Explicit octal notation for integers #6360
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Girgias
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nikic
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Zend/zend_language_scanner.l
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| /* zend_oct_strtod skips leading '0' */ | ||
| ZVAL_DOUBLE(zendlval, zend_oct_strtod(octal, (const char **)&end)); | ||
| ZEND_ASSERT(!errno); | ||
| /* errno isn't checked since we allow HUGE_VAL/INF overflow */ |
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Mismatch between this comment and the preceding assert. Can you please add a test for a very large octal literal that overflows to INF?
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Will do, I'm adding a bunch of tests for the other integer literals while I'm at it.
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nikic
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Jan 4, 2021
| strip_underscores(octal, &len); | ||
| } | ||
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| /* Reset errno */ |
| echo 'Octal to decimal:', \PHP_EOL; | ||
| var_dump(base_convert('0o', 8, 10)); | ||
| var_dump(base_convert('0O', 8, 10)); | ||
| var_dump(base_convert('0', 8, 10)); // This is somehow deprecated???? |
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Ah right, that was when I messed up by confusing 0 and O ... will drop it
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This add support for the explicit octal notation using a `0o`/`0O` prefix as supported in PHP as of PHP 8.1. The only method which needed adjusting was the `Numbers::getCompleteNumber()` method, which now backfills the tokenization when needed. For the `Numbers::isOctalInt()` method, a small tweak to the regex was all that was needed. As for the `Numbers::getDecimalValue()` method: this already handled the conversion correctly due to the use of the PHP native `octdec()` function. From the RFC: > Surprisingly PHP already has support for this notation when using the `octdec()` and `base_convert()` functions. Includes adding unit tests to safeguard support in all relevant methods in the class. Refs: * https://wiki.php.net/rfc/explicit_octal_notation * php/php-src#6360 * squizlabs/PHP_CodeSniffer#3481 * squizlabs/PHP_CodeSniffer#3552
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…niff > **Integer Octal Literal Prefix** > > Octal integers can now use an explicit `0o`/`0O` prefix in integer literals, similarly to binary and hexadecimal integer literals. Includes unit tests. Includes documentation. Refs: * https://www.php.net/manual/en/migration81.new-features.php#migration81.new-features.core.octal-literal-prefix * https://wiki.php.net/rfc/explicit_octal_notation * php/php-src#6360 * php/php-src@589bdf3
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…niff > **Integer Octal Literal Prefix** > > Octal integers can now use an explicit `0o`/`0O` prefix in integer literals, similarly to binary and hexadecimal integer literals. Includes unit tests. Includes documentation. Refs: * https://www.php.net/manual/en/migration81.new-features.php#migration81.new-features.core.octal-literal-prefix * https://wiki.php.net/rfc/explicit_octal_notation * php/php-src#6360 * php/php-src@589bdf3
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RFC still needs to be written butthe primary motivation is that"016" == 016is equal to false as016is interpreted as an octal integer and can be surprising.RFC: https://wiki.php.net/rfc/explicit_octal_notation
Albeit PHP's way of dealing with octal is well established (C, Java, Golang, Haskell, etc.) other languages provide the
0oprefix for octal integer analogous to0band0xfor binary and hexadecimal integers.TODO: Add support for:
filter_var('0o77', FILTER_VALIDATE_INT, FILTER_FLAG_ALLOW_OCTAL)octdec('0o77')(Actually PHP already supports this)References: