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package main
// Expecter records the state when checking a list of lines from top to bottom.
type Expecter struct {
lines []*Line
index int
m []string
}
func NewExpecter(lines []*Line) *Expecter {
return &Expecter{lines, 0, nil}
}
func (exp *Expecter) CurrentLine() *Line {
if exp.index < len(exp.lines) {
return exp.lines[exp.index]
}
return NewLineEOF(exp.lines[0].Fname)
}
func (exp *Expecter) PreviousLine() *Line {
return exp.lines[exp.index-1]
}
func (exp *Expecter) EOF() bool {
return !(exp.index < len(exp.lines))
}
func (exp *Expecter) Advance() bool {
exp.index++
exp.m = nil
return true
}
func (exp *Expecter) StepBack() {
exp.index--
}
func (exp *Expecter) AdvanceIfMatches(re RegexPattern) bool {
if G.opts.Debug {
defer tracecall(exp.CurrentLine().Text, re)()
}
if !exp.EOF() {
if m := match(exp.lines[exp.index].Text, re); m != nil {
exp.index++
exp.m = m
return true
}
}
return false
}
func (exp *Expecter) AdvanceIfPrefix(prefix string) bool {
if G.opts.Debug {
defer tracecall2(exp.CurrentLine().Text, prefix)()
}
return !exp.EOF() && hasPrefix(exp.lines[exp.index].Text, prefix) && exp.Advance()
}
func (exp *Expecter) AdvanceIfEquals(text string) bool {
if G.opts.Debug {
defer tracecall2(exp.CurrentLine().Text, text)()
}
return !exp.EOF() && exp.lines[exp.index].Text == text && exp.Advance()
}
func (exp *Expecter) ExpectEmptyLine() bool {
if exp.AdvanceIfEquals("") {
return true
}
if G.opts.WarnSpace {
if !exp.CurrentLine().AutofixInsertBefore("") {
exp.CurrentLine().Notef("Empty line expected.")
}
}
return false
}
func (exp *Expecter) ExpectText(text string) bool {
if !exp.EOF() && exp.lines[exp.index].Text == text {
exp.index++
exp.m = nil
return true
}
exp.CurrentLine().Warnf("This line should contain the following text: %s", text)
return false
}
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