flow like the river

BACK_BACK/node_modules/@iarna/toml/lib/parser-debug.js

@@ -0,0 +1,60 @@
+'use strict'
+const Parser = require('./parser.js')
+const util = require('util')
+
+const dump = _ => util.inspect(_, {colors: true, depth: 10, breakLength: Infinity})
+class DebugParser extends Parser {
+  stateName (state) {
+    // istanbul ignore next
+    return (state.parser && state.parser.name) || state.name || ('anonymous')
+  }
+  runOne () {
+    const callStack = this.stack.concat(this.state).map(_ => this.stateName(_)).join(' <- ')
+    console.log('RUN', callStack, dump({line: this.line, col: this.col, char: this.char, ret: this.state.returned}))
+    return super.runOne()
+  }
+  finish () {
+    const obj = super.finish()
+    // istanbul ignore if
+    if (this.stack.length !== 0) {
+      throw new Parser.Error('All states did not return by end of stream')
+    }
+    return obj
+  }
+  callStack () {
+    const callStack = this.stack.map(_ => this.stateName(_)).join('    ').replace(/\S/g, ' ')
+    return callStack ? callStack + '    ' : ''
+  }
+  next (fn) {
+    console.log('  ', this.callStack(), 'NEXT', this.stateName(fn))
+    return super.next(fn)
+  }
+  goto (fn) {
+    console.log('  ', this.callStack(), 'GOTO', this.stateName(fn))
+    super.next(fn)
+    return false
+  }
+  call (fn, returnWith) {
+    console.log('  ', this.callStack(), 'CALL', fn.name, returnWith ? '-> ' + returnWith.name : '')
+    if (returnWith) super.next(returnWith)
+    this.stack.push(this.state)
+    this.state = {parser: fn, buf: '', returned: null}
+  }
+  callNow (fn, returnWith) {
+    console.log('  ', this.callStack(), 'CALLNOW', fn.name, returnWith ? '-> ' + returnWith.name : '')
+    if (returnWith) super.next(returnWith)
+    this.stack.push(this.state)
+    this.state = {parser: fn, buf: '', returned: null}
+    return false
+  }
+  return (value) {
+    console.log('  ', this.callStack(), 'RETURN')
+    return super.return(value)
+  }
+  returnNow (value) {
+    console.log('  ', this.callStack(), 'RETURNNOW')
+    super.return(value)
+    return false
+  }
+}
+module.exports = DebugParser