syntax - Is it possible to use guards in function definition in idris? -

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हैस्केल में, एक लिख सकता है: 

  containsTen :: Num a = & gt; ईक ए = & gt; [ए] - & gt; बूल में शामिल हैं ten (x: y: xs) | X + y == 10 = सत्य | अन्यथा = गलत

क्या आईडीआरसी में कोई समकक्ष लिखना संभव है, इसे ifThenElse के साथ किए बिना (मेरा असली मामला ऊपर एक से अधिक जटिल है)? < / P>

इड्रिस के पास पैकेट गार्ड नहीं हैं, जैसा कि हैक्लेल में ठीक है। के साथ खंड है जो वाक्यविन्यास रूप से समान है (लेकिन अधिक शक्तिशाली क्योंकि यह निर्भर प्रकारों की उपस्थिति में मिलान का समर्थन करता है): 

  इसमें शामिल हैं: संख्या = = एक सूची - & gt; बूल में टीन (एक्स :: यू :: एक्सएस) के साथ (एक्स + वाई) हैं | 10 = सच | _ = ग़लत

आप अनुभाग 7 दृश्य और "के साथ" नियम पर एक नज़र डाल सकते हैं।


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