func (c *converter) convertPointer(v *gotypes.Pointer) *types.Pointer {
if v == nil {
return nil
}
if v, ok := c.converted[v]; ok {
return v.(*types.Pointer)
}
ret := types.NewPointer(c.convertType(v.Elem()))
c.converted[v] = ret
return ret
}
// ExampleMethodSet prints the method sets of various types.
func ExampleMethodSet() {
// Parse a single source file.
const input = `
package temperature
import "fmt"
type Celsius float64
func (c Celsius) String() string { return fmt.Sprintf("%g°C", c) }
func (c *Celsius) SetF(f float64) { *c = Celsius(f - 32 / 9 * 5) }
`
fset := token.NewFileSet()
f, err := parser.ParseFile(fset, "celsius.go", input, 0)
if err != nil {
log.Fatal(err)
}
// Type-check a package consisting of this file.
// Type information for the imported packages
// comes from $GOROOT/pkg/$GOOS_$GOOARCH/fmt.a.
conf := types.Config{Importer: importer.Default([]*ast.File{f})}
pkg, err := conf.Check("temperature", fset, []*ast.File{f}, nil)
if err != nil {
log.Fatal(err)
}
// Print the method sets of Celsius and *Celsius.
celsius := pkg.Scope().Lookup("Celsius").Type()
for _, t := range []types.Type{celsius, types.NewPointer(celsius)} {
fmt.Printf("Method set of %s:\n", t)
mset := types.NewMethodSet(t)
for i := 0; i < mset.Len(); i++ {
fmt.Println(mset.At(i))
}
fmt.Println()
}
// Output:
// Method set of temperature.Celsius:
// method (temperature.Celsius) String() string
//
// Method set of *temperature.Celsius:
// method (*temperature.Celsius) SetF(f float64)
// method (*temperature.Celsius) String() string
}