Enum glsl::syntax::Preprocessor

pub enum Preprocessor {
    Version(PreprocessorVersion),
    Extension(PreprocessorExtension),
}

Expand description

Some basic preprocessor commands.

As it’s important to carry them around the AST because they cannot be substituted in a normal preprocessor (they’re used by GPU’s compilers), those preprocessor commands are available for inspection.

Important note: others preprocessor commands can be used in your source. However, they’ll get substituted upfront. For instance, if you use have #define foo 42 defined in your file, every occurrence to foo will get replaced by 42 and then treated as a normal GLSL expression (in that case, ending as an Expr::IntConst(42) value). This might be unfortunate for people seeking minimal size. However, you’re free to use a minifier aftewards to re-enable _that kind of feature. To be honest, it’s not worth it to interleave the AST with preprocessor command annotations just so that the resulting code size is minimal. Just use a minifier.

Variants§

Version(PreprocessorVersion)

Extension(PreprocessorExtension)

Trait Implementations§

impl Clone for Preprocessor

fn clone(&self) -> Preprocessor

Returns a copy of the value. Read more

1.0.0 · source§

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

Performs copy-assignment from source. Read more

impl Debug for Preprocessor

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

Formats the value using the given formatter. Read more

impl Parse for Preprocessor

fn parse<B>(source: B) -> ParseResult<Self>where
B: AsRef<[u8]>,

Parse from a byte slice.

fn parse_str<S>(source: S) -> ParseResult<Self>where
S: AsRef<str>,

Parse from a string.

impl PartialEq<Preprocessor> for Preprocessor

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

This method tests for self and other values to be equal, and is used by ==. Read more

1.0.0 · source§

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. Read more

impl StructuralPartialEq for Preprocessor

Auto Trait Implementations§

impl RefUnwindSafe for Preprocessor

impl Send for Preprocessor

impl Sync for Preprocessor

impl Unpin for Preprocessor

impl UnwindSafe for Preprocessor

Blanket Implementations§

impl<T> Any for Twhere
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for Twhere
T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for Twhere
T: ?Sized,

const: unstable · source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for Twhere
U: From<T>,

const: unstable · source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> ToOwned for Twhere
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

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

fn clone_into(&self, target: &mut T)

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

impl<T, U> TryFrom<U> for Twhere
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for Twhere
U: TryFrom<T>,

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

The type returned in the event of a conversion error.

const: unstable · source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.