Struct proc_macro::Literal1.29.0[][src]

pub struct Literal(_);
Expand description

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.

Implementations

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

String literal.

Character literal.

Byte string literal.

Returns the span encompassing this literal.

Configures the span associated for this literal.

🔬 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

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

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

Formats the value using the given formatter. Read more

Performs the conversion.

Parse a single literal from its stringified representation.

In order to parse successfully, the input string must not contain anything but the literal token. Specifically, it must not contain whitespace or comments in addition to the literal.

The resulting literal token will have a Span::call_site() span.

NOTE: some errors may cause panics instead of returning LexError. We reserve the right to change these errors into LexErrors later.

The associated error which can be returned from parsing.

Parses a string s to return a value of this type. Read more

Converts the given value to a String. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Performs the conversion.

Performs the conversion.

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into #41263)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

Converts the given value to a String. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.