns its base type.
// Panic ensures if it is not a pointer.
//
func indirectType(ptr types.Type) types.Type {
if v, ok := underlyingType(ptr).(*types.Pointer); ok {
return v.Base
}
// When debugging it is convenient to comment out this line
// and let it continue to print the (illegal) SSA form.
panic("indirect() of non-pointer type: " + ptr.String())
return nil
}
// writeSignature writes to w the signature sig in declaration syntax.
// Derived from types.Signature.String().
//
func writeSignature(w io.Writer, name string, sig *types.Signature, params []*Parameter) {
io.WriteString(w, "func ")
if sig.Recv != nil {
io.WriteString(w, "(")
if n := params[0].Name(); n != "" {
io.WriteString(w, n)
io.WriteString(w, " ")
}
io.WriteString(w, params[0].Type().String())
io.WriteString(w, ") ")
params = params[1:]
}
io.WriteString(w, name)
io.WriteString(w, "(")
for i, v := range params {
if i > 0 {
io.WriteString(w, ", ")
}
io.WriteString(w, v.Name())
io.WriteString(w, " ")
if sig.IsVariadic && i == len(params)-1 {
io.WriteString(w, "...")
io.WriteString(w, underlyingType(v.Type()).(*types.Slice).Elt.String())
} else {
io.WriteString(w, v.Type().String())
}
}
io.WriteString(w, ")")
if res := sig.Results; res != nil {
io.WriteString(w, " ")
var t types.Type
if len(res) == 1 && res[0].Name == "" {
t = res[0].Type
} else {
t = &types.Result{Values: res}
}
io.WriteString(w, t.String())
}
}
// hashType returns a hash for t such that
// types.IsIdentical(x, y) => hashType(x) == hashType(y).
func hashType(t types.Type) int {
return hashString(t.String()) // TODO(gri): provide a better hash
}