16.10. A Sling Grammar
A Sling program is a series of statements:
statements = statement statement*;
These statements may be either assignment statements, for statements, or plot statements:
statement = assignment | forStatement | plotStatement; assignment = variable '=' expression ';' ; plotStatement = "plot" expression ';'; forStatement = "for" '(' variable ',' expression ',' expression ')' '{' statements '}';
A variable is any unreserved word; the reserved words in Sling are the elements shown in Figure 16.12.
variable = Word;
Expressions in Sling allow for normal arithmetic manipulation:
expression = term (plusTerm | minusTerm)*; plusTerm = '+' term; minusTerm = '-' term; term = element (timesElement | divideElement | remainderElement)*; ...
Get Building Parsers with Java™ now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.