Source file src/golang.org/x/tools/go/ssa/interp/testdata/width32.go

Documentation: golang.org/x/tools/go/ssa/interp/testdata

     1  // Copyright 2022 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // Test interpretation on 32 bit widths.
     6  
     7  package main
     8  
     9  func main() {
    10  	mapSize()
    11  }
    12  
    13  func mapSize() {
    14  	// Tests for the size argument of make on a map type.
    15  	const tooBigFor32 = 1<<33 - 1
    16  	wantPanic(
    17  		func() {
    18  			_ = make(map[int]int, int64(tooBigFor32))
    19  		},
    20  		"runtime error: ssa.MakeMap.Reserve value 8589934591 does not fit in int",
    21  	)
    22  
    23  	// TODO: Enable the following if sizeof(int) can be different for host and target.
    24  	// _ = make(map[int]int, tooBigFor32)
    25  	//
    26  	// Second arg to make in `make(map[int]int, tooBigFor32)` is an untyped int and
    27  	// is converted into an int explicitly in ssa.
    28  	// This has a different value on 32 and 64 bit systems.
    29  }
    30  
    31  func wantPanic(fn func(), s string) {
    32  	defer func() {
    33  		err := recover()
    34  		if err == nil {
    35  			panic("expected panic")
    36  		}
    37  		if got := err.(error).Error(); got != s {
    38  			panic("expected panic " + s + " got " + got)
    39  		}
    40  	}()
    41  	fn()
    42  }
    43  

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