Enum naga::front::wgsl::lower::ExpressionContextType

pub enum ExpressionContextType<'temp, 'out> {
    Runtime(LocalExpressionContext<'temp, 'out>),
    Constant(Option<LocalExpressionContext<'temp, 'out>>),
    Override,
}

The type of Naga IR expression we are lowering an ast::Expression to.

Variants

Runtime(LocalExpressionContext<'temp, 'out>)

We are lowering to an arbitrary runtime expression, to be included in a function’s body.

The given LocalExpressionContext holds information about local variables, arguments, and other definitions available only to runtime expressions, not constant or override expressions.

Constant(Option<LocalExpressionContext<'temp, 'out>>)

We are lowering to a constant expression, to be included in the module’s constant expression arena.

Everything global constant expressions are allowed to refer to is available in the ExpressionContext, but local constant expressions can also refer to other

Override

We are lowering to an override expression, to be included in the module’s constant expression arena.

Everything override expressions are allowed to refer to is available in the ExpressionContext, so this variant carries no further information.