This page lists the available CLEM language operators.
Table 1. CLEM language
operators
Operation
Comments
Precedence (see next section)
or
Used between two CLEM expressions. Returns a value of true if either is true or if both are
true.
10
and
Used between two CLEM expressions. Returns a value of true if both are true.
9
=
Used between any two comparable items. Returns true if ITEM1 is equal to ITEM2.
7
==
Identical to =.
7
/=
Used between any two comparable items. Returns true if ITEM1 is not equal to
ITEM2.
7
/==
Identical to /=.
7
>
Used between any two comparable items. Returns true if ITEM1 is strictly greater than
ITEM2.
6
>=
Used between any two comparable items. Returns true if ITEM1 is greater than or equal to
ITEM2.
6
<
Used between any two comparable items. Returns true if ITEM1 is strictly less than
ITEM2
6
<=
Used between any two comparable items. Returns true if ITEM1 is less than or equal to
ITEM2.
6
&&=_0
Used between two integers. Equivalent to the Boolean expression INT1 && INT2 =
0.
6
&&/=_0
Used between two integers. Equivalent to the Boolean expression INT1 && INT2 /=
0.
6
+
Adds two numbers: NUM1 + NUM2.
5
><
Concatenates two strings; for example,
STRING1 >< STRING2.
5
-
Subtracts one number from another: NUM1 - NUM2. Can also be used in front of a number: -
NUM.
5
*
Used to multiply two numbers: NUM1 * NUM2.
4
&&
Used between two integers. The result is the bitwise 'and' of the integers INT1 and
INT2.
4
&&~~
Used between two integers. The result is the bitwise 'and' of INT1 and the bitwise complement
of INT2.
4
||
Used between two integers. The result is the bitwise 'inclusive or' of INT1 and INT2.
4
~~
Used in front of an integer. Produces the bitwise complement of INT.
4
||/&
Used between two integers. The result is the bitwise 'exclusive or' of INT1 and INT2.
4
INT1 << N
Used between two integers. Produces the bit pattern of INT shifted left by N
positions.
4
INT1 >> N
Used between two integers. Produces the bit pattern of INT shifted right by N
positions.
4
/
Used to divide one number by another: NUM1 / NUM2.
4
**
Used between two numbers: BASE ** POWER. Returns BASE raised to the power POWER.
3
rem
Used between two integers: INT1 rem INT2. Returns the remainder, INT1 - (INT1 div INT2) *
INT2.
2
div
Used between two integers: INT1 div INT2. Performs integer division.
2
Operator precedence
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Precedences determine the parsing of complex expressions, especially
unbracketed expressions with more than one infix operator. For example,
3 + 4 * 5
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parses as 3 + (4 * 5) rather than (3 + 4) *
5 because the relative precedences dictate that * is to be parsed before
+. Every operator in the CLEM language has a precedence value associated with it;
the smaller this value, the more important it is on the parsing list, meaning that it will be
processed sooner than other operators with larger precedence values.
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