type BlockKind uint8

const (
	KindInvalid BlockKind = iota // Stmt=nil

	KindUnreachable     // unreachable block after {Branch,Return}Stmt / no-return call ExprStmt
	KindBody            // function body BlockStmt
	KindForBody         // body of ForStmt
	KindForDone         // block after ForStmt
	KindForLoop         // head of ForStmt
	KindForPost         // post condition of ForStmt
	KindIfDone          // block after IfStmt

		// we inserted above.
		pos := f.fset.File(n.Body.End()).Pos(elseOffset + 4)
		switch stmt := n.Else.(type) {
		case *ast.IfStmt:
			block := &ast.BlockStmt{
				Lbrace: pos,
				List:   []ast.Stmt{stmt},
				Rbrace: stmt.End(),
			}
			n.Else = block
		case *ast.BlockStmt:
			stmt.Lbrace = pos
		default:
			panic("unexpected node type in if")
		}
		ast.Walk(f, n.Else)
		return nil
	case *ast.SelectStmt:

		addVar := func(expr ast.Expr) {
			if id, _ := expr.(*ast.Ident); id != nil {
				if obj := pass.TypesInfo.ObjectOf(id); obj != nil {
					vars = append(vars, obj)
				}
			}
		}
		var body *ast.BlockStmt
		switch n := n.(type) {
		case *ast.File:
			// Only traverse the file if its goversion is strictly before go1.22.
			goversion := versions.FileVersion(pass.TypesInfo, n)

}

// context must be a non-empty string unless we know that p.tok == _Lbrace.
func (p *parser) blockStmt(context string) *BlockStmt {
	if trace {
		defer p.trace("blockStmt")()
	}

	s := new(BlockStmt)
	s.pos = p.pos()

	// people coming from C may forget that braces are mandatory in Go
	if !p.got(_Lbrace) {

	//     19  .  .  .  .  Params: *ast.FieldList {
	//     20  .  .  .  .  .  Opening: 3:10
	//     21  .  .  .  .  .  Closing: 3:11
	//     22  .  .  .  .  }
	//     23  .  .  .  }
	//     24  .  .  .  Body: *ast.BlockStmt {
	//     25  .  .  .  .  Lbrace: 3:13
	//     26  .  .  .  .  List: []ast.Stmt (len = 1) {
	//     27  .  .  .  .  .  0: *ast.ExprStmt {
	//     28  .  .  .  .  .  .  X: *ast.CallExpr {

// node, along with the number of call expressions encountered.
func restOfBlock(stack []ast.Node) ([]ast.Stmt, int) {
	var ncalls int
	for i := len(stack) - 1; i >= 0; i-- {
		if b, ok := stack[i].(*ast.BlockStmt); ok {
			for j, v := range b.List {
				if v == stack[i+1] {
					return b.List[j:], ncalls
				}
			}
			break
		}

		if _, ok := stack[i].(*ast.CallExpr); ok {
			ncalls++
		}
	}

	// The Scopes mapping does not contain an entry for the
	// function body ([*ast.BlockStmt]); the function's scope is
	// associated with the [*ast.FuncType].
	//
	// The following node types may appear in Scopes:
	//
	//     *ast.File
	//     *ast.FuncType
	//     *ast.TypeSpec
	//     *ast.BlockStmt
	//     *ast.IfStmt
	//     *ast.SwitchStmt
	//     *ast.TypeSwitchStmt
	//     *ast.CaseClause

	// The Scopes mapping does not contain an entry for the
	// function body ([*ast.BlockStmt]); the function's scope is
	// associated with the [*ast.FuncType].
	//
	// The following node types may appear in Scopes:
	//
	//     *syntax.File
	//     *syntax.FuncType
	//     *syntax.TypeDecl
	//     *syntax.BlockStmt
	//     *syntax.IfStmt
	//     *syntax.SwitchStmt
	//     *syntax.CaseClause

		Walk(v, n.Call)

	case *DeferStmt:
		Walk(v, n.Call)

	case *ReturnStmt:
		walkList(v, n.Results)

	case *BranchStmt:
		if n.Label != nil {
			Walk(v, n.Label)
		}

	case *BlockStmt:
		walkList(v, n.List)

	case *IfStmt:
		if n.Init != nil {
			Walk(v, n.Init)
		}
		Walk(v, n.Cond)
		Walk(v, n.Body)
		if n.Else != nil {
			Walk(v, n.Else)
		}

package types

import (
	"go/ast"
	"go/constant"
	"go/token"
	"internal/buildcfg"
	. "internal/types/errors"
	"sort"
)

func (check *Checker) funcBody(decl *declInfo, name string, sig *Signature, body *ast.BlockStmt, iota constant.Value) {
	if check.conf.IgnoreFuncBodies {
		panic("function body not ignored")
	}

	if check.conf._Trace {
		check.trace(body.Pos(), "-- %s: %s", name, sig)
	}