Syntax Of Expressions

| iMatix home page
| Libero home page | Libero documentation
| << | < | > | >>

Libero
Version 2.32

Syntax Of Expressions

The :set and :declare commands assign the value of an expression to a variable. A couple of examples:

:declare $count = 0
:set $count = $count + 1

Libero handles the expression depending on the type of the variable:

If it is an int, it looks for an arithmetic expression.
If it is a string, it treats the whole expression as a string. Quotes are optional; you should use these if the string contains spaces.
If the variable is a variant, Libero tries to evaluate the expression as an arithmetic expression. If this works, the variable gets the resulting number as its new value. If this fails, the variable gets the string as its value. To be certain to assign a string, use quotes.

An arithmetic expression can include '+', '-', '*', '/', parentheses. All number are four-byte signed long values, i.e. fall into the range +2,147,483,647 to -2,147,483,648.

Things pretty much work as you would expect, I hope. In practice I always declare variables as int or string and put explicit quotes around strings.