PowerD.html - RAISE definition

Description:
RAISE keyword allows You to predefine exception and exceptioninfo variables that will be set when given function will return given variable with given condition.
Syntax:
```
  RAISE <exc> [ ,<exci> ] IF <func>()<cond><value>
```
where: <exc> and <exci> are values contained in exception and exceptioninfo variables. <func> is given function name. <cond> is one of: =, <, >, =<, => or <>. <value> is value returned by <func>. If <value><cond>itioned with returned function value is true, exception will be proceeded.

Example:

  RAISE "FILE" IF Open()=NIL,
        "MEM"  IF AllocVec()=NIL

  f:=Open('ram:file',OLDFILE)
  m:=AllocVec(256,0)

is the same as:

  IF (f:=Open('ram:file',OLDFILE))=NIL THEN Raise("FILE")
  IF (m:=AllocVec(256,0))=NIL THEN Raise("MEM")