Type Alias ExecEvalBoolSubroutine 

pub type ExecEvalBoolSubroutine = Option<unsafe extern "C-unwind" fn(state: *mut ExprState, op: *mut ExprEvalStep, econtext: *mut ExprContext) -> bool>;

Aliased Type

pub enum ExecEvalBoolSubroutine {
    None,
    Some(unsafe extern "C-unwind" fn(*mut ExprState, *mut ExprEvalStep, *mut ExprContext) -> bool),
}

Variants

None

No value.

Some(unsafe extern "C-unwind" fn(*mut ExprState, *mut ExprEvalStep, *mut ExprContext) -> bool)

Some value of type T.