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[dev.typeparams] cmd/compile/internal/types2: move Struct type decl into struct.go (cleanup)

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Change-Id: I074550236785091d2f79dd5de73c3462614c5c0e
Reviewed-on: https://go-review.googlesource.com/c/go/+/332090
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
This commit is contained in:
Robert Griesemer 2021-06-30 12:56:50 -07:00
parent fac21803ce
commit 1aadb18f83
2 changed files with 46 additions and 39 deletions
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46
src/cmd/compile/internal/types2/struct.go
View file

@ -9,6 +9,52 @@ import (
"strconv"
)
// ----------------------------------------------------------------------------
// API
// A Struct represents a struct type.
type Struct struct {
fields []*Var
tags []string // field tags; nil if there are no tags
}
// NewStruct returns a new struct with the given fields and corresponding field tags.
// If a field with index i has a tag, tags[i] must be that tag, but len(tags) may be
// only as long as required to hold the tag with the largest index i. Consequently,
// if no field has a tag, tags may be nil.
func NewStruct(fields []*Var, tags []string) *Struct {
var fset objset
for _, f := range fields {
if f.name != "_" && fset.insert(f) != nil {
panic("multiple fields with the same name")
}
}
if len(tags) > len(fields) {
panic("more tags than fields")
}
return &Struct{fields: fields, tags: tags}
}
// NumFields returns the number of fields in the struct (including blank and embedded fields).
func (s *Struct) NumFields() int { return len(s.fields) }
// Field returns the i'th field for 0 <= i < NumFields().
func (s *Struct) Field(i int) *Var { return s.fields[i] }
// Tag returns the i'th field tag for 0 <= i < NumFields().
func (s *Struct) Tag(i int) string {
if i < len(s.tags) {
return s.tags[i]
}
return ""
}
func (s *Struct) Underlying() Type { return s }
func (s *Struct) String() string { return TypeString(s, nil) }
// ----------------------------------------------------------------------------
// Implementation
func (check *Checker) structType(styp *Struct, e *syntax.StructType) {
if e.FieldList == nil {
return

39
src/cmd/compile/internal/types2/type.go
View file

@ -124,43 +124,6 @@ func NewSlice(elem Type) *Slice { return &Slice{elem: elem} }
// Elem returns the element type of slice s.
func (s *Slice) Elem() Type { return s.elem }
// A Struct represents a struct type.
type Struct struct {
fields []*Var
tags []string // field tags; nil if there are no tags
}
// NewStruct returns a new struct with the given fields and corresponding field tags.
// If a field with index i has a tag, tags[i] must be that tag, but len(tags) may be
// only as long as required to hold the tag with the largest index i. Consequently,
// if no field has a tag, tags may be nil.
func NewStruct(fields []*Var, tags []string) *Struct {
var fset objset
for _, f := range fields {
if f.name != "_" && fset.insert(f) != nil {
panic("multiple fields with the same name")
}
}
if len(tags) > len(fields) {
panic("more tags than fields")
}
return &Struct{fields: fields, tags: tags}
}
// NumFields returns the number of fields in the struct (including blank and embedded fields).
func (s *Struct) NumFields() int { return len(s.fields) }
// Field returns the i'th field for 0 <= i < NumFields().
func (s *Struct) Field(i int) *Var { return s.fields[i] }
// Tag returns the i'th field tag for 0 <= i < NumFields().
func (s *Struct) Tag(i int) string {
if i < len(s.tags) {
return s.tags[i]
}
return ""
}
// A Pointer represents a pointer type.
type Pointer struct {
base Type // element type
@ -741,7 +704,6 @@ var theTop = &top{}
func (t *Basic) Underlying() Type { return t }
func (t *Array) Underlying() Type { return t }
func (t *Slice) Underlying() Type { return t }
func (t *Struct) Underlying() Type { return t }
func (t *Pointer) Underlying() Type { return t }
func (t *Tuple) Underlying() Type { return t }
func (t *Signature) Underlying() Type { return t }
@ -757,7 +719,6 @@ func (t *top) Underlying() Type { return t }
func (t *Basic) String() string { return TypeString(t, nil) }
func (t *Array) String() string { return TypeString(t, nil) }
func (t *Slice) String() string { return TypeString(t, nil) }
func (t *Struct) String() string { return TypeString(t, nil) }
func (t *Pointer) String() string { return TypeString(t, nil) }
func (t *Tuple) String() string { return TypeString(t, nil) }
func (t *Signature) String() string { return TypeString(t, nil) }