// Copyright 2009 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. // This file contains test cases for short valid and invalid programs. package parser import "testing" var valids = []string{ "package p\n", `package p;`, `package p; import "fmt"; func f() { fmt.Println("Hello, World!") };`, `package p; func f() { if f(T{}) {} };`, `package p; func f() { _ = <-chan int(nil) };`, `package p; func f() { _ = (<-chan int)(nil) };`, `package p; func f() { _ = (<-chan <-chan int)(nil) };`, `package p; func f() { _ = <-chan <-chan <-chan <-chan <-int(nil) };`, `package p; func f(func() func() func());`, `package p; func f(...T);`, `package p; func f(float, ...int);`, `package p; func f(x int, a ...int) { f(0, a...); f(1, a...,) };`, `package p; func f(int,) {};`, `package p; func f(...int,) {};`, `package p; func f(x ...int,) {};`, `package p; type T []int; var a []bool; func f() { if a[T{42}[0]] {} };`, `package p; type T []int; func g(int) bool { return true }; func f() { if g(T{42}[0]) {} };`, `package p; type T []int; func f() { for _ = range []int{T{42}[0]} {} };`, `package p; var a = T{{1, 2}, {3, 4}}`, `package p; func f() { select { case <- c: case c <- d: case c <- <- d: case <-c <- d: } };`, `package p; func f() { select { case x := (<-c): } };`, `package p; func f() { if ; true {} };`, `package p; func f() { switch ; {} };`, `package p; func f() { for _ = range "foo" + "bar" {} };`, `package p; func f() { var s []int; g(s[:], s[i:], s[:j], s[i:j], s[i:j:k], s[:j:k]) };`, `package p; var ( _ = (struct {*T}).m; _ = (interface {T}).m )`, `package p; func ((T),) m() {}`, `package p; func ((*T),) m() {}`, `package p; func (*(T),) m() {}`, `package p; func _(x []int) { for range x {} }`, `package p; func _() { if [T{}.n]int{} {} }`, `package p; func _() { map[int]int{}[0]++; map[int]int{}[0] += 1 }`, `package p; func _(x interface{f()}) { interface{f()}(x).f() }`, `package p; func _(x chan int) { chan int(x) <- 0 }`, `package p; const (x = 0; y; z)`, // issue 9639 `package p; var _ = map[P]int{P{}:0, {}:1}`, `package p; var _ = map[*P]int{&P{}:0, {}:1}`, `package p; type T = int`, `package p; type (T = p.T; _ = struct{}; x = *T)`, } func TestValid(t *testing.T) { for _, src := range valids { checkErrors(t, src, src) } } var invalids = []string{ `foo /* ERROR "expected 'package'" */ !`, `package p; func f() { if { /* ERROR "missing condition" */ } };`, `package p; func f() { if ; /* ERROR "missing condition" */ {} };`, `package p; func f() { if f(); /* ERROR "missing condition" */ {} };`, `package p; func f() { if _ = range /* ERROR "expected operand" */ x; true {} };`, `package p; func f() { switch _ /* ERROR "expected switch expression" */ = range x; true {} };`, `package p; func f() { for _ = range x ; /* ERROR "expected '{'" */ ; {} };`, `package p; func f() { for ; ; _ = range /* ERROR "expected operand" */ x {} };`, `package p; func f() { for ; _ /* ERROR "expected boolean or range expression" */ = range x ; {} };`, `package p; func f() { switch t = /* ERROR "expected ':=', found '='" */ t.(type) {} };`, `package p; func f() { switch t /* ERROR "expected switch expression" */ , t = t.(type) {} };`, `package p; func f() { switch t /* ERROR "expected switch expression" */ = t.(type), t {} };`, `package p; var a = [ /* ERROR "expected expression" */ 1]int;`, `package p; var a = [ /* ERROR "expected expression" */ ...]int;`, `package p; var a = struct /* ERROR "expected expression" */ {}`, `package p; var a = func /* ERROR "expected expression" */ ();`, `package p; var a = interface /* ERROR "expected expression" */ {}`, `package p; var a = [ /* ERROR "expected expression" */ ]int`, `package p; var a = map /* ERROR "expected expression" */ [int]int`, `package p; var a = chan /* ERROR "expected expression" */ int;`, `package p; var a = []int{[ /* ERROR "expected expression" */ ]int};`, `package p; var a = ( /* ERROR "expected expression" */ []int);`, `package p; var a = a[[ /* ERROR "expected expression" */ ]int:[]int];`, `package p; var a = <- /* ERROR "expected expression" */ chan int;`, `package p; func f() { select { case _ <- chan /* ERROR "expected expression" */ int: } };`, `package p; func f() { _ = (<-<- /* ERROR "expected 'chan'" */ chan int)(nil) };`, `package p; func f() { _ = (<-chan<-chan<-chan<-chan<-chan<- /* ERROR "expected channel type" */ int)(nil) };`, `package p; func f() { var t []int; t /* ERROR "expected identifier on left side of :=" */ [0] := 0 };`, `package p; func f() { if x := g(); x /* ERROR "expected boolean expression" */ = 0 {}};`, `package p; func f() { _ = x = /* ERROR "expected '=='" */ 0 {}};`, `package p; func f() { _ = 1 == func()int { var x bool; x = x = /* ERROR "expected '=='" */ true; return x }() };`, `package p; func f() { var s []int; _ = s[] /* ERROR "expected operand" */ };`, `package p; func f() { var s []int; _ = s[i:j: /* ERROR "3rd index required" */ ] };`, `package p; func f() { var s []int; _ = s[i: /* ERROR "2nd index required" */ :k] };`, `package p; func f() { var s []int; _ = s[i: /* ERROR "2nd index required" */ :] };`, `package p; func f() { var s []int; _ = s[: /* ERROR "2nd index required" */ :] };`, `package p; func f() { var s []int; _ = s[: /* ERROR "2nd index required" */ ::] };`, `package p; func f() { var s []int; _ = s[i:j:k: /* ERROR "expected ']'" */ l] };`, `package p; func f() { for x /* ERROR "boolean or range expression" */ = []string {} }`, `package p; func f() { for x /* ERROR "boolean or range expression" */ := []string {} }`, `package p; func f() { for i /* ERROR "boolean or range expression" */ , x = []string {} }`, `package p; func f() { for i /* ERROR "boolean or range expression" */ , x := []string {} }`, `package p; func f() { go f /* ERROR HERE "function must be invoked" */ }`, `package p; func f() { defer func() {} /* ERROR HERE "function must be invoked" */ }`, `package p; func f() { go func() { func() { f(x func /* ERROR "missing ','" */ (){}) } } }`, `package p; func f(x func(), u v func /* ERROR "missing ','" */ ()){}`, // issue 8656 `package p; func f() (a b string /* ERROR "missing ','" */ , ok bool)`, // issue 9639 `package p; var x /* ERROR "missing variable type or initialization" */ , y, z;`, `package p; const x /* ERROR "missing constant value" */ ;`, `package p; const x /* ERROR "missing constant value" */ int;`, `package p; const (x = 0; y; z /* ERROR "missing constant value" */ int);`, // issue 12437 `package p; var _ = struct { x int, /* ERROR "expected ';', found ','" */ }{};`, `package p; var _ = struct { x int, /* ERROR "expected ';', found ','" */ y float }{};`, // issue 11611 `package p; type _ struct { int, } /* ERROR "expected type, found '}'" */ ;`, `package p; type _ struct { int, float } /* ERROR "expected type, found '}'" */ ;`, `package p; type _ struct { ( /* ERROR "expected anonymous field" */ int) };`, `package p; func _()(x, y, z ... /* ERROR "expected '\)', found '...'" */ int){}`, `package p; func _()(... /* ERROR "expected type, found '...'" */ int){}`, // issue 13475 `package p; func f() { if true {} else ; /* ERROR "expected if statement or block" */ }`, `package p; func f() { if true {} else defer /* ERROR "expected if statement or block" */ f() }`, } func TestInvalid(t *testing.T) { for _, src := range invalids { checkErrors(t, src, src) } }