OXIESEC PANEL

Name	Size	Modified	Perms
📁 ..	-	12/01/2022 06:13:56 PM	rwxr-xr-x
📄 api.go	17.05 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 api_test.go	81.16 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 array.go	802 bytes	12/01/2022 06:12:58 PM	rw-r--r--
📄 assignments.go	12.86 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 basic.go	1.48 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 builtins.go	24.28 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 builtins_test.go	9.7 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 call.go	22.29 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 chan.go	909 bytes	12/01/2022 06:12:58 PM	rw-r--r--
📄 check.go	17.32 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 check_test.go	12.11 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 context.go	4.34 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 context_test.go	2.33 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 conversions.go	8.28 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 decl.go	28.77 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 errorcodes.go	31.51 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 errorcodes_test.go	4.95 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 errors.go	9.87 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 errors_test.go	1 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 eval.go	3.05 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 eval_test.go	7.4 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 example_test.go	9.03 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 expr.go	51.97 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 exprstring.go	4.81 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 exprstring_test.go	2.36 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 gccgosizes.go	1.02 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 gotype.go	8.33 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 hilbert_test.go	3.61 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 index.go	11.03 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 infer.go	25.18 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 initorder.go	9.48 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 instantiate.go	9.94 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 instantiate_test.go	6.02 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 interface.go	8.08 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 issues_test.go	17.49 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 labels.go	7.17 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 lookup.go	16.93 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 main_test.go	335 bytes	12/01/2022 06:12:58 PM	rw-r--r--
📄 map.go	658 bytes	12/01/2022 06:12:58 PM	rw-r--r--
📄 methodset.go	6.75 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 methodset_test.go	5.75 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 mono.go	9.05 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 mono_test.go	2.63 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 named.go	22.37 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 named_test.go	2.69 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 object.go	17.92 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 object_test.go	5.21 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 objset.go	927 bytes	12/01/2022 06:12:58 PM	rw-r--r--
📄 operand.go	10 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 package.go	2.38 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 pointer.go	634 bytes	12/01/2022 06:12:58 PM	rw-r--r--
📄 predicates.go	14.71 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 resolver.go	24.38 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 resolver_test.go	4.58 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 return.go	4.21 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 scope.go	9.33 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 selection.go	3.99 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 self_test.go	2.57 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 signature.go	12.49 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 sizeof_test.go	1.26 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 sizes.go	7.56 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 sizes_test.go	3.33 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 slice.go	576 bytes	12/01/2022 06:12:58 PM	rw-r--r--
📄 stdlib_test.go	9.45 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 stmt.go	26.17 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 struct.go	6.04 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 subst.go	10.76 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 termlist.go	3.68 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 termlist_test.go	7.18 KB	12/01/2022 06:12:58 PM	rw-r--r--
📁 testdata	-	12/01/2022 06:13:56 PM	rwxr-xr-x
📄 token_test.go	1.21 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 tuple.go	928 bytes	12/01/2022 06:12:58 PM	rw-r--r--
📄 type.go	2.92 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 typelists.go	1.84 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 typeparam.go	4.74 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 typeset.go	14.22 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 typeset_test.go	2.34 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 typestring.go	10.64 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 typestring_test.go	4.21 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 typeterm.go	3.52 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 typeterm_test.go	5.1 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 typexpr.go	14.64 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 unify.go	18.35 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 union.go	6.22 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 universe.go	7.66 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 validtype.go	7.77 KB	12/01/2022 06:12:58 PM	rw-r--r--
📄 version.go	2.2 KB	12/01/2022 06:12:58 PM	rw-r--r--

Editing: struct.go

// Copyright 2021 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.

package types

import (
	"go/ast"
	"go/token"
	"strconv"
)

// ----------------------------------------------------------------------------
// API

// A Struct represents a struct type.
type Struct struct {
	fields []*Var   // fields != nil indicates the struct is set up (possibly with len(fields) == 0)
	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")
	}
	s := &Struct{fields: fields, tags: tags}
	s.markComplete()
	return s
}

// 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 (t *Struct) Underlying() Type { return t }
func (t *Struct) String() string   { return TypeString(t, nil) }

// ----------------------------------------------------------------------------
// Implementation

func (s *Struct) markComplete() {
	if s.fields == nil {
		s.fields = make([]*Var, 0)
	}
}

func (check *Checker) structType(styp *Struct, e *ast.StructType) {
	list := e.Fields
	if list == nil {
		styp.markComplete()
		return
	}

// struct fields and tags
	var fields []*Var
	var tags []string

// for double-declaration checks
	var fset objset

// current field typ and tag
	var typ Type
	var tag string
	add := func(ident *ast.Ident, embedded bool, pos token.Pos) {
		if tag != "" && tags == nil {
			tags = make([]string, len(fields))
		}
		if tags != nil {
			tags = append(tags, tag)
		}

name := ident.Name
		fld := NewField(pos, check.pkg, name, typ, embedded)
		// spec: "Within a struct, non-blank field names must be unique."
		if name == "_" || check.declareInSet(&fset, pos, fld) {
			fields = append(fields, fld)
			check.recordDef(ident, fld)
		}
	}

// addInvalid adds an embedded field of invalid type to the struct for
	// fields with errors; this keeps the number of struct fields in sync
	// with the source as long as the fields are _ or have different names
	// (issue #25627).
	addInvalid := func(ident *ast.Ident, pos token.Pos) {
		typ = Typ[Invalid]
		tag = ""
		add(ident, true, pos)
	}

for _, f := range list.List {
		typ = check.varType(f.Type)
		tag = check.tag(f.Tag)
		if len(f.Names) > 0 {
			// named fields
			for _, name := range f.Names {
				add(name, false, name.Pos())
			}
		} else {
			// embedded field
			// spec: "An embedded type must be specified as a type name T or as a
			// pointer to a non-interface type name *T, and T itself may not be a
			// pointer type."
			pos := f.Type.Pos()
			name := embeddedFieldIdent(f.Type)
			if name == nil {
				check.invalidAST(f.Type, "embedded field type %s has no name", f.Type)
				name = ast.NewIdent("_")
				name.NamePos = pos
				addInvalid(name, pos)
				continue
			}
			add(name, true, pos)

// Because we have a name, typ must be of the form T or *T, where T is the name
			// of a (named or alias) type, and t (= deref(typ)) must be the type of T.
			// We must delay this check to the end because we don't want to instantiate
			// (via under(t)) a possibly incomplete type.

// for use in the closure below
			embeddedTyp := typ
			embeddedPos := f.Type

check.later(func() {
				t, isPtr := deref(embeddedTyp)
				switch u := under(t).(type) {
				case *Basic:
					if t == Typ[Invalid] {
						// error was reported before
						return
					}
					// unsafe.Pointer is treated like a regular pointer
					if u.kind == UnsafePointer {
						check.error(embeddedPos, _InvalidPtrEmbed, "embedded field type cannot be unsafe.Pointer")
					}
				case *Pointer:
					check.error(embeddedPos, _InvalidPtrEmbed, "embedded field type cannot be a pointer")
				case *Interface:
					if isTypeParam(t) {
						// The error code here is inconsistent with other error codes for
						// invalid embedding, because this restriction may be relaxed in the
						// future, and so it did not warrant a new error code.
						check.error(embeddedPos, _MisplacedTypeParam, "embedded field type cannot be a (pointer to a) type parameter")
						break
					}
					if isPtr {
						check.error(embeddedPos, _InvalidPtrEmbed, "embedded field type cannot be a pointer to an interface")
					}
				}
			}).describef(embeddedPos, "check embedded type %s", embeddedTyp)
		}
	}

styp.fields = fields
	styp.tags = tags
	styp.markComplete()
}

func embeddedFieldIdent(e ast.Expr) *ast.Ident {
	switch e := e.(type) {
	case *ast.Ident:
		return e
	case *ast.StarExpr:
		// *T is valid, but **T is not
		if _, ok := e.X.(*ast.StarExpr); !ok {
			return embeddedFieldIdent(e.X)
		}
	case *ast.SelectorExpr:
		return e.Sel
	case *ast.IndexExpr:
		return embeddedFieldIdent(e.X)
	case *ast.IndexListExpr:
		return embeddedFieldIdent(e.X)
	}
	return nil // invalid embedded field
}

func (check *Checker) declareInSet(oset *objset, pos token.Pos, obj Object) bool {
	if alt := oset.insert(obj); alt != nil {
		check.errorf(atPos(pos), _DuplicateDecl, "%s redeclared", obj.Name())
		check.reportAltDecl(alt)
		return false
	}
	return true
}

func (check *Checker) tag(t *ast.BasicLit) string {
	if t != nil {
		if t.Kind == token.STRING {
			if val, err := strconv.Unquote(t.Value); err == nil {
				return val
			}
		}
		check.invalidAST(t, "incorrect tag syntax: %q", t.Value)
	}
	return ""
}