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Source file test/sinit.go

Documentation: test

  // skip
  
  // Copyright 2010 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 that many initializations can be done at link time and
  // generate no executable init functions.
  // This test is run by sinit_run.go.
  
  package p
  
  import "unsafe"
  
  // Should be no init func in the assembly.
  // All these initializations should be done at link time.
  
  type S struct{ a, b, c int }
  type SS struct{ aa, bb, cc S }
  type SA struct{ a, b, c [3]int }
  type SC struct{ a, b, c []int }
  
  var (
  	zero                      = 2
  	one                       = 1
  	pi                        = 3.14
  	slice                     = []byte{1, 2, 3}
  	sliceInt                  = []int{1, 2, 3}
  	hello                     = "hello, world"
  	bytes                     = []byte("hello, world")
  	four, five                = 4, 5
  	x, y                      = 0.1, "hello"
  	nilslice   []byte         = nil
  	nilmap     map[string]int = nil
  	nilfunc    func()         = nil
  	nilchan    chan int       = nil
  	nilptr     *byte          = nil
  )
  
  var a = [3]int{1001, 1002, 1003}
  var s = S{1101, 1102, 1103}
  var c = []int{1201, 1202, 1203}
  
  var aa = [3][3]int{[3]int{2001, 2002, 2003}, [3]int{2004, 2005, 2006}, [3]int{2007, 2008, 2009}}
  var as = [3]S{S{2101, 2102, 2103}, S{2104, 2105, 2106}, S{2107, 2108, 2109}}
  var ac = [3][]int{[]int{2201, 2202, 2203}, []int{2204, 2205, 2206}, []int{2207, 2208, 2209}}
  
  var sa = SA{[3]int{3001, 3002, 3003}, [3]int{3004, 3005, 3006}, [3]int{3007, 3008, 3009}}
  var ss = SS{S{3101, 3102, 3103}, S{3104, 3105, 3106}, S{3107, 3108, 3109}}
  var sc = SC{[]int{3201, 3202, 3203}, []int{3204, 3205, 3206}, []int{3207, 3208, 3209}}
  
  var ca = [][3]int{[3]int{4001, 4002, 4003}, [3]int{4004, 4005, 4006}, [3]int{4007, 4008, 4009}}
  var cs = []S{S{4101, 4102, 4103}, S{4104, 4105, 4106}, S{4107, 4108, 4109}}
  var cc = [][]int{[]int{4201, 4202, 4203}, []int{4204, 4205, 4206}, []int{4207, 4208, 4209}}
  
  var answers = [...]int{
  	// s
  	1101, 1102, 1103,
  
  	// ss
  	3101, 3102, 3103,
  	3104, 3105, 3106,
  	3107, 3108, 3109,
  
  	// [0]
  	1001, 1201, 1301,
  	2101, 2102, 2103,
  	4101, 4102, 4103,
  	5101, 5102, 5103,
  	3001, 3004, 3007,
  	3201, 3204, 3207,
  	3301, 3304, 3307,
  
  	// [0][j]
  	2001, 2201, 2301, 4001, 4201, 4301, 5001, 5201, 5301,
  	2002, 2202, 2302, 4002, 4202, 4302, 5002, 5202, 5302,
  	2003, 2203, 2303, 4003, 4203, 4303, 5003, 5203, 5303,
  
  	// [1]
  	1002, 1202, 1302,
  	2104, 2105, 2106,
  	4104, 4105, 4106,
  	5104, 5105, 5106,
  	3002, 3005, 3008,
  	3202, 3205, 3208,
  	3302, 3305, 3308,
  
  	// [1][j]
  	2004, 2204, 2304, 4004, 4204, 4304, 5004, 5204, 5304,
  	2005, 2205, 2305, 4005, 4205, 4305, 5005, 5205, 5305,
  	2006, 2206, 2306, 4006, 4206, 4306, 5006, 5206, 5306,
  
  	// [2]
  	1003, 1203, 1303,
  	2107, 2108, 2109,
  	4107, 4108, 4109,
  	5107, 5108, 5109,
  	3003, 3006, 3009,
  	3203, 3206, 3209,
  	3303, 3306, 3309,
  
  	// [2][j]
  	2007, 2207, 2307, 4007, 4207, 4307, 5007, 5207, 5307,
  	2008, 2208, 2308, 4008, 4208, 4308, 5008, 5208, 5308,
  	2009, 2209, 2309, 4009, 4209, 4309, 5009, 5209, 5309,
  }
  
  var (
  	copy_zero     = zero
  	copy_one      = one
  	copy_pi       = pi
  	copy_slice    = slice
  	copy_sliceInt = sliceInt
  	copy_hello    = hello
  
  	// Could be handled without an initialization function, but
  	// requires special handling for "a = []byte("..."); b = a"
  	// which is not a likely case.
  	// copy_bytes = bytes
  	// https://codereview.appspot.com/171840043 is one approach to
  	// make this special case work.
  
  	copy_four, copy_five = four, five
  	copy_x, copy_y       = x, y
  	copy_nilslice        = nilslice
  	copy_nilmap          = nilmap
  	copy_nilfunc         = nilfunc
  	copy_nilchan         = nilchan
  	copy_nilptr          = nilptr
  )
  
  var copy_a = a
  var copy_s = s
  var copy_c = c
  
  var copy_aa = aa
  var copy_as = as
  var copy_ac = ac
  
  var copy_sa = sa
  var copy_ss = ss
  var copy_sc = sc
  
  var copy_ca = ca
  var copy_cs = cs
  var copy_cc = cc
  
  var copy_answers = answers
  
  var bx bool
  var b0 = false
  var b1 = true
  
  var fx float32
  var f0 = float32(0)
  var f1 = float32(1)
  
  var gx float64
  var g0 = float64(0)
  var g1 = float64(1)
  
  var ix int
  var i0 = 0
  var i1 = 1
  
  var jx uint
  var j0 = uint(0)
  var j1 = uint(1)
  
  var cx complex64
  var c0 = complex64(0)
  var c1 = complex64(1)
  
  var dx complex128
  var d0 = complex128(0)
  var d1 = complex128(1)
  
  var sx []int
  var s0 = []int{0, 0, 0}
  var s1 = []int{1, 2, 3}
  
  func fi() int { return 1 }
  
  var ax [10]int
  var a0 = [10]int{0, 0, 0}
  var a1 = [10]int{1, 2, 3, 4}
  
  type T struct{ X, Y int }
  
  var tx T
  var t0 = T{}
  var t0a = T{0, 0}
  var t0b = T{X: 0}
  var t1 = T{X: 1, Y: 2}
  var t1a = T{3, 4}
  
  var psx *[]int
  var ps0 = &[]int{0, 0, 0}
  var ps1 = &[]int{1, 2, 3}
  
  var pax *[10]int
  var pa0 = &[10]int{0, 0, 0}
  var pa1 = &[10]int{1, 2, 3}
  
  var ptx *T
  var pt0 = &T{}
  var pt0a = &T{0, 0}
  var pt0b = &T{X: 0}
  var pt1 = &T{X: 1, Y: 2}
  var pt1a = &T{3, 4}
  
  // The checks similar to
  // var copy_bx = bx
  // are commented out.  The  compiler no longer statically initializes them.
  // See issue 7665 and https://codereview.appspot.com/93200044.
  // If https://codereview.appspot.com/169040043 is submitted, and this
  // test is changed to pass -complete to the compiler, then we can
  // uncomment the copy lines again.
  
  // var copy_bx = bx
  var copy_b0 = b0
  var copy_b1 = b1
  
  // var copy_fx = fx
  var copy_f0 = f0
  var copy_f1 = f1
  
  // var copy_gx = gx
  var copy_g0 = g0
  var copy_g1 = g1
  
  // var copy_ix = ix
  var copy_i0 = i0
  var copy_i1 = i1
  
  // var copy_jx = jx
  var copy_j0 = j0
  var copy_j1 = j1
  
  // var copy_cx = cx
  var copy_c0 = c0
  var copy_c1 = c1
  
  // var copy_dx = dx
  var copy_d0 = d0
  var copy_d1 = d1
  
  // var copy_sx = sx
  var copy_s0 = s0
  var copy_s1 = s1
  
  // var copy_ax = ax
  var copy_a0 = a0
  var copy_a1 = a1
  
  // var copy_tx = tx
  var copy_t0 = t0
  var copy_t0a = t0a
  var copy_t0b = t0b
  var copy_t1 = t1
  var copy_t1a = t1a
  
  // var copy_psx = psx
  var copy_ps0 = ps0
  var copy_ps1 = ps1
  
  // var copy_pax = pax
  var copy_pa0 = pa0
  var copy_pa1 = pa1
  
  // var copy_ptx = ptx
  var copy_pt0 = pt0
  var copy_pt0a = pt0a
  var copy_pt0b = pt0b
  var copy_pt1 = pt1
  var copy_pt1a = pt1a
  
  var _ interface{} = 1
  
  type T1 int
  
  func (t *T1) M() {}
  
  type Mer interface {
  	M()
  }
  
  var _ Mer = (*T1)(nil)
  
  var Byte byte
  var PtrByte unsafe.Pointer = unsafe.Pointer(&Byte)
  

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