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* match: bug: lexical symbol macros neglectedKaz Kylheku2023-07-271-0/+19
| | | | | | | | | | | | | | | | | | When a pattern variable match like @foo references a global symbol macro, that's treated as an existing expression to match, and not a new binding. However, local symbol macros are not treated this way; they are invisible to variable patterns. That is an unintended inconsistency. * stdlib/match.tl (var-list exists): Use lexical-binding-kind rather than lexical-var-p. This returns true for lexical symbol macros also. * tests/011/patmatch.tl: New test cases. * txr.1: Documentation revised to clarify that both global and local symbol macros are considered to be existing variable bindings by pattern matching.
* tests: match: move file compiling step to end.Kaz Kylheku2023-07-261-6/+6
| | | | | | * tests/011/patmatch.tl: Move the form which compiles the entire file to the end of the file, so that all the interpreted test cases complete before we compile.
* New macro: match-cond.Kaz Kylheku2023-06-121-0/+14
| | | | | | | | | | | | | * stdlib/match.tl (match-cond): New macro. * autoload.c (match_set_entries): match-cond triggers autoload of match module. * tests/011/patmatch.tl: Tests. * txr.1: Documented. * stdlib/doc.tl: Updated.
* expander: support param macros in nested macro param lists.Kaz Kylheku2023-05-271-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Parameter list macros work in inside macro parameter lists, like they do in function parameter lists. However, they ony work at the top level. Macro parameter lists are nested; they may contain nested parameter lists that match corresponding shapes in the argument list. This patch extends parameter list macros to work in nested macro parameter lists. * eval.c (expand_opt_params_rec, expand_params_rec): These two functions must be extended to take a body argument, and to return not just an expanded parameter list but a parameter list accompanied by a body. We do that by making them return a cons cell, whose car is the expanded parameter list and the cdr is the possibly transformed body. Additionally, these functions now call expand_param_macro on nested macro parameter lists. (expand_params): This function becomes slightly simpler as a result of the above changes. Because expand_params_rec already returns a cons cell holding a parameter list and body, we just return that as-is. * tests/011/keyparams.tl: Added some tests of this, vie the standard :key parameter list macro. A macro is tested which has a nested (:key ...) parameter list in a required parameter position as well as in an optional position. * txr.1: Documented.
* label/flet: bug: empty case wallops symbol macros.Kaz Kylheku2023-05-241-0/+5
| | | | | | | | | | | | | | * eval.c (make_var_shadowing_env): We cannot return the original env in the empty variable case, but earnestly make a new one. This function is used by the expander when walking the lbind/fbind special from emitted by labels/flet. That form clobbers the environment via make_fun_shadowing_env, which calls make_var_shadowing_env and then destructively moves the variable bindings to the function binding slot of the environment. The manifestation is that when we have (symacrolet ((x 1)) (labels () x)), the x fails to expand; it has been wrongly moved to the function bindings area of the macro environment.
* match: ^#S() and ^#H(()) patterns must workKaz Kylheku2023-04-291-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Quasiquote patterns not containing unquotes are not working, because the parser transforms them into quoted objects. For instance ^#S(time) becomes the form (quote #S(time)) and not the form (sys:qquote (sys:struct-lit time)). The pattern matching compiler doesn't treat quote specially, only sys:qquote. * parser.y (unquotes_occur): Function removed. (vector, hash, struct, tree, json_vals, json_pairs): Remove use of unquotes_occur. Thus vector, hash, struct, tree and JSON syntax occurring within a backquote will be turned into a special literal whether or not it contains unquotes. * lib.c (obj_print_impl): Do not print the form (sys:hash-lit) as #Hnil, but #H(). * stdlib/match.tl (transform-qquote): Add a case which will handle ^#H(), as if it were ^H(()). Bugfix in the ^H(() ...) case. The use of @(coll) means it fails to match the empty syntax when no key/value pairs are specified, whereas @(all) respects vacuous truth. * test/011/patmatch.tl: A few tests. * y.tab.shipped, y.tab.h.shipped: Updated.
* match: support @nil in predicates.Kaz Kylheku2023-03-231-0/+8
| | | | | | | | | | | | | | | | | For instance @(<= 10 @nil 20) is a pattern which matches a number between 10 and 20, without binding a variable. * stdlib/match.tl (compile-predicate-match): Looks like this code was already halfway expressing the intent that the avar could be nil, because arg-var takes the value of avar if that is non-nil, otherwise a gensym is substituted. What was missing was that the gensym that replaces nil must also be substituted into the predicate. * tests/011/patmatch.tl: New tests. * txr.1: Document that the variable embedded in a predicate may be null.
* tests: squelch unused variable warnings.Kaz Kylheku2023-03-232-2/+3
| | | | | | | | | | | | | | | | | | * tests/011/patmatch.tl, * tests/019/pct-fun.tl: Disable unused warnings around file self-compilation. * tests/011/tree-bind.tl: Fix one unused variable instance using interned symbol. * tests/011/compile.tl: Disable unused warnings around all file compilation. * tests/012/lambda.tl: Use the parameter of one trivial lambda. * tests/common.tl: Disable unused warnings around compiled tests.
* Allow t symbol in macro parameter lists.Kaz Kylheku2023-03-211-0/+20
| | | | | | | | | | | | | | | | | * eval.c (expand_params_rec, bind_macro_params): Handle t specially everywhere a parameter can occur. Expansion allows the syntax through without extending the environment with a t variable; binding walks over the structure without binding a variable. * stdlib/compiler.tl (expand-bind-mac-params): Likewise, handle occurrences of t, suppressing the generation of and assignment to variables, while ensuring that initializing expressions are evaluated. * tests/011/tree-bind.tl: New file. * txr.1: Documented.
* tests: add forgotten test for new expansion rule.Kaz Kylheku2022-05-211-0/+11
| | | | | | | | This was developed together with what became the May 12 commit 1162a735b61c1c5086fb6055471ee35cc8ed62a4; I just forgot to git add the file. * tests/011/macros-4.tl
* lambda-match: bug: over-strict match in variadic pattern.Kaz Kylheku2022-05-111-0/+14
| | | | | | | | | | | | * stdlib/match.tl (expand-lambda-match): A pattern that is shorter than the maximum number of arguments is augmented with a check ensuring that no fixed arguments are present beyond those that the pattern requires. However, this check must be omitted if the pattern is variadic, because those excess arguments match its tail pattern. * tests/011/patmatch.tl: Cases added.
* matcher: test case for `@{nil #/regex/}`.Kaz Kylheku2022-02-091-0/+2
| | | | * tests/011/patmatch.tl: New tests for recently fixed issue.
* matcher: bug: quasiliteral allowing prefix matches.Kaz Kylheku2022-02-041-1/+4
| | | | | | | | * stdlib/match.tl (expand-quasi-match): When matching `text` or `@var`, which are matching in the final position of the specimen, it is not good enough that match-str returns true; we must check that the entire string was matched. Reported by Paul A. Patience.
* New function: match-fboundp.Kaz Kylheku2022-01-171-1/+6
| | | | | | | | | | | | | | | | | | User vapnik spaknik was asking in the mailing list whether there is an existence test for TXR pattern functions. Now there is. * eval.c (eval_init): Register match-fboundp intrinsic. * match.c (match_fbound): New function. * match.h (match_fbound): Declared. * tests/011/txr-case.txr: New test cases. * txr.1: Documented. * stdlib/doc-syms.tl: Updated.
* keyparams: fix broken.Kaz Kylheku2022-01-171-0/+38
| | | | | | | | | | | | | | | | | | | Issues reported by user vapnik spaknik. The evaluation of init forms is incorrect. Init forms like '(x) evaluate to '(x) rather than (x), Also, init forms are evaluated even when the argument is present, so the entire current approach is wrong. * stdlib/keyparams.tl (extract-keys, extract-keys-p, build-key-list-expr): Functions removed. (stuff-key-params): New function. (:key): Rework using simplified approach, with just the stuff-key-params helper. All variables from the keyword parameter list are bound with let. Generated code searches the keyword parameters for values and assigns the variables as needed, evaluating default init forms in the not-found cases. * tests/011/keyparams.tl: New file.
* match: allow bound variables with regex modifier.Kaz Kylheku2021-12-271-0/+6
| | | | | | | | | * stdlib/match.tl (expand-quasi-match): Add regex cases with bound variable. * tests/011/patmatch.tl: Test cases for this. * txr.1: Documented.
* each-match macro family: missing anon block.Kaz Kylheku2021-12-081-0/+3
| | | | | | | | | | | | | | | | | * txr.1: Adding the missing requirement that each-match and the other macros in that family must have an implicit anonymous block around the body forms. This is a requirements bug, effectively: the programmer expects these operators to be consistent with the each operator, as part of the same family. * match.tl (each-match-expander): Implement the requirement. Since we are using mapping functions, we must use temporary variables: the evaluation of the expressions which produce the sequence argument values to the mapping functions must be outside of the anonymous block. The block must surround only the function call. * tests/011/patmatch.tl: Add small test case covering this.
* match: unquoted quasiliteral patterns don't work.Kaz Kylheku2021-10-261-0/+5
| | | | | | * tests/011/patmatch.tl: Add failing test cases. * txr.1: Document desired requirements.
* matcher: rename error-throwing macros.Kaz Kylheku2021-08-191-5/+5
| | | | | | | | | | | | | | | * stdlib/match.tl (must-match): Renamed to just match. It's just when-match without the "when". (must-match-case): Renamed to match-ecase, consistent with the case -> ecase naming scheme. * lisplib.c (match_set_entries): Names updated here. * tests/011/patmatch.tl: Test cases updated. * txr.1: Names updated here. * stdlib/doc-syms.tl: Updated.
* matcher: new must-match and must-match-case macros.Kaz Kylheku2021-08-131-0/+9
| | | | | | | | | | | | | * lisplib.c (match_set_entries): Intern the match-error symbol. Register autoloads for must-match and must-match-case. * stdlib/match.tl (match-error): Register exception symbol, as subtype of match-error. (must-match, must-match-case): New macros. * tests/011/patmatch.tl: Test cases. * txr.1: Documented.
* genman, lib, tests: use defvarl where possible.Paul A. Patience2021-07-052-13/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | * genman.txr (dupes, tagnum): Replace defvar with defvarl. * stdlib/doc-lookup.tl (os-symbol): Same. * tests/011/macros-3.tl (x): Same. * tests/011/mandel.txr (x-centre, y-centre, width, i-max, j-max, n) (r-max, pixel-size, x-offset, y-offset): Same. (file, colour-max): Delete (unused) variables. * tests/012/circ.tl (x): Replace defvar with defvarl. * tests/012/stack.tl (stack-limited): Same. * tests/012/struct.tl (s): Same. * tests/013/maze.tl (vi, pa, sc): Delete variables. Use function arguments instead. (usage): Fix typo. * tests/014/dgram-stream.tl (family): Rename to... (*family*): ...this. * tests/014/socket-basic.tl (socktype): Rename to... (*socktype*): ...this. (%iters%): Replace defvar with defvarl.
* matcher: new looping macros.Kaz Kylheku2021-06-241-0/+25
| | | | | | | | | | | | | | * lisplib.c (match_set_entries): Autoload on new while-match, while-match-case and while-true-match-case symbols. * share/txr/stdlib/match.tl (while-match, while-match-case, while-true-match-case): New macros. * tests/011/patmatch.tl: Tests. * txr.1: Documented. * share/txr/stdlib/doc-syms.tl: Updated.
* txr-case: upkeep.Kaz Kylheku2021-06-162-0/+13
| | | | | | | | | | | | | | | | | | | * share/txr/stdlib/txr-case.tl (txr-case-impl): If the input is a stream, then convert it to a lazy list of lines, so that running multiple functions against it produces sane, backtracking behavior, like a @(cases) construct. * tests/011/txr-case.expected: Updated. * tests/011/txr-case.txr: Now actually contains a test case for txr-case. * txr.1: Address an issue reported by Paul A. Patience: the input to match-fun, txr-if and txr-when may be a stream. That has always been the case in the implementation. Also document that when the input is a single string, it is treated as a list. Document the new requirement in txr-case that a stream is converted into lazy list of lines.
* defsymacro: regression: don't expand replacement.Kaz Kylheku2021-06-151-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | This is a regression that was introduced in 191. The change in 191 was trying to prevent defsymacro from being expanded immediately by the expander except in 190 compatibility. Unfortunately, this caused the whole defsymacro block not to be entered unless in 190 compatibility, otherwise taking the common exit which returns form_ex, containing the expanded replacement form. * eval.c (do_expand): Split up implementation of defvarl and defsymacro. In the defsymacro block, do not do any expanding on entry. Absent of compatibility mode, we just do some sanity checks and pass the entire form through. In 262 compatibility, we do the expansion to obtain form_ex. Then all the previous compat logic is wrapped in that block. * tests/011/macros-3.tl: Add a test case which confirms that symbol macros are lazily expanded. Weakness in the test suite is how these regressions creep in. * txr.1: Improve defsymacro documentation, spelling out clearly that the unexpanded replacement form is associated with the symbol. Eliminate obsolescent text suggesting that defsymacro is evaluated at macro time.
* tests: remove *stderr* to *stdnull* redirection.Kaz Kylheku2021-06-111-8/+6
| | | | | | | | | | | | | | The recent commit 225ff2fa2fdb9e5169db5e2c06dc3b0053b775bb titled "errors: avoid premature release of deferred warnings." obviates the need for dealing with noise when detecting errors from test cases. * patmatch.tl: Remove macro-time-let around several test cases. * tests/012/ifa.tl: Likewise. * tests/common.tl (macro-time-let): Macro removed.
* matcher: doc fix, quasiquote examples, new test.Kaz Kylheku2021-06-041-0/+1
| | | | | | | * tests/011/patmatch.tl: New test case. * txr.1: Heading fix: Quasiquote matching notation, not quasiliteral. Examples of quasiquote notation added.
* json: pattern matching test cases and bugfix.Kaz Kylheku2021-06-031-0/+17
| | | | | | | | | | | | | * parser.y (json_val): We must nreverse the json_pairs which were pushed in right to left order. This didn't matter for constructing hashes so it was left out, but under quasiquoting the order matters: it determines the order of evaluation and of pattern matching. * tests/011/patmatch.tl: New quasiquoting pattern matching cases, including JSON. * y.tab.c.shipped: Regenerated.
* matcher: allow hash pattern to omit values.Kaz Kylheku2021-05-241-0/+7
| | | | | | | | | | | | The @(hash ...) operator now allows key-only patterns like (42) or (@x), where x could be bound or unbound. This has separate semantics from when a value is present. * share/txr/stdlib/match.tl (compile-hash-match): Implement. * tests/011/patmatch.tl: Test. * txr.1: Document.
* matcher: new "each-match family" of macros.Kaz Kylheku2021-05-041-0/+53
| | | | | | | | | | | | | | | | | | * lisplib.c (match_set_entries): New autoload symbols: each-match, append-matches, keep-matches, each-match-product, append-match-products, keep-match-products. * share/txr/stdlib/doc-syms.tl: Updated. * share/txr/stdlib/match.tl (each-match-expander): New function. (each-match, append-matches, keep-matches, each-match-product, append-match-products, keep-match-products): New macros. * tests/011/patmatch.tl: New tests covering each macro, far from exhaustively. * txr.1: Documented.
* matcher: make use of mtest in test suite.Kaz Kylheku2021-04-271-111/+122
| | | | | * tests/011/patmatch.tl: Use mtest throughout to condense the syntax.
* matcher: add some test variants.Kaz Kylheku2021-04-261-2/+20
| | | | | | | * tests/011/patmatch.tl: Add variants based on existing tests which insert an extra character at the left that is matched by a bound variable. This tests that the remainder of the pattern is following the offset numeric position within the string.
* matcher: quasi match incorrectly treats nil as bound.Kaz Kylheku2021-04-261-1/+5
| | | | | | | | | | | | * share/txr/stdlib/match.tl (expand-quasi-match): bound-p local function must return nil if the symbol is nil. * share/txr/stdlib/match.tl: New test cases testing that @nil is treated as an unbound variable in the non-consecutive-variables test. Also, making duplicates of certain tests that start with a text match and sticking @nil as the first element into them, so that the text match is forced to be the second item.
* matcher: bugfix in `text{rest}` case.Kaz Kylheku2021-04-261-0/+3
| | | | | | * share/txr/stdlib/match.tl (expand-quasi-match): Calculate npos correctly relative to current pos. Use match-str rather than starts-with.
* matcher: more quasi tests: coverage of all cases.Kaz Kylheku2021-04-251-1/+8
| | | | | | * tests/011/patmatch.tl: More tests. All explicitly coded cases covered, except the fall-through situations we are not yet catching in expand-quasi-match.
* match: third round of quasi tests and fixes.Kaz Kylheku2021-04-251-0/+14
| | | | | | | * share/txr/stdlib/match.tl (expand-quasi-match): Add case fo r unbound var followed by var, followed by nothing. * tests/011/patmatch.tl: New tests.
* matcher: second round of quasi tests and fixes.Kaz Kylheku2021-04-251-0/+6
| | | | | | | * share/txr/stdlib/match.tl (expan-quasi-match): Use rest variable consistently instead of (cdr args). Two instances of (cdr rest) should just be rest. New case added for variable with no modifiers followed by text being the last item.
* matcher: first round of quasi tests and bugfix.Kaz Kylheku2021-04-251-0/+10
| | | | | | | | | | * share/txr/stdlib/match.tl (expand-quasi-match): The return value of search-str isn't a length but an absolute position. We not only fix a bug, but lose a useless calculation. * tests/011/patmatch.tl: New test cases for quasiliteral patterns, starting with the most rudimentary. Last one broke, due to the above issue.
* matcher: compile the test cases.Kaz Kylheku2021-04-221-6/+13
| | | | | | | | * tests/011/patmatch.tl: Wrap one test with compile-only and eval-only so that the compiler ignores it. Add a form at the end of the file, similarly ignored by the compiler to compile the file. This compiles and executes all the test cases.
* matcher: defmatch: useful :env parameter.Kaz Kylheku2021-04-211-0/+15
| | | | | | | | | | | | | | | | | | | * share/txr/stdlib/match.tl (compile-match): Pattern macro expanders now have an environment parameter. We turn the list of variables that have been bound so far into a fake macro-time lexical environment, the parent of which is the surrounding environment. The pattern macro can query this using the lexical-var-p function to determine whether a given variable already has a binding, either in the pattern, or in the surrounding lexical environment. (defmatch): Generate a two-argument lambda, and use the new mac-env-param-bind to make the environment object available to the user-defined expansion. * tests/011/patmatch.tl: New test cases for this environment mechanism, and also for defmatch itself. * txr.1: Document role of :env under defmatch.
* matcher: new pattern operator @(end)Kaz Kylheku2021-04-201-0/+7
| | | | | | | | | | | | | | | * share/txr/stdlib/doc-syms.tl: New entry for end. * share/txr/stdlib/match.tl (check, check-end, check-sym, loosen, pat-len): New functions, taken from original local functions of sme macro. (sme): Refactored by hoisting local functions out. Some local variable renaming. (end): New pattern macro. * tests/011/patmatch.tl: New test for end. * txr.1: Documented.
* matcher: first pattern macro, sme.Kaz Kylheku2021-04-191-0/+37
| | | | | | | | | | | | * lisplib.c (match_instantiate): Intern sme symbol. * share/txr/stdlib/doc-syms.tl: Update with sme entry. * share/txr/stdlib/match.tl (sme): New defmatch macro. * tests/011/patmatch.tl: New tests for sme. * txr.1: Documented.
* tests: implicitly generate empty .expected files.Kaz Kylheku2021-04-122-0/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Makefile (%.expected): New implicit rule. Whenever a test requires a .expected file, if it is missing, we create an empty one. This file will be treated as an intermediate by GNU Make, which means that it will be deleted when make terminates. * tests/012/compile.tl: Some of the .tl files no longer have an .expected file, so we have to test for that in the catenating logic. * tests/008/call-2.expected, * tests/008/no-stdin-hang.expected, * tests/011/macros-3.expected, * tests/011/patmatch.expected, * tests/012/aseq.expected, * tests/012/ashwin.expected, * tests/012/compile.tl, * tests/012/cont.expected, * tests/012/defset.expected, * tests/012/ifa.expected, * tests/012/oop-seq.expected, * tests/012/parse.expected, * tests/012/quasi.expected, * tests/012/quine.expected, * tests/012/seq.expected, * tests/012/struct.expected, * tests/012/stslot.expected, * tests/014/dgram-stream.expected, * tests/014/in6addr-str.expected, * tests/014/inaddr-str.expected, * tests/014/socket-basic.expected, * tests/015/awk-fconv.expected, * tests/015/split.expected, * tests/015/trim.expected, * tests/016/arith.expected, * tests/016/ud-arith.expected, * tests/017/ffi-misc.expected, * tests/018/chmod.expected: Empty file deleted.
* matcher: add @(or) test involving existing variables.Kaz Kylheku2021-02-081-0/+5
| | | | | | | * tests/011/patmatch.tl: New test case showing that existing variables that don't match in an @(or) retain their values; they do not become nil, unlike freshly bound variables in non-matching or-clauses.
* matcher: @(and) back-referencing test.Kaz Kylheku2021-02-081-0/+3
| | | | | | * tests/011/patmatch.tl: back-referencing between the expressions in an @(and) patter has recently been introduced, and needs some coverage.
* matcher: fix backreferencing in predicate.Kaz Kylheku2021-02-081-0/+6
| | | | | | | | | * share/txr/stdlib/match.tl (compile-predicate-match): Always allocate res-var as a gensym; do not use resvar. Otherwise we will freshly bind resvar as a local, failing to back-reference. * tests/011/patmatch.tl: Add test cases, the second of which fails before this change.
* matcher: test for dotted variable in predicate.Kaz Kylheku2021-02-081-0/+4
| | | | * tests/011/patmatch.tl: New test case.
* matcher: remove @(op ...) pattern.Kaz Kylheku2021-02-061-2/+2
| | | | | | | | | | | | | | | All he typical uses of this are better served by the new predicate match. If op is really needed, it can be used with the DWIM form of the predicate, as in @[(op ...) ...]. * share/txr/stdlib/match.tl (compile-op-match): Function removed. (compile-match): Remove op case. * tests/011/patmatch.tl: Keep op test cases by converting them to predicate test cases. * txr.1: Documentation removed.
* matcher: redesign predicate pattern.Kaz Kylheku2021-02-061-13/+10
| | | | | | | | | | | | | | | | | | | | | | | | * share/txr/stdlib/match.tl (compile-dwim-predicate-match): Function removed. There is no more special @(dwim ...) or @[...] pattern. (compile-predicate-match): Function rewritten, providing different syntax and semantics. (compile-match): dwim dispatch removed. (non-triv-pat-p): Replaced @(op ...) calls with new-style predicate syntax. (var-pat-p): Likewise, and upgraded one instance of old-style predicate syntax to new. * share/txr/stdlib/compiler.tl (reduce-or): Adjust predicate pattern to new style. * share/txr/stdlib/optimize.tl (dedup-labels): Likewise. * tests/011/patmatch.tl: All test cases with predicate syntax are updated to new style. One test case removed; some added. * txr.1: Predicate patterns re-documented. All examples involving predicate patterns updated.
* matcher: back-reference Lisp variables.Kaz Kylheku2021-02-051-0/+21
| | | | | | | | | | | | | | | | * share/txr/stdlib/match.tl (struct var-list): New slot, menv. (var-list exists): Method now falls back on lexical scope and dynamic variables. (get-var-list): New function. (when-match, if-match, match-case, when-exprs-match): Capture macro environment and use get-vars-list to convert to a vars object which carries it as the menv slot. With this, the compiler framework has access to the lexical environment. * tests/011/patmatch.tl: Test cases of back-referencing with Lisp lexicals. * txr.1: Documented.
* matcher: rearrange match order of @(with).Kaz Kylheku2021-02-051-2/+7
| | | | | | | | | | | | | | | | | The @(with side-pat expr main-pat) syntax becomes @(with main-pat side-pat expr), which is more useful. Also, the main-pat can be omitted. * share/txr/stdlib/match.tl (compile-with-match): Recognize two forms of the syntax: two argument form with main-pat omitted and the full form. In the full form, main-pat is on the left now and processed first, so we have to rearrange the compilation and integration order. * tests/011/patmatch.tl: Existing tests updated. Two-argument test added. * txr.1: Updated.
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