Struct Condition 

pub struct Condition {
    pub defined: Symbol,
    pub report: bool,
}

What a #if line asks of an expansion that an ordinary stretch of a file does not.

Only defined is in here, and it carries its own name because the expander has nothing else to recognise an operator by: by the time a line reaches expansion it is a run of tokens like any other, and defined is an identifier in every one of them.

Fields

defined: Symbol

What defined is called, interned.

report: bool

Whether to report each defined an expansion produced, which is -Wpedantic.

Trait Implementations

impl Clone for Condition

fn clone(&self) -> Condition

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Condition

impl Debug for Condition

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.