X hits on this document

807 views

0 shares

0 downloads

0 comments

157 / 396

C# LANGUAGE SPECIFICATION

int operator +(int x, int y); uint operator +(uint x, uint y); long operator +(long x, long y); ulong operator +(ulong x, ulong y);

In a checked context, if the sum is outside the range of the result type, a System.OverflowException is thrown. In an unchecked context, overflows are not reported and any significant high-order bits outside the range of the result type are discarded.

Floating-point addition:

float operator +(float x, float y); double operator +(double x, double y);

The sum is computed according to the rules of IEEE 754 arithmetic. The following table lists the results of all possible combinations of nonzero finite values, zeros, infinities, and NaN’s. In the table, x and y are nonzero finite values, and z is the result of x + y. If x and y have the same magnitude but opposite signs, z is positive zero. If x + y is too large to represent in the destination type, z is an infinity with the same sign as x + y.

y

+0

–0

+∞

–∞

NaN

x

z

x

x

+∞

–∞

NaN

+0

y

+0

+0

+∞

–∞

NaN

–0

y

+0

–0

+∞

–∞

NaN

+∞

+∞

+∞

+∞

+∞

NaN

NaN

–∞

–∞

–∞

–∞

NaN

–∞

NaN

NaN

NaN

NaN

NaN

NaN

NaN

NaN

Decimal addition:

decimal operator +(decimal x, decimal y);

If the resulting value is too large to represent in the decimal format, a System.OverflowException is thrown. The scale of the result, before any rounding, is the larger of the scales of the two operands.

Decimal addition is equivalent to using the addition operator of type System.Decimal.

Enumeration addition. Every enumeration type implicitly provides the following predefined operators, where E is the enum type, and U is the underlying type of E:

E operator +(E x, U y); E operator +(U x, E y);

The operators are evaluated exactly as (E)((U)x + (U)y).

String concatenation:

string operator +(string x, string y); string operator +(string x, object y); string operator +(object x, string y);

The binary + operator performs string concatenation when one or both operands are of type string. If an operand of string concatenation is null, an empty string is substituted. Otherwise, any non-string argument is converted to its string representation by invoking the virtual ToString method inherited from type object. If ToString returns null, an empty string is substituted.

using System;

144Copyright Microsoft Corporation 1999-2003. All Rights Reserved.

Document info
Document views807
Page views807
Page last viewedSun Dec 04 04:05:30 UTC 2016
Pages396
Paragraphs9401
Words133190

Comments