func main() {
flag.Parse()
in, err := os.Open(flag.Arg(0))
if err != nil {
die(err)
}
defer in.Close()
src, err := ioutil.ReadAll(in)
if err != nil {
die(err)
}
l := token.NewLexer(in.Name(), string(src))
p := ast.NewParser(l)
root, err := ast.Parse(p)
if err != nil {
die(err)
}
if *gv {
dot(root)
} else {
out := bufio.NewWriter(os.Stdout)
if err = pretty.Fprint(out, root); err != nil {
die(err)
}
out.Flush()
}
}
func TestScopeFind(t *testing.T) {
src := `
package testpkg
const (
π = 3.1415926535
name = "eaburns"
)
var mayChange int = f()
var len = 1 // Shadows the predeclared len function.
func f() int { return 0 }
`
p := NewParser(token.NewLexer("", src))
s, err := pkgDecls([]*File{parseFile(p)})
if err != nil {
panic(err)
}
tests := []struct {
id string
declType reflect.Type
}{
{"π", reflect.TypeOf(&constSpecView{})},
{"name", reflect.TypeOf(&constSpecView{})},
{"mayChange", reflect.TypeOf(&varSpecView{})},
{"len", reflect.TypeOf(&varSpecView{})},
{"f", reflect.TypeOf(&FunctionDecl{})},
{"notDefined", nil},
}
for _, test := range tests {
d := s.Find(test.id)
typ := reflect.TypeOf(d)
if (d == nil && test.declType != nil) || (d != nil && typ != test.declType) {
t.Errorf("Find(%s)=%s, want %s", test.id, typ, test.declType)
}
}
// Our testing source file shadowed len, but let's check that it's
// still findable in the universal scope.
d := univScope.Find("len")
typ := reflect.TypeOf(d)
lenType := reflect.TypeOf(&predeclaredFunc{})
if d == nil || typ != lenType {
t.Errorf("Find(len)=%s, want %s", typ, lenType)
}
// Rune and byte are aliases for int32 and uint8 respectively;
// the have the same declaration.
if univScope.Find("rune") != univScope.Find("int32") {
t.Errorf("rune is not an alias for int32")
}
if univScope.Find("byte") != univScope.Find("uint8") {
t.Errorf("byte is not an alias for uint8")
}
}
func parseSrcFiles(t *testing.T, srcFiles []string) []*File {
var files []*File
for _, src := range srcFiles {
p := NewParser(token.NewLexer("", src))
file, err := Parse(p)
if err == nil {
files = append(files, file)
continue
}
t.Fatalf("Parse(%s), got unexpected error %v", src, err)
return nil
}
return files
}
func TestCheckTypes(t *testing.T) {
// The source must contain an identifier α.
// The test calls Check and compares the type of α to the given Type.
tests := []struct {
src string
t Type
}{
// Literals
{`package a; const α = 1`, Untyped(IntegerConst)},
{`package a; const α = 1.0`, Untyped(FloatConst)},
{`package a; const α = 1.0i`, Untyped(ComplexConst)},
{`package a; const α = 'a'`, Untyped(RuneConst)},
{`package a; const α = "Hello, World!"`, Untyped(StringConst)},
// Identifiers
{`package a; const α = true`, Untyped(BoolConst)},
{`package a; const α = false`, Untyped(BoolConst)},
{`package a; const α = iota`, Untyped(IntegerConst)},
{`package a; const ( a = iota; α )`, Untyped(IntegerConst)},
{`package a; const α int = 1`, intType},
{`package a; const α float64 = 'a'`, float64Type},
{`package a; const a, b, c, α int = 1, 2, 3, 4`, intType},
{`package a; const ( a int = iota; α )`, intType},
// UnaryOps
{`package a; const α = -1`, Untyped(IntegerConst)},
{`package a; const α = -1.0`, Untyped(FloatConst)},
{`package a; const α = -1.0i`, Untyped(ComplexConst)},
{`package a; const α = -'a'`, Untyped(RuneConst)},
{`package a; const α = !true`, Untyped(BoolConst)},
{`package a; const α = -iota`, Untyped(IntegerConst)},
{`package a; const α = ^1`, Untyped(IntegerConst)},
{`package a; const α = +1.189`, Untyped(FloatConst)},
{`package a; const α int = -1`, intType},
{`package a; const α int = +1.0`, intType},
{`package a; const α int = ^1`, intType},
{`package a; const α int = ^1`, intType},
}
for _, test := range tests {
l := token.NewLexer("", test.src)
p := NewParser(l)
f := parseFile(p)
if err := Check([]*File{f}); err != nil {
t.Errorf("Check(%v), unexpected error: %v", test.src, err)
continue
}
d := f.syms.Find("α")
if d == nil {
t.Errorf("Check(%v): failed to find symbol α", test.src)
continue
}
var typ Type
switch d := d.(type) {
case *constSpecView:
typ = d.Type
case *varSpecView:
typ = d.Type
default:
panic("declaration type not supported")
}
if !eq.Deep(typ, test.t) {
t.Errorf("Check(%v)=%v: α's type is %v, want %v", test.src,
pretty.String(f), pretty.String(typ), pretty.String(test.t))
}
}
}
func TestConstFolding(t *testing.T) {
runeNeg97 := intLit("-97")
runeNeg97.Rune = true
// The source must contain a const α. The test calls Check on the source and
// compares the resulting value of α to the given Expression.
tests := []struct {
src string
v Expression
}{
{`package a; const α = 1`, intLit("1")},
{`package a; const α = 1.0`, floatLit("1.0")},
{`package a; const α = 1.0i`, imgLit("1.0")},
{`package a; const α = 'a'`, runeLit('a')},
{`package a; const α = "Hello, World!"`, strLit("Hello, World!")},
{`package a; const α = true`, &BoolLiteral{Value: true}},
{`package a; const α = false`, &BoolLiteral{Value: false}},
{`package a; const α, b = b, 5`, intLit("5")},
{`package a; const α = iota`, intLit("0")},
{`package a; const ( zero = iota; α )`, intLit("1")},
{`package a; const ( zero = iota; one; α )`, intLit("2")},
{`package a; const α = +1`, intLit("1")},
{`package a; const α = -1`, intLit("-1")},
{`package a; const α = - -1`, intLit("1")},
{`package a; const α = +'a'`, runeLit('a')},
{`package a; const α = -'a'`, runeNeg97},
{`package a; const α = +1.0`, floatLit("1.0")},
{`package a; const α = - - -1.0`, floatLit("-1.0")},
{`package a; const α = +1.0i`, imgLit("1.0")},
{`package a; const α = - - -1.0i`, imgLit("-1.0")},
{`package a; const α = ^0`, intLit("-1")},
{`package a; const α = ^1`, intLit("-2")},
{`package a; const α float64 = ^256`, intLit("-257")},
{`package a; const α = !true`, &BoolLiteral{Value: false}},
{`package a; const α = !!true`, &BoolLiteral{Value: true}},
{`package a; const α = !false`, &BoolLiteral{Value: true}},
{`package a; const α = !!false`, &BoolLiteral{Value: false}},
{`package a; const f, α = false, !f`, &BoolLiteral{Value: true}},
}
for _, test := range tests {
l := token.NewLexer("", test.src)
p := NewParser(l)
f := parseFile(p)
if err := Check([]*File{f}); err != nil {
t.Errorf("Check(%v), unexpected error: %v", test.src, err)
continue
}
d := f.syms.Find("α")
if d == nil {
t.Errorf("Check(%v): failed to find symbol α", test.src)
continue
}
a, ok := d.(*constSpecView)
if !ok {
t.Errorf("Check(%v): α is not a const", test.src)
continue
}
if !eq.Deep(a.Value, test.v) {
t.Errorf("Check(%v)=%v: α folded to %v, want %v", test.src,
pretty.String(f), pretty.String(a.Value), pretty.String(test.v))
}
}
}
func TestCheckErrors(t *testing.T) {
tests := []struct {
src []string
errs []reflect.Type
}{
{[]string{`package a`, `package a`}, []reflect.Type{}},
// Consts
{
[]string{
`package a
const (
complexConst = 5i
floatConst = 3.1415926535
intConst = 6
runeConst = 'α'
stringConst = "Hello, World!"
trueConst, falseConst = true, false
)`,
},
[]reflect.Type{},
},
{
[]string{
`package a; const pi = 3.1415926535`,
`package a; const π = pi`,
},
[]reflect.Type{},
},
{
[]string{
`package a
const (
zero = iota
one
two
)`,
},
[]reflect.Type{},
},
{[]string{`package a; const i int = 5`}, []reflect.Type{}},
{[]string{`package a; const f float64 = 5`}, []reflect.Type{}},
{[]string{`package a; const c complex128 = 5`}, []reflect.Type{}},
{[]string{`package a; const s string = ""`}, []reflect.Type{}},
{[]string{`package a; const r rune = 'β'`}, []reflect.Type{}},
{[]string{`package a; const r int = 'β'`}, []reflect.Type{}},
{[]string{`package a; const b bool = true`}, []reflect.Type{}},
{[]string{`package a; const b bool = false`}, []reflect.Type{}},
{[]string{`package a; const a bool = false; const b bool = a`}, []reflect.Type{}},
{[]string{`package a; const a int = 0; const b int = a`}, []reflect.Type{}},
{[]string{`package a; const a int32 = 0; const b rune = a`}, []reflect.Type{}},
{
[]string{`package a; const a = undeclared`},
[]reflect.Type{reflect.TypeOf(Undeclared{})},
},
{
[]string{`package a; const a, b = 1`},
[]reflect.Type{reflect.TypeOf(AssignCountMismatch{})},
},
{
[]string{`package a; const nilConst = nil`},
[]reflect.Type{reflect.TypeOf(NotConstant{})},
},
{
[]string{`package a; const a = a`},
[]reflect.Type{reflect.TypeOf(ConstantLoop{})},
},
{
[]string{
`package a; const a = b`,
`package a; const b = c`,
`package a; const c = a`,
},
[]reflect.Type{reflect.TypeOf(ConstantLoop{})},
},
{
[]string{`package a; const i int = ""`},
[]reflect.Type{reflect.TypeOf(Unrepresentable{})},
},
{
[]string{`package a; const f float64 = "foo"`},
[]reflect.Type{reflect.TypeOf(Unrepresentable{})},
},
{
[]string{`package a; const c complex128 = true`},
[]reflect.Type{reflect.TypeOf(Unrepresentable{})},
},
{
[]string{`package a; const s string = 'a'`},
[]reflect.Type{reflect.TypeOf(Unrepresentable{})},
},
{
[]string{`package a; const r rune = ""`},
[]reflect.Type{reflect.TypeOf(Unrepresentable{})},
},
{
[]string{`package a; const b bool = "hi"`},
[]reflect.Type{reflect.TypeOf(Unrepresentable{})},
},
{
[]string{`package a; const b bool = 0`},
[]reflect.Type{reflect.TypeOf(Unrepresentable{})},
},
{
[]string{`package a; const i uint8 = 256`},
[]reflect.Type{reflect.TypeOf(Unrepresentable{})},
},
{
[]string{`package a; const a uint8 = 0; const b int8 = a`},
[]reflect.Type{reflect.TypeOf(BadAssign{})},
},
{
[]string{`package a; const c undeclared = 256`},
[]reflect.Type{reflect.TypeOf(Undeclared{})},
},
{
// Report multiple errors.
[]string{
`package a
const c undeclared = 256
const d uint8 = 256`,
},
[]reflect.Type{
reflect.TypeOf(Undeclared{}),
reflect.TypeOf(Unrepresentable{}),
},
},
{
// Don't repeat errors.
[]string{
`package a
const c = undeclared
const d = c
const e = c
const f = c`,
},
[]reflect.Type{
reflect.TypeOf(Undeclared{}),
},
},
// UnaryOps
{[]string{`package a; const a float64 = +256`}, []reflect.Type{}},
{[]string{`package a; const a float64 = -256`}, []reflect.Type{}},
{[]string{`package a; const a float64 = ^256`}, []reflect.Type{}},
{[]string{`package a; const a float64 = 1; const b = -a`}, []reflect.Type{}},
{[]string{`package a; const a complex128 = 1; const b = -a`}, []reflect.Type{}},
{[]string{`package a; const t bool = true; const f = !t`}, []reflect.Type{}},
{
[]string{`package a; const a uint = -undeclared`},
[]reflect.Type{reflect.TypeOf(Undeclared{})},
},
{
[]string{`package a; const a uint = +"hello"`},
[]reflect.Type{reflect.TypeOf(InvalidOperation{})},
},
{
[]string{`package a; const a uint = -"hello"`},
[]reflect.Type{reflect.TypeOf(InvalidOperation{})},
},
{
[]string{`package a; const a uint = !0`},
[]reflect.Type{reflect.TypeOf(InvalidOperation{})},
},
{
[]string{`package a; const a uint = ^1.0`},
[]reflect.Type{reflect.TypeOf(InvalidOperation{})},
},
{
[]string{`package a; const a uint = ^1.1`},
[]reflect.Type{reflect.TypeOf(InvalidOperation{})},
},
{
[]string{`package a; const a uint = -1`},
[]reflect.Type{reflect.TypeOf(Unrepresentable{})},
},
{
[]string{`package a; const a, b uint = 1, -a`},
[]reflect.Type{reflect.TypeOf(Unrepresentable{})},
},
{
[]string{`package a; const a uint = -1.0i`},
[]reflect.Type{reflect.TypeOf(Unrepresentable{})},
},
{
[]string{`package a; const a uint8 = +256`},
[]reflect.Type{reflect.TypeOf(Unrepresentable{})},
},
{
[]string{
`package a
const a string = "hello"
const b int = -a`,
},
[]reflect.Type{reflect.TypeOf(InvalidOperation{})},
},
{
[]string{
`package a
const a float64 = 1.1
const b complex128 = 1.1i
const c, d int = ^a, ^b`,
},
[]reflect.Type{
reflect.TypeOf(InvalidOperation{}),
reflect.TypeOf(InvalidOperation{}),
},
},
{
[]string{`package a; const i int = 1; const f = !i`},
[]reflect.Type{reflect.TypeOf(InvalidOperation{})},
},
{
[]string{`package a; const c = nil`},
[]reflect.Type{reflect.TypeOf(NotConstant{})},
},
// Types
{[]string{`package a; type T int`}, []reflect.Type{}},
{
[]string{`package a; type T undeclared`},
[]reflect.Type{reflect.TypeOf(Undeclared{})},
},
{[]string{`package a; type T int`}, []reflect.Type{}},
{
[]string{`package a; type T undeclared0.undeclared1`},
[]reflect.Type{
reflect.TypeOf(Undeclared{}),
reflect.TypeOf(Undeclared{}),
},
},
{
[]string{`package a; type T [5]int`},
[]reflect.Type{},
},
{
[]string{`package a; type T [1.0]int`},
[]reflect.Type{},
},
{
[]string{`package a; type T ["hello"]int`},
[]reflect.Type{reflect.TypeOf(BadArraySize{})},
},
{
// Too big for 64 bits, surely too big for an int.
[]string{`package a; type T [18446744073709551616]int`},
[]reflect.Type{reflect.TypeOf(BadArraySize{})},
},
{
[]string{`package a; type T [-1]int`},
[]reflect.Type{reflect.TypeOf(BadArraySize{})},
},
{
[]string{`package a; type T [1.1]int`},
[]reflect.Type{reflect.TypeOf(BadArraySize{})},
},
{
[]string{`package a; type T [^1]int`},
[]reflect.Type{reflect.TypeOf(BadArraySize{})},
},
{
[]string{`package a; const c = 5; type T [c]int`},
[]reflect.Type{},
},
{
[]string{`package a; const c = 5; type T [-1]undeclared`},
[]reflect.Type{
reflect.TypeOf(BadArraySize{}),
reflect.TypeOf(Undeclared{}),
},
},
{
// Don't report both BadArraySize and Undeclared.
[]string{`package a; const c = 5; type T [undeclared]undeclared`},
[]reflect.Type{
reflect.TypeOf(Undeclared{}),
reflect.TypeOf(Undeclared{}),
},
},
{
[]string{`package a; type T [undeclared]int`},
[]reflect.Type{reflect.TypeOf(Undeclared{})},
},
{
[]string{`package a; type T []int`},
[]reflect.Type{},
},
{
[]string{`package a; type T []undeclared`},
[]reflect.Type{reflect.TypeOf(Undeclared{})},
},
{
[]string{`package a; type T [][3][]int`},
[]reflect.Type{},
},
{
[]string{`package a; type T *int`},
[]reflect.Type{},
},
{
[]string{`package a; type T ***[5]int`},
[]reflect.Type{},
},
{
[]string{`package a; type T *undeclared`},
[]reflect.Type{reflect.TypeOf(Undeclared{})},
},
{
[]string{`package a; type T map[string]int`},
[]reflect.Type{},
},
{
[]string{`package a; type T map[string]map[string]int`},
[]reflect.Type{},
},
{
[]string{`package a; type T map[map[string]int]undeclared`},
[]reflect.Type{
reflect.TypeOf(BadMapKey{}),
reflect.TypeOf(Undeclared{}),
},
},
{
// Don't report both BadMapKey and Undeclared.
[]string{`package a; type T map[map[undeclared]int]undeclared`},
[]reflect.Type{
reflect.TypeOf(Undeclared{}),
reflect.TypeOf(Undeclared{}),
},
},
{
[]string{`package a; type T map[undefined]int`},
[]reflect.Type{reflect.TypeOf(Undeclared{})},
},
{
[]string{`package a; type T map[string]undefined`},
[]reflect.Type{reflect.TypeOf(Undeclared{})},
},
{
[]string{`package a; type T map[map[string]int]int`},
[]reflect.Type{reflect.TypeOf(BadMapKey{})},
},
{
[]string{`
package a
type (
T chan int
U chan <- int
V <-chan int
)`,
},
[]reflect.Type{},
},
{
[]string{`package a; type T chan undeclared`},
[]reflect.Type{reflect.TypeOf(Undeclared{})},
},
// Recursive Types
{
[]string{`package a; type T T`},
[]reflect.Type{reflect.TypeOf(BadRecursiveType{})},
},
{
[]string{`package a; type T U; type U T`},
[]reflect.Type{reflect.TypeOf(BadRecursiveType{})},
},
{
[]string{`package a; type T U; type U V; type V T`},
[]reflect.Type{reflect.TypeOf(BadRecursiveType{})},
},
{
[]string{`package a; type T [5]T`},
[]reflect.Type{reflect.TypeOf(BadRecursiveType{})},
},
{
[]string{`package a; type T [5][6][7]T`},
[]reflect.Type{reflect.TypeOf(BadRecursiveType{})},
},
{
[]string{`package a; type T U; type U V; type V [1]T`},
[]reflect.Type{reflect.TypeOf(BadRecursiveType{})},
},
{
[]string{`package a; type T []T`},
[]reflect.Type{},
},
{
[]string{`package a; type T [][5]T`},
[]reflect.Type{},
},
{
[]string{`package a; type T U; type U V; type V []T`},
[]reflect.Type{},
},
{
[]string{`package a; type T *T`},
[]reflect.Type{},
},
{
[]string{`package a; type T U; type U V; type V *T`},
[]reflect.Type{},
},
{
[]string{`package a; type T map[T]int`},
[]reflect.Type{reflect.TypeOf(BadMapKey{})},
},
{
[]string{`package a; type T map[string]T`},
[]reflect.Type{},
},
{
[]string{`package a; type T chan T`},
[]reflect.Type{},
},
}
for _, test := range tests {
want := make(map[reflect.Type]int)
for _, e := range test.errs {
want[e]++
}
var files []*File
for _, src := range test.src {
l := token.NewLexer("", src)
p := NewParser(l)
files = append(files, parseFile(p))
}
var got []reflect.Type
if err := Check(files); err != nil {
for _, e := range err.(errors).All() {
t := reflect.TypeOf(e)
want[t]--
if want[t] == 0 {
delete(want, t)
}
got = append(got, t)
}
}
if len(want) != 0 {
t.Errorf("Check(%v)=%v, want %v", test.src, got, test.errs)
}
}
}
// BUG(eaburns): Test NilLiteral, BoolLiteral, and ComplexLiteral.
func TestExpressionSource(t *testing.T) {
tests := []struct{ expr, want string }{
{`"Hello, World!"`, `"Hello, World!"`},
{`"αβξ"`, `"αβξ"`},
{"\x60\\n\x0a\\n\x60", `"\\n\n\\n"`},
{`'a'`, `'a'`},
{`'☺'`, `'☺'`},
{`0`, `0`},
{`5`, `5`},
{`0.0`, `0.0`},
{`5.0`, `5.0`},
{`3.1415926535`, `3.1415926535`},
{`1e4`, `10000.0`},
{`1e-4`, `0.0001`},
// BUG(eaburns): ComplexLiteral tests don't test ComplexLiterals with a
// real component, since they are never returned by the parser.
{`0i`, `0.0i`},
{`5i`, `5.0i`},
{`3.1415926535i`, `3.1415926535i`},
{`a`, `a`},
{`abc_xyz`, `abc_xyz`},
{`-1`, `-1`},
{`+-1`, `+-1`},
{`<-abc_xyz`, `<-abc_xyz`},
{`**a`, `**a`},
{`1 + 1`, `1 + 1`},
{`1 * abc`, `1 * abc`},
{`-x / *b`, `-x / *b`},
{`a + b / c + d`, `a + b / c + d`},
{`(a + b) / (c + d)`, `(a + b) / (c + d)`},
{`a()`, `a()`},
{`a(b, c)`, `a(b, c)`},
{`a(b, c...)`, `a(b, c...)`},
{`*a(b, (c + d) / e)`, `*a(b, (c + d) / e)`},
{`(*int32)(4)`, `(*int32)(4)`},
{`a.b.c`, `a.b.c`},
{`a(b, c).d`, `a(b, c).d`},
{`-a(b, c).d + 12`, `-a(b, c).d + 12`},
{`a.(b)`, `a.(b)`},
{`a().(b.c).(e)`, `a().(b.c).(e)`},
{`a[:]`, `a[:]`},
{`a[1:]`, `a[1:]`},
{`a[:2]`, `a[:2]`},
{`a[1:2]`, `a[1:2]`},
{`a[1:2:3]`, `a[1:2:3]`},
{`a[:len(a) - 1]`, `a[:len(a) - 1]`},
{`a[0]`, `a[0]`},
{`a[len(a) - 1]`, `a[len(a) - 1]`},
{`point{a, b}`, `point{a, b}`},
{`point{x: a, y: b}`, `point{x: a, y: b}`},
{`(*point){x: a, y: b}`, `(*point){x: a, y: b}`},
{`[]int`, `[]int`},
{`[][]int32{}`, `[][]int32{}`},
{`[2]float64`, `[2]float64`},
{`[...]float64{0, 0}`, `[...]float64{0, 0}`},
{`map[string]int`, `map[string]int`},
{`map[string]*[]float64`, `map[string]*[]float64`},
{`chan int`, `chan int`},
{`<-chan int`, `<-chan int`},
{`chan<- int`, `chan<- int`},
{`chan<- <-chan int`, `chan<- <-chan int`},
{`func(){}`, `func(){…}`},
{`func(int){}`, `func(int){…}`},
{`func(int)bool{}`, `func(int)bool{…}`},
{`func(int, float64){}`, `func(int, float64){…}`},
{`func()(int, int){}`, `func()(int, int){…}`},
{`func(int, ...float64)(int, int){}`, `func(int, ...float64)(int, int){…}`},
{`func(x, y int)(z int){}`, `func(x int, y int)(z int){…}`},
{`func(x, y ...int)(z int, err error){}`, `func(x int, y ...int)(z int, err error){…}`},
{`struct{ x, y int }{}`, `struct{…}{}`},
{`interface{ x(); y(int)bool }{}`, `interface{…}{}`},
}
for _, test := range tests {
l := token.NewLexer("", test.expr)
p := NewParser(l)
e := parseExpr(p)
got := e.Source()
if test.want != got {
t.Errorf("(%s).Source()=[%s], want [%s]", test.expr, got, test.want)
}
}
// These can't be tested above, because the parser never returns them.
var zero big.Rat
nodeTests := []struct {
expr Expression
want string
}{
{&NilLiteral{}, "nil"},
{&BoolLiteral{}, "false"},
{&BoolLiteral{Value: true}, "true"},
{&ComplexLiteral{Real: &zero, Imaginary: &zero}, "0.0i"},
{&ComplexLiteral{Real: &zero, Imaginary: big.NewRat(5, 1)}, "5.0i"},
{&ComplexLiteral{Real: big.NewRat(5, 1), Imaginary: &zero}, "5.0+0.0i"},
{&ComplexLiteral{Real: big.NewRat(5, 1), Imaginary: big.NewRat(5, 1)}, "5.0+5.0i"},
{&ComplexLiteral{Real: big.NewRat(5, 1), Imaginary: big.NewRat(-5, 1)}, "5.0-5.0i"},
{&ComplexLiteral{Real: big.NewRat(-5, 1), Imaginary: big.NewRat(-5, 1)}, "-5.0-5.0i"},
}
for _, test := range nodeTests {
got := test.expr.Source()
if got != test.want {
t.Errorf("(%s).Source()=[%s], want [%s]", pretty.String(test.expr), got, test.want)
}
}
}