Struct rustc_span::SpanData

source ·
pub struct SpanData {
    pub lo: BytePos,
    pub hi: BytePos,
    pub ctxt: SyntaxContext,
    pub parent: Option<LocalDefId>,
}
Expand description

Represents a span.

Spans represent a region of code, used for error reporting. Positions in spans are absolute positions from the beginning of the SourceMap, not positions relative to SourceFiles. Methods on the SourceMap can be used to relate spans back to the original source.

You must be careful if the span crosses more than one file, since you will not be able to use many of the functions on spans in source_map and you cannot assume that the length of the span is equal to span.hi - span.lo; there may be space in the BytePos range between files.

SpanData is public because Span uses a thread-local interner and can’t be sent to other threads, but some pieces of performance infra run in a separate thread. Using Span is generally preferred.

Fields

lo: BytePoshi: BytePosctxt: SyntaxContext

Information about where the macro came from, if this piece of code was created by a macro expansion.

parent: Option<LocalDefId>

Implementations

Returns true if this is a dummy span with any hygienic context.

Returns true if self fully encloses other.

Trait Implementations

Returns a copy of the value. Read more
Performs copy-assignment from source. Read more
Formats the value using the given formatter. Read more
Feeds this value into the given Hasher. Read more
Feeds a slice of this type into the given Hasher. Read more
This method returns an Ordering between self and other. Read more
Compares and returns the maximum of two values. Read more
Compares and returns the minimum of two values. Read more
Restrict a value to a certain interval. Read more
This method tests for self and other values to be equal, and is used by ==. Read more
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. Read more
This method returns an ordering between self and other values if one exists. Read more
This method tests less than (for self and other) and is used by the < operator. Read more
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
This method tests greater than (for self and other) and is used by the > operator. Read more
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
Uses borrowed data to replace owned data, usually by cloning. Read more
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 16 bytes