Backus-Naur Form (BNF) Definition
Quartus® Prime Help uses the Backus-Naur Form (BNF) to define the syntax of the text file formats and message variables. BNF uses the following notation:
|
Characters |
Meaning |
|---|---|
|
::= |
"Is defined as" |
|
<...> |
Identifiers (that is, variables) |
|
[...] |
Optional items |
|
{...} |
Repeated items (zero or more times) |
|
(...) |
Grouped items |
|
...|... |
Indicates a choice between items |
|
:n:n |
Suffix indicates a range (for example, <name_char>:1:8 means "from 1 to 8 name characters") |
|
Courier font |
Literal text in syntax descriptions. Courier font is used to help distinguish literal text from italic variables in syntax descriptions. |