pub struct Span {
    pub lo: BytePos,
    pub hi: BytePos,
    pub ctxt: SyntaxContext,
}
Expand description

Spans represent a region of code, used for error reporting. Positions in spans are absolute positions from the beginning of the source_map, 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 - 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 = hi - lo; there may be space in the BytePos range between files.

Fields

lo: BytePoshi: BytePosctxt: SyntaxContext

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

Implementations

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

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

Returns a new span representing an empty span at the beginning of this span

Returns a new span representing an empty span at the end of this span

Returns self if self is not the dummy span, and other otherwise.

Return true if self fully encloses other.

Return true if the spans are equal with regards to the source text.

Use this instead of == when either span could be generated code, and you only care that they point to the same bytes of source text.

Returns Some(span), where the start is trimmed by the end of other

Return a Span that would enclose both self and end.

Return a Span between the end of self to the beginning of end.

Return a Span between the beginning of self to the beginning of end.

Returns true if self is marked with mark.

Panics if mark is not a valid mark.

Dummy span, both position are extremely large numbers so they would be ignore by sourcemap, but can still have comments

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
Returns the “default value” for a type. Read more
Deserialize this value from the given Serde deserializer. Read more

Always returns true

Converts to this type from the input type.
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
Serialize this value into the given Serde serializer. Read more
Get span of self.
Create a dummy value of this type.
Mutate self using op, which accepts owned data.

Always returns true

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.

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
Instruments this type with the current Span, returning an Instrumented wrapper. Read more

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.
Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more