Struct Predef 

pub struct Predef {
    pub std: Std,
    pub gnu_extensions: bool,
    pub gnuc: GnucVersion,
    pub opt_level: OptLevel,
    pub hosted: bool,
    pub timestamp: Timestamp,
    pub defines: Vec<String>,
    pub undefines: Vec<String>,
}

Everything the predefined set is built from that is not the target.

Fields

std: Std

The dialect, which decides __STDC_VERSION__.

gnu_extensions: bool

Whether the GNU extensions are on, which is -std=gnu23 rather than -std=c23. It decides __STRICT_ANSI__ and the unarmoured linux and unix macros.

gnuc: GnucVersion

The GCC release claimed.

opt_level: OptLevel

Decides __OPTIMIZE__, __OPTIMIZE_SIZE__ and __NO_INLINE__.

hosted: bool

Whether there is a standard library, which is -ffreestanding turned around.

timestamp: Timestamp

__DATE__ and __TIME__.

defines: Vec<String>

-D in command line order. FOO means FOO=1, as GCC has it.

undefines: Vec<String>

-U in command line order, applied after the defines.

Implementations

impl Predef

pub fn new() -> Predef

The default dialect, gnu23, at -O0.

impl Predef

pub fn for_options(opts: &Options) -> Predef

The set the command line asked for.

The mapping lives here rather than in the driver because it is the definition of what each flag means to the macro set, and the driver’s job is to parse a command line, not to know that -ffreestanding is __STDC_HOSTED__ being zero.

Trait Implementations

impl Clone for Predef

fn clone(&self) -> Predef

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Predef

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

Formats the value using the given formatter.

impl Default for Predef

fn default() -> Predef

Returns the “default value” for a type.

impl Eq for Predef

impl PartialEq for Predef

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Predef