| ||1 minute, 52 seconds||Expressions, Types, and Functions - slide 7 : 46|
Evaluation of parenthesized expressions
How is the form (a b c d e) evaluated in Scheme?
- Evaluation rules
- The evaluation of the empty pair of parentheses ( ) is in principle an error
- If a is the name of a special form, such as lambda, if, cond, or define special rules apply
- In all other cases:
- Evaluate all subforms uniformly and recursively.
- The value of the first constituent a must be a function object. The function object is called with the values of b, c, d, and e as actual parameters.