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    Reference for unit 'fpExprPars'

    Provides expression parsing with support for variables, functions, and mathematical operations

    uses

    Used units Description
    System
    Classes
    sysutils
    Contnrs Various general purpose classes: stack, queue, objectlists.

    Overview

    This unit implements an expression parser and evaluator that supports a wide variety of data types, mathematical operations, and built-in functions. It provides the infrastructure for parsing and evaluating mathematical expressions with support for variables, functions, and complex data types.

    The parser supports the following features:

    • Multiple data types: integers, floats, strings, booleans, dates, and currency
    • Standard mathematical operators: +, -, *, /, mod, power
    • Comparison operators: =, <>, <, >, <=, >=
    • Logical operators: and, or, xor, not
    • Built-in mathematical, string, and date/time functions comparable to what exists in the SysUtils unit.
    • Variable and function definitions
    • Conditional expressions (if-then-else)
    • Aggregate functions for data processing

    The unit is designed to be extensible, allowing custom functions and variables to be registered with the parser for specialized applications.