---input---
123 -11 0 -0 0.5 .5 1. -0.5 +0.5 -.5 -1. 2e1 -2e1 2e -2e +2e e.3 -e.3 11.2e-3 -11.2e-3 5_6 5__6 _5 6_ 5.6_7 5.67_

---tokens---
'123'         Literal.Number.Integer
' '           Text
'-'           Operator
'11'          Literal.Number.Integer
' '           Text
'0'           Literal.Number.Integer
' '           Text
'-'           Operator
'0'           Literal.Number.Integer
' '           Text
'0.5'         Literal.Number.Float
' '           Text
'.5'          Literal.Number.Float
' '           Text
'1.'          Literal.Number.Float
' '           Text
'-'           Operator
'0.5'         Literal.Number.Float
' '           Text
'+'           Operator
'0.5'         Literal.Number.Float
' '           Text
'-'           Operator
'.5'          Literal.Number.Float
' '           Text
'-'           Operator
'1.'          Literal.Number.Float
' '           Text
'2e1'         Literal.Number.Float
' '           Text
'-'           Operator
'2e1'         Literal.Number.Float
' '           Text
'2'           Literal.Number.Integer
'e'           Name
' '           Text
'-'           Operator
'2'           Literal.Number.Integer
'e'           Name
' '           Text
'+'           Operator
'2'           Literal.Number.Integer
'e'           Name
' '           Text
'e'           Name
'.3'          Literal.Number.Float
' '           Text
'-'           Operator
'e'           Name
'.3'          Literal.Number.Float
' '           Text
'11.2e-3'     Literal.Number.Float
' '           Text
'-'           Operator
'11.2e-3'     Literal.Number.Float
' '           Text
'5_6'         Literal.Number.Integer
' '           Text
'5'           Literal.Number.Integer
'__6'         Name
' '           Text
'_5'          Name
' '           Text
'6'           Literal.Number.Integer
'_'           Name
' '           Text
'5.6_7'       Literal.Number.Float
' '           Text
'5.67'        Literal.Number.Float
'_'           Name
'\n'          Text.Whitespace
