Enum Instr 

pub enum Instr {
    Add {
        dst: usize,
        srcs: Vec<usize>,
    },
    Mul {
        dst: usize,
        srcs: Vec<usize>,
    },
    Pow {
        dst: usize,
        base: usize,
        exp: i64,
    },
    Powf {
        dst: usize,
        base: usize,
        exp: usize,
    },
    BuiltinOp {
        dst: usize,
        op: BuiltinOp,
        src: usize,
    },
    ExternalFun {
        dst: usize,
        fn_idx: usize,
        srcs: Vec<usize>,
    },
    Copy {
        dst: usize,
        src: usize,
    },
}

An internal, index-based instruction executed by super::ExpressionEvaluator.

All indices are absolute positions in the evaluator’s flat stack: indices 0..param_count are parameters, param_count..param_count+const_count are constants, and the remainder are temporaries and outputs.

Variants

Add

stack[dst] = sum(stack[srcs[0]], stack[srcs[1]], ...)

Fields

dst: usize

srcs: Vec<usize>

Mul

stack[dst] = product(stack[srcs[0]], stack[srcs[1]], ...)

Fields

dst: usize

srcs: Vec<usize>

Pow

stack[dst] = stack[base]^exp where exp is an integer

Fields

dst: usize

base: usize

exp: i64

Powf

stack[dst] = stack[base]^stack[exp] (floating-point exponent)

Fields

dst: usize

base: usize

exp: usize

BuiltinOp

stack[dst] = builtin(stack[src])

Fields

dst: usize

op: BuiltinOp

src: usize

ExternalFun

stack[dst] = fns[fn_idx](&stack[srcs[0]..])

Fields

dst: usize

fn_idx: usize

srcs: Vec<usize>

Copy

stack[dst] = stack[src]

Fields

dst: usize

src: usize

Implementations

impl Instr

pub fn dst(&self) -> usize

Return the destination stack index of this instruction.

Trait Implementations

impl Clone for Instr

fn clone(&self) -> Instr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Instr

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

Formats the value using the given formatter.