43 lines
821 B
Go
43 lines
821 B
Go
package parsekit
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func (p *P) Repeat() {
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p.nextState = p.state
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return
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}
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func (p *P) RouteTo(state StateFn) *routeFollowup {
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p.nextState = state
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return &routeFollowup{p}
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}
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type routeFollowup struct {
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p *P
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}
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func (r *routeFollowup) ThenTo(state StateFn) *routeFollowup {
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r.p.pushState(state)
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return r
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}
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func (r *routeFollowup) ThenReturnHere() {
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r.p.pushState(r.p.state)
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}
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func (p *P) RouteReturn() {
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p.nextState = p.popState()
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}
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// PushState adds the state function to the state stack.
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// This is used for implementing nested parsing.
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func (p *P) pushState(state StateFn) {
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p.stack = append(p.stack, state)
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}
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// PopState pops the last pushed state from the state stack.
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func (p *P) popState() StateFn {
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last := len(p.stack) - 1
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head, tail := p.stack[:last], p.stack[last]
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p.stack = head
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return tail
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}
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