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72 lines
2.6 KiB
ObjectPascal
72 lines
2.6 KiB
ObjectPascal
{
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***************************************************************************
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* *
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* This source is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This code is distributed in the hope that it will be useful, but *
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* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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* General Public License for more details. *
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* *
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* A copy of the GNU General Public License is available on the World *
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* Wide Web at <http://www.gnu.org/copyleft/gpl.html>. You can also *
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* obtain it by writing to the Free Software Foundation, *
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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* *
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***************************************************************************
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Author: Mattias Gaertner
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Abstract:
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Demonstrating the TExpressionEvaluator, used for FPC conditionals.
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}
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program TestExprEval;
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{$mode objfpc}{$H+}
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uses
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Classes, SysUtils, FileProcs, ExprEval;
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var
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e: TExpressionEvaluator;
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procedure Test(Expr, ExpectedResult: string);
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var
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OldResult, NewResult: String;
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begin
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DebugLn(['Test Expression="',expr,'"']);
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OldResult:=e.EvalOld(Expr);
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NewResult:=e.Eval(Expr);
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DebugLn(['Test eval2 OldResult="',OldResult,'" NewResult="',NewResult,'"']);
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if NewResult<>ExpectedResult then
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DebugLn(['FATAL: Expression="',expr,'" ExpectedResult="',ExpectedResult,'" <> NewResult="',NewResult,'"']);
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end;
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begin
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e:=TExpressionEvaluator.Create;
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e.Variables['A']:='123';
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Test('defined A','1');
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Test('defined(A)','1');
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Test('undefined(A)','0');
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Test('not undefined(A)','1');
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Test('not defined A','0');
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Test('A or B','1');
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Test('defined(B)','0');
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Test('B or A','1');
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Test('defined(B) or defined(A)','1');
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Test('defined(B) or not defined(A)','0');
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Test('not defined(B) or not defined(A)','1');
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Test('not defined(B) or defined(A)','1');
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Test('1 << 2','4');
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Test('4 >> 1','2');
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Test('4 = ''4''','1');
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Test('(1+1)=2','1');
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Test('(1+(2+4))=7','1');
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Test('(1+2*3)=7','1');
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e.Free;
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end.
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