Пример #1
0
// Create looks for identifier in symboltable and creates a pointer if missing.
func (s *SymbolTable) Create(q *ast.QuestionNode) {
	identifier := q.Identifier()
	label := q.Label()
	qType := q.Type()
	pos := q.Pos()
	primitive := q.Primitive()

	_, ok := s.symbolExistP(identifier)
	if ok {
		s.appendErrf("%s:symboltable error: duplicated identifier found at symbol table: %s",
			pos, identifier)
		return
	}

	var symbol interface{}
	switch qType {
	case ast.ScalarQuestionType:
		newSymbol, err := scalarQuestionFactory(primitive)
		if err != nil {
			s.appendErrf("%s:symboltable error: %s", pos,
				err.Error())
		}
		symbol = newSymbol
	case ast.ComputedQuestionType:
		symbol = new(ComputedQuestion)
	}
	s.upsert(identifier, symbol)
	s.detectRepeatedLabel(identifier, label)
}
Пример #2
0
// QuestionNode adds question to symbol table, and dispatch to frontend
// rendering.
func (exec Execute) QuestionNode(q *ast.QuestionNode) {
	exec.symboltable.Create(q)

	r := exec.symboltable.Read(q.Identifier())

	if q.Type() == ast.ComputedQuestionType {
		expr := q.Content().(*ast.ComputedQuestion).Expression()
		r.(symboltable.StringParser).From(
			exec.resolveExpressionIntoString(expr),
		)
	}

	exec.toFrontend <- &plumbing.Frontend{
		Type:       plumbing.UpdateQuestion,
		Identifier: q.Identifier(),
		Label:      q.Label(),
		Value:      r.(fmt.Stringer).String(),
	}
}
Пример #3
0
// QuestionNode adds question to symbol table, and dispatch to frontend
// rendering.
func (d Draw) QuestionNode(q *ast.QuestionNode) {

	qcpy := q.Clone()
	visible := plumbing.Hidden
	if 0 == d.nest {
		visible = plumbing.Visible
	}

	ftyp := ""
	if qcpy.Type() == ast.ScalarQuestionType {
		ftyp = qcpy.Primitive()
	}

	d.toFrontend <- &plumbing.Frontend{
		Type: plumbing.DrawQuestion,

		Identifier: qcpy.Identifier(),
		Label:      qcpy.Label(),
		FieldType:  ftyp,

		Visible: visible,
	}
}