diff options
Diffstat (limited to 'libgo/go/go/types/testdata/gotos.src')
-rw-r--r-- | libgo/go/go/types/testdata/gotos.src | 560 |
1 files changed, 560 insertions, 0 deletions
diff --git a/libgo/go/go/types/testdata/gotos.src b/libgo/go/go/types/testdata/gotos.src new file mode 100644 index 0000000000..069a94bbbf --- /dev/null +++ b/libgo/go/go/types/testdata/gotos.src @@ -0,0 +1,560 @@ +// Copyright 2011 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 is a modified copy of $GOROOT/test/goto.go. + +package gotos + +var ( + i, n int + x []int + c chan int + m map[int]int + s string +) + +// goto after declaration okay +func _() { + x := 1 + goto L +L: + _ = x +} + +// goto before declaration okay +func _() { + goto L +L: + x := 1 + _ = x +} + +// goto across declaration not okay +func _() { + goto L /* ERROR "goto L jumps over variable declaration at line 36" */ + x := 1 + _ = x +L: +} + +// goto across declaration in inner scope okay +func _() { + goto L + { + x := 1 + _ = x + } +L: +} + +// goto across declaration after inner scope not okay +func _() { + goto L /* ERROR "goto L jumps over variable declaration at line 58" */ + { + x := 1 + _ = x + } + x := 1 + _ = x +L: +} + +// goto across declaration in reverse okay +func _() { +L: + x := 1 + _ = x + goto L +} + +func _() { +L: L1: + x := 1 + _ = x + goto L + goto L1 +} + +// error shows first offending variable +func _() { + goto L /* ERROR "goto L jumps over variable declaration at line 84" */ + x := 1 + _ = x + y := 1 + _ = y +L: +} + +// goto not okay even if code path is dead +func _() { + goto L /* ERROR "goto L jumps over variable declaration" */ + x := 1 + _ = x + y := 1 + _ = y + return +L: +} + +// goto into outer block okay +func _() { + { + goto L + } +L: +} + +func _() { + { + goto L + goto L1 + } +L: L1: +} + +// goto backward into outer block okay +func _() { +L: + { + goto L + } +} + +func _() { +L: L1: + { + goto L + goto L1 + } +} + +// goto into inner block not okay +func _() { + goto L /* ERROR "goto L jumps into block" */ + { + L: + } +} + +func _() { + goto L /* ERROR "goto L jumps into block" */ + goto L1 /* ERROR "goto L1 jumps into block" */ + { + L: L1: + } +} + +// goto backward into inner block still not okay +func _() { + { + L: + } + goto L /* ERROR "goto L jumps into block" */ +} + +func _() { + { + L: L1: + } + goto L /* ERROR "goto L jumps into block" */ + goto L1 /* ERROR "goto L1 jumps into block" */ +} + +// error shows first (outermost) offending block +func _() { + goto L /* ERROR "goto L jumps into block" */ + { + { + { + L: + } + } + } +} + +// error prefers block diagnostic over declaration diagnostic +func _() { + goto L /* ERROR "goto L jumps into block" */ + x := 1 + _ = x + { + L: + } +} + +// many kinds of blocks, all invalid to jump into or among, +// but valid to jump out of + +// if + +func _() { +L: + if true { + goto L + } +} + +func _() { +L: + if true { + goto L + } else { + } +} + +func _() { +L: + if false { + } else { + goto L + } +} + +func _() { + goto L /* ERROR "goto L jumps into block" */ + if true { + L: + } +} + +func _() { + goto L /* ERROR "goto L jumps into block" */ + if true { + L: + } else { + } +} + +func _() { + goto L /* ERROR "goto L jumps into block" */ + if true { + } else { + L: + } +} + +func _() { + if false { + L: + } else { + goto L /* ERROR "goto L jumps into block" */ + } +} + +func _() { + if true { + goto L /* ERROR "goto L jumps into block" */ + } else { + L: + } +} + +func _() { + if true { + goto L /* ERROR "goto L jumps into block" */ + } else if false { + L: + } +} + +func _() { + if true { + goto L /* ERROR "goto L jumps into block" */ + } else if false { + L: + } else { + } +} + +func _() { + if true { + goto L /* ERROR "goto L jumps into block" */ + } else if false { + } else { + L: + } +} + +func _() { + if true { + goto L /* ERROR "goto L jumps into block" */ + } else { + L: + } +} + +func _() { + if true { + L: + } else { + goto L /* ERROR "goto L jumps into block" */ + } +} + +// for + +func _() { + for { + goto L + } +L: +} + +func _() { + for { + goto L + L: + } +} + +func _() { + for { + L: + } + goto L /* ERROR "goto L jumps into block" */ +} + +func _() { + for { + goto L + L1: + } +L: + goto L1 /* ERROR "goto L1 jumps into block" */ +} + +func _() { + for i < n { + L: + } + goto L /* ERROR "goto L jumps into block" */ +} + +func _() { + for i = 0; i < n; i++ { + L: + } + goto L /* ERROR "goto L jumps into block" */ +} + +func _() { + for i = range x { + L: + } + goto L /* ERROR "goto L jumps into block" */ +} + +func _() { + for i = range c { + L: + } + goto L /* ERROR "goto L jumps into block" */ +} + +func _() { + for i = range m { + L: + } + goto L /* ERROR "goto L jumps into block" */ +} + +func _() { + for i = range s { + L: + } + goto L /* ERROR "goto L jumps into block" */ +} + +// switch + +func _() { +L: + switch i { + case 0: + goto L + } +} + +func _() { +L: + switch i { + case 0: + + default: + goto L + } +} + +func _() { + switch i { + case 0: + + default: + L: + goto L + } +} + +func _() { + switch i { + case 0: + + default: + goto L + L: + } +} + +func _() { + switch i { + case 0: + goto L + L: + ; + default: + } +} + +func _() { + goto L /* ERROR "goto L jumps into block" */ + switch i { + case 0: + L: + } +} + +func _() { + goto L /* ERROR "goto L jumps into block" */ + switch i { + case 0: + L: + ; + default: + } +} + +func _() { + goto L /* ERROR "goto L jumps into block" */ + switch i { + case 0: + default: + L: + } +} + +func _() { + switch i { + default: + goto L /* ERROR "goto L jumps into block" */ + case 0: + L: + } +} + +func _() { + switch i { + case 0: + L: + ; + default: + goto L /* ERROR "goto L jumps into block" */ + } +} + +// select +// different from switch. the statement has no implicit block around it. + +func _() { +L: + select { + case <-c: + goto L + } +} + +func _() { +L: + select { + case c <- 1: + + default: + goto L + } +} + +func _() { + select { + case <-c: + + default: + L: + goto L + } +} + +func _() { + select { + case c <- 1: + + default: + goto L + L: + } +} + +func _() { + select { + case <-c: + goto L + L: + ; + default: + } +} + +func _() { + goto L /* ERROR "goto L jumps into block" */ + select { + case c <- 1: + L: + } +} + +func _() { + goto L /* ERROR "goto L jumps into block" */ + select { + case c <- 1: + L: + ; + default: + } +} + +func _() { + goto L /* ERROR "goto L jumps into block" */ + select { + case <-c: + default: + L: + } +} + +func _() { + select { + default: + goto L /* ERROR "goto L jumps into block" */ + case <-c: + L: + } +} + +func _() { + select { + case <-c: + L: + ; + default: + goto L /* ERROR "goto L jumps into block" */ + } +} |