Delphi Error – E2026 Constant expression expected

Delphi 64 Views 1 Min Read

Delphi Compiler Error

E2026 Constant expression expected

Reason for the Error & Solution

The compiler expected a constant expression here, but the expression it found turned out not to be constant. 

program Produce;
const
  Message = 'Hello World!';
  WPosition = Pos('W', Message);
begin
end.

The call to Pos is not a constant expression to the compiler, even though its arguments are constants, and it could in principle be evaluated at compile time. 

program Solve;
const
  Message = 'Hello World!';
  WPosition = 7;
begin
end.

So in this case, we just have to calculate the right value for WPosition ourselves.

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