[ruby-core:112988] [Ruby master Bug#19544] Custom quotes inconsistency
Issue #19544 has been reported by hurricup (Alexandr Evstigneev). ---------------------------------------- Bug #19544: Custom quotes inconsistency https://bugs.ruby-lang.org/issues/19544 * Author: hurricup (Alexandr Evstigneev) * Status: Open * Priority: Normal * Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN ---------------------------------------- According to `parse_percent` in `parse.y`: For `%` we should be able use ascii non alphanumeric delimiters. But, `p % jim beam ;` does not work. Presumably because of some look-ahead distincting `%` from percent-string starter. Seems it is the same for any `\s` after `%` For the explicit `%` construction, with type specifier `%[QqWwIisrx]` we should be able to use non-alphanumeric ascii characters, which includes `\s`. But: This works: ``` p %s jim beam ``` And this does not: ``` p %w jim\ beam ``` with unterminated list error. First seems unavoidable, but second looks like obvious error of finding terminating `\n` -- https://bugs.ruby-lang.org/
Issue #19544 has been updated by mame (Yusuke Endoh).
Presumably because of some look-ahead distincting % from percent-string starter
It depends on the lex state, not look-ahead. If you place `%` in a context where the beginning of an expression is expected, you can write %-literal with spaces as delimiters. ``` p(% foo ) #=> "foo" p(% jim\ beam ) #=> "jim beam" ``` `%w` cannot be used with a space delimiter because it interprets all whitespace characters as a word delimiter. ---------------------------------------- Bug #19544: Custom quotes inconsistency https://bugs.ruby-lang.org/issues/19544#change-102519 * Author: hurricup (Alexandr Evstigneev) * Status: Open * Priority: Normal * Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN ---------------------------------------- According to `parse_percent` in `parse.y`: For `%` we should be able use ascii non alphanumeric delimiters. But, `p % jim beam ;` does not work. Presumably because of some look-ahead distincting `%` from percent-string starter. Seems it is the same for any `\s` after `%` For the explicit `%` construction, with type specifier `%[QqWwIisrx]` we should be able to use non-alphanumeric ascii characters, which includes `\s`. But: This works: ``` p %s jim beam ``` And this does not: ``` p %w jim\ beam ``` with unterminated list error. First seems unavoidable, but second looks like obvious error of finding terminating `\n` -- https://bugs.ruby-lang.org/
Issue #19544 has been updated by hurricup (Alexandr Evstigneev). mame (Yusuke Endoh) wrote in #note-1:
Presumably because of some look-ahead distincting % from percent-string starter
It depends on the lex state, not look-ahead. If you place `%` in a context where the beginning of an expression is expected, you can write %-literal with spaces as delimiters.
``` p(% foo ) #=> "foo" p(% jim\ beam ) #=> "jim beam" ```
`%w` cannot be used with a space delimiter because it interprets all whitespace characters as a word delimiter.
Thank you! This sounds reasonable. Then feels that list-like quotations ops `[WwIi]` should error about `\s` term, not unterminated list, which may be confusing. ---------------------------------------- Bug #19544: Custom quotes inconsistency https://bugs.ruby-lang.org/issues/19544#change-102521 * Author: hurricup (Alexandr Evstigneev) * Status: Open * Priority: Normal * Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN ---------------------------------------- According to `parse_percent` in `parse.y`: For `%` we should be able use ascii non alphanumeric delimiters. But, `p % jim beam ;` does not work. Presumably because of some look-ahead distincting `%` from percent-string starter. Seems it is the same for any `\s` after `%` For the explicit `%` construction, with type specifier `%[QqWwIisrx]` we should be able to use non-alphanumeric ascii characters, which includes `\s`. But: This works: ``` p %s jim beam ``` And this does not: ``` p %w jim\ beam ``` with unterminated list error. First seems unavoidable, but second looks like obvious error of finding terminating `\n` -- https://bugs.ruby-lang.org/
Issue #19544 has been updated by hurricup (Alexandr Evstigneev). mame (Yusuke Endoh) wrote in #note-1:
`%w` cannot be used with a space delimiter because it interprets all whitespace characters as a word delimiter.
Also, it could be usable, because space may be used as delimiter and `\n` as word separator and vice versa. ---------------------------------------- Bug #19544: Custom quotes inconsistency https://bugs.ruby-lang.org/issues/19544#change-102522 * Author: hurricup (Alexandr Evstigneev) * Status: Open * Priority: Normal * Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN ---------------------------------------- According to `parse_percent` in `parse.y`: For `%` we should be able use ascii non alphanumeric delimiters. But, `p % jim beam ;` does not work. Presumably because of some look-ahead distincting `%` from percent-string starter. Seems it is the same for any `\s` after `%` For the explicit `%` construction, with type specifier `%[QqWwIisrx]` we should be able to use non-alphanumeric ascii characters, which includes `\s`. But: This works: ``` p %s jim beam ``` And this does not: ``` p %w jim\ beam ``` with unterminated list error. First seems unavoidable, but second looks like obvious error of finding terminating `\n` -- https://bugs.ruby-lang.org/
Issue #19544 has been updated by nobu (Nobuyoshi Nakada). Status changed from Open to Closed Fixed at commit:ac8a16237c727ae2a1446ef6dc810d0e750971fb. ---------------------------------------- Bug #19544: Custom quotes inconsistency https://bugs.ruby-lang.org/issues/19544#change-103812 * Author: hurricup (Alexandr Evstigneev) * Status: Closed * Priority: Normal * Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN ---------------------------------------- According to `parse_percent` in `parse.y`: For `%` we should be able use ascii non alphanumeric delimiters. But, `p % jim beam ;` does not work. Presumably because of some look-ahead distincting `%` from percent-string starter. Seems it is the same for any `\s` after `%` For the explicit `%` construction, with type specifier `%[QqWwIisrx]` we should be able to use non-alphanumeric ascii characters, which includes `\s`. But: This works: ``` p %s jim beam ``` And this does not: ``` p %w jim\ beam ``` with unterminated list error. First seems unavoidable, but second looks like obvious error of finding terminating `\n` -- https://bugs.ruby-lang.org/
participants (3)
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hurricup (Alexandr Evstigneev) -
mame (Yusuke Endoh)
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nobu (Nobuyoshi Nakada)