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|
/* Generated by re2swift */
// re2swift $INPUT -o $OUTPUT -i
enum Result { case ok, fail }
func lex(_ yyinput: UnsafePointer<UInt8>) -> Result {
var yycursor = 0, yymarker = 0
var yych: UInt8 = 0
var yyaccept: UInt = 0
var yystate: UInt = 0
yyl: while true {
switch yystate {
case 0:
yych = yyinput[yycursor]
yycursor += 1
switch yych {
case 0x2E:
yystate = 3
continue yyl
case 0x30:
yystate = 4
continue yyl
case 0x31...0x39:
yystate = 5
continue yyl
default:
yystate = 1
continue yyl
}
case 1:
yystate = 2
continue yyl
case 2: return .fail
case 3:
yych = yyinput[yycursor]
switch yych {
case 0x30...0x39:
yycursor += 1
yystate = 7
continue yyl
default:
yystate = 2
continue yyl
}
case 4:
yyaccept = 0
yymarker = yycursor
yych = yyinput[yycursor]
switch yych {
case 0x2E:
yycursor += 1
yystate = 7
continue yyl
case 0x30...0x39:
yycursor += 1
yystate = 9
continue yyl
case 0x45:
fallthrough
case 0x65:
yycursor += 1
yystate = 11
continue yyl
default:
yystate = 2
continue yyl
}
case 5:
yyaccept = 1
yymarker = yycursor
yych = yyinput[yycursor]
switch yych {
case 0x2E:
yycursor += 1
yystate = 7
continue yyl
case 0x30...0x39:
yycursor += 1
yystate = 5
continue yyl
case 0x45:
fallthrough
case 0x65:
yycursor += 1
yystate = 11
continue yyl
default:
yystate = 6
continue yyl
}
case 6: return .ok
case 7:
yyaccept = 2
yymarker = yycursor
yych = yyinput[yycursor]
switch yych {
case 0x30...0x39:
yycursor += 1
yystate = 7
continue yyl
case 0x45:
fallthrough
case 0x65:
yycursor += 1
yystate = 11
continue yyl
default:
yystate = 8
continue yyl
}
case 8: return .ok
case 9:
yych = yyinput[yycursor]
switch yych {
case 0x2E:
yycursor += 1
yystate = 7
continue yyl
case 0x30...0x39:
yycursor += 1
yystate = 9
continue yyl
case 0x45:
fallthrough
case 0x65:
yycursor += 1
yystate = 11
continue yyl
default:
yystate = 10
continue yyl
}
case 10:
yycursor = yymarker
switch yyaccept {
case 0:
yystate = 2
continue yyl
case 1:
yystate = 6
continue yyl
default:
yystate = 8
continue yyl
}
case 11:
yych = yyinput[yycursor]
switch yych {
case 0x2B:
fallthrough
case 0x2D:
yycursor += 1
yystate = 12
continue yyl
case 0x30...0x39:
yycursor += 1
yystate = 13
continue yyl
default:
yystate = 10
continue yyl
}
case 12:
yych = yyinput[yycursor]
switch yych {
case 0x30...0x39:
yycursor += 1
yystate = 13
continue yyl
default:
yystate = 10
continue yyl
}
case 13:
yych = yyinput[yycursor]
switch yych {
case 0x30...0x39:
yycursor += 1
yystate = 13
continue yyl
default:
yystate = 8
continue yyl
}
default: fatalError("internal lexer error")
}
}
}
assert(lex("123") == .ok)
assert(lex("123.4567") == .ok)
|
