Struct syntax::codemap::hygiene::ExpnInfo[][src]

pub struct ExpnInfo {
    pub call_site: Span,
    pub def_site: Option<Span>,
    pub format: ExpnFormat,
    pub allow_internal_unstable: bool,
    pub allow_internal_unsafe: bool,
    pub local_inner_macros: bool,
    pub edition: Edition,
}
🔬 This is a nightly-only experimental API. (rustc_private)

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Extra information for tracking spans of macro and syntax sugar expansion

Fields

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

The location of the actual macro invocation or syntax sugar , e.g. let x = foo!(); or if let Some(y) = x {}

This may recursively refer to other macro invocations, e.g. if foo!() invoked bar!() internally, and there was an expression inside bar!; the call_site of the expression in the expansion would point to the bar! invocation; that call_site span would have its own ExpnInfo, with the call_site pointing to the foo! invocation.

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

The span of the macro definition itself. The macro may not have a sensible definition span (e.g. something defined completely inside libsyntax) in which case this is None. This span serves only informational purpose and is not used for resolution.

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

The format with which the macro was invoked.

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Whether the macro is allowed to use #[unstable]/feature-gated features internally without forcing the whole crate to opt-in to them.

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Whether the macro is allowed to use unsafe internally even if the user crate has #![forbid(unsafe_code)].

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Enables the macro helper hack (ident!(...) -> $crate::ident!(...)) for a given macro.

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Edition of the crate in which the macro is defined.

Trait Implementations

impl Clone for ExpnInfo
[src]

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

impl Debug for ExpnInfo
[src]

Formats the value using the given formatter. Read more

impl Decodable for ExpnInfo
[src]

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

impl Hash for ExpnInfo
[src]

Feeds this value into the given [Hasher]. Read more

Feeds a slice of this type into the given [Hasher]. Read more

impl Encodable for ExpnInfo
[src]

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Auto Trait Implementations

impl !Send for ExpnInfo

impl !Sync for ExpnInfo