gopls/internal/analysis/unusedfunc/testdata/fields.txtar

Test of unused struct fields.

-- go.mod --
module example.com

go 1.21

-- f/f.go --
package f

type T struct {
	Exported int
	used     int
	unused   int // want `field "unused" is unused`
	// doc comment
	unused2 int // want `field "unused2" is unused`
	x, unused3, y int // want `field "unused3" is unused`
	unused4, z int // want `field "unused4" is unused`
	w, unused5 int // want `field "unused5" is unused`
	_     int
	embedded
	last int // want `field "last" is unused`
}

type embedded struct{}

// Fields conventionally used for padding are exempt.
type P struct {
	pad     [4]byte
	pad0    int
	pad_x   int
	padX    int
	pad世   int
	padding int // want `field "padding" is unused`
	paddle  int // want `field "paddle" is unused`
}

type U struct {
	a, b int // used by unkeyed literal
}

type G[T any] struct {
	used   T
	unused T // want `field "unused" is unused`
}

func _() {
	var t T
	print(t.used, t.x, t.y, t.z, t.w)
	_ = U{1, 2}
	print(G[int]{}.used)

	// Anonymous struct types are not checked.
	var anon struct {
		used   int
		unused int
	}
	print(anon.used)

	// Local named types are checked.
	type local struct {
		used   int
		unused int // want `field "unused" is unused`
	}
	print(local{}.used)
}

// Aliases of anonymous struct types are not checked.
type A = struct{ unused int }

// Nested anonymous struct types are not checked.
type N struct {
	used struct{ unused int }
}

var _ = N{}.used

-- f/f.go.golden --
package f

type T struct {
	Exported int
	used     int
	x, y     int // want `field "unused3" is unused`
	z        int // want `field "unused4" is unused`
	w        int // want `field "unused5" is unused`
	_        int
	embedded
}

type embedded struct{}

// Fields conventionally used for padding are exempt.
type P struct {
	pad   [4]byte
	pad0  int
	pad_x int
	padX  int
	pad世  int
}

type U struct {
	a, b int // used by unkeyed literal
}

type G[T any] struct {
	used T
}

func _() {
	var t T
	print(t.used, t.x, t.y, t.z, t.w)
	_ = U{1, 2}
	print(G[int]{}.used)

	// Anonymous struct types are not checked.
	var anon struct {
		used   int
		unused int
	}
	print(anon.used)

	// Local named types are checked.
	type local struct {
		used int
	}
	print(local{}.used)
}

// Aliases of anonymous struct types are not checked.
type A = struct{ unused int }

// Nested anonymous struct types are not checked.
type N struct {
	used struct{ unused int }
}

var _ = N{}.used