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at:tutorial:metaprogramming [2007/07/27 07:45] jdedecker |
at:tutorial:metaprogramming [2007/10/08 13:27] tvcutsem * |
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==== Quasiquoting and splicing ==== | ==== Quasiquoting and splicing ==== | ||
+ | Quasiquoting and splicing are an advanced and powerful metaprogramming techniques that control the evaluation process and allow one to manipulate the evaluation process of the abstract syntax tree. | ||
- | === Qouting | + | === Quoting |
Any valid AmbientTalk expression can be quoted. This prevents the expression from being evaluated. Instead, it is returned literally. | Any valid AmbientTalk expression can be quoted. This prevents the expression from being evaluated. Instead, it is returned literally. | ||
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== Expressions == | == Expressions == | ||
- | To quote a complete expression, it has to be wrapped in parantheses: | + | To quote a complete expression, it has to be wrapped in parentheses: |
< | < | ||
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With this construct, all the elements of the literal table are evaluated. By quoting a literal table, all the elements are quoted instead of evaluated: | With this construct, all the elements of the literal table are evaluated. By quoting a literal table, all the elements are quoted instead of evaluated: | ||
< | < | ||
- | > | + | > |
>> | >> | ||
</ | </ |