Shift/Reduce demonstration - 0 [Happy]

Happy is a LALR(1) parser.

Left Associativity

The production (as shown).
Two expressions ( 1 + 1 + 1, and 1 + 1 * 1)  are demonstrated.

 

Finally, Exp3 will be reduced to Expression.

Right Associativity

The production (as shown).
One expression ( 1 + 1 + 1)  is demonstrated.

Finally, Exp3 will be reduced to Expression.