Module polkadot_sdk_frame::arithmetic::traits

Primitive traits for the runtime arithmetic.

Traits

• AtLeast8Bit
  A meta trait for arithmetic.
• AtLeast8BitUnsigned
  A meta trait for arithmetic. Same as AtLeast8Bit, but also bounded to be unsigned.
• AtLeast16Bit
  A meta trait for arithmetic.
• AtLeast16BitUnsigned
  A meta trait for arithmetic. Same as AtLeast16Bit, but also bounded to be unsigned.
• AtLeast32Bit
  A meta trait for arithmetic.
• AtLeast32BitUnsigned
  A meta trait for arithmetic. Same as AtLeast32Bit, but also bounded to be unsigned.
• BaseArithmetic
  A meta trait for arithmetic type operations, regardless of any limitation on size.
• Bounded
  Numbers which have upper and lower bounds
• CheckedAdd
  Performs addition that returns None instead of wrapping around on overflow.
• CheckedDiv
  Performs division that returns None instead of panicking on division by zero and instead of wrapping around on underflow and overflow.
• CheckedMul
  Performs multiplication that returns None instead of wrapping around on underflow or overflow.
• CheckedNeg
  Performs negation that returns None if the result can’t be represented.
• CheckedRem
  Performs an integral remainder that returns None instead of panicking on division by zero and instead of wrapping around on underflow and overflow.
• CheckedShl
  Performs a left shift that returns None on shifts larger than or equal to the type width.
• CheckedShr
  Performs a right shift that returns None on shifts larger than or equal to the type width.
• CheckedSub
  Performs subtraction that returns None instead of wrapping around on underflow.
• Ensure
• EnsureAdd
  Performs addition that returns ArithmeticError instead of wrapping around on overflow.
• EnsureAddAssign
  Performs self addition that returns ArithmeticError instead of wrapping around on overflow.
• EnsureDiv
  Performs division that returns ArithmeticError instead of wrapping around on overflow.
• EnsureDivAssign
  Performs self division that returns ArithmeticError instead of wrapping around on overflow.
• EnsureFixedPointNumber
  Extends FixedPointNumber with the Ensure family functions.
• EnsureFrom
  Similar to TryFrom but returning an ArithmeticError error.
• EnsureInto
  Similar to TryInto but returning an ArithmeticError error.
• EnsureMul
  Performs multiplication that returns ArithmeticError instead of wrapping around on overflow.
• EnsureMulAssign
  Performs self multiplication that returns ArithmeticError instead of wrapping around on overflow.
• EnsureOp
  Meta trait that supports all immutable arithmetic Ensure* operations
• EnsureOpAssign
  Meta trait that supports all assigned arithmetic Ensure* operations
• EnsureSub
  Performs subtraction that returns ArithmeticError instead of wrapping around on underflow.
• EnsureSubAssign
  Performs self subtraction that returns ArithmeticError instead of wrapping around on underflow.
• IntegerSquareRoot
  A trait implementing integer square root.
• One
  Defines a multiplicative identity element for Self.
• SaturatedConversion
  Convenience type to work around the highly unergonomic syntax needed to invoke the functions of overloaded generic traits, in this case SaturatedFrom and SaturatedInto.
• Saturating
  Saturating arithmetic operations, returning maximum or minimum values instead of overflowing.
• Signed
  Useful functions for signed numbers (i.e. numbers that can be negative).
• UniqueSaturatedFrom
  Just like From except that if the source value is too big to fit into the destination type then it’ll saturate the destination.
• UniqueSaturatedInto
  Just like Into except that if the source value is too big to fit into the destination type then it’ll saturate the destination.
• Unsigned
  A trait for values which cannot be negative
• Zero
  Defines an additive identity element for Self.

Functions

• checked_pow
  Raises a value to the power of exp, returning None if an overflow occurred.
• ensure_pow
  Raises a value to the power of exp, returning ArithmeticError if an overflow occurred.