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Source file test/literal.go

Documentation: test

  // run
  
  // Copyright 2009 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 literal syntax for basic types.
  
  package main
  
  var nbad int
  
  func assert(cond bool, msg string) {
  	if !cond {
  		if nbad == 0 {
  			print("BUG")
  		}
  		nbad++
  		print(" ", msg)
  	}
  }
  
  func equal(a, b float32) bool {
  	return a == b
  }
  
  func main() {
  	// bool
  	var t bool = true
  	var f bool = false
  	assert(t == !f, "bool")
  
  	// int8
  	var i00 int8 = 0
  	var i01 int8 = 1
  	var i02 int8 = -1
  	var i03 int8 = 127
  	var i04 int8 = -127
  	var i05 int8 = -128
  	var i06 int8 = +127
  	assert(i01 == i00+1, "i01")
  	assert(i02 == -i01, "i02")
  	assert(i03 == -i04, "i03")
  	assert(-(i05+1) == i06, "i05")
  
  	// int16
  	var i10 int16 = 0
  	var i11 int16 = 1
  	var i12 int16 = -1
  	var i13 int16 = 32767
  	var i14 int16 = -32767
  	var i15 int16 = -32768
  	var i16 int16 = +32767
  	assert(i11 == i10+1, "i11")
  	assert(i12 == -i11, "i12")
  	assert(i13 == -i14, "i13")
  	assert(-(i15+1) == i16, "i15")
  
  	// int32
  	var i20 int32 = 0
  	var i21 int32 = 1
  	var i22 int32 = -1
  	var i23 int32 = 2147483647
  	var i24 int32 = -2147483647
  	var i25 int32 = -2147483648
  	var i26 int32 = +2147483647
  	assert(i21 == i20+1, "i21")
  	assert(i22 == -i21, "i22")
  	assert(i23 == -i24, "i23")
  	assert(-(i25+1) == i26, "i25")
  	assert(i23 == (1<<31)-1, "i23 size")
  
  	// int64
  	var i30 int64 = 0
  	var i31 int64 = 1
  	var i32 int64 = -1
  	var i33 int64 = 9223372036854775807
  	var i34 int64 = -9223372036854775807
  	var i35 int64 = -9223372036854775808
  	var i36 int64 = +9223372036854775807
  	assert(i31 == i30+1, "i31")
  	assert(i32 == -i31, "i32")
  	assert(i33 == -i34, "i33")
  	assert(-(i35+1) == i36, "i35")
  	assert(i33 == (1<<63)-1, "i33 size")
  
  	// uint8
  	var u00 uint8 = 0
  	var u01 uint8 = 1
  	var u02 uint8 = 255
  	var u03 uint8 = +255
  	assert(u01 == u00+1, "u01")
  	assert(u02 == u03, "u02")
  	assert(u03 == (1<<8)-1, "u03 size")
  
  	// uint16
  	var u10 uint16 = 0
  	var u11 uint16 = 1
  	var u12 uint16 = 65535
  	var u13 uint16 = +65535
  	assert(u11 == u10+1, "u11")
  	assert(u12 == u13, "u12")
  
  	// uint32
  	var u20 uint32 = 0
  	var u21 uint32 = 1
  	var u22 uint32 = 4294967295
  	var u23 uint32 = +4294967295
  	assert(u21 == u20+1, "u21")
  	assert(u22 == u23, "u22")
  
  	// uint64
  	var u30 uint64 = 0
  	var u31 uint64 = 1
  	var u32 uint64 = 18446744073709551615
  	var u33 uint64 = +18446744073709551615
  	_, _, _, _ = u30, u31, u32, u33
  
  	// float
  	var f00 float32 = 3.14159
  	var f01 float32 = -3.14159
  	var f02 float32 = +3.14159
  	var f03 float32 = 0.0
  	var f04 float32 = .0
  	var f05 float32 = 0.
  	var f06 float32 = -0.0
  	var f07 float32 = 1e10
  	var f08 float32 = -1e10
  	var f09 float32 = 1e-10
  	var f10 float32 = 1e+10
  	var f11 float32 = 1.e-10
  	var f12 float32 = 1.e+10
  	var f13 float32 = .1e-10
  	var f14 float32 = .1e+10
  	var f15 float32 = 1.1e-10
  	var f16 float32 = 1.1e+10
  	assert(f01 == -f00, "f01")
  	assert(f02 == -f01, "f02")
  	assert(f03 == f04, "f03")
  	assert(f04 == f05, "f04")
  	assert(f05 == f06, "f05")
  	assert(f07 == -f08, "f07")
  	assert(equal(f09, 1/f10), "f09")
  	assert(f11 == f09, "f11")
  	assert(f12 == f10, "f12")
  	assert(equal(f13, f09/10.0), "f13")
  	assert(equal(f14, f12/10.0), "f14")
  	assert(equal(f15, f16/1e20), "f15")
  
  	// character
  	var c0 uint8 = 'a'
  	var c1 uint8 = 'ä'
  	var c2 uint8 = '\a'
  	var c3 uint8 = '\b'
  	var c4 uint8 = '\f'
  	var c5 uint8 = '\n'
  	var c6 uint8 = '\r'
  	var c7 uint8 = '\t'
  	var c8 uint8 = '\v'
  	// var c9 uint8 = '本' // correctly caught as error
  	var c9 uint16 = '本'
  	assert(c0 == 0x61, "c0")
  	assert(c1 == 0xe4, "c1")
  	assert(c2 == 0x07, "c2")
  	assert(c3 == 0x08, "c3")
  	assert(c4 == 0x0c, "c4")
  	assert(c5 == 0x0a, "c4")
  	assert(c6 == 0x0d, "c6")
  	assert(c7 == 0x09, "c7")
  	assert(c8 == 0x0b, "c8")
  	assert(c9 == 0x672c, "c9")
  
  	var c00 uint8 = '\000'
  	var c01 uint8 = '\007'
  	var c02 uint8 = '\177'
  	var c03 uint8 = '\377'
  	assert(c00 == 0, "c00")
  	assert(c01 == 7, "c01")
  	assert(c02 == 127, "c02")
  	assert(c03 == 255, "c03")
  
  	var cx0 uint8 = '\x00'
  	var cx1 uint8 = '\x0f'
  	var cx2 uint8 = '\xff'
  	assert(cx0 == 0, "cx0")
  	assert(cx1 == 15, "cx1")
  	assert(cx2 == 255, "cx2")
  
  	var cu0 uint16 = '\u1234'
  	var cu1 uint32 = '\U00101234'
  	assert(cu0 == 0x1234, "cu0")
  	assert(cu1 == 0x101234, "cu1")
  
  	// string
  	var s0 string = ""
  	var s1 string = "hellô"
  	assert(s1[0] == 'h', "s1-0")
  	assert(s1[4] == 0xc3, "s1-4")
  	assert(s1[5] == 0xb4, "s1-5")
  	var s2 string = "\a\b\f\n\r\t\v"
  	_, _ = s0, s2
  
  	var s00 string = "\000"
  	var s01 string = "\007"
  	var s02 string = "\377"
  	assert(s00[0] == 0, "s00")
  	assert(s01[0] == 7, "s01")
  	assert(s02[0] == 255, "s02")
  
  	var x00 string = "\x00"
  	var x01 string = "\x0f"
  	var x02 string = "\xff"
  	assert(x00[0] == 0, "x00")
  	assert(x01[0] == 15, "x01")
  	assert(x02[0] == 255, "x02")
  
  	// these are all the same string
  	var sj0 string = "日本語"
  	var sj1 string = "\u65e5\u672c\u8a9e"
  	var sj2 string = "\U000065e5\U0000672c\U00008a9e"
  	var sj3 string = "\xe6\x97\xa5\xe6\x9c\xac\xe8\xaa\x9e"
  	assert(sj0 == sj1, "sj1")
  	assert(sj0 == sj2, "sj2")
  	assert(sj0 == sj3, "sj3")
  
  	if nbad > 0 {
  		panic("literal failed")
  	}
  }
  

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