A compiler curiosity I've learned today:

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A compiler curiosity I've learned today:

// This works:
{$IF Declared(Test) and (Test>=100)}
{$ENDIF}

// This not:
{$IF Declared(Test)}
{$IF Test>=100} // "E2026 Constant expression expected"
{$ENDIF}
{$ENDIF}

Comments

  1. Jeroen Wiert PluimersApril 20, 2017 at 9:52 AM

    What doesn't work? i.e. do you get an error, is some code included that shouldn't? something else?

    ReplyDelete
  2. David BernedaApril 20, 2017 at 9:56 AM

    Yes, error "E2026 Constant expression expected" at "$IF Test..."

    ReplyDelete
  3. Stefan GlienkeApril 20, 2017 at 10:22 AM

    Looks like the compiler is evaluating the $IF despite being in a block that should not.

    Funny enough I get a W1023 when Test is not declared in the first version facepalm

    ReplyDelete
  4. David BernedaApril 20, 2017 at 10:24 AM

    Stefan Glienke yes, forgot about that. The 1023 warning disappears adding a + in front of 100

    ReplyDelete
  5. Joaquin Menemene (Jade)April 20, 2017 at 12:56 PM

    Did you try $IF (Test>=100) ? I don't have an IDE at hand right now

    ReplyDelete
  6. David BernedaApril 20, 2017 at 12:57 PM

    Joaquin Menemene yes, parenthesis or spacing aren't important

    ReplyDelete
  7. Nicholas RingApril 20, 2017 at 2:11 PM

    /weird...

    ReplyDelete
  8. Lars FosdalApril 20, 2017 at 2:59 PM

    Sounds like a new QP case.

    ReplyDelete
  9. David BernedaApril 20, 2017 at 11:47 PM

    Lars Fosdal Done: https://quality.embarcadero.com/browse/RSP-17914

    ReplyDelete

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