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go/test/shift1.go
Alberto Donizetti 1737aef270 cmd/compile: more error position tests for the typechecker 
This change adds line position tests for several yyerror calls in the
typechecker that are currently not tested in any way.

Untested yyerror calls were found by replacing them with

  yerrorl(src.NoXPos, ...)

(thus destroying position information in the error), and then running
the test suite. No failures means no test coverage for the relevant
yyerror call.

For #19683

Change-Id: Iedb3d2f02141b332e9bfa76dbf5ae930ad2fddc3
Reviewed-on: https://go-review.googlesource.com/41477
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2017-04-24 12:37:49 +00:00

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// errorcheck
// 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.
// Test illegal shifts.
// Issue 1708, illegal cases.
// Does not compile.
package p
func f(x int) int { return 0 }
func g(x interface{}) int { return 0 }
func h(x float64) int { return 0 }
// from the spec
var (
s uint = 33
u = 1.0 << s // ERROR "invalid operation|shift of non-integer operand"
v float32 = 1 << s // ERROR "invalid" "as type float32"
)
// non-constant shift expressions
var (
e1 = g(2.0 << s) // ERROR "invalid|shift of non-integer operand" "as type interface"
f1 = h(2 << s) // ERROR "invalid" "as type float64"
g1 int64 = 1.1 << s // ERROR "truncated"
)
// constant shift expressions
const c uint = 65
var (
a2 int = 1.0 << c // ERROR "overflow"
b2 = 1.0 << c // ERROR "overflow"
d2 = f(1.0 << c) // ERROR "overflow"
)
var (
// issues 4882, 4936.
a3 = 1.0<<s + 0 // ERROR "invalid|shift of non-integer operand"
// issue 4937
b3 = 1<<s + 1 + 1.0 // ERROR "invalid|shift of non-integer operand"
// issue 5014
c3 = complex(1<<s, 0) // ERROR "invalid|shift of type float64"
d3 int = complex(1<<s, 3) // ERROR "non-integer|cannot use.*as type int" "shift of type float64"
e3 = real(1 << s) // ERROR "invalid"
f3 = imag(1 << s) // ERROR "invalid"
)
// from the spec
func _() {
var (
s uint = 33
i = 1 << s // 1 has type int
j int32 = 1 << s // 1 has type int32; j == 0
k = uint64(1 << s) // 1 has type uint64; k == 1<<33
m int = 1.0 << s // 1.0 has type int
n = 1.0<<s != i // 1.0 has type int; n == false if ints are 32bits in size
o = 1<<s == 2<<s // 1 and 2 have type int; o == true if ints are 32bits in size
// next test only fails on 32bit systems
// p = 1<<s == 1<<33 // illegal if ints are 32bits in size: 1 has type int, but 1<<33 overflows int
u = 1.0 << s // ERROR "non-integer|float64"
u1 = 1.0<<s != 0 // ERROR "non-integer|float64"
u2 = 1<<s != 1.0 // ERROR "non-integer|float64"
v float32 = 1 << s // ERROR "non-integer|float32"
w int64 = 1.0 << 33 // 1.0<<33 is a constant shift expression
_, _, _, _, _, _, _, _, _, _ = j, k, m, n, o, u, u1, u2, v, w
)
// non constants arguments trigger a different path
f2 := 1.2
s2 := "hi"
_ = f2 << 2 // ERROR "shift of type float64"
_ = s2 << 2 // ERROR "shift of type string"
}
// shifts in comparisons w/ untyped operands
var (
_ = 1<<s == 1
_ = 1<<s == 1. // ERROR "invalid|shift of type float64"
_ = 1.<<s == 1 // ERROR "invalid|shift of type float64"
_ = 1.<<s == 1. // ERROR "invalid|non-integer|shift of type float64"
_ = 1<<s+1 == 1
_ = 1<<s+1 == 1. // ERROR "invalid|shift of type float64"
_ = 1<<s+1. == 1 // ERROR "invalid|shift of type float64"
_ = 1<<s+1. == 1. // ERROR "invalid|shift of type float64"
_ = 1.<<s+1 == 1 // ERROR "invalid|shift of type float64"
_ = 1.<<s+1 == 1. // ERROR "invalid|shift of type float64"
_ = 1.<<s+1. == 1 // ERROR "invalid|shift of type float64"
_ = 1.<<s+1. == 1. // ERROR "invalid|non-integer|shift of type float64"
_ = 1<<s == 1<<s
_ = 1<<s == 1.<<s // ERROR "invalid|shift of type float64"
_ = 1.<<s == 1<<s // ERROR "invalid|shift of type float64"
_ = 1.<<s == 1.<<s // ERROR "invalid|non-integer|shift of type float64"
_ = 1<<s+1<<s == 1
_ = 1<<s+1<<s == 1. // ERROR "invalid|shift of type float64"
_ = 1<<s+1.<<s == 1 // ERROR "invalid|shift of type float64"
_ = 1<<s+1.<<s == 1. // ERROR "invalid|shift of type float64"
_ = 1.<<s+1<<s == 1 // ERROR "invalid|shift of type float64"
_ = 1.<<s+1<<s == 1. // ERROR "invalid|shift of type float64"
_ = 1.<<s+1.<<s == 1 // ERROR "invalid|shift of type float64"
_ = 1.<<s+1.<<s == 1. // ERROR "invalid|non-integer|shift of type float64"
_ = 1<<s+1<<s == 1<<s+1<<s
_ = 1<<s+1<<s == 1<<s+1.<<s // ERROR "invalid|shift of type float64"
_ = 1<<s+1<<s == 1.<<s+1<<s // ERROR "invalid|shift of type float64"
_ = 1<<s+1<<s == 1.<<s+1.<<s // ERROR "invalid|shift of type float64"
_ = 1<<s+1.<<s == 1<<s+1<<s // ERROR "invalid|shift of type float64"
_ = 1<<s+1.<<s == 1<<s+1.<<s // ERROR "invalid|shift of type float64"
_ = 1<<s+1.<<s == 1.<<s+1<<s // ERROR "invalid|shift of type float64"
_ = 1<<s+1.<<s == 1.<<s+1.<<s // ERROR "invalid|non-integer|shift of type float64"
_ = 1.<<s+1<<s == 1<<s+1<<s // ERROR "invalid|shift of type float64"
_ = 1.<<s+1<<s == 1<<s+1.<<s // ERROR "invalid|shift of type float64"
_ = 1.<<s+1<<s == 1.<<s+1<<s // ERROR "invalid|shift of type float64"
_ = 1.<<s+1<<s == 1.<<s+1.<<s // ERROR "invalid|non-integer|shift of type float64"
_ = 1.<<s+1.<<s == 1<<s+1<<s // ERROR "invalid|shift of type float64"
_ = 1.<<s+1.<<s == 1<<s+1.<<s // ERROR "invalid|non-integer|shift of type float64"
_ = 1.<<s+1.<<s == 1.<<s+1<<s // ERROR "invalid|non-integer|shift of type float64"
_ = 1.<<s+1.<<s == 1.<<s+1.<<s // ERROR "invalid|non-integer|shift of type float64"
)
// shifts in comparisons w/ typed operands
var (
x int
_ = 1<<s == x
_ = 1.<<s == x
_ = 1.1<<s == x // ERROR "truncated"
_ = 1<<s+x == 1
_ = 1<<s+x == 1.
_ = 1<<s+x == 1.1 // ERROR "truncated"
_ = 1.<<s+x == 1
_ = 1.<<s+x == 1.
_ = 1.<<s+x == 1.1 // ERROR "truncated"
_ = 1.1<<s+x == 1 // ERROR "truncated"
_ = 1.1<<s+x == 1. // ERROR "truncated"
_ = 1.1<<s+x == 1.1 // ERROR "truncated"
_ = 1<<s == x<<s
_ = 1.<<s == x<<s
_ = 1.1<<s == x<<s // ERROR "truncated"
)
// shifts as operands in non-arithmetic operations and as arguments
func _() {
var s uint
var a []int
_ = a[1<<s]
_ = a[1.]
// For now, the spec disallows these. We may revisit past Go 1.1.
_ = a[1.<<s] // ERROR "integer|shift of type float64"
_ = a[1.1<<s] // ERROR "integer|shift of type float64"
_ = make([]int, 1)
_ = make([]int, 1.)
_ = make([]int, 1.<<s)
_ = make([]int, 1.1<<s) // ERROR "non-integer|truncated"
_ = float32(1)
_ = float32(1 << s) // ERROR "non-integer|shift of type float32"
_ = float32(1.)
_ = float32(1. << s) // ERROR "non-integer|shift of type float32"
_ = float32(1.1 << s) // ERROR "non-integer|shift of type float32"
_ = append(a, 1<<s)
_ = append(a, 1.<<s)
_ = append(a, 1.1<<s) // ERROR "truncated"
var b []float32
_ = append(b, 1<<s) // ERROR "non-integer|type float32"
_ = append(b, 1.<<s) // ERROR "non-integer|type float32"
_ = append(b, 1.1<<s) // ERROR "non-integer|type float32"
_ = complex(1.<<s, 0) // ERROR "non-integer|shift of type float64"
_ = complex(1.1<<s, 0) // ERROR "non-integer|shift of type float64"
_ = complex(0, 1.<<s) // ERROR "non-integer|shift of type float64"
_ = complex(0, 1.1<<s) // ERROR "non-integer|shift of type float64"
var a4 float64
var b4 int
_ = complex(1<<s, a4) // ERROR "non-integer|shift of type float64"
_ = complex(1<<s, b4) // ERROR "invalid|non-integer|"
var m1 map[int]string
delete(m1, 1<<s)
delete(m1, 1.<<s)
delete(m1, 1.1<<s) // ERROR "truncated|shift of type float64"
var m2 map[float32]string
delete(m2, 1<<s) // ERROR "invalid|cannot use 1 << s as type float32"
delete(m2, 1.<<s) // ERROR "invalid|cannot use 1 << s as type float32"
delete(m2, 1.1<<s) // ERROR "invalid|cannot use 1.1 << s as type float32"
}
// shifts of shifts
func _() {
var s uint
_ = 1 << (1 << s)
_ = 1 << (1. << s)
_ = 1 << (1.1 << s) // ERROR "non-integer|truncated"
_ = 1. << (1 << s) // ERROR "non-integer|shift of type float64"
_ = 1. << (1. << s) // ERROR "non-integer|shift of type float64"
_ = 1.1 << (1.1 << s) // ERROR "invalid|non-integer|truncated"
_ = (1 << s) << (1 << s)
_ = (1 << s) << (1. << s)
_ = (1 << s) << (1.1 << s) // ERROR "truncated"
_ = (1. << s) << (1 << s) // ERROR "non-integer|shift of type float64"
_ = (1. << s) << (1. << s) // ERROR "non-integer|shift of type float64"
_ = (1.1 << s) << (1.1 << s) // ERROR "invalid|non-integer|truncated"
var x int
x = 1 << (1 << s)
x = 1 << (1. << s)
x = 1 << (1.1 << s) // ERROR "truncated"
x = 1. << (1 << s)
x = 1. << (1. << s)
x = 1.1 << (1.1 << s) // ERROR "truncated"
x = (1 << s) << (1 << s)
x = (1 << s) << (1. << s)
x = (1 << s) << (1.1 << s) // ERROR "truncated"
x = (1. << s) << (1 << s)
x = (1. << s) << (1. << s)
x = (1.1 << s) << (1.1 << s) // ERROR "truncated"
var y float32
y = 1 << (1 << s) // ERROR "non-integer|type float32"
y = 1 << (1. << s) // ERROR "non-integer|type float32"
y = 1 << (1.1 << s) // ERROR "invalid|truncated|float32"
y = 1. << (1 << s) // ERROR "non-integer|type float32"
y = 1. << (1. << s) // ERROR "non-integer|type float32"
y = 1.1 << (1.1 << s) // ERROR "invalid|truncated|float32"
var z complex128
z = (1 << s) << (1 << s) // ERROR "non-integer|type complex128"
z = (1 << s) << (1. << s) // ERROR "non-integer|type complex128"
z = (1 << s) << (1.1 << s) // ERROR "invalid|truncated|complex128"
z = (1. << s) << (1 << s) // ERROR "non-integer|type complex128"
z = (1. << s) << (1. << s) // ERROR "non-integer|type complex128"
z = (1.1 << s) << (1.1 << s) // ERROR "invalid|truncated|complex128"
_, _, _ = x, y, z
}
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