Enum naga::Expression

pub enum Expression {
    Access {
        base: Handle<Expression>,
        index: Handle<Expression>,
    },
    AccessIndex {
        base: Handle<Expression>,
        index: u32,
    },
    Constant(Handle<Constant>),
    Compose {
        ty: Handle<Type>,
        components: Vec<Handle<Expression>>,
    },
    FunctionParameter(u32),
    GlobalVariable(Handle<GlobalVariable>),
    LocalVariable(Handle<LocalVariable>),
    Load {
        pointer: Handle<Expression>,
    },
    ImageSample {
        image: Handle<Expression>,
        sampler: Handle<Expression>,
        coordinate: Handle<Expression>,
        depth_ref: Option<Handle<Expression>>,
    },
    Unary {
        op: UnaryOperator,
        expr: Handle<Expression>,
    },
    Binary {
        op: BinaryOperator,
        left: Handle<Expression>,
        right: Handle<Expression>,
    },
    Intrinsic {
        fun: IntrinsicFunction,
        argument: Handle<Expression>,
    },
    DotProduct(Handle<Expression>, Handle<Expression>),
    CrossProduct(Handle<Expression>, Handle<Expression>),
    Derivative {
        axis: DerivativeAxis,
        expr: Handle<Expression>,
    },
    Call {
        origin: FunctionOrigin,
        arguments: Vec<Handle<Expression>>,
    },
}

An expression that can be evaluated to obtain a value.

Variants

Access

Array access with a computed index.

Fields of Access

base: Handle<Expression>index: Handle<Expression>

AccessIndex

Array access with a known index.

Fields of AccessIndex

base: Handle<Expression>index: u32

Constant(Handle<Constant>)

Constant value.

Compose

Composite expression.

Fields of Compose

ty: Handle<Type>components: Vec<Handle<Expression>>

FunctionParameter(u32)

Reference a function parameter, by its index.

GlobalVariable(Handle<GlobalVariable>)

Reference a global variable.

LocalVariable(Handle<LocalVariable>)

Reference a local variable.

Load

Load a value indirectly.

Fields of Load

pointer: Handle<Expression>

ImageSample

Sample a point from an image.

Fields of ImageSample

image: Handle<Expression>sampler: Handle<Expression>coordinate: Handle<Expression>depth_ref: Option<Handle<Expression>>

Unary

Apply an unary operator.

Fields of Unary

op: UnaryOperatorexpr: Handle<Expression>

Binary

Apply a binary operator.

Fields of Binary

op: BinaryOperatorleft: Handle<Expression>right: Handle<Expression>

Intrinsic

Call an intrinsic function.

Fields of Intrinsic

fun: IntrinsicFunctionargument: Handle<Expression>

DotProduct(Handle<Expression>, Handle<Expression>)

Dot product between two vectors.

CrossProduct(Handle<Expression>, Handle<Expression>)

Cross product between two vectors.

Derivative

Compute the derivative on an axis.

Fields of Derivative

axis: DerivativeAxisexpr: Handle<Expression>

Call

Call another function.

Fields of Call

origin: FunctionOriginarguments: Vec<Handle<Expression>>

Trait Implementations

impl Clone for Expression

fn clone(&self) -> Expression

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Expression

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

Formats the value using the given formatter.