JCL Help:JclExprEval.pas

 JCL Help: JclExprEval.pas

ExprEval

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Summary

This unit contains three expression evaluators, each tailored for different usage patterns. It also contains the component objects, so that a customized expression evaluator can be assembled relatively easily.

Description

The key classes are TEvaluator, TCompiledEvaluator and TExpressionCompiler.

• For single evaluations of multiple expressions, use TEvaluator.
• For many evaluations of the same expression, use TCompiledEvaluator.
• For many evaluations of many expressions, use TExpressionCompiler.Customized evaluators can be put together from constituent parts.

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Donator

Barry Kelly

Contributors

Barry Kelly Matthias Thoma Petr Vones Robert Marquardt Robert Rossmair

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