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The <len> operator returns the width of an integer in bits, using the
same calculation as for packing an integer into a bit field.
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The width of a negative integer was previously being counted in the
same way as for a positive integer, by inverting the bits to make it a
positive integer and then finding the placement of the highest-order 1
bit.
The actual width of a negative integer will always be one greater than
this value however, because the highest-order 1 bit of an inverted
negative integer will always have directly above it a significant 0 bit
used as the sign bit.
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The language is now more general, the code is better structured, error
reporting is more detailed, and many new language features have
been implemented:
- conditional blocks
- first-class strings
- more expression operators
- binary literals
- negative values
- invocations in constant expressions
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