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Usual arithmetic conversions

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Many binary operators that expect operands of arithmetic or enumeration type cause conversions and yield result types in a similar way. The purpose is to yield a common type, which is also the type of the result. This pattern is called the usual arithmetic conversions.

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[edit] Definition

Usual arithmetic conversions are defined as follows:

[edit] Stage 1

Applies lvalue-to-rvalue conversion to both operands, the resulting prvalues are used in place of the original operands for the remaining process.

[edit] Stage 2

  • If either operand is of scoped enumeration type, no conversions are performed; if the other operand does not have the same type, the expression is ill-formed.
  • Otherwise, proceed to the next stage.
(since C++11)

[edit] Stage 3

  • If either operand is of