| 1 | // Copyright 2021 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 | package generator |
| 6 | |
| 7 | import ( |
| 8 | "bytes" |
| 9 | "fmt" |
| 10 | ) |
| 11 | |
| 12 | // pointerparm describes a parameter of pointer type; it implements the |
| 13 | // "parm" interface. |
| 14 | type pointerparm struct { |
| 15 | tag string |
| 16 | totype parm |
| 17 | isBlank |
| 18 | addrTakenHow |
| 19 | isGenValFunc |
| 20 | skipCompare |
| 21 | } |
| 22 | |
| 23 | func (p pointerparm) Declare(b *bytes.Buffer, prefix string, suffix string, caller bool) { |
| 24 | n := p.totype.TypeName() |
| 25 | if caller { |
| 26 | n = p.totype.QualName() |
| 27 | } |
| 28 | b.WriteString(fmt.Sprintf("%s *%s%s", prefix, n, suffix)) |
| 29 | } |
| 30 | |
| 31 | func (p pointerparm) GenElemRef(elidx int, path string) (string, parm) { |
| 32 | return path, &p |
| 33 | } |
| 34 | |
| 35 | func (p pointerparm) GenValue(s *genstate, f *funcdef, value int, caller bool) (string, int) { |
| 36 | pref := "" |
| 37 | if caller { |
| 38 | pref = s.checkerPkg(s.pkidx) + "." |
| 39 | } |
| 40 | var valstr string |
| 41 | valstr, value = s.GenValue(f, p.totype, value, caller) |
| 42 | fname := s.genAllocFunc(p.totype) |
| 43 | return fmt.Sprintf("%s%s(%s)", pref, fname, valstr), value |
| 44 | } |
| 45 | |
| 46 | func (p pointerparm) IsControl() bool { |
| 47 | return false |
| 48 | } |
| 49 | |
| 50 | func (p pointerparm) NumElements() int { |
| 51 | return 1 |
| 52 | } |
| 53 | |
| 54 | func (p pointerparm) String() string { |
| 55 | return fmt.Sprintf("*%s", p.totype) |
| 56 | } |
| 57 | |
| 58 | func (p pointerparm) TypeName() string { |
| 59 | return fmt.Sprintf("*%s", p.totype.TypeName()) |
| 60 | } |
| 61 | |
| 62 | func (p pointerparm) QualName() string { |
| 63 | return fmt.Sprintf("*%s", p.totype.QualName()) |
| 64 | } |
| 65 | |
| 66 | func mkPointerParm(to parm) pointerparm { |
| 67 | var pp pointerparm |
| 68 | pp.tag = "pointer" |
| 69 | pp.totype = to |
| 70 | return pp |
| 71 | } |
| 72 | |
| 73 | func (p pointerparm) HasPointer() bool { |
| 74 | return true |
| 75 | } |
| 76 |
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