Struct tapyrus::util::amount::SignedAmount

pub struct SignedAmount(/* private fields */);

SignedAmount

The SignedAmount type can be used to express TPC amounts that supports arithmetic and conversion to various denominations.

Warning!

This type implements several arithmetic operations from std::ops. To prevent errors due to overflow or underflow when using these operations, it is advised to instead use the checked arithmetic methods whose names start with checked_. The operations from std::ops that Amount implements will panic when overflow or underflow occurs.

Implementations

impl SignedAmount

pub const ZERO: SignedAmount = _

The zero amount.

pub const ONE_TAP: SignedAmount = _

Exactly one tapyrus.

pub const ONE_TPC: SignedAmount = _

Exactly one TPC.

pub fn from_tap(tapyrus: i64) -> SignedAmount

Create an SignedAmount with tapyrus precision and the given number of tapyruses.

pub fn as_tap(self) -> i64

Get the number of tapyrus in this SignedAmount.

pub fn max_value() -> SignedAmount

The maximum value of an SignedAmount.

pub fn min_value() -> SignedAmount

The minimum value of an SignedAmount.

pub fn from_tpc(tpc: f64) -> Result<SignedAmount, ParseAmountError>

Convert from a value expressing tpcs to an SignedAmount.

pub fn from_str_in( s: &str, denom: Denomination ) -> Result<SignedAmount, ParseAmountError>

Parse a decimal string as a value in the given denomination.

Note: This only parses the value string. If you want to parse a value with denomination, use FromStr.

pub fn from_str_with_denomination( s: &str ) -> Result<SignedAmount, ParseAmountError>

Parses amounts with denomination suffix like they are produced with [to_string_with_denomination] or with fmt::Display. If you want to parse only the amount without the denomination, use [from_str_in].

pub fn to_float_in(self, denom: Denomination) -> f64

Express this SignedAmount as a floating-point value in the given denomination.

Please be aware of the risk of using floating-point numbers.

pub fn as_tpc(self) -> f64

Express this SignedAmount as a floating-point value in TPC.

Equivalent to to_float_in(Denomination::TPC).

Please be aware of the risk of using floating-point numbers.

pub fn from_float_in( value: f64, denom: Denomination ) -> Result<SignedAmount, ParseAmountError>

Convert this SignedAmount in floating-point notation with a given denomination. Can return error if the amount is too big, too precise or negative.

Please be aware of the risk of using floating-point numbers.

pub fn fmt_value_in(self, f: &mut dyn Write, denom: Denomination) -> Result

Format the value of this SignedAmount in the given denomination.

Does not include the denomination.

pub fn to_string_in(self, denom: Denomination) -> String

Get a string number of this SignedAmount in the given denomination.

Does not include the denomination.

pub fn to_string_with_denomination(&self, denom: Denomination) -> String

Get a formatted string of this SignedAmount in the given denomination, suffixed with the abbreviation for the denomination.

pub fn abs(self) -> SignedAmount

Get the absolute value of this SignedAmount.

pub fn signum(self) -> i64

Returns a number representing sign of this SignedAmount.

• 0 if the amount is zero
• 1 if the amount is positive
• -1 if the amount is negative

pub fn is_positive(self) -> bool

Returns true if this SignedAmount is positive and false if this SignedAmount is zero or negative.

pub fn is_negative(self) -> bool

Returns true if this SignedAmount is negative and false if this SignedAmount is zero or positive.

pub fn checked_abs(self) -> Option<SignedAmount>

Get the absolute value of this SignedAmount. Returns None if overflow occurred. (self == min_value())

pub fn checked_add(self, rhs: SignedAmount) -> Option<SignedAmount>

Checked addition. Returns None if overflow occurred.

pub fn checked_sub(self, rhs: SignedAmount) -> Option<SignedAmount>

Checked subtraction. Returns None if overflow occurred.

pub fn checked_mul(self, rhs: i64) -> Option<SignedAmount>

Checked multiplication. Returns None if overflow occurred.

pub fn checked_div(self, rhs: i64) -> Option<SignedAmount>

Checked integer division. Be aware that integer division loses the remainder if no exact division can be made. Returns None if overflow occurred.

pub fn checked_rem(self, rhs: i64) -> Option<SignedAmount>

Checked remainder. Returns None if overflow occurred.

pub fn positive_sub(self, rhs: SignedAmount) -> Option<SignedAmount>

Subtraction that doesn’t allow negative SignedAmounts. Returns None if either self, [rhs] or the result is strictly negative.

pub fn to_unsigned(self) -> Result<Amount, ParseAmountError>

Convert to an unsigned amount.

Trait Implementations

impl Add for SignedAmount

type Output = SignedAmount

The resulting type after applying the + operator.

fn add(self, rhs: SignedAmount) -> Self::Output

Performs the + operation.

impl AddAssign for SignedAmount

fn add_assign(&mut self, other: SignedAmount)

Performs the += operation.

impl Clone for SignedAmount

fn clone(&self) -> SignedAmount

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for SignedAmount

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

Formats the value using the given formatter.

impl Default for SignedAmount

fn default() -> Self

Returns the “default value” for a type.

impl Display for SignedAmount

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

Formats the value using the given formatter.

impl Div<i64> for SignedAmount

type Output = SignedAmount

The resulting type after applying the / operator.

fn div(self, rhs: i64) -> Self::Output

Performs the / operation.

impl DivAssign<i64> for SignedAmount

fn div_assign(&mut self, rhs: i64)

Performs the /= operation.

impl FromStr for SignedAmount

type Err = ParseAmountError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for SignedAmount

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 Mul<i64> for SignedAmount

type Output = SignedAmount

The resulting type after applying the * operator.

fn mul(self, rhs: i64) -> Self::Output

Performs the * operation.

impl MulAssign<i64> for SignedAmount

fn mul_assign(&mut self, rhs: i64)

Performs the *= operation.

impl Ord for SignedAmount

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

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Selfwhere Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for SignedAmount

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd for SignedAmount

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

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

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

This method tests less than (for self and other) and is used by the < operator.

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

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

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

This method tests greater than (for self and other) and is used by the > operator.

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

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

impl Rem<i64> for SignedAmount

type Output = SignedAmount

The resulting type after applying the % operator.

fn rem(self, modulus: i64) -> Self

Performs the % operation.

impl RemAssign<i64> for SignedAmount

fn rem_assign(&mut self, modulus: i64)

Performs the %= operation.

impl Sub for SignedAmount

type Output = SignedAmount

The resulting type after applying the - operator.

fn sub(self, rhs: SignedAmount) -> Self::Output

Performs the - operation.

impl SubAssign for SignedAmount

fn sub_assign(&mut self, other: SignedAmount)

Performs the -= operation.

impl Copy for SignedAmount

impl Eq for SignedAmount

impl StructuralEq for SignedAmount

impl StructuralPartialEq for SignedAmount