LALR-Parser

The compiler of the LALR Parser ( lookahead LR parser ) is a modified LR ( 1) parser. The so-called LR are combined (1 ) amounts of the same relation to a set.

The ratio is defined as follows:

In simple terms this means that the previously calculated LR ( 1) - point conditions are combined, the core is the same. The core has two states are identical, if the items of the two states to the follow amounts ( lookahead ) are identical.