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1185.1.29
by Robert Collins
merge merge tweaks from aaron, which includes latest .dev |
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Deadly sins in tool design |
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http://gcc.gnu.org/wiki/DeadlySins |
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They don't directly apply, but many do correspond. |
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The "Deadly Sins" from P. J. Brown's *Writing Interactive Compilers and Interpreters*, Wiley 1979. We've committed them all at least once in GCC. |
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The deadly sins are: |
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1. to code before you think. |
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2. to assume the user has all the knowledge the compiler writer has. |
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3. to not write proper documentation. |
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4. to ignore language standards. |
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5. to treat error diagnosis as an afterthought. |
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6. to equate the unlikely with the impossible. |
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7. to make the encoding of the compiler dependent on its data formats. |
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8. to use numbers for objects that are not numbers. |
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9. to pretend you are catering to everyone at the same time. |
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10. to have no strategy for processing break-ins. |
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(A break-in is when you interrupt an interactive compiler, and |
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then possibly continue it later. This is meaningful in an |
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environment in which the compiler is run dynamically, such as |
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many LISP and some BASIC environments. It is not meaningful for |
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typical uses of C/C++ (although there was at least one |
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interactive C environment, from Sabre).) |
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(Perhaps this corresponds to handling user interrupts during |
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operation -- they should not leave anything in an inconsistent |
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state.) |
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11. to rate the beauty of mathematics above the usability of your |
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compiler. |
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12. to let any error go undetected. |
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13. to leave users to find the errors in your compiler. |
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