1.29.0[][src]Struct proc_macro::Literal

pub struct Literal(_);

A literal string ("hello"), byte string (b"hello"), character ('a'), byte character (b'a'), an integer or floating point number with or without a suffix (1, 1u8, 2.3, 2.3f32). Boolean literals like true and false do not belong here, they are Idents.

Methods

impl Literal[src]

pub fn u8_suffixed(n: u8) -> Literal[src]

Creates a new suffixed integer literal with the specified value.

This function will create an integer like 1u32 where the integer value specified is the first part of the token and the integral is also suffixed at the end. Literals created from negative numbers may not survive round-trips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn u16_suffixed(n: u16) -> Literal[src]

Creates a new suffixed integer literal with the specified value.

This function will create an integer like 1u32 where the integer value specified is the first part of the token and the integral is also suffixed at the end. Literals created from negative numbers may not survive round-trips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn u32_suffixed(n: u32) -> Literal[src]

Creates a new suffixed integer literal with the specified value.

This function will create an integer like 1u32 where the integer value specified is the first part of the token and the integral is also suffixed at the end. Literals created from negative numbers may not survive round-trips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn u64_suffixed(n: u64) -> Literal[src]

Creates a new suffixed integer literal with the specified value.

This function will create an integer like 1u32 where the integer value specified is the first part of the token and the integral is also suffixed at the end. Literals created from negative numbers may not survive round-trips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn u128_suffixed(n: u128) -> Literal[src]

Creates a new suffixed integer literal with the specified value.

This function will create an integer like 1u32 where the integer value specified is the first part of the token and the integral is also suffixed at the end. Literals created from negative numbers may not survive round-trips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn usize_suffixed(n: usize) -> Literal[src]

Creates a new suffixed integer literal with the specified value.

This function will create an integer like 1u32 where the integer value specified is the first part of the token and the integral is also suffixed at the end. Literals created from negative numbers may not survive round-trips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn i8_suffixed(n: i8) -> Literal[src]

Creates a new suffixed integer literal with the specified value.

This function will create an integer like 1u32 where the integer value specified is the first part of the token and the integral is also suffixed at the end. Literals created from negative numbers may not survive round-trips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn i16_suffixed(n: i16) -> Literal[src]

Creates a new suffixed integer literal with the specified value.

This function will create an integer like 1u32 where the integer value specified is the first part of the token and the integral is also suffixed at the end. Literals created from negative numbers may not survive round-trips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn i32_suffixed(n: i32) -> Literal[src]

Creates a new suffixed integer literal with the specified value.

This function will create an integer like 1u32 where the integer value specified is the first part of the token and the integral is also suffixed at the end. Literals created from negative numbers may not survive round-trips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn i64_suffixed(n: i64) -> Literal[src]

Creates a new suffixed integer literal with the specified value.

This function will create an integer like 1u32 where the integer value specified is the first part of the token and the integral is also suffixed at the end. Literals created from negative numbers may not survive round-trips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn i128_suffixed(n: i128) -> Literal[src]

Creates a new suffixed integer literal with the specified value.

This function will create an integer like 1u32 where the integer value specified is the first part of the token and the integral is also suffixed at the end. Literals created from negative numbers may not survive round-trips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn isize_suffixed(n: isize) -> Literal[src]

Creates a new suffixed integer literal with the specified value.

This function will create an integer like 1u32 where the integer value specified is the first part of the token and the integral is also suffixed at the end. Literals created from negative numbers may not survive round-trips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn u8_unsuffixed(n: u8) -> Literal[src]

Creates a new unsuffixed integer literal with the specified value.

This function will create an integer like 1 where the integer value specified is the first part of the token. No suffix is specified on this token, meaning that invocations like Literal::i8_unsuffixed(1) are equivalent to Literal::u32_unsuffixed(1). Literals created from negative numbers may not survive rountrips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn u16_unsuffixed(n: u16) -> Literal[src]

Creates a new unsuffixed integer literal with the specified value.

This function will create an integer like 1 where the integer value specified is the first part of the token. No suffix is specified on this token, meaning that invocations like Literal::i8_unsuffixed(1) are equivalent to Literal::u32_unsuffixed(1). Literals created from negative numbers may not survive rountrips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn u32_unsuffixed(n: u32) -> Literal[src]

Creates a new unsuffixed integer literal with the specified value.

This function will create an integer like 1 where the integer value specified is the first part of the token. No suffix is specified on this token, meaning that invocations like Literal::i8_unsuffixed(1) are equivalent to Literal::u32_unsuffixed(1). Literals created from negative numbers may not survive rountrips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn u64_unsuffixed(n: u64) -> Literal[src]

Creates a new unsuffixed integer literal with the specified value.

This function will create an integer like 1 where the integer value specified is the first part of the token. No suffix is specified on this token, meaning that invocations like Literal::i8_unsuffixed(1) are equivalent to Literal::u32_unsuffixed(1). Literals created from negative numbers may not survive rountrips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn u128_unsuffixed(n: u128) -> Literal[src]

Creates a new unsuffixed integer literal with the specified value.

This function will create an integer like 1 where the integer value specified is the first part of the token. No suffix is specified on this token, meaning that invocations like Literal::i8_unsuffixed(1) are equivalent to Literal::u32_unsuffixed(1). Literals created from negative numbers may not survive rountrips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn usize_unsuffixed(n: usize) -> Literal[src]

Creates a new unsuffixed integer literal with the specified value.

This function will create an integer like 1 where the integer value specified is the first part of the token. No suffix is specified on this token, meaning that invocations like Literal::i8_unsuffixed(1) are equivalent to Literal::u32_unsuffixed(1). Literals created from negative numbers may not survive rountrips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn i8_unsuffixed(n: i8) -> Literal[src]

Creates a new unsuffixed integer literal with the specified value.

This function will create an integer like 1 where the integer value specified is the first part of the token. No suffix is specified on this token, meaning that invocations like Literal::i8_unsuffixed(1) are equivalent to Literal::u32_unsuffixed(1). Literals created from negative numbers may not survive rountrips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn i16_unsuffixed(n: i16) -> Literal[src]

Creates a new unsuffixed integer literal with the specified value.

This function will create an integer like 1 where the integer value specified is the first part of the token. No suffix is specified on this token, meaning that invocations like Literal::i8_unsuffixed(1) are equivalent to Literal::u32_unsuffixed(1). Literals created from negative numbers may not survive rountrips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn i32_unsuffixed(n: i32) -> Literal[src]

Creates a new unsuffixed integer literal with the specified value.

This function will create an integer like 1 where the integer value specified is the first part of the token. No suffix is specified on this token, meaning that invocations like Literal::i8_unsuffixed(1) are equivalent to Literal::u32_unsuffixed(1). Literals created from negative numbers may not survive rountrips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn i64_unsuffixed(n: i64) -> Literal[src]

Creates a new unsuffixed integer literal with the specified value.

This function will create an integer like 1 where the integer value specified is the first part of the token. No suffix is specified on this token, meaning that invocations like Literal::i8_unsuffixed(1) are equivalent to Literal::u32_unsuffixed(1). Literals created from negative numbers may not survive rountrips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn i128_unsuffixed(n: i128) -> Literal[src]

Creates a new unsuffixed integer literal with the specified value.

This function will create an integer like 1 where the integer value specified is the first part of the token. No suffix is specified on this token, meaning that invocations like Literal::i8_unsuffixed(1) are equivalent to Literal::u32_unsuffixed(1). Literals created from negative numbers may not survive rountrips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn isize_unsuffixed(n: isize) -> Literal[src]

Creates a new unsuffixed integer literal with the specified value.

This function will create an integer like 1 where the integer value specified is the first part of the token. No suffix is specified on this token, meaning that invocations like Literal::i8_unsuffixed(1) are equivalent to Literal::u32_unsuffixed(1). Literals created from negative numbers may not survive rountrips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Literals created through this method have the Span::call_site() span by default, which can be configured with the set_span method below.

pub fn f32_unsuffixed(n: f32) -> Literal[src]

Creates a new unsuffixed floating-point literal.

This constructor is similar to those like Literal::i8_unsuffixed where the float's value is emitted directly into the token but no suffix is used, so it may be inferred to be a f64 later in the compiler. Literals created from negative numbers may not survive rountrips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Panics

This function requires that the specified float is finite, for example if it is infinity or NaN this function will panic.

pub fn f32_suffixed(n: f32) -> Literal[src]

Creates a new suffixed floating-point literal.

This constructor will create a literal like 1.0f32 where the value specified is the preceding part of the token and f32 is the suffix of the token. This token will always be inferred to be an f32 in the compiler. Literals created from negative numbers may not survive rountrips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Panics

This function requires that the specified float is finite, for example if it is infinity or NaN this function will panic.

pub fn f64_unsuffixed(n: f64) -> Literal[src]

Creates a new unsuffixed floating-point literal.

This constructor is similar to those like Literal::i8_unsuffixed where the float's value is emitted directly into the token but no suffix is used, so it may be inferred to be a f64 later in the compiler. Literals created from negative numbers may not survive rountrips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Panics

This function requires that the specified float is finite, for example if it is infinity or NaN this function will panic.

pub fn f64_suffixed(n: f64) -> Literal[src]

Creates a new suffixed floating-point literal.

This constructor will create a literal like 1.0f64 where the value specified is the preceding part of the token and f64 is the suffix of the token. This token will always be inferred to be an f64 in the compiler. Literals created from negative numbers may not survive rountrips through TokenStream or strings and may be broken into two tokens (- and positive literal).

Panics

This function requires that the specified float is finite, for example if it is infinity or NaN this function will panic.

pub fn string(string: &str) -> Literal[src]

String literal.

pub fn character(ch: char) -> Literal[src]

Character literal.

pub fn byte_string(bytes: &[u8]) -> Literal[src]

Byte string literal.

pub fn span(&self) -> Span[src]

Returns the span encompassing this literal.

pub fn set_span(&mut self, span: Span)[src]

Configures the span associated for this literal.

pub fn subspan<R: RangeBounds<usize>>(&self, range: R) -> Option<Span>[src]

🔬 This is a nightly-only experimental API. (proc_macro_span #54725)

Returns a Span that is a subset of self.span() containing only the source bytes in range range. Returns None if the would-be trimmed span is outside the bounds of self.

Trait Implementations

impl Clone for Literal[src]

impl Debug for Literal[src]

impl Display for Literal[src]

Prints the literal as a string that should be losslessly convertible back into the same literal (except for possible rounding for floating point literals).

impl From<Literal> for TokenTree[src]

impl ToString for Literal1.15.0[src]

Auto Trait Implementations

impl RefUnwindSafe for Literal

impl !Send for Literal

impl !Sync for Literal

impl Unpin for Literal

impl UnwindSafe for Literal

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
[src]

impl<T> Borrow<T> for T where
    T: ?Sized
[src]

impl<T> BorrowMut<T> for T where
    T: ?Sized
[src]

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
[src]

impl<T> ToOwned for T where
    T: Clone
[src]

type Owned = T

The resulting type after obtaining ownership.

impl<T> ToString for T where
    T: Display + ?Sized
[src]

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
[src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.