Description |
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Operator representations may require one, two, or three characters.
The compiler matches the longest sequence to find tokens. For example,
is parsed as if it had been written
which results in a syntax error. An alternate parse
is not chosen because it does not follow the longest first
rule, even though it results in a syntactically correct expression.
As a result, white space is often important in writing expressions
that use complex operators. The precedence of operators is discussed
in more detail in Chapter 5 “Expressions ”.
The obsolete form of the assignment operators (=*
instead of *=)
is not supported. If this form is used, the compiler parses it as
two tokens (=
and *).
The operators [ ], ?:,
and ( ) (function
call operator) occur only in pairs, possibly separated by expressions.
You can use some operators as either binary operators or unary operators.
Often the meaning of the binary operator is much different from
the meaning of the unary operator. For example, binary multiply
and unary indirection:
