IBM Switch 15 Manual de usuario descargar pdf (Pagina 142)

132

Chapter 8

Operation Comments Precedence (se

e next section)

Used between two integers. The re sult

is the bitwise ‘and’ of the in t egers IN T1

and INT2.

&&~~

Used between two integers. The re sult

is the bitwise ‘and’ of INT1 and the

bitwise complement of INT2.

Used between two integers. The re sult

is the bitwise ‘inclusive or’ of INT1

and INT2.

Used in front of an integer. Produces

the bitwise complement of INT.

||/&

Used between two integers. The re sult

is the bi t wi se ‘exclusive or’ of INT1

and INT2.

INT1 << N

Used between two integers. Produ ces

the bit pattern of INT shifted left by N

positions.

INT1 >> N

Used between two integers. Produ ces

the bit pattern of INT shifted right by

N positions.

Used to divide one number by another:

NUM1 / N U M

Used between two numb ers : BA SE **

POWER. Returns BASE raised to the

power POWER.

rem

Used between two integers: INT1 rem

INT2. Returns the remainder, INT1 -

(INT1 div INT2) * INT2.

div

Used between two integers: INT1 div

INT2. Performs integer division.

Operator Precedence

Precedences dete r mine the parsing of complex exp r essions, especially unbracketed expressions

with more than one inﬁx operator. For example,

3 + 4 * 5

parses as 3 + (4 * 5) rather than (3 + 4) * 5 because the relative pr ecedences dictate that * is to be

parsed befo r e +. Every operator in the CLEM language has a precedence value associated with it;

the lower this value, the more important it is on the parsing list, meaning that it will be processed

sooner than other operators with higher precedence values.

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