isExpr
isExpr is a function commonly found in programming language parsers and Abstract Syntax Tree (AST) manipulation libraries. Its primary purpose is to determine if a given node or token represents an expression. An expression is a piece of code that evaluates to a value. This contrasts with statements, which perform an action.
The `isExpr` function typically takes a node or token as input and returns a boolean value: true
In practice, `isExpr` is crucial for tasks such as syntax validation, code analysis, and transformation. For