mirror of
https://github.com/golang/go
synced 2024-09-06 00:19:45 +00:00
![Robert Griesemer](/assets/img/avatar_default.png)
This change accepts the 'i' suffix on binary and octal integer literals as well as hexadecimal floats. The suffix was already accepted on decimal integers and floats. Note that 0123i == 123i for backward-compatibility (and 09i is valid). See also the respective language in the spec change: https://golang.org/cl/161098 Change-Id: I9d2d755cba36a3fa7b9e24308c73754d4568daaf Reviewed-on: https://go-review.googlesource.com/c/162878 Run-TryBot: Robert Griesemer <gri@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
91 lines
2.2 KiB
Go
91 lines
2.2 KiB
Go
// run
|
|
|
|
// Copyright 2019 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 Go2 literal syntax for basic types.
|
|
// Avoid running gofmt on this file to preserve the
|
|
// test cases with upper-case prefixes (0B, 0O, 0X).
|
|
|
|
package main
|
|
|
|
import "fmt"
|
|
|
|
func assert(cond bool) {
|
|
if !cond {
|
|
panic("assertion failed")
|
|
}
|
|
}
|
|
|
|
func equal(x, y interface{}) bool {
|
|
if x != y {
|
|
fmt.Printf("%g != %g\n", x, y)
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
func main() {
|
|
// 0-octals
|
|
assert(0_1 == 01)
|
|
assert(012 == 012)
|
|
assert(0_1_2 == 012)
|
|
assert(0_1_2i == complex(0, 12)) // decimal digits despite leading 0 for backward-compatibility
|
|
assert(00089i == complex(0, 89)) // decimal digits despite leading 0 for backward-compatibility
|
|
|
|
// decimals
|
|
assert(1_000_000 == 1000000)
|
|
assert(1_000i == complex(0, 1000))
|
|
|
|
// hexadecimals
|
|
assert(0x_1 == 0x1)
|
|
assert(0x1_2 == 0x12)
|
|
assert(0x_cafe_f00d == 0xcafef00d)
|
|
assert(0x_cafei == complex(0, 0xcafe))
|
|
|
|
// octals
|
|
assert(0o_1 == 01)
|
|
assert(0o12 == 012)
|
|
assert(0o_1_2 == 012)
|
|
assert(0o_1_2i == complex(0, 0o12))
|
|
|
|
// binaries
|
|
assert(0b_1 == 1)
|
|
assert(0b10 == 2)
|
|
assert(0b_1_0 == 2)
|
|
assert(0b_1_0i == complex(0, 2))
|
|
|
|
// decimal floats
|
|
assert(0. == 0.0)
|
|
assert(.0 == 0.0)
|
|
assert(1_0. == 10.0)
|
|
assert(.0_1 == 0.01)
|
|
assert(1_0.0_1 == 10.01)
|
|
assert(1_0.0_1i == complex(0, 10.01))
|
|
|
|
assert(0.e1_0 == 0.0e10)
|
|
assert(.0e1_0 == 0.0e10)
|
|
assert(1_0.e1_0 == 10.0e10)
|
|
assert(.0_1e1_0 == 0.01e10)
|
|
assert(1_0.0_1e1_0 == 10.01e10)
|
|
assert(1_0.0_1e1_0i == complex(0, 10.01e10))
|
|
|
|
// hexadecimal floats
|
|
assert(equal(0x1p-2, 0.25))
|
|
assert(equal(0x2.p10, 2048.0))
|
|
assert(equal(0x1.Fp+0, 1.9375))
|
|
assert(equal(0x.8p-0, 0.5))
|
|
assert(equal(0x1FFFp-16, 0.1249847412109375))
|
|
assert(equal(0x1.fffffffffffffp1023, 1.7976931348623157e308))
|
|
assert(equal(0x1.fffffffffffffp1023i, complex(0, 1.7976931348623157e308)))
|
|
|
|
assert(equal(0x_1p-2, 0.25))
|
|
assert(equal(0x2.p1_0, 2048.0))
|
|
assert(equal(0x1_0.Fp+0, 16.9375))
|
|
assert(equal(0x_0.8p-0, 0.5))
|
|
assert(equal(0x_1FF_Fp-16, 0.1249847412109375))
|
|
assert(equal(0x1.f_ffff_ffff_ffffp1_023, 1.7976931348623157e308))
|
|
assert(equal(0x1.f_ffff_ffff_ffffp1_023i, complex(0, 1.7976931348623157e308)))
|
|
}
|