display

Documentation

Overview

Example (Array)

Display("x", [1]interface{}{3})

Output:

Display x ([1]interface {}):
x[0].type = int
x[0].value = 3

Example (Expr)

e, _ := eval.Parse("sqrt(A / pi)")
Display("e", e)

Output:

Display e (eval.call):
e.fn = "sqrt"
e.args[0].type = eval.binary
e.args[0].value.op = 47
e.args[0].value.x.type = eval.Var
e.args[0].value.x.value = "A"
e.args[0].value.y.type = eval.Var
e.args[0].value.y.value = "pi"

Example (Interface)

var i interface{} = 3
Display("i", i)

Output:

Display i (int):
i = 3

Example (Movie)

//!+movie
type Movie struct {
	Title, Subtitle string
	Year            int
	Color           bool
	Actor           map[string]string
	Oscars          []string
	Sequel          *string
}
//!-movie
//!+strangelove
strangelove := Movie{
	Title:    "Dr. Strangelove",
	Subtitle: "How I Learned to Stop Worrying and Love the Bomb",
	Year:     1964,
	Color:    false,
	Actor: map[string]string{
		"Dr. Strangelove":            "Peter Sellers",
		"Grp. Capt. Lionel Mandrake": "Peter Sellers",
		"Pres. Merkin Muffley":       "Peter Sellers",
		"Gen. Buck Turgidson":        "George C. Scott",
		"Brig. Gen. Jack D. Ripper":  "Sterling Hayden",
		`Maj. T.J. "King" Kong`:      "Slim Pickens",
	},

	Oscars: []string{
		"Best Actor (Nomin.)",
		"Best Adapted Screenplay (Nomin.)",
		"Best Director (Nomin.)",
		"Best Picture (Nomin.)",
	},
}
//!-strangelove
Display("strangelove", strangelove)

// We don't use an Output: comment since displaying
// a map is nondeterministic.
/*
	//!+output
	Display strangelove (display.Movie):
	strangelove.Title = "Dr. Strangelove"
	strangelove.Subtitle = "How I Learned to Stop Worrying and Love the Bomb"
	strangelove.Year = 1964
	strangelove.Color = false
	strangelove.Actor["Gen. Buck Turgidson"] = "George C. Scott"
	strangelove.Actor["Brig. Gen. Jack D. Ripper"] = "Sterling Hayden"
	strangelove.Actor["Maj. T.J. \"King\" Kong"] = "Slim Pickens"
	strangelove.Actor["Dr. Strangelove"] = "Peter Sellers"
	strangelove.Actor["Grp. Capt. Lionel Mandrake"] = "Peter Sellers"
	strangelove.Actor["Pres. Merkin Muffley"] = "Peter Sellers"
	strangelove.Oscars[0] = "Best Actor (Nomin.)"
	strangelove.Oscars[1] = "Best Adapted Screenplay (Nomin.)"
	strangelove.Oscars[2] = "Best Director (Nomin.)"
	strangelove.Oscars[3] = "Best Picture (Nomin.)"
	strangelove.Sequel = nil
	//!-output
*/

Example (NilInterface)

var w io.Writer
Display("w", w)

Output:

Display w (<nil>):
w = invalid

Example (PtrToInterface)

var w io.Writer
Display("&w", &w)

Output:

Display &w (*io.Writer):
(*&w) = nil

Example (PtrToInterface2)

var i interface{} = 3
Display("&i", &i)

Output:

Display &i (*interface {}):
(*&i).type = int
(*&i).value = 3

Example (Slice)

Display("slice", []*int{new(int), nil})

Output:

Display slice ([]*int):
(*slice[0]) = 0
slice[1] = nil

Example (Struct)

Display("x", struct{ x interface{} }{3})

Output:

Display x (struct { x interface {} }):
x.x.type = int
x.x.value = 3

Index

• func Display(name string, x interface{})

Examples

• Package (Array)
• Package (Expr)
• Package (Interface)
• Package (Movie)
• Package (NilInterface)
• Package (PtrToInterface)
• Package (PtrToInterface2)
• Package (Slice)
• Package (Struct)

Functions

func Display

func Display(name string, x interface{})