Initial commit: Go 1.23 release state

test/literal2.go

@@ -0,0 +1,90 @@
+// 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)))
+}