Struct MaybeMissingLocal 

pub struct MaybeMissingLocal {
    pub message: String,
    pub has_present_flag: bool,
}

A function-local binding that holds a read which may have found no value; see TypedAst::maybe_missing_locals.

Fields

message: String

What a use at T throws when the value is missing; it names the read.

has_present_flag: bool

Whether codegen keeps a present flag beside the binding: one typed with a type parameter, whose instantiation may hold undefined, can’t tell a missing read from a present undefined by its value. Recorded here because wide-slot erasure may type the binding unknown before codegen sees it.

Trait Implementations

impl Clone for MaybeMissingLocal

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MaybeMissingLocal

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

Formats the value using the given formatter.