yosssi/gcss/element.go

package gcss

import "io"

// element represents an element of GCSS source codes.
type element interface {
        io.WriterTo
        AppendChild(child element)
        Base() *elementBase
        SetContext(*context)
        Context() *context
}

// newElement creates and returns an element.
func newElement(ln *line, parent element) (element, error) {
        var e element
        var err error

        switch {
        case ln.isComment():
                e = newComment(ln, parent)
        case ln.isAtRule():
                e = newAtRule(ln, parent)
        case ln.isMixinDeclaration():
                // error can be ignored becuase the line is checked beforehand
                // by calling `ln.isMixinDeclaration()`.
                e, _ = newMixinDeclaration(ln, parent)
        case ln.isMixinInvocation():
                // error can be ignored becuase the line is checked beforehand
                // by calling `ln.isMixinInvocation()`.
                e, _ = newMixinInvocation(ln, parent)
        case ln.isVariable():
                e, err = newVariable(ln, parent)
        case ln.isDeclaration():
                e, err = newDeclaration(ln, parent)
        default:
                e, err = newSelector(ln, parent)
        }

        return e, err
}
1	package gcss
2
3	import "io"
4
5	// element represents an element of GCSS source codes.
6	type element interface {
7	io.WriterTo
8	AppendChild(child element)
9	Base() *elementBase
10	SetContext(*context)
11	Context() *context
12	}
13
14	// newElement creates and returns an element.
15	func newElement(ln *line, parent element) (element, error) {
16	var e element
17	var err error
18
19	switch {
20	case ln.isComment():
21	e = newComment(ln, parent)
22	case ln.isAtRule():
23	e = newAtRule(ln, parent)
24	case ln.isMixinDeclaration():
25	// error can be ignored becuase the line is checked beforehand
26	// by calling `ln.isMixinDeclaration()`.
27	e, _ = newMixinDeclaration(ln, parent)
28	case ln.isMixinInvocation():
29	// error can be ignored becuase the line is checked beforehand
30	// by calling `ln.isMixinInvocation()`.
31	e, _ = newMixinInvocation(ln, parent)
32	case ln.isVariable():
33	e, err = newVariable(ln, parent)
34	case ln.isDeclaration():
35	e, err = newDeclaration(ln, parent)
36	default:
37	e, err = newSelector(ln, parent)
38	}
39
40	return e, err
41	}
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