Translations:Development/KDevelop-PG-Qt Introduction/148/en: Difference between revisions

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In theory such behavior might be unexpected: In BNF e.g. the above syntax would be enough and the parser would automatically jump back and retry with the next rule, here ''class_definition''. But in practice such behaviour is ''- most of the time -'' not necessary and would slow down the parser. If however such behavior is explicitly what you want, you can use an explicit backtracking syntax in your grammar:

In theory such behavior might be unexpected: In BNF e.g. the above syntax would be enough and the parser would automatically jump back and retry with the next rule, here class_definition. But in practice such behaviour is - most of the time - not necessary and would slow down the parser. If however such behavior is explicitly what you want, you can use an explicit backtracking syntax in your grammar: