Enum MetaItemOrLitParser 

pub enum MetaItemOrLitParser {
    MetaItemParser(MetaItemParser),
    Lit(MetaItemLit),
}

Inside lists, values could be either literals, or more deeply nested meta items. This enum represents that.

Choose which one you want using the provided methods.

Variants

MetaItemParser(MetaItemParser)

Lit(MetaItemLit)

Implementations

impl MetaItemOrLitParser

pub fn parse_single<'sess>( parser: &mut Parser<'sess>, should_emit: ShouldEmit, allow_expr_metavar: AllowExprMetavar, ) -> PResult<'sess, MetaItemOrLitParser>

pub fn span(&self) -> Span

pub fn as_lit(&self) -> Option<&MetaItemLit>

pub fn meta_item(&self) -> Option<&MetaItemParser>

pub fn meta_item_no_args(&self) -> Option<&MetaItemParser>

Returns some if this MetaItemOrLitParser is a MetaItem with no arguments

pub fn ignore_args(&self)

Explicitly ignore the arguments, disarming the arguments-used check

Trait Implementations

impl Debug for MetaItemOrLitParser

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl ExpectNameValue for MetaItemOrLitParser

type Output<'a> = (Ident, &'a NameValueParser)

fn expect_name_value<'a, 'f, 'sess>( &'a self, cx: &mut AcceptContext<'f, 'sess>, span: Span, name: Option<Symbol>, ) -> Option<Self::Output<'a>>

impl ExpectStringLiteral for MetaItemOrLitParser

fn expect_string_literal<'f, 'sess>( &self, cx: &mut AcceptContext<'f, 'sess>, ) -> Option<Symbol>

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: 88 bytes

Size for each variant:

• MetaItemParser: 88 bytes
• Lit: 40 bytes