Function parse_body_loc_start

parser/src/parsing/source.rs:23–48

Parse the line and column number of function block. A function block is wrapped in a pair of braces, i.e. `{ ... }`

(block: &syn::Block)

///
/// A function block is wrapped in a pair of braces, i.e. `{ ... }`
pub(crate) fn parse_body_loc_start(block: &syn::Block) -> LineColumn {
    // Given a function like... the `loc.column` will be at
    //   - `fn func<T>(i: T) -> T where T: Into<u64> { `
    //                                              ^
    //   - `fn func<T>(i: T) -> T where T: Into<u64>{ `
    //                                             ^
    //   - `fn func() { `
    //               ^
    //   - `fn func(){ `
    //              ^
    // However, we want the `loc.column` to be one character after `{`, i.e.
    //   - `fn func<T>(i: T) -> T where T: Into<u64> { `
    //                                                ^
    //   - `fn func<T>(i: T) -> T where T: Into<u64>{ `
    //                                               ^
    //   - `fn func() { `
    //                 ^
    //   - `fn func(){ `
    //                ^
    let mut loc: LineColumn = block.span().start().into_loc();
    // Hence, `loc.column + 2`
    if let Some(col) = loc.column.as_mut() {
        *col += 2;
    }
    loc
}

/// Parse the line and column number of function block.
///