Parse creates a lexer to scan the given input string, and uses the given `parse` function to parse tokens into a result.

ParseDocstringPragmaArguments parses the docstring and returns the values of all pragma arguments declarations.

ParseDocstringPragmaSigners parses the docstring and returns the values of all pragma signers declarations.

ExpressionDepthLimitReachedError is reported when the expression depth limit was reached.