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[dev.typeparams] cmd/compile/internal/types2: move Struct type decl into struct.go (cleanup)
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>
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@ -9,6 +9,52 @@ import (
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"strconv"
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)
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// ----------------------------------------------------------------------------
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// API
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// A Struct represents a struct type.
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type Struct struct {
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fields []*Var
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tags []string // field tags; nil if there are no tags
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}
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// NewStruct returns a new struct with the given fields and corresponding field tags.
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// If a field with index i has a tag, tags[i] must be that tag, but len(tags) may be
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// only as long as required to hold the tag with the largest index i. Consequently,
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// if no field has a tag, tags may be nil.
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func NewStruct(fields []*Var, tags []string) *Struct {
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var fset objset
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for _, f := range fields {
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if f.name != "_" && fset.insert(f) != nil {
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panic("multiple fields with the same name")
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}
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}
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if len(tags) > len(fields) {
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panic("more tags than fields")
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}
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return &Struct{fields: fields, tags: tags}
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}
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// NumFields returns the number of fields in the struct (including blank and embedded fields).
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func (s *Struct) NumFields() int { return len(s.fields) }
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// Field returns the i'th field for 0 <= i < NumFields().
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func (s *Struct) Field(i int) *Var { return s.fields[i] }
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// Tag returns the i'th field tag for 0 <= i < NumFields().
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func (s *Struct) Tag(i int) string {
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if i < len(s.tags) {
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return s.tags[i]
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}
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return ""
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}
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func (s *Struct) Underlying() Type { return s }
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func (s *Struct) String() string { return TypeString(s, nil) }
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// ----------------------------------------------------------------------------
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// Implementation
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func (check *Checker) structType(styp *Struct, e *syntax.StructType) {
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if e.FieldList == nil {
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return
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@ -124,43 +124,6 @@ func NewSlice(elem Type) *Slice { return &Slice{elem: elem} }
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// Elem returns the element type of slice s.
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func (s *Slice) Elem() Type { return s.elem }
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// A Struct represents a struct type.
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type Struct struct {
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fields []*Var
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tags []string // field tags; nil if there are no tags
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}
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// NewStruct returns a new struct with the given fields and corresponding field tags.
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// If a field with index i has a tag, tags[i] must be that tag, but len(tags) may be
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// only as long as required to hold the tag with the largest index i. Consequently,
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// if no field has a tag, tags may be nil.
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func NewStruct(fields []*Var, tags []string) *Struct {
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var fset objset
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for _, f := range fields {
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if f.name != "_" && fset.insert(f) != nil {
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panic("multiple fields with the same name")
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}
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}
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if len(tags) > len(fields) {
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panic("more tags than fields")
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}
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return &Struct{fields: fields, tags: tags}
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}
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// NumFields returns the number of fields in the struct (including blank and embedded fields).
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func (s *Struct) NumFields() int { return len(s.fields) }
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// Field returns the i'th field for 0 <= i < NumFields().
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func (s *Struct) Field(i int) *Var { return s.fields[i] }
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// Tag returns the i'th field tag for 0 <= i < NumFields().
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func (s *Struct) Tag(i int) string {
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if i < len(s.tags) {
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return s.tags[i]
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}
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return ""
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}
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// A Pointer represents a pointer type.
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type Pointer struct {
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base Type // element type
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@ -741,7 +704,6 @@ var theTop = &top{}
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func (t *Basic) Underlying() Type { return t }
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func (t *Array) Underlying() Type { return t }
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func (t *Slice) Underlying() Type { return t }
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func (t *Struct) Underlying() Type { return t }
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func (t *Pointer) Underlying() Type { return t }
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func (t *Tuple) Underlying() Type { return t }
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func (t *Signature) Underlying() Type { return t }
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@ -757,7 +719,6 @@ func (t *top) Underlying() Type { return t }
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func (t *Basic) String() string { return TypeString(t, nil) }
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func (t *Array) String() string { return TypeString(t, nil) }
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func (t *Slice) String() string { return TypeString(t, nil) }
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func (t *Struct) String() string { return TypeString(t, nil) }
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func (t *Pointer) String() string { return TypeString(t, nil) }
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func (t *Tuple) String() string { return TypeString(t, nil) }
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func (t *Signature) String() string { return TypeString(t, nil) }
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