func stWhitespace(l lex.Lexer) lex.StateFn {
for next := l.PeekRune(0); inMapR(next, whitespaceChars); next = l.PeekRune(0) {
l.NextRune()
if next == '\n' {
l.NewLine()
}
}
emit(l, Whitespace)
return stStart
}
func readLongString(l lex.Lexer) bool {
numEquals := longStringEquals('[', l)
if numEquals < 0 {
emitError("Expecting [ to start string.")
return false
}
// eat first [
l.NextRune()
for i := 0; i < numEquals; i++ {
if l.NextRune() != '=' {
emitError("Expected string `=` padding.")
return false
}
}
// gobble string contents
for {
char := l.NextRune()
if char == lex.RuneEOF {
emitError("Unexpected EOF. Expecting long-string close.")
return false
}
if char == '\n' {
l.NewLine()
}
// potential close
if char == ']' {
// ungobble first ]
l.BackupRune()
closingCt := longStringEquals(']', l)
if closingCt != numEquals {
// re-gobble the ]
l.NextRune()
} else {
// it was our close!
// eat the closing bits
l.NextRune()
for i := 0; i < numEquals; i++ {
if l.NextRune() != '=' {
emitError("Expected close-string `=` padding.")
}
}
l.NextRune()
return true
}
}
}
return false
}
func stReadString(l lex.Lexer) lex.StateFn {
delim := l.NextRune()
if !(delim == '\'' || delim == '"') {
emitError("Expected `\"` or `'` to start quote-string.")
}
for {
char := l.NextRune()
switch char {
case delim:
// end of string
fmt.Println("End of the string!")
emit(l, String)
return stStart
case '\\':
l.NextRune()
case lex.RuneEOF:
l.EmitEOF()
case '\n':
l.NewLine()
}
}
return stStart
}