Returns true if the rune is a letter.

Returns true if the rune is a letter or a number.

Returns true if the rune is a new line character.

Returns true if the rune is a number.

Returns true if the rune is a whitespace character or a new line character.

Create a new lexer that will tokenize the given input.

Add a new task.

Add a dependency.

Mark this task as the next task to be executed.

Used to represent the end of the input.

Maximum depth of the lexer, if reached, the lexer will stop processing.

A lexer is used to tokenize a string into a series of tokens.

Represent different types of commands e.g add.

A lexer is a function that processes the input and returns the next state.