60 lines
1.9 KiB
JavaScript
60 lines
1.9 KiB
JavaScript
'use strict'
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const Parser = require('./parser.js')
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const util = require('util')
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const dump = _ => util.inspect(_, {colors: true, depth: 10, breakLength: Infinity})
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class DebugParser extends Parser {
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stateName (state) {
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// istanbul ignore next
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return (state.parser && state.parser.name) || state.name || ('anonymous')
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}
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runOne () {
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const callStack = this.stack.concat(this.state).map(_ => this.stateName(_)).join(' <- ')
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console.log('RUN', callStack, dump({line: this.line, col: this.col, char: this.char, ret: this.state.returned}))
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return super.runOne()
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}
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finish () {
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const obj = super.finish()
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// istanbul ignore if
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if (this.stack.length !== 0) {
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throw new Parser.Error('All states did not return by end of stream')
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}
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return obj
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}
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callStack () {
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const callStack = this.stack.map(_ => this.stateName(_)).join(' ').replace(/\S/g, ' ')
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return callStack ? callStack + ' ' : ''
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}
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next (fn) {
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console.log(' ', this.callStack(), 'NEXT', this.stateName(fn))
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return super.next(fn)
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}
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goto (fn) {
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console.log(' ', this.callStack(), 'GOTO', this.stateName(fn))
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super.next(fn)
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return false
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}
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call (fn, returnWith) {
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console.log(' ', this.callStack(), 'CALL', fn.name, returnWith ? '-> ' + returnWith.name : '')
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if (returnWith) super.next(returnWith)
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this.stack.push(this.state)
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this.state = {parser: fn, buf: '', returned: null}
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}
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callNow (fn, returnWith) {
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console.log(' ', this.callStack(), 'CALLNOW', fn.name, returnWith ? '-> ' + returnWith.name : '')
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if (returnWith) super.next(returnWith)
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this.stack.push(this.state)
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this.state = {parser: fn, buf: '', returned: null}
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return false
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}
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return (value) {
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console.log(' ', this.callStack(), 'RETURN')
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return super.return(value)
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}
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returnNow (value) {
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console.log(' ', this.callStack(), 'RETURNNOW')
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super.return(value)
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return false
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}
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}
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module.exports = DebugParser
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