Function parse_source_file 

pub fn parse_source_file(
    source: &str,
    errors: Option<&mut Vec<String>>,
) -> ParseResult<usize>

Parse all top-level declarations from an OxiLean source file.

Returns the count of successfully parsed declarations. Errors within individual declarations are collected into errors (if provided) and parsing continues at the next declaration.

Errors

Returns Err only when the source is empty.