Description: An expression parser is a component that interprets and evaluates expressions in a programming language. Its main function is to take a string of text representing a mathematical or logical expression and convert it into a data structure that can be evaluated by a program. This process involves breaking down the expression into its basic components, such as operators, operands, and parentheses, and constructing an abstract syntax tree (AST) that represents the hierarchy and relationship between these elements. Expression parsers are fundamental in programming languages, compilers, and code analysis tools, as they enable the manipulation and evaluation of expressions efficiently and accurately. Additionally, they are essential for implementing features such as formula evaluation in software applications, executing scripts in programming languages, and validating inputs in applications. In C++, expression parsers can be implemented using techniques such as top-down or bottom-up parsing and can be optimized to handle complex expressions and improve evaluation performance.
