Removing Direct and Indirect Left Recursion From Context-Free Grammar (CFG)
In this video, we learn how to remove direct and indirect left recursion from a Context-Free Grammar (CFG). Left recursion poses challenges for top-down parsing and can potentially result in an infinite loop. Initially, we introduce a general rule for eliminating various types of left recursions. Subsequently, we illustrate each step with an example to ensure clarity in understanding.
The primary references used in this video are:
1) Moore, Robert C. "Removing left recursion from context-free grammars." Proceedings of the 1st Meeting of the North American Chapter of the Association for Computational Linguistics, 2000.
2) Aho, Alfred V., Ravi Sethi, and Jeffrey D. Ullman. "Compilers—principles, techniques, and tools." Pearson Addison Wesley Longman, 1986.
#compiler_design #compiler #compiler_techniques
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