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| Expression | Attribute | Description | 
|---|---|---|
| 
                     | n/a | 
                    Matches  | 
| 
                     | n/a | 
                    Matches  | 
| 
                     | n/a | 
                    Matches regular expression  | 
| 
                     | n/a | 
                    Matches regular expression  | 
| 
                     | 
                     | Matches the immediate argument | 
| 
                     | n/a | 
                    Matches any of the expressions  | 
| 
                     | 
                    Attribute of  | 
                    Call semantic action  | 
| ![[Note]](../../../images/note.png) | Note | 
|---|---|
| The column Attribute in the table above lists the parser attribute exposed by the lexer component if it is used as a parser (see Attribute). A 'n/a' in this columns means the lexer component is not usable as a parser. |