Sketchpad Expression Syntax Diagrams
The following syntax diagrams represent the grammar of Sketchpad
calculation expressions. This grammar is used to parse expressions
on Web Sketchpad both for evaluation and presentation. The diagrams
were generated from an online tool at
railroad.my28msec.com .
start:
expr
no references
expr:
term + - referenced by:
term:
powerExpr / * referenced by:
powerExpr:
factor ^ powerExpr referenced by:
factor:
unaryExpr ( expr ) primary referenced by:
unaryExpr:
function - term referenced by:
function:
funcname ( expr ) reference ( expr ) referenced by:
primary:
constant _ unitname reference referenced by:
constant:
- digit . digit - digit . - . digit - digit pi \\u3C0 e referenced by:
_:
whitespace referenced by:
reference:
@ alphabetic digit referenced by:
unitname:
distanceunitname angleunitname referenced by:
funcname:
sin cos tan Arcsin Arccos Arctan abs sqrt ln log sign round trunc referenced by:
alphabetic:
a b c d e f g h i j k l m n o p q r s t u v w x y z A B C D E F G H I J K L M N O P Q R S T U V W X Y Z referenced by:
digit:
0 1 2 3 4 5 6 7 8 9 referenced by:
distanceunitname:
pixels cm inches in. referenced by:
angleunitname:
radians ° referenced by:
whitespace:
\t \n \r referenced by: