Struct Remarks 

pub struct Remarks(/* private fields */);

What a constant does that the dialect being compiled has an opinion about, or that happened to it on the way to a value.

A bitmask rather than a list, because a constant may earn several and a Vec per constant on a file full of them is a cost with nothing to show for it. Every one of these is legal in the dialect this compiler defaults to, so none of them is an error here: the caller decides what -pedantic, -Woverflow and -Werror make of them.

Implementations

impl Remarks

pub const NONE: Remarks

Nothing to say.

pub const BINARY: Remarks

A 0b constant before C23, where it is a GNU extension both compilers accept.

pub const SEPARATORS: Remarks

A digit separator before C23, which neither compiler accepts there.

pub const BIT_INT: Remarks

A wb suffix before C23.

pub const LONG_LONG: Remarks

An ll suffix under -std=c89, where GCC says “use of C99 long long integer constant”.

pub const UNSIGNED: Remarks

A decimal constant with no u suffix that fits no signed type, so it became an unsigned one. GCC says “integer constant is so large that it is unsigned”, and it is worth saying because the constant’s arithmetic is now unsigned and its negation is not negative.

pub const HEX_FLOAT: Remarks

A hexadecimal floating constant before C99, where GCC says “use of C99 hexadecimal floating constant”.

pub const EXTENDED_SUFFIX: Remarks

A suffix that names a type ISO C does not have: q, w, or one of the _FloatN and _FloatNx ones. GCC says “non-standard suffix on floating constant”, and separately that ISO C does not support the type.

pub const DOUBLE_SUFFIX: Remarks

A d suffix, which is a double written the long way. GCC gives this one its own wording, “suffix for double constant is a GCC extension”, and gives it in every dialect rather than only under -pedantic.

pub const IMAGINARY: Remarks

An i or j suffix. GCC says “imaginary constants are a GCC extension”, in every dialect, because no version of C has a spelling for one.

pub const OUT_OF_RANGE: Remarks

A value too large for its type, which became an infinity. GCC says “floating constant exceeds range of ‘double’” and names the type.

pub const TRUNCATED: Remarks

A nonzero value too small for its type, which became a zero. GCC says “floating constant truncated to zero”, and it is worth saying because the program now divides by zero where it meant to divide by something very small.

pub const MULTICHARACTER: Remarks

A character constant holding more than one character, whose value GCC builds by shifting them together and which the standard leaves implementation defined. GCC says “multi-character character constant”.

pub const TOO_LONG: Remarks

A character constant holding more characters than its type has room for, so the ones at the front are gone. GCC says “character constant too long for its type”, and says it instead of the multi-character remark rather than as well as it.

pub const UNKNOWN_ESCAPE: Remarks

An escape whose letter means nothing, which is the letter itself and a warning in both compilers. GCC says “unknown escape sequence”.

pub const NON_ISO_ESCAPE: Remarks

\e, the escape character, which both compilers have and no standard does. GCC says “non-ISO-standard escape sequence”.

pub const HEX_ESCAPE_OUT_OF_RANGE: Remarks

A \x escape whose value does not fit the element it is written in, so it was truncated. GCC says “hex escape sequence out of range”.

pub const OCTAL_ESCAPE_OUT_OF_RANGE: Remarks

An octal escape whose value does not fit the element it is written in. GCC gives this its own wording, “octal escape sequence out of range”, which is why it is its own flag.

pub const UCN: Remarks

A universal character name before C99, where GCC says “universal character names are only valid in C++ and C99” and converts it anyway.

pub const fn has(self, other: Remarks) -> bool

Whether every remark in other is set here.

pub const fn with(self, other: Remarks) -> Remarks

This set with other added.

pub const fn is_none(self) -> bool

Whether there is nothing to say.

Trait Implementations

impl Clone for Remarks

fn clone(&self) -> Remarks

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Remarks

impl Debug for Remarks

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

Formats the value using the given formatter.

impl Default for Remarks

fn default() -> Remarks

Returns the “default value” for a type.

impl Eq for Remarks

impl PartialEq for Remarks

fn eq(&self, other: &Remarks) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Remarks