Perl: Bit Operator "<<" is interpreted as #

9 years ago in General • updated by 9 years ago • 1

I have a *.pm-File with the line

$chScale = (1 << TSL2561_LUX_CHSCALE);

Textastic prints everything green below the bit-operator <<

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9 years ago

Hello,

in Perl, "<<" can start a heredoc string.

While the Perl interpreter can decide if this is indeed a Heredoc string or a shift left operator, a simple language grammar can't, because it doesn't know that TSL2561_LUX_CHSCALE is a constant.

If you save the constant in a variable first and use that to do the binary left shift, it is highlighted correctly:

$shift = TSL2561_LUX_CHSCALE;
$chScale = (1 << $shift);

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