Reject bare-bracket syntax in strict2 and introduce self keyword

Add bare-bracket rejection to Parser#expression in strict2 mode, so that
`['var']` is disallowed and `self['var']` is the required syntax.

- Add `Expression::SELF` constant ('self')
- Add `Parser#reject_bare_brackets` option, checked in `expression`
- Add `ParseContext#reject_bare_brackets?` and `force_reject_bare_brackets`
- Add `VariableLookupDrop` for `self['var']` scope-chain lookups
- Add `Variable#==` for rewriter state comparison
- Update `Context#find_variable` to return `VariableLookupDrop` for `self`

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>
This commit is contained in:
Alok Swamy
2026-03-23 12:13:59 -04:00
co-authored by Claude Opus 4.6
parent dd37353cca
commit 532b439063
9 changed files with 71 additions and 9 deletions
+2 -2
View File
@@ -296,8 +296,8 @@ class ContextTest < Minitest::Test
end
def test_access_variable_with_hash_notation
assert_template_result('baz', '{{ ["foo"] }}', { "foo" => "baz" })
assert_template_result('baz', '{{ [bar] }}', { 'foo' => 'baz', 'bar' => 'foo' })
assert_template_result('baz', '{{ foo }}', { "foo" => "baz" })
assert_template_result('baz', '{{ self[bar] }}', { 'foo' => 'baz', 'bar' => 'foo' })
end
def test_access_hashes_with_hash_access_variables