Struct proc_macro::Span 1.29.0[−][src]
pub struct Span(_);Expand description
A region of source code, along with macro expansion information.
Implementations
A span that resolves at the macro definition site.
The span of the invocation of the current procedural macro. Identifiers created with this span will be resolved as if they were written directly at the macro call location (call-site hygiene) and other code at the macro call site will be able to refer to them as well.
A span that represents macro_rules hygiene, and sometimes resolves at the macro
definition site (local variables, labels, $crate) and sometimes at the macro
call site (everything else).
The span location is taken from the call-site.
The original source file into which this span points.
The Span for the tokens in the previous macro expansion from which
self was generated from, if any.
The span for the origin source code that self was generated from. If
this Span wasn’t generated from other macro expansions then the return
value is the same as *self.
Gets the starting line/column in the source file for this span.
Gets the ending line/column in the source file for this span.
Creates a new span encompassing self and other.
Returns None if self and other are from different files.
Creates a new span with the same line/column information as self but
that resolves symbols as though it were at other.
Creates a new span with the same name resolution behavior as self but
with the line/column information of other.
Compares to spans to see if they’re equal.
Returns the source text behind a span. This preserves the original source code, including spaces and comments. It only returns a result if the span corresponds to real source code.
Note: The observable result of a macro should only rely on the tokens and not on this source text. The result of this function is a best effort to be used for diagnostics only.
Creates a new Diagnostic with the given message at the span
self.
Creates a new Diagnostic with the given message at the span
self.
Creates a new Diagnostic with the given message at the span
self.
Trait Implementations
Prints a span in a form convenient for debugging.
Converts self into a Vec<Span>.
Auto Trait Implementations
Blanket Implementations
Mutably borrows from an owned value. Read more