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* matcher: new failing backreferencing test case.Kaz Kylheku2021-02-021-0/+4
| | | | | | | | | | * tests/011/patmatch.tl: New test cases that break. The (copy var-list) logic in the handling of and and or is incomplete. The bifurcated vars must be merged together into the original vars. Without this, it looks as if the operator didn't bind any variables, and they can be repeated again without backreferencing. In the broken examples, variable a is taking on the value 2 instead of mismatching the previous value of 1.
* matcher: new @(with) operator.Kaz Kylheku2021-02-014-1/+74
| | | | | | | | | | | | * lisplib.c (match_instantiate): Ensure usr:with is interned. * share/txr/stdlib/match.tl (compile-with-match): New function. (compile-match): Wire in with operator. * tests/011/patmatch.tl: Test cases. * txr.1: Documented.
* matcher: rename @(let) to @(as).Kaz Kylheku2021-02-014-17/+17
| | | | | | | | | | | | | * lisplib.c (match_instantiate): Ensure usr:as is interned. * share/txr/stdlib/match.tl (compile-let-match): Rename to compile-as-match. (compile-match): Remove handling of let symbol; route as symbol to compile-as-match. * tests/011/patmatch.tl: Update all uses of let to as. * txr.1: Updated.
* matcher: restore nulling out of vars in @(or).Kaz Kylheku2021-02-011-12/+23
| | | | | | | | | | | | | * share/txr/stdlib/match.tl (compiled-match get-vars): Local function here becomes stand-alone defun, because we need it elsewhere. (compiled-mach wrap-guards): When processing the guard-disjunction object to produce the or branches, we calculate, for each branch, its own variables, and the variables of the preceding clauses. We generate code to set the previous variables to nil. Not all the previous variables, just those that are not also in the current clause. (get-vars): New function.
* matcher: adding test case for @(or) regression.Kaz Kylheku2021-02-011-0/+3
| | | | | | | * tests/011/patmatch.tl: New test case showing that @(or) no longer nulls out the variables from previous clauses like it used to. (2 2 nil) is returned, showing a is not set to nil when b matches.
* matcher: struct: move type test before slot tests.Kaz Kylheku2021-02-011-4/+2
| | | | | | | | | | | | | | | In the loose form of the @(struct ...) match, the struct type is matched by a pattern. This pattern should execute before the object is tested for the presence of the required slots by by guard1. It should not come between testing for the presence of slots, and then testing their contents. * share/txr/stdlib/match.tl (compile-struct-match): Do not lump together the type-match and slot-matches into a single all-matches list. Emit type-match's guard before guard1, and the slot-matches guards after. The order is basic test (guard0), struct type pattern match (type-match), slots-present (guard1) and then slot contents (slot-matches).
* matcher: struct: make guards lists; eliminate backquote.Kaz Kylheku2021-02-011-13/+15
| | | | | | * share/txr/stdlib/match.tl (compile-struct-match): make guard0 and guard1 lists match-guard items. Replace backquote with straight append.
* doc: mistake in example for @[...] pattern.Kaz Kylheku2021-02-011-3/+3
| | | | | | | * txr.1: Fix use of nonexistent odd function which should be oddp. The same example occurs in the test suite, but without this error. Also fix indentation in this and the two related examples above.
* matcher: bugfix: bad stray code in @[...] matcher.Kaz Kylheku2021-02-012-2/+5
| | | | | | | | | | * share/txr/stdlib/match.tl (compile-dwim-predicate-match): In he one-argument case, there is stray code referencing var-match.test-expr, which blows up. This is hit by exactly the one example in the documentation that was not added as a test case. * tests/011/patmatch.tl: Add test case from doc.
* doc: mistake in when-match rcons example.Kaz Kylheku2021-02-011-1/+1
| | | | | * txr.1: The de-sugared (rcons @a @b) example is missing a quote on the object, and so returns nil and not (1 2).
* Version 250txr-250Kaz Kylheku2021-01-316-249/+295
| | | | | | | | | | * RELNOTES: Updated. * configure, txr.1: Bumped version and date. * share/txr/stdlib/ver.tl: Likewise. * txr.vim, tl.vim: Regenerated.
* lib: get rid of alist_remove1 function.Kaz Kylheku2021-01-311-6/+1
| | | | | | | * lib.c (delete_package): This is the only user of alist_remove1. It can use remqual with a car_f key, which is more efficient. (alist_remove1): Function removed.
* @(rebind): bugfix: don't clobber right side variable.Kaz Kylheku2021-01-305-11/+79
| | | | | | | | | | | | | | | | | | | | | * Makefile (tst/tests/000/binding.ok): Pass -B to txr for this new test. * match.c (v_rebind): Fix gaping copy-and-paste bug here, which causes rebind to take on the behavior of local/forget; it takes all symbols that appear as its arguments from the environment and produces an environment in which they don't exist. What we want is to remove the left variables from the environment, and since that is a nested pattern, the right way to do that is to flatten it. Bug reported by Frank Schwidom. * tests/000/binding.txr: New file. * tests/000/binding.expected: New file. * txr.1: Improve documentation of @(rebind), also making improvements in @(set) documentation.
* doc: bad syntax formatting: partition and split.Kaz Kylheku2021-01-291-4/+4
| | | | | | * txr.1: Fix issues in the formatting of the index-list, index and function arguments of partition, partition*, split and split* functions.
* matcher: prune @nil in cons and vector matches.Kaz Kylheku2021-01-291-9/+19
| | | | | | | | | | | | | | | | | | Elimination of unused temporaries is really the job of the compiler, but we can do some simple things to get better code from the matcher in the meanwhile. In list and vector matches, @nil gets used just for placeholding. We can avoid generating the code which binds the corresponding value to an unused gensym. share/txr/stdlib/match.tl (compile-var-match): When the variable is nil, then do not generate a match-guard with empty content. Just generate an empty guard-chain. The higher level compiler can then check for this empty guard chain and prune its own material away. (compile-vec-match, compile-cons-structure): Eliminate every gensym and its initializing expression, whose corresponding compiled sub-match has an empty guard chain.
* matcher: bugfix: @nil isn't trivial.Kaz Kylheku2021-01-292-1/+2
| | | | | | | | | | | | | * share/txr/stdlib/match.tl (non-triv-pat-p): Extend sys:var match so (sys:var nil) is identified as trivial. * tests/011/patmatch.tl: Add broken test case fixed by this. This doesn't show up when @nil is used as the only match. It also doesn't show up if @nil is used in a vector or list in a mixture with other operators, because those other ones identify the overall list pattern as non-trivial. None of the occurrences of @nil in the existing test suite, like (@nil @nil @x) tickle the bug.
* optimizer: add a few peephole reductions.Kaz Kylheku2021-01-292-2/+14
| | | | | | | | | | | * share/txr/stdlib/compiler.tl (compiler optimize): Call peephole method on basic-blocks object, rather than thread-jumps. * share/txr/stdlib/optimize.tl (basic-blocks thread-jumps): Rename method to peephole, since it does more than just thread-jumps. Add some dead code elimination, and elimination of wasteful moves.
* matcher: remove duplicate variables in one place.Kaz Kylheku2021-01-281-21/+11
| | | | | | | | | | | | | | | * share/txr/stdlib/match.tl (compiled-match get-var-exprs): method get-var-exprs removed. This is only used in one place, which is going away. Actually, the value is not even used; it is discarded. (compiled-match get-vars): This method now passes the list of variables thorugh uniq. The logic of get-guard-values is pulled into a local function, since get-guard-values has only one caller now. (get-guard-values): Function removed. (compile-or-match): Removing all-var-exprs variable and all that calculation of the unique names, as well as the extra match-guard which duplicates those names pointlessly.
* matcher: rid compiled-match of test-expr and vars.Kaz Kylheku2021-01-281-89/+43
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * share/txr/stdlib/match.tl (match-vars): Get rid of base, since only match-guard would need it now. (match-guard): Move match-vars methods and slots into this structure. (compiled-match): No longer inherits match-vars, so no longer has vars and var-exprs slots. Also, slot test-expr removed. (compiled-match :postinit): Removed. (compiled-match {get-vars, get-var-exprs}): Do not prepend vars and var-exprs which no longer exist. (compile-struct-match, compile-vec-match, compile-range-match, compile-cons-structure, compile-let-match, compile-hash-match): Get rid of vars, var-exprs and test-expr. These are just causing duplicate variables to exist. (compile-var-match): Convert necessary test-expr and vars into match-guard object put into guard-chain. (compile-atom-match, compile-or-match): Get rid of test-expr. (compile-op-match, compile-predicate-match): Get rid of stray reference to test-expr. (compile-dwim-predicate-match): Move obj-var test into guard. Get rid of vars, var-exprs and test-expr. (compile-loop-match): Move vars and and test expression into a second guard object, so there are now guard0 and guard1. (compile-and-match): Get rid of all-var-exprs local variable and its compuation, vars, var-exprs and test-expr. (compile-not-match): Get rid of test-expr and empty vars. (compile-hash-match):
* matcher: add test-expr to match-guard.Kaz Kylheku2021-01-281-10/+10
| | | | | | | | | | | | | | * share/txr/stdlib/match.tl (match-guard): New slot, test-expr. This provides a bottom test, with all the variables bound, allowing us to allocate just one match guard in a few instances where we are allocating two. This will be important in the upcoming refactoring. (compiled-match :postinit): Allocate just one match-guard with test-expr instead of a separate one with a guard-expr. (wrap-guards): Wrap the test-expr to the code, if it is not t. (compile-hash-match): Reduce two match guards to one in two instances.
* matcher: restructuring to fix new broken case.Kaz Kylheku2021-01-282-96/+175
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This one test case requires restructuring. The handling for the @(or ...) operator is now very different. To support @(or ...), there is now a new variant of the match-guard object called guard disjunction, which contains multiple match-guard chains. Furthermore, the separation between both guard-chain lists and compiled-match having a test expression and variables is being obliterated. For now, what we do is in a :postinit handler on compiled-match, we immediately convert the test-expr, vars and var-exprs slots into a match-guard object, which is placed into the guard-chain, and then we clear these slots. They are now vestigial only and will be removed. * tests/011/patmatch.tl: New test case which shows that (@(or foo bar) ...) does not short immediately short circuit to a failure when the corresponding element is neither foo nor bar. Matching proceeds to the right, wasting cycles and possibly causing errors. * share/txr/stdlib/match.tl (*match-var*): Move to top, above structs. There are some methods which refer to this variable now for throwing internal errors. (guard-disjunction): New object that is compatible with a match-guard, and placed into guard-lists as if it were a match-guard. This handles the bifurcation logic of an OR match. (compiled-match): New :postinit handler converts local vars, var-exprs and test-expr into a match-guard placed into the chain, and then clears these values. The compilation of code is done purely from the guard-chain. (compiled-match get-vars): This method is now complicated due to the guard-disjunction objects, and so uses a helper function called get-guard-values. (compiled-match get-var-exprs): New method accompanying get-vars to get the accompanying init expressions. (compiled-match wrap-guards): Two changes are going on here. One is that the funccion takes on more of the responsibility which was previously carried out by the callers. The callers were interpolating the test-expr and vars from a compiled-match into a piece of code, which was then passed to wrap-guards. Hence the naming: the job was just to wrap some guards. Now, wrap-guards is called just with the body forms, and does all of the work. Secondly, wrap-guards is complicated due to the handling of the guard-disjunction items. Also, there is some case handling to generate better code; we avoid generating an empty (let () ...) and (alet () ...). (compiled-match add-guard-pre, compiled-match add-guards-pre, compiled-match add-guards-post): New methods for adding guards after construction. These interfaces replace hacks of pushing new variables, tweaking the test-expr, or explicitly pushing guards onto the list. (get-guard-values): New function for iterating over a guard-chain, including match-guard and guard-disjunction items, retrieving a particular list-valued slot from each one using the fun argument, and returning a list of all those lists catenated together. (compile-struct-match, compile-vec-match, compile-range-match): Eliminate test-expr, replacing it with the harmless t. (compile-op-match): We don't try to extend the test-expr of the compiled var. Rather we add our guard expressin using the add-guard-pre interface. (compile-dwim-predicate-match): Likewise, and also, we do not calculate the test-expr for the output compiled-match from the constituent match test-exprs. We ignore those and just set the test-expr pat-match.obj-var. The constituent test-exprs have been converted to guard-chain items already, so there is no point in referring to them. (compile-predicate-match): Use add-guard-pre method to add guard instead of pushing it on list. (compile-cons-structure): Eliminate test-expr being calculated from constituent test-exprs, and just stub it out to t. (compile-require-match): Use add-guards-post to push match-guard onto compiled child mach, instead of tweaking its test-expr. (compile-let-match): Oblierate calculation of test-expr from child test-exprs, replacing with t stub. (compile-loop-match): Call wrap-guards in the new way, without generating assignments or test-expr. (compile-parallel-match): This method is removed; there are now separate compile-or-match and compile-and-match methods. (compile-or-match): New method: compiles consitituent expressions, and converts them into multiple guard-chains for a guard-disjunction object. Then wrap-guards will finish the job of emitting the or logic out of those chains. (compile-and-match): This shares some common logic with compile-or-match, but is substantially simpler. Pattern matching is implicitly AND-based: in a pattern, all the sub-patterns have to match. So there isn't much to do beyond just evaluating all the patterns against the same object. They can all be thrown into one combined flat guard chain. (compile-not-match): Adjust to new wrap-guards interface. Nothing left to do here but pass the expression t to it. (copmile-hash-mach): The post-constructon manipulations of the child compiled matches are done with the appropriate add-guards-pre. The test-expr is eliminated, replaced with t. (compile-match): Wire or and and to the new separate methods compile-or-match and compile-and-match. (when-match, if-match, match-case): Simplified due to when-match interface change. The macros depend on a lot less implementation detail now: they bind the required vars and generate the code.
* compiler: bug: append-each mutates lists.Kaz Kylheku2021-01-281-5/+7
| | | | | | | | | | | | | | | | | | * share/txr/stdlib/compiler.tl (expand-each): The algorithm for appending is completely wrong. Not only does it destructively mutate, it doesn't look like it will behave like the interpreted append-each operator, since it assumes it can rplacd the tail cons of the output list, which won't work for non-list sequence types. * share/txr/stdlib/compiler.tl (expand-each): New translation strategy: append-each each will now accumulate the values of the body expression into a list, exactly like collect-each does. Then it will apply the sys:append function to that list. This ensures the "as if" semantics (append-each behaves like the append function), and non-destructive behavior: everything is copied that needs to be, except that a list tail can share substructure.
* matcher: remove superflous test-expr in hash op.Kaz Kylheku2021-01-271-2/+0
| | | | | | | * share/txr/stdlib/match.tl (compile-hash-match): In the trivial key case, we are wastefully installing the same expression as both a guard in the guard-chain and as a test-expr. We should not be frobbing vm.test-expr.
* matcher: fix broken predicate test.Kaz Kylheku2021-01-271-1/+2
| | | | | * share/txr/stdlib/match.tl (compile-predicate-match): Promote condition from test-expr into guard-chain.
* mather: new bad (@(predicate) @(all ...)) test case.Kaz Kylheku2021-01-271-0/+2
| | | | | * tests/011/patmatch.tl: Predicates must also be tested earlier, as guard conditions.
* matcher: smallest fix for broken test case found.Kaz Kylheku2021-01-271-1/+3
| | | | | | * share/txr/stdlib/match.tl (compile-atom-match): Do not express the match for the atom via test-expr. That is too late. It needs to be a guard in the guard chain.
* matcher: new broken test case: bad order of checks.Kaz Kylheku2021-01-271-0/+2
| | | | | | | * tests/011/patmatch.tl: Even though bar mismatches foo, the second element @(all) is processed and tries to collect the list. This results in an error due to the list being improper.
* matcher: clean up unclear vars situaton.Kaz Kylheku2021-01-271-38/+38
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With this commit, the new broken test case passes. The main issue is not clearly separating temporary variables in mach-guards from public variables. * share/txr/stdlib/match.tl (match-vars): Remove pure-vars and pure-var-exprs from this inheritance base, as well as the related lets method. (match-guard): Add the "pure" slots here, under new names: pure-temps and pure-temp-exprs. This renaming is for clarity. Add the lets method here, based on these new variables. Add new slots temps, representing the impure temps. There is no temp-exprs because impure temps are bound to nil and later assigned. (compiled-match get-temps): Method removed. (compiled-match get-vars): Rewritten to avoid using get-temps which doesn't exist any more. This method has a clear purpose: to all the public variables coming from the patterns themselves, whether those variables are promoted into a guard-chain for early binding or whether they are attached on the compiled-match object. (compiled-match wrap-guards): Ensure that the new temps from the guard-chain objects are bound with let. (compile-struct-match, compile-vec-match, compile-range-match, compile-dwim-predicate-match, compile-cons-structure, compile-hash-match): pure-vars rename. (compile-loop-match): We no longer bind cm.(get-temps) here. That method doesn't exist. If we are not doing @(some), we bind cm-vars: the public vars collected from cm. We need local copies of them to catch their values and accumulate them into list. In the match-guard constructor, we move the collect-gens into temps; they are not public variables. (compile-parallel-match): Drop ^(let ,pm.(get-temps) ...) from the expansion.
* matcher: add failing @(or @(and ...)) test.Kaz Kylheku2021-01-271-0/+2
| | | | | | * tests/011/patmatch.tl: It looks like there is still a problem with scoping. An inner x is assigned the correct value, leaving the outer x nil.
* matcher: vars issue with loop and parallel paterns.Kaz Kylheku2021-01-271-5/+6
| | | | | | | | | | * share/txr/stdlib/match.tl (compile-loop-match): We must use the get-vars method of a compiled-match to get a list of its vars, and not directly access the vars slot. The list of vars must include all the non-temporary variables from the guard-chain. This is important in these rules because they specially treat the guard-chain and do not integrate it into their own guard chain directly.
* matcher: add failing @(all (@or ...)) test.Kaz Kylheku2021-01-271-0/+3
| | | | | The matcher has a bug: the loop patterns are not collecting the variables from enclosed parallel patterns.
* compiler: eliminate one local in compiler source.Kaz Kylheku2021-01-271-2/+1
| | | | | | * share/txr/stdlib/compiler.tl (compiler comp-let): The eenv variable is used only in one place; the immediately next binding for fenv. Let's eliminate it.
* optimizer: syntactic sugar around rewrite.Kaz Kylheku2021-01-271-46/+44
| | | | | | | | * share/txr/stdlib/optimize.tl (rewrite-case): New macro, combining rewrite, lambda and match-case. (basic-blocks thread-jumps): Condense using rewrite-case, and unfold some of the expressions into longer lines, since everything has moved quite a bit to the left.
* optimizer: format to 80 cols.Kaz Kylheku2021-01-271-7/+20
| | | | | * share/txr/stdlib/optimize.tl (basic-blocks thread-jumps): Wrap long pattern expressions.
* compiler: get rid of vector from swtch syntax.Kaz Kylheku2021-01-261-1/+1
| | | | | | | * share/txr/stdlib/compiler.tl (comp-switch): Convert the list of labels for the switch instruction from vector to list. This ends up a vector due to contagion from the sys:switch special operator syntax.
* compiler: use consistent prefix for label gensyms.Kaz Kylheku2021-01-261-1/+1
| | | | | | * share/txr/stdlib/compiler.tl (compiler comp-lambda-impl): Use the same "l" prefix for the skip label that is used elsewhere in the compiler.
* optimizer: thread close instructions.Kaz Kylheku2021-01-261-0/+6
| | | | | | | | * share/txr/stdlib/optimize.tl (basic-blocks thread-jumps): Also thread the implicit branch performed by close instructions. If a close instruction branches to an unconditional jump, then rewrite the close to jump that jump's target.
* optimizer: thread ifq instructions also.Kaz Kylheku2021-01-261-0/+9
| | | | | | | | | * share/txr/stdlib/optimize.tl (basic-blocks thread-jumps): If an (ifq RX RY label-X) instruction branches to an (ifq RX RY label-Y) instruction, replace it with that instruction. Moreover, if (if RX RY label-X) jumps to a (jmp label-Y) instruction, also replace it with (if RX RY label-Y).
* compiler: jump-threading optimization.Kaz Kylheku2021-01-262-1/+97
| | | | | | | | * share/txr/stdlib/compiler.tl: Load the new optimize module. (compiler optimize): New method. (compile-toplevel): Pass code through optimize method. * share/txr/stdlib/optimize.tl: New file.
* matcher: allow pat/var argument: @[expr var pat]Kaz Kylheku2021-01-263-13/+60
| | | | | | | | | | | | * share/txr/stdlib/match.tl (compile-dwim-predicate-match): Drop redundant bindable check of sym, since compile-var-match checks this. Support third argument which gives a pattern or variable which captures the value from the predicate function, which might be interesting (not just true/false). * tests/011/patmatch.tl: New tests. * txr.1: Documented.
* matcher: allow @[...] predicate notation.Kaz Kylheku2021-01-252-13/+34
| | | | | | | | | * share/txr/stdlib/match.tl (compile-dwim-predicate-match): New function. (compile-match): Route dwim symbol to compile-dwim-predicate-match. * txr.1: Documented.
* doc: update definition of non-trivial pattern.Kaz Kylheku2021-01-251-1/+1
| | | | | * txr.1: Under Pattern operator hash, include range patterns wih non-trivial contents as being non-trivial.
* doc: fix .meti not wrapped in of .mono/.onom.Kaz Kylheku2021-01-252-0/+42
| | | | | | | | | | * checkman.txr (check-meti): New pattern function which simply diagnoses any .meti. This relies on the fact that .mono/.onom blocks are matched and consumed by by another rule. All valid .meti lines are consumed as part of these blocks, so any .meti that remain must be outside. * txr.1: Fix numerous occurrences of this.
* doc: really remove @(rcons) pattern operatorKaz Kylheku2021-01-251-49/+1
| | | | | | * txr.1: Fix typo under Range match. Remove the documentation for the nonexistent pattern operator @(rcons ...) that was supposed to be removed before release 249.
* lazy-sub-str: bugfix: invalid substructure sharing.Kaz Kylheku2021-01-253-1/+48
| | | | | | | | | | | | | | | | | | | | | | | | | | | This addresses a bug manifesting itself as a regression in the behavior of @(freeform), which was reported by Frank Schwidom. The sub_str operation calls lazy_subs_str for a lazy string. But lazy_sub_str again relies on sub_str for extracting part of the lazy string prefix. But sub_str can potentially return the whole object rather than a copy of a substring of it. In this case, lazy_sub_str produces a new lazy string object which shares the prefix string object with the original lazy string. This is incorrect because the lazy string data type destructively manipulates the prefix. It means that operations one one lazy string are mucking with the prefix of another lazy string. * lib.c (lazy_sub_str): When creating the new lazy string object, make a copy of the prefix string pulled from the original. We do the carefully: the copy of the prefix is made before the make_obj call which allocates the new lazy string, otherwise we create a wrong-way assignment from the perspective of generational GC. * tests/006/freeform-4.txr: New test case, from Frank. * tests/006/freeform-4.expected: Expected output of test case.
* sub-str: compat check now restores 215 behavior.Kaz Kylheku2021-01-252-3/+20
| | | | | | | | | | | * lib.c (sub_str): If compatibility is requested, with a value of 215 or less, then disable the optimization of returning the original string without making a copy. This was found to break the @(freeform) directive. That regression alerts me to the fact that I should have made this subject to compatibility; some user code could be affected. * txr.1: New compat note added, under 215.
* Version 249txr-249Kaz Kylheku2021-01-196-943/+1014
| | | | | | | | | | * RELNOTES: Updated. * configure, txr.1: Bumped version and date. * share/txr/stdlib/ver.tl: Likewise. * txr.vim, tl.vim: Regenerated.
* doc: add back discussion about (rcons ...) pattern.Kaz Kylheku2021-01-242-0/+16
| | | | | | | * txr.1: Add anote that a pattern a..b matches rcons syntax, and add examples. * tests/011/patmatch.tl: new examples from doc added as tests.
* matcher: rescind support for @(rcons ...) patterns.Kaz Kylheku2021-01-243-41/+31
| | | | | | | | | | | | | | | | | | | | | There is no longer any way to write a @(rcons ...) pattern using the range syntax, so there is no point in supporting that operator. The silly syntax @@a..@b which previously worked was actually due to a mistaken requirement in the parser. * share/txr/stdlib/match.tl (compile-range-match): Function moved closer to compile-atom-match, below compile-vec-match. The argument is now a range object containing patterns, so we pull it apart with from and to. (compile-atom-match): Pass range directly to compile-range-match; no need to construct (rcons ...) syntax. * tests/011/patmatch.tl: Add range tests from documentation and a few others. * txr.1: References to @(rcons ...) pattern scrubbed. One wrong #R pattern example corrected.
* printer: do not render @(rcons ...) in .. notation.Kaz Kylheku2021-01-241-2/+11
| | | | | | | | | | | | | | | | | | | | | | | This fixes the following print-read consistency issue. Both of these objects print as @a..@b. 1> '@(rcons a b) @a..b 2> '(rcons @a b) @a..b We want only the second case. After the this fix: 1> '(rcons @a b) @a..b 2> '@(rcons a b) @(rcons a b) * lib.c (obj_print_impl): In the sys:expr case, we check whether the head of the argument is rcons. If so, we adjust a few local variables and branch directly to the generic list case via goto to print the argument as (rcons ...) without conversion to dotdot range notation.
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