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* Lex identifiers after `case` as constants
Add a state for marking identifiers preceded by a `case` keyword as
constants.
Additionally, refactor the `label` rule to no longer permit a `case`
keyword before a label.
Consequentially, identifiers after a `case` keyword (like `foo` in
`case foo:`) are no longer wrongly lexed as `Name.Label`, but as
`Name.Constant`.
In addition, this fixes #2076, as multiple `case` keywords in one
line are lexed the same.
* Add test for multiple `case` keywords in one line
* Fix existing tests
* Lex `::` as Operator and not Name.Constant
After a `case`, when lexing a namespaced name, like `foo::bar`, lex the
namespace operator `::` as Operator, and not Name.Constant.
* Regenerate tokens
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The CFamilyLexer was matching whitespace as Text instead of Whitespace.
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* Fix lexing of function names
This fixes #1561.
Add a keywords state that matches inside and outside functions for
keywords.
Before this, when a keyword would appear the lexer would go to the
statements state, in which functions were not matched.
* Add tests for lexing of function names
* Unbreak previous tests
* Allow namespaced names in function statements
Add a second identifiers regex that matces all the previous identifiers
and also '::'.
I took the decision to create a second identifiers regex with '::'
inside, simply because using the old identifiers regex would hurt
performance massively on every solution I tried to craft.
* Add tests for namespaced names in functions
* Unbreak previous tests
* Add support for namespaces in namespace declarations
Add a namespace state that is entered each time the namespace keyword
is matched and lexes all name matches as namespaces.
Cases this approach doesn't cover:
* Namespaces in using declarations.
* Namespaces that prefix names in random code.
Unfortunately, in both of these cases the names before and after '::'
are not always namespaces.
* Add tests for namespace declartions
* Unbreak previous tests
* Tidy functions regex
Remove group nesting that became unneeded after fc56ab8 (the last big
refactor).
* Remove f string usage I introduced by mistake
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Co-authored-by: Georg Brandl <georg@python.org>
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