Parsing

Parsing and type-check builtins in Tish.

Functions

Function	Description
`parseInt(s, radix?)`	Parse string to integer. Optional radix (default 10).
`parseFloat(s)`	Parse string to number
`isFinite(v)`	True if v is finite number
`isNaN(v)`	True if v is NaN

Global	Description
`Infinity`	Positive infinity
`NaN`	Not-a-number