MySQL: Tokenize quoted schema object names, and escape characters, uniquely #1555
Changes in this patch:
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…iquely Changes in this patch: * Name.Quoted and Name.Quoted.Escape are introduced as non-standard tokens * HTML and LaTeX formatters were confirmed to provide default formatting if they encounter these two non-standard tokens. They also add style classes based on the token name, like "n-Quoted" (HTML) or "nQuoted" (LaTeX) so that users can add custom styles for these. * Removed "\`" and "\\" as schema object name escapes. These are relics of the previous regular expression for backtick-quoted names and are not treated as escape sequences. The behavior was confirmed in the MySQL documentation as well as by running queries in MySQL Workbench. * Prevent "123abc" from being treated as an integer followed by a schema object name. MySQL allows leading numbers in schema object names as long as 0-9 are not the only characters in the schema object name. * Add ~10 more unit tests to validate behavior. Closes pygments#1551
Also, add tests that confirm correct behavior. No tests failed before or after removing the '$' match in the regex, but now regexlint isn't complaining. Removing the '$' matching probably depends on the fact that Pygments adds a newline at the end of the input text, so there is always something after a bare integer literal.
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