blob: 7b6c64fd7f73b2cb753a60508fa7309a3cc83e2a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
package main
type MapTerminalFilter struct {}
func (filter MapTerminalFilter) exec(state *ProgramState) bool {
terminal, isTerminal := state.space.value.(TerminalValue)
if !isTerminal {
return false
}
return terminal == MapBegin || terminal == MapEnd
}
type NonTerminalFilter struct {}
func (filter NonTerminalFilter) exec(state *ProgramState) bool {
_, isTerminal := state.space.value.(TerminalValue)
return !isTerminal
}
type AnySegmentPathFilter struct {
next PathFilterState
}
func (filter AnySegmentPathFilter) eat(segment PathSegment) map[PathFilterState]struct{} {
res := make(map[PathFilterState]struct{})
res[filter.next] = struct{}{}
return res
}
func (filter AnySegmentPathFilter) accept() bool {
return false
}
type GroupPathFilter struct {
filters []PathFilterState
}
func (filter GroupPathFilter) eat(segment PathSegment) map[PathFilterState]struct{} {
res := make(map[PathFilterState]struct{})
for _, f := range filter.filters {
for r := range f.eat(segment) {
res[r] = struct{}{}
}
}
return res
}
func (filter GroupPathFilter) accept() bool {
for _, f := range filter.filters {
if f.accept() {
return true
}
}
return false
}
type NonePathFilter struct {}
func (filter NonePathFilter) eat(segment PathSegment) map[PathFilterState]struct{} {
return make(map[PathFilterState]struct{})
}
func (filter NonePathFilter) accept() bool {
return true
}
type StringSegmentPathFilter struct {
index string
next PathFilterState
}
func (filter StringSegmentPathFilter) eat(segment PathSegment) map[PathFilterState]struct{} {
s, isString := segment.(string)
res := make(map[PathFilterState]struct{})
if isString && s == filter.index {
res[filter.next] = struct{}{}
}
return res
}
func (filter StringSegmentPathFilter) accept() bool {
return false
}
type PathFilterState interface {
eat(PathSegment) map[PathFilterState]struct{}
accept() bool
}
|
