Architecture & LLD

Interpreter Pattern

Architecture & LLD Preview

Interpreter Pattern

Define a representation for the grammar of a language along with an interpreter to evaluate sentences.

Interpreter pattern models language grammar as a syntax tree of terminal and non-terminal expression nodes.

Core Design Challenge

"How do we parse and evaluate dynamic math expression strings securely without using dangerous eval functions?"

What You'll Learn:

  • Representing a language grammar as an abstract syntax tree
  • Evaluating terminal and non-terminal expression nodes
  • Building secure parsers without dangerous execution functions
  • Extending expression parsing with composite patterns
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