Struct syntax::codemap::ExpnInfoExperimental

pub struct ExpnInfo {
    pub call_site: Span,
    pub callee: NameAndSpan,
}

Extra information for tracking macro expansion of spans

Fields

call_site	The location of the actual macro invocation, e.g. let x = foo!(); This may recursively refer to other macro invocations, e.g. if foo!() invoked bar!() internally, and there was an expression inside bar!; the call_site of the expression in the expansion would point to the bar! invocation; that call_site span would have its own ExpnInfo, with the call_site pointing to the foo! invocation.
callee	Information about the macro and its definition. The callee of the inner expression in the call_site example would point to the macro_rules! bar { ... } and that of the bar!() invocation would point to the macro_rules! foo { ... }.

Trait Implementations

Derived Implementations

impl Show for ExpnInfo

fn fmt(&self, __arg_0: &mut Formatter) -> Result

impl<__S: Writer> Hash<__S> for ExpnInfo

fn hash(&self, __arg_0: &mut __S)