Commenting a function

To comment a function, add some lines starting with #+, before the function body. The comment body is composed of paragraphs separated by a blank line. The first paragraph of the comment is a short description of the function. This description will be placed in the function summary table. The next paragraph is long text describing the function in detail. Other paragraphs must start with a tag to identify the type of the paragraph; a tag starts with the @ "at" sign.

Table 1. Supported @ tags
Tag	Description
`@code`	Indicates that the next lines show a code example using the function.
`@param name description`	Defines a function parameter identified by name, explained by a description. name must match the parameter name in the function declaration.
`@returnType fglType [,...]`	Defines the data type of the value returned by the function. If the function returns several values, write a comma-separated list of types.
`@return description`	Describes the values returned by the function. Several @return comment lines can be written.

Example

#+ Compute the amount of the orders for a given customer
#+
#+ This function calculates the total amount of all orders for the
#+ customer identified by the cust_id number passed as parameter.
#+
#+ @code
#+ DEFINE total DECIMAL(10,2)
#+ LET total = ordersTotal(r_customer.cust_id)
#+
#+ @param cid Customer identifier
#+
#+ @returnType DECIMAL(10,2)
#+ @return The total amount as DECIMAL(10,2)
#+
FUNCTION ordersTotal(cid)
   DEFINE cid INTEGER
   DEFINE ordtot DECIMAL(10,2)
   SELECT SUM(ord_amount) INTO ordtot
        FROM orders WHERE orders.cust_id = cid
   RETURN ordtot
END FUNCTION