// New is the factory for Typechecker visitor struct
func New() (ast.Executer, *symboltable.SymbolTable) {
toFrontend := make(chan *plumbing.Frontend)
st := symboltable.New()
go fakeFrontendDriver(toFrontend)
tc := &Typechecker{
execute: execute.New(toFrontend, st),
}
return tc, st
}
// New starts interpreter with an AST (*ast.Questionaire) and with
// channels to communicate with Frontend process.
func New(q *ast.QuestionaireNode) *plumbing.Pipes {
typecheck(q)
pipes := plumbing.New()
st := symboltable.New()
v := &interpreter{
questionaire: q,
send: pipes.ToFrontend(),
receive: pipes.FromFrontend(),
execute: execute.New(pipes.ToFrontend(), st),
draw: draw.New(pipes.ToFrontend()),
symbols: st,
}
go v.loop()
return pipes
}