Struct proc_macro::Span

[+] Show type declaration

pub struct Span(_);

🔬 This is a nightly-only experimental API. (proc_macro #38356)

[−] Expand description

A region of source code, along with macro expansion information.

Methods

impl Span

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pub fn def_site() -> Span

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🔬 This is a nightly-only experimental API. (proc_macro #38356)

A span that resolves at the macro definition site.

impl Span

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pub fn call_site() -> Span

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🔬 This is a nightly-only experimental API. (proc_macro #38356)

The span of the invocation of the current procedural macro.

pub fn source_file(&self) -> SourceFile

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🔬 This is a nightly-only experimental API. (proc_macro #38356)

The original source file into which this span points.

pub fn parent(&self) -> Option<Span>

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🔬 This is a nightly-only experimental API. (proc_macro #38356)

The Span for the tokens in the previous macro expansion from which self was generated from, if any.

pub fn source(&self) -> Span

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🔬 This is a nightly-only experimental API. (proc_macro #38356)

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.

pub fn start(&self) -> LineColumn

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🔬 This is a nightly-only experimental API. (proc_macro #38356)

Get the starting line/column in the source file for this span.

pub fn end(&self) -> LineColumn

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🔬 This is a nightly-only experimental API. (proc_macro #38356)

Get the ending line/column in the source file for this span.

pub fn join(&self, other: Span) -> Option<Span>

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🔬 This is a nightly-only experimental API. (proc_macro #38356)

Create a new span encompassing self and other.

Returns None if self and other are from different files.

pub fn resolved_at(&self, other: Span) -> Span

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🔬 This is a nightly-only experimental API. (proc_macro #38356)

Creates a new span with the same line/column information as self but that resolves symbols as though it were at other.

pub fn located_at(&self, other: Span) -> Span

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🔬 This is a nightly-only experimental API. (proc_macro #38356)

Creates a new span with the same name resolution behavior as self but with the line/column information of other.

pub fn error<T: Into<String>>(self, message: T) -> Diagnostic

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🔬 This is a nightly-only experimental API. (proc_macro #38356)

Create a new Diagnostic with the given message at the span self.

pub fn warning<T: Into<String>>(self, message: T) -> Diagnostic

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🔬 This is a nightly-only experimental API. (proc_macro #38356)

Create a new Diagnostic with the given message at the span self.

pub fn note<T: Into<String>>(self, message: T) -> Diagnostic

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🔬 This is a nightly-only experimental API. (proc_macro #38356)

Create a new Diagnostic with the given message at the span self.

pub fn help<T: Into<String>>(self, message: T) -> Diagnostic

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🔬 This is a nightly-only experimental API. (proc_macro #38356)

Create a new Diagnostic with the given message at the span self.

Trait Implementations

impl Copy for Span

impl Clone for Span

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fn clone(&self) -> Span

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Returns a copy of the value.

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

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Performs copy-assignment from source.

impl Debug for Span

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fn fmt(&self, __arg_0: &mut Formatter) -> Result

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Formats the value using the given formatter.

impl PartialEq for Span

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fn eq(&self, __arg_0: &Span) -> bool

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This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, __arg_0: &Span) -> bool

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This method tests for !=.

impl Eq for Span