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make symbol NOP iterable Approved-by: Jose Rodriguez <boriel@gmail.com>
This also allows omitting END IF in one-line ifs
* Remove TODO from api/optimize.py * Add code regions for FOR and IF sentences * Put <step> definition within FOR region
IF a block in the THEN part is accessed also from a GOTO statement (yes, dirty programming but possible), this block cannot be removed.
IF a block in the ELSE part is accessed also from a GOTO statement (yes, dirty programming but possible), this block cannot be removed.
Now the optimizer centralizes al IF optimization. Also allows now empty ELSE after ELSEIF
While optimization must not remove empty WHILE statements if the condition is always true. The infinite loop might be intended by the user. Also, when removing a WHILE sentence (always false), it must be checked the body is not accessed with a GOTO or the like.
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Apr 3, 2019
Added badges to README.md file Approved-by: Jose Rodriguez <boriel@gmail.com>
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This is a BIG change.
After so long, finally ZX Basic allows IF THEN with no trailing END IF.