Enum IdxExpr

pub enum IdxExpr {
    Const(usize),
    CurrIdx,
    Add(Box<IdxExpr>, Box<IdxExpr>),
    Sub(Box<IdxExpr>, Box<IdxExpr>),
    Mul(Box<IdxExpr>, Box<IdxExpr>),
    Div(Box<IdxExpr>, Box<IdxExpr>),
}

Enum representing operations with input/output indexes. Pushes a single CScriptNum on stack top. This is used to represent the index of the input or output.

Variants

Const(usize)

A constant <i> as CScriptNum

CurrIdx

Current Input index

Add(Box<IdxExpr>, Box<IdxExpr>)

Add two IdxExpr [X] [Y] ADD

Sub(Box<IdxExpr>, Box<IdxExpr>)

Subtract two IdxExpr [X] [Y] SUB

Mul(Box<IdxExpr>, Box<IdxExpr>)

Multiply two IdxExpr [X] SCIPTNUMTOLE64 [Y] SCIPTNUMTOLE64 MUL64 <1> EQUALVERIFY LE64TOSCIPTNUM

Div(Box<IdxExpr>, Box<IdxExpr>)

Divide two IdxExpr (integer division) [X] SCIPTNUMTOLE64 [Y] SCIPTNUMTOLE64 DIV64 <1> EQUALVERIFY NIP LE64TOSCIPTNUM

Implementations

impl IdxExpr

pub fn script_size(&self) -> usize

Returns the script size of this IdxExpr.

impl IdxExpr

pub fn push_to_builder(&self, builder: Builder) -> Builder

Push this script to builder Panics when trying to push a Null asset. This never occur in honest use-cases as there is no such thing as Null asset

pub fn eval(&self, env: &TxEnv<'_, '_>) -> Result<usize, EvalError>

Evaluate this expression

pub fn from_tokens(tokens: &[Tk<'_>], end_pos: usize) -> Option<(Self, usize)>

Returns (self, start_pos) parsed reversed form tokens starting with index end_pos Expression is parsed from tokens [start:end_pos]

Trait Implementations

impl Clone for IdxExpr

fn clone(&self) -> IdxExpr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for IdxExpr

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

Formats the value using the given formatter.

impl Display for IdxExpr

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

Formats the value using the given formatter.

impl FromTree for IdxExpr

fn from_tree(top: &Tree<'_>) -> Result<Self, Error>

Extract a structure from Tree representation

impl Hash for IdxExpr

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for IdxExpr

fn cmp(&self, other: &IdxExpr) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for IdxExpr

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for IdxExpr

fn partial_cmp(&self, other: &IdxExpr) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Eq for IdxExpr

impl StructuralPartialEq for IdxExpr