The RenderMan Interface - Paul Bourke

statement:
variable definitions ;
assignexpression ;
procedurecall ;
return expression ;
loop modstmt ;
if relation statement
if relation statement else statement
loop control statement
loop control:
while relation
for ( expression ; relation ; expression )
solar ( [expressionlist] )
illuminate ( [expressionlist] )
illuminance ( [expressionlist] )
loop modstmt:
loop mod [integer]
loop mod:
break
continue
B.3 Expressions
The basic expressions are:
expressionlist:
expression [ , expressionlist ]
expression:
primary
expression binop expression
- expression
relation expression : expression
typecast expression
primary:
number
stringconstant
texture
identifier
identifier [arrayindex]
procedurecall
assignexpression
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