return &ast.BadExpr{From: s.Pos(), To: p.safePos(s.End())}
}

// parseIfHeader is an adjusted version of parser.header
// in cmd/compile/internal/syntax/parser.go, which has
// been tuned for better error handling.
func (p *parser) parseIfHeader() (init ast.Stmt, cond ast.Expr) {
	if p.tok == token.LBRACE {
		p.error(p.pos, "missing condition in if statement")