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91 lines
2.2 KiB
91 lines
2.2 KiB
// run
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// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Test Go2 literal syntax for basic types.
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// Avoid running gofmt on this file to preserve the
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// test cases with upper-case prefixes (0B, 0O, 0X).
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package main
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import "fmt"
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func assert(cond bool) {
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if !cond {
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panic("assertion failed")
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}
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}
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func equal(x, y interface{}) bool {
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if x != y {
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fmt.Printf("%g != %g\n", x, y)
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return false
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}
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return true
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}
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func main() {
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// 0-octals
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assert(0_1 == 01)
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assert(012 == 012)
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assert(0_1_2 == 012)
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assert(0_1_2i == complex(0, 12)) // decimal digits despite leading 0 for backward-compatibility
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assert(00089i == complex(0, 89)) // decimal digits despite leading 0 for backward-compatibility
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// decimals
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assert(1_000_000 == 1000000)
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assert(1_000i == complex(0, 1000))
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// hexadecimals
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assert(0x_1 == 0x1)
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assert(0x1_2 == 0x12)
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assert(0x_cafe_f00d == 0xcafef00d)
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assert(0x_cafei == complex(0, 0xcafe))
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// octals
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assert(0o_1 == 01)
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assert(0o12 == 012)
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assert(0o_1_2 == 012)
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assert(0o_1_2i == complex(0, 0o12))
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// binaries
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assert(0b_1 == 1)
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assert(0b10 == 2)
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assert(0b_1_0 == 2)
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assert(0b_1_0i == complex(0, 2))
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// decimal floats
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assert(0. == 0.0)
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assert(.0 == 0.0)
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assert(1_0. == 10.0)
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assert(.0_1 == 0.01)
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assert(1_0.0_1 == 10.01)
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assert(1_0.0_1i == complex(0, 10.01))
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assert(0.e1_0 == 0.0e10)
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assert(.0e1_0 == 0.0e10)
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assert(1_0.e1_0 == 10.0e10)
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assert(.0_1e1_0 == 0.01e10)
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assert(1_0.0_1e1_0 == 10.01e10)
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assert(1_0.0_1e1_0i == complex(0, 10.01e10))
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// hexadecimal floats
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assert(equal(0x1p-2, 0.25))
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assert(equal(0x2.p10, 2048.0))
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assert(equal(0x1.Fp+0, 1.9375))
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assert(equal(0x.8p-0, 0.5))
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assert(equal(0x1FFFp-16, 0.1249847412109375))
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assert(equal(0x1.fffffffffffffp1023, 1.7976931348623157e308))
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assert(equal(0x1.fffffffffffffp1023i, complex(0, 1.7976931348623157e308)))
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assert(equal(0x_1p-2, 0.25))
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assert(equal(0x2.p1_0, 2048.0))
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assert(equal(0x1_0.Fp+0, 16.9375))
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assert(equal(0x_0.8p-0, 0.5))
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assert(equal(0x_1FF_Fp-16, 0.1249847412109375))
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assert(equal(0x1.f_ffff_ffff_ffffp1_023, 1.7976931348623157e308))
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assert(equal(0x1.f_ffff_ffff_ffffp1_023i, complex(0, 1.7976931348623157e308)))
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}
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