2 /* This file is part of NIT ( http://www.nitlanguage.org ).
4 * Copyright 2008-2009 Jean Privat <jean@pryen.org>
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
19 /* This grammar defines the NIT language. */
21 /*****************************************************************************/
23 /*****************************************************************************/
26 lowercase = ['a' .. 'z'];
27 uppercase = ['A' .. 'Z'];
29 letter = lowercase | uppercase | digit | '_';
34 any = [all - [cr + lf]];
36 // characers inside strings and super-strings (atomaton powaa)
38 = [any - [['"' + '{'] + '\']]
43 eol_helper = cr lf | cr | lf; // This takes care of different platforms
45 /*****************************************************************************/
47 /*****************************************************************************/
51 /*****************************************************************************/
53 /*****************************************************************************/
58 comment = '#' any* eol_helper;
60 kwmodule = 'package'|'module';
63 kwabstract = 'abstract';
64 kwinterface = 'interface';
65 kwenum = 'universal'|'enum';
66 kwspecial = 'special';
74 kwreadable = 'readable';
75 kwwritable = 'writable';
79 kwprotected = 'protected';
80 kwprivate = 'private';
81 kwintrude = 'intrude';
93 kwcontinue = 'continue';
106 kwnullable = 'nullable';
139 classid = uppercase letter*;
140 id = lowercase letter*;
141 attrid = '_' lowercase letter*;
144 float = digit* '.' digit+;
145 char = ''' [any - ''']* ''';
146 string = '"' str_body '"';
147 start_string = '"' str_body '{';
148 mid_string = '}' str_body '{';
149 end_string = '}' str_body '"';
152 /*****************************************************************************/
154 /*****************************************************************************/
158 /*****************************************************************************/
160 /*****************************************************************************/
162 /* MODULES *******************************************************************/
164 = moduledecl? [imports]:import* [classdefs]:classdef* implicit_top_class? implicit_main_class? {-> New module(moduledecl, [imports.import],[classdefs.classdef,implicit_top_class.classdef,implicit_main_class.classdef])};
167 = [doc]:no kwmodule no module_name [n2]:n1 {-> New moduledecl(doc.doc, kwmodule, module_name)};
170 = {std} [doc]:no visibility kwimport no module_name [n2]:n1 {-> New import.std(visibility, kwimport, module_name)}
171 | {no} [doc]:no visibility kwimport no kwend [n2]:n1 {-> New import.no(visibility, kwimport, kwend)}
174 implicit_top_class {-> classdef}
175 = propdefs_toplevel+ {-> New classdef.top([propdefs_toplevel.propdef])};
177 implicit_main_class {-> classdef?}
178 = implicit_main_meth {-> New classdef.main([implicit_main_meth.propdef])}
181 implicit_main_meth {-> propdef}
182 = [doc]:no stmts {-> New propdef.main_meth(Null, stmts.expr)}
183 | {n} [doc]:no stmtsn {-> New propdef.main_meth(Null, stmtsn.expr)}
186 /* CLASSES *******************************************************************/
188 = [doc]:no redef visibility classkind no classid formaldefs? [specials]:special* propdefs* [n2]:no kwend {-> New classdef.std(doc.doc, redef.kwredef, visibility, classkind, classid, [formaldefs.formaldef], [specials.superclass], [propdefs.propdef])};
190 = kwredef? {-> kwredef};
193 | {abstract} kwabstract kwclass
194 | {interface} kwinterface
198 formaldefs {-> formaldef*}
199 = obra no formaldef formaldefs_tail* [n2]:no cbra {-> [formaldef, formaldefs_tail.formaldef]};
200 formaldefs_tail {-> formaldef}
201 = comma no formaldef {-> formaldef};
203 = classid typing? {-> New formaldef(classid, typing.type)};
205 special {-> superclass}
206 = {special} no kwspecial [n2]:no type {-> New superclass(kwspecial, Null, type)}
207 | {super} no kwsuper [n2]:no type {-> New superclass(Null, kwsuper, type)}
210 propdefs~toplevel {-> propdef}
211 = propdef~toplevel n1 {-> propdef~toplevel.propdef}
213 propdef~toplevel {-> propdef}
214 = {meth} [doc]:no redef visibility kwmeth methid signature kwdo stmtso kwend? {-> New propdef.concrete_meth(doc.doc, redef.kwredef, visibility, kwmeth, methid, signature, stmtso.expr)}
215 | {assign_return} [doc]:no redef visibility kwmeth methid signature_withret assign no assign_return {-> New propdef.concrete_meth(doc.doc, redef.kwredef, visibility, kwmeth, methid, signature_withret.signature, assign_return.expr)}
216 !toplevel| {deferred} [doc]:no redef visibility kwmeth methid signature kwis kwabstract {-> New propdef.deferred_meth(doc.doc, redef.kwredef, visibility, kwmeth, methid, signature.signature)}
217 !toplevel| {intern} [doc]:no redef visibility kwmeth methid signature kwis kwintern {-> New propdef.intern_meth(doc.doc, redef.kwredef, visibility, kwmeth, methid, signature.signature)}
218 | {extern} [doc]:no redef visibility kwmeth methid signature kwis kwextern string? {-> New propdef.extern_meth(doc.doc, redef.kwredef, visibility, kwmeth, methid, signature.signature, string)}
219 !toplevel| {var} [doc]:no readable? writable? redef visibility kwvar attrid typing? {-> New propdef.attr(doc.doc, readable.able, writable.able, redef.kwredef, visibility, kwvar, attrid, Null, typing.type, Null)}
220 !toplevel| {var2} [doc]:no readable? writable? redef visibility kwvar attrid typing? assign [n2]:no expr {-> New propdef.attr(doc.doc, readable.able, writable.able, redef.kwredef, visibility, kwvar, attrid, Null, typing.type, expr)}
221 !toplevel| {var3} [doc]:no redef visibility kwvar id typing? writable2? {-> New propdef.attr(doc.doc, Null, writable2.able, redef.kwredef, visibility, kwvar, Null, id, typing.type, Null)}
222 !toplevel| {var4} [doc]:no redef visibility kwvar id typing? writable2? assign [n2]:no expr {-> New propdef.attr(doc.doc, Null, writable2.able, redef.kwredef, visibility, kwvar, Null, id, typing.type, expr)}
223 !toplevel| {init} [doc]:no redef visibility kwinit methid? signature kwdo stmtso kwend? {-> New propdef.concrete_init(doc.doc, redef.kwredef, visibility, kwinit, methid, signature, stmtso.expr)}
224 !toplevel| {type} [doc]:no redef visibility kwtype classid typing {-> New propdef.type(doc.doc, redef.kwredef, visibility, kwtype, classid, typing.type)}
227 = redef kwreadable {-> New able.read(redef.kwredef, kwreadable)}
230 = redef kwwritable {-> New able.write(redef.kwredef, Null, kwwritable)}
233 = redef visibility kwwritable {-> New able.write(redef.kwredef, visibility, kwwritable)}
237 = {public} {-> New visibility.public()}
238 | {private} kwprivate no {-> New visibility.private(kwprivate)}
239 | {protected} kwprotected no {-> New visibility.protected(kwprotected)}
240 | {intrude} kwintrude no {-> New visibility.intrude(kwintrude)}
244 = {id} id {-> New methid.id(id)}
245 | {plus} plus {-> New methid.plus(plus)}
246 | {minus} minus {-> New methid.minus(minus)}
247 | {star} star {-> New methid.star(star)}
248 | {slash} slash {-> New methid.slash(slash)}
249 | {percent} percent {-> New methid.percent(percent)}
250 | {eq} eq {-> New methid.eq(eq)}
251 | {ne} ne {-> New methid.ne(ne)}
252 | {le} le {-> New methid.le(le)}
253 | {ge} ge {-> New methid.ge(ge)}
254 | {lt} lt {-> New methid.lt(lt)}
255 | {gt} gt {-> New methid.gt(gt)}
256 | {ll} ll {-> New methid.ll(ll)}
257 | {gg} gg {-> New methid.gg(gg)}
258 | {bra} obra cbra {-> New methid.bra(obra, cbra)}
259 | {starship} starship {-> New methid.starship(starship)}
260 | {assign} id assign {-> New methid.assign(id, assign)}
261 | {braassign} obra cbra assign {-> New methid.braassign(obra, cbra, assign)}
264 signature~withret {-> signature}
265 = params? typing closure_decls {-> New signature([params.param], typing.type, [closure_decls.closure_decl])}
266 | {noclosures} params? typing no {-> New signature([params.param], typing.type, [])}
267 !withret| {noret} params? closure_decls {-> New signature([params.param], Null, [closure_decls.closure_decl])}
268 !withret| {noretnoclosures} params? no {-> New signature([params.param], Null, [])}
271 signature_noclosures {-> signature}
272 = params? typing? {-> New signature([params.param], typing.type, [])};
275 = opar no param params_tail* [n2]:no cpar {-> [param, params_tail.param]}
276 | {empty} opar no cpar {-> []}
278 params_tail {-> param}
279 = comma no param {-> param};
281 = {untyped} id {-> New param(id, Null, Null)}
282 | id typing dotdotdot? {-> New param(id, typing.type, dotdotdot)}
285 closure_decls {->closure_decl*}
286 = no closure_decl+ {-> [closure_decl]};
288 = kwbreak? bang id signature_noclosures n {-> New closure_decl(kwbreak, bang, id, signature_noclosures.signature, Null)}
289 | {optionnal} kwbreak? bang id signature_noclosures kwdo stmtso n {-> New closure_decl(kwbreak, bang, id, signature_noclosures.signature, stmtso.expr)}
290 | {assign} kwbreak? bang id signature_noclosures assign no assign_continue n {-> New closure_decl(kwbreak, bang, id, signature_noclosures.signature, assign_continue.expr)}
293 assign_return{-> expr}
294 = expr_final {-> New expr.return(Null, expr_final.expr)}
298 /* TYPES *********************************************************************/
300 = {simple} kwnullable? classid {-> New type(kwnullable, classid, [])}
301 !nobra | {generic} kwnullable? classid obra no types [n2]:no cbra {-> New type(kwnullable, classid, [types.type])}
304 = type types_tail* {-> [type, types_tail.type]};
306 = comma no type {-> type};
308 = column no type {-> type};
310 /* STATMENTS *****************************************************************/
311 stmtso~withelse~withend {-> expr?}
312 = {block} n stmtsn kwend {-> stmtsn.expr}
313 | {emptyblock} n kwend {-> New expr.block([])}
314 | {emptyoneline} kwend {-> New expr.block([])}
315 !withend| {oneline} stmt~withelse {-> stmt~withelse.expr}
318 = stmt stmts_tail* {-> New expr.block([stmt.expr, stmts_tail.expr])};
320 = stmt stmts_tail* n {-> New expr.block([stmt.expr, stmts_tail.expr])};
322 = n stmt {-> stmt.expr};
323 stmt~withelse {-> expr}
324 = {vardecl} vardecl~withelse {-> vardecl~withelse.expr}
325 | {assign} assignment~withelse {-> assignment~withelse.expr}
326 | {return} kwreturn expr_final~withelse? {-> New expr.return(kwreturn, expr_final~withelse.expr)}
327 | {break} kwbreak label? expr_final~withelse? {-> New expr.break(kwbreak, label, expr_final~withelse.expr)}
328 | {abort} kwabort {-> New expr.abort(kwabort)}
329 | {continue} kwcontinue label? expr_final~withelse? {-> New expr.continue(kwcontinue, label, expr_final~withelse.expr)}
330 | {do} do~withelse {-> do~withelse.expr}
331 | {if} if~withelse {-> if~withelse.expr}
332 | {while} while~withelse {-> while~withelse.expr}
333 | {loop} loop~withelse {-> loop~withelse.expr}
334 | {for} for~withelse {-> for~withelse.expr}
335 | {assert} assert~withelse {-> assert~withelse.expr}
336 | {call} recv id args_nopar closure_defs~withelse? {-> New expr.call(recv.expr, id, [args_nopar.expr], [closure_defs~withelse.closure_def])}
337 | {super} qualified? kwsuper args_nopar {-> New expr.super(qualified, kwsuper, [args_nopar.expr])}
338 | {init} recv kwinit args_nopar {-> New expr.init(recv.expr, kwinit, [args_nopar.expr])}
343 closure_defs~withelse {-> closure_def*}
344 = {one} closure_def_last~withelse {-> [closure_def_last~withelse.closure_def]}
345 | closure_def closure_defs~withelse {-> [closure_def, closure_defs~withelse.closure_def]}
348 closure_def_last~withelse {-> closure_def}
349 = bang [id]:closure_id idlist? kwdo stmtso_withend label {-> New closure_def(bang, id, [idlist.id], kwdo, stmtso_withend.expr, label)}
350 | {nolabel} bang [id]:closure_id idlist? kwdo stmtso~withelse {-> New closure_def(bang, id, [idlist.id], kwdo, stmtso~withelse.expr, Null)}
351 | {assign} bang [id]:closure_id idlist? assign no assign_continue~withelse {-> New closure_def(bang, id, [idlist.id], Null, assign_continue~withelse.expr, Null)}
354 closure_def {-> closure_def}
355 = bang [id]:closure_id idlist? kwdo n stmtsn {-> New closure_def(bang, id, [idlist.id], kwdo, stmtsn.expr, Null)}
356 | {empty} bang [id]:closure_id idlist? kwdo n {-> New closure_def(bang, id, [idlist.id], kwdo, Null, Null)}
363 assign_continue~withelse{-> expr}
364 = expr_final~withelse {-> New expr.continue(Null, Null, expr_final~withelse.expr)}
367 vardecl~withelse{-> expr}
368 = kwvar id typing? {-> New expr.vardecl(kwvar, id, typing.type, Null, Null)}
369 | {assign} kwvar id typing? assign no expr_final~withelse {-> New expr.vardecl(kwvar, id, typing.type, assign, expr_final~withelse.expr)}
372 assignment~withelse {-> expr}
373 = {attr} recv attrid assign expr_final~withelse {-> New expr.attr_assign(recv.expr, attrid, assign, expr_final~withelse.expr)}
374 | {call} recv id args assign expr_final~withelse {-> New expr.call_assign(recv.expr, id, [args.expr], assign, expr_final~withelse.expr)}
375 | {bra} expr_atom braargs assign expr_final~withelse {-> New expr.bra_assign(expr_atom.expr, [braargs.expr], assign, expr_final~withelse.expr)}
376 | {attr_re} recv attrid assign_op expr_final~withelse {-> New expr.attr_reassign(recv.expr, attrid, assign_op, expr_final~withelse.expr)}
377 | {call_re} recv id args assign_op expr_final~withelse {-> New expr.call_reassign(recv.expr, id, [args.expr], assign_op, expr_final~withelse.expr)}
378 | {bra_re} expr_atom braargs assign_op expr_final~withelse {-> New expr.bra_reassign(expr_atom.expr, [braargs.expr], assign_op, expr_final~withelse.expr)}
385 do~withelse {-> expr}
386 = kwdo stmtso_withend label {-> New expr.do(kwdo, stmtso_withend.expr, label)}
387 | {nolabel} kwdo stmtso~withelse {-> New expr.do(kwdo, stmtso~withelse.expr, Null)}
390 if~withelse {-> expr}
391 = {onelineelse} kwif no expr [n2]:no kwthen stmt_withelse kwelse stmtso~withelse {-> New expr.if(kwif, expr, stmt_withelse.expr, stmtso~withelse.expr)}
392 !withelse | {oneline} kwif no expr [n2]:no kwthen stmt {-> New expr.if(kwif, expr, stmt.expr, Null)}
393 !withelse | {block} kwif no expr [n2]:no kwthen [n3]:n stmtsn elsepartblock {-> New expr.if(kwif, expr, stmtsn.expr, elsepartblock.expr)}
394 !withelse | {emptyblock} kwif no expr [n2]:no kwthen [n3]:n? elsepartblock {-> New expr.if(kwif, expr, Null, elsepartblock.expr)}
396 elsepartblock {-> expr?}
397 = {else} kwelse stmtso {-> stmtso.expr}
398 | {empty} kwend {-> Null}
401 loop~withelse {-> expr}
402 = kwloop stmtso_withend label {-> New expr.loop(kwloop, stmtso_withend.expr, label)}
403 | {nolabel} kwloop stmtso~withelse {-> New expr.loop(kwloop, stmtso~withelse.expr, Null)}
406 while~withelse {-> expr}
407 = kwwhile no expr [n2]:no kwdo stmtso_withend label {-> New expr.while(kwwhile, expr, kwdo, stmtso_withend.expr, label)}
408 | {nolabel} kwwhile no expr [n2]:no kwdo stmtso~withelse {-> New expr.while(kwwhile, expr, kwdo, stmtso~withelse.expr, Null)}
411 for~withelse {-> expr}
412 = kwfor no [ids]:idlist [n2]:no kwin [n3]:no expr [n4]:no kwdo stmtso_withend label {-> New expr.for(kwfor, [ids.id], expr, kwdo, stmtso_withend.expr, label)}
413 | {nolabel} kwfor no [ids]:idlist [n2]:no kwin [n3]:no expr [n4]:no kwdo stmtso~withelse {-> New expr.for(kwfor, [ids.id], expr, kwdo, stmtso~withelse.expr, Null)}
416 assert~withelse {-> expr}
417 = {else} kwassert assertid? expr_final_withelse kwelse stmtso~withelse {-> New expr.assert(kwassert, assertid.id, expr_final_withelse.expr, stmtso~withelse.expr)}
418 !withelse| {noelse} kwassert assertid? expr_final {-> New expr.assert(kwassert, assertid.id, expr_final.expr, Null)}
423 /* EXPRESSIONS ***************************************************************/
424 expr_final~nopar~withelse~nobra {-> expr}
425 = expr~nopar~nobra {-> expr~nopar~nobra.expr}
426 | {closure_call} recv~nobra id args closure_defs~withelse {-> New expr.call(recv~nobra.expr, id, [args.expr], [closure_defs~withelse.closure_def])}
427 !nobra!nopar | {closure_bra} expr_atom braargs closure_defs~withelse {-> New expr.bra(expr_atom.expr, [braargs.expr], [closure_defs~withelse.closure_def])}
430 expr~nopar~nobra {-> expr}
431 = expr_and~nopar~nobra {-> expr_and~nopar~nobra.expr}
432 | {ifexpr} kwif [n1]:no expr [n2]:no kwthen [n3]:no [then]:expr [n4]:no kwelse [n5]:no [else]:expr~nopar~nobra {-> New expr.ifexpr(kwif, expr, kwthen, then, kwelse, else.expr)}
435 expr_and~nopar~nobra {-> expr}
436 = expr_not~nopar~nobra {-> expr_not~nopar~nobra.expr}
437 | {or} expr_and~nopar~nobra kwor no expr_not~nopar~nobra {-> New expr.or(expr_and~nopar~nobra.expr, expr_not~nopar~nobra.expr)}
438 | {and} expr_and~nopar~nobra kwand no expr_not~nopar~nobra {-> New expr.and(expr_and~nopar~nobra.expr, expr_not~nopar~nobra.expr)}
439 | {or_else} expr_and~nopar~nobra kwor kwelse no expr_not~nopar~nobra {-> New expr.or_else(expr_and~nopar~nobra.expr, expr_not~nopar~nobra.expr)}
442 expr_not~nopar~nobra {-> expr}
443 = expr_eq~nopar~nobra {-> expr_eq~nopar~nobra.expr}
444 | {not} kwnot no expr_not~nopar~nobra {-> New expr.not(kwnot, expr_not~nopar~nobra.expr)}
447 expr_eq~nopar~nobra {-> expr}
448 = expr_add~nopar~nobra {-> expr_add~nopar~nobra.expr}
449 | {eq} expr_add~nopar~nobra eq no [expr2]:expr_add~nopar~nobra {-> New expr.eq(expr_add~nopar~nobra.expr, expr2.expr)}
450 | {ee} expr_add~nopar~nobra kwis no [expr2]:expr_add~nopar~nobra {-> New expr.ee(expr_add~nopar~nobra.expr, expr2.expr)}
451 | {ne} expr_add~nopar~nobra ne no [expr2]:expr_add~nopar~nobra {-> New expr.ne(expr_add~nopar~nobra.expr, expr2.expr)}
452 | {lt} expr_add~nopar~nobra lt no [expr2]:expr_add~nopar~nobra {-> New expr.lt(expr_add~nopar~nobra.expr, expr2.expr)}
453 | {le} expr_add~nopar~nobra le no [expr2]:expr_add~nopar~nobra {-> New expr.le(expr_add~nopar~nobra.expr, expr2.expr)}
454 | {ll} expr_eq~nopar~nobra ll no [expr2]:expr_add~nopar~nobra {-> New expr.ll(expr_eq~nopar~nobra.expr, expr2.expr)}
455 | {gt} expr_add~nopar~nobra gt no [expr2]:expr_add~nopar~nobra {-> New expr.gt(expr_add~nopar~nobra.expr, expr2.expr)}
456 | {ge} expr_add~nopar~nobra ge no [expr2]:expr_add~nopar~nobra {-> New expr.ge(expr_add~nopar~nobra.expr, expr2.expr)}
457 | {gg} expr_eq~nopar~nobra gg no [expr2]:expr_add~nopar~nobra {-> New expr.gg(expr_eq~nopar~nobra.expr, expr2.expr)}
458 | {starship} expr_add~nopar~nobra starship no [expr2]:expr_add~nopar~nobra {-> New expr.starship(expr_add~nopar~nobra.expr, expr2.expr)}
459 | {isa} expr_add~nopar~nobra kwisa no type~nobra {-> New expr.isa(expr_add~nopar~nobra.expr, type~nobra.type)}
462 expr_add~nopar~nobra {-> expr}
463 = expr_mul~nopar~nobra {-> expr_mul~nopar~nobra.expr}
464 | {plus} expr_add~nopar~nobra plus no [expr2]:expr_mul~nopar~nobra {-> New expr.plus(expr_add~nopar~nobra.expr, expr2.expr)}
465 | {minus} expr_add~nopar~nobra minus no [expr2]:expr_mul~nopar~nobra {-> New expr.minus(expr_add~nopar~nobra.expr, expr2.expr)}
468 expr_mul~nopar~nobra {-> expr}
469 = expr_minus~nopar~nobra {-> expr_minus~nopar~nobra.expr}
470 | {star} expr_mul~nopar~nobra star no [expr2]:expr_minus~nopar~nobra {-> New expr.star(expr_mul~nopar~nobra.expr, expr2.expr)}
471 | {slash} expr_mul~nopar~nobra slash no [expr2]:expr_minus~nopar~nobra {-> New expr.slash(expr_mul~nopar~nobra.expr, expr2.expr)}
472 | {percent} expr_mul~nopar~nobra percent no [expr2]:expr_minus~nopar~nobra {-> New expr.percent(expr_mul~nopar~nobra.expr, expr2.expr)}
475 expr_minus~nopar~nobra {-> expr}
476 = expr_new~nopar~nobra {-> expr_new~nopar~nobra.expr}
477 | {minus} minus no expr_minus~nopar~nobra {-> New expr.uminus(minus, expr_minus~nopar~nobra.expr)}
478 | {once} kwonce no expr_minus~nopar~nobra {-> New expr.once(kwonce, expr_minus~nopar~nobra.expr)}
481 expr_new~nopar~nobra {-> expr}
482 = expr_atom~nopar~nobra {-> expr_atom~nopar~nobra.expr}
483 | {new} kwnew no type~nobra args {-> New expr.new(kwnew, type~nobra.type, Null, [args.expr])}
484 | {isset_attr} kwisset recv~nopar~nobra attrid {-> New expr.isset_attr(kwisset, recv~nopar~nobra.expr, attrid)}
487 expr_atom~nopar~nobra {-> expr}
488 = {attr} recv~nopar~nobra attrid {-> New expr.attr(recv~nopar~nobra.expr, attrid)}
489 | {call} recv~nopar~nobra id args {-> New expr.call(recv~nopar~nobra.expr, id, [args.expr], [])}
490 | {super} qualified? kwsuper args {-> New expr.super(qualified, kwsuper, [args.expr])}
491 | {init} recv~nopar~nobra kwinit args {-> New expr.init(recv~nopar~nobra.expr, kwinit, [args.expr])}
492 !nobra | {bra} expr_atom~nopar braargs {-> New expr.bra(expr_atom~nopar.expr, [braargs.expr], [])}
493 | {new} kwnew no type~nobra dot [n2]:no id args {-> New expr.new(kwnew, type~nobra.type, id, [args.expr])}
494 // !nopar to unambiguise 'foo[5].bar' between '(foo[5]).bar' and 'foo([5].bar),
495 !nobra!nopar | {range} obra no expr [n2]:no dotdot [n3]:no [expr2]:expr_nobra [n4]:no cbra {-> New expr.crange(expr, expr2.expr)}
496 !nobra!nopar | {orange} obra no expr [n2]:no dotdot [n3]:no [expr2]:expr_nobra [n4]:no [cbra]:obra {-> New expr.orange(expr, expr2.expr)}
497 !nobra!nopar | {array} braargs {-> New expr.array([braargs.expr])}
498 | {self} kwself {-> New expr.self(kwself)}
499 | {true} kwtrue {-> New expr.true(kwtrue)}
500 | {false} kwfalse {-> New expr.false(kwfalse)}
501 | {null} kwnull {-> New expr.null(kwnull)}
502 | {int} number {-> New expr.int(number)}
503 | {float} float {-> New expr.float(float)}
504 | {char} char {-> New expr.char(char)}
505 | {string} string {-> New expr.string(string)}
506 | {superstring} superstring {-> superstring.expr}
507 !nopar | {par} opar expr cpar {-> expr}
508 | {as_cast} expr_atom~nopar~nobra dot no kwas [n2]:no opar [n3]:no type [n4]:no cpar {-> New expr.as_cast(expr_atom~nopar~nobra.expr, kwas, type)}
509 | {as_notnull} expr_atom~nopar~nobra dot no kwas [n2]:no opar [n3]:no kwnot [n4]:no kwnull [n5]:no cpar {-> New expr.as_notnull(expr_atom~nopar~nobra.expr, kwas, kwnot, kwnull)}
512 superstring {-> expr}
513 = superstring_start superstring_middle* superstring_end {-> New expr.superstring([superstring_start.expr, superstring_middle.expr, superstring_end.expr])};
514 superstring_start {-> expr*}
515 = start_string_p no expr [n2]:no {-> [start_string_p.expr, expr]};
516 start_string_p {-> expr}
517 = start_string {-> New expr.start_string(start_string)};
518 superstring_middle {-> expr*}
519 = mid_string_p no expr [n2]:no {-> [mid_string_p.expr, expr]};
520 mid_string_p {-> expr}
521 = mid_string {-> New expr.mid_string(mid_string)};
522 superstring_end {-> expr}
523 = end_string {-> New expr.end_string(end_string)};
525 /* MISC **********************************************************************/
527 recv~nopar~nobra {-> expr}
528 = expr_atom~nopar~nobra dot no {-> expr_atom~nopar~nobra.expr}
529 | {implicit} {-> New expr.implicit_self()}
533 = opar no expr [n2]:no args_tail* cpar {-> [expr, args_tail.expr]}
534 | {emptypar} opar no cpar {-> []}
537 args_nopar {-> expr*}
538 = opar no expr [n2]:no args_tail* cpar {-> [expr, args_tail.expr]}
539 | {onearg} expr_nopar {-> [expr_nopar.expr]}
540 | {emptypar} opar no cpar {-> []}
544 = obra no expr [n2]:no args_tail* cbra {-> [expr, args_tail.expr]};
546 = comma no expr [n2]:no {-> expr};
548 = opar idlist_nopar cpar {-> [idlist_nopar.id]}
549 | {nopar} idlist_nopar {-> [idlist_nopar.id]}
551 idlist_nopar {-> id*}
552 = {single} id {-> [id]}
553 | {more} idlist_nopar no comma [n2]:no id {-> [idlist_nopar.id, id]}
556 module_name {-> module_name}
557 = {mod} modquad* id {-> New module_name(Null, [modquad.id], id)}
558 | {root} quad no modquad* id {-> New module_name(quad, [modquad.id], id)}
562 = {cla} modquad* classquad {-> New qualified([modquad.id], classquad.classid)}
563 | {mod} modquad+ {-> New qualified([modquad.id], Null)}
566 = id quad no {-> id};
567 classquad {-> classid}
568 = classid quad no {-> classid};
570 n1 = {a} comment | {b} eol;
572 = {a} n2? comment+ {-> New doc([comment])}
581 = {a} n2? comment+ eol+
585 /*****************************************************************************/
587 /*****************************************************************************/
589 module = moduledecl? [imports]:import* [classdefs]:classdef*;
592 = doc? kwmodule [name]:module_name;
594 import = {std} visibility kwimport [name]:module_name
595 | {no} visibility kwimport kwend
600 | {private} kwprivate
601 | {protected} kwprotected
602 | {intrude} kwintrude
605 classdef= {std} doc? kwredef? visibility classkind [id]:classid? [formaldefs]:formaldef* [superclasses]:superclass* [propdefs]:propdef*
606 | {top} [propdefs]:propdef*
607 | {main} [propdefs]:propdef*
611 | {abstract} kwabstract kwclass
612 | {interface} kwinterface
615 formaldef = [id]:classid type?;
616 superclass = kwspecial? kwsuper? type;
619 propdef = {attr} doc? [readable]:able? [writable]:able? kwredef? visibility kwvar [id]:attrid? [id2]:id? type? expr?
620 | {meth} doc? kwredef? visibility methid signature
621 | {deferred_meth} doc? kwredef? visibility kwmeth methid signature
622 | {intern_meth} doc? kwredef? visibility kwmeth methid signature
623 | {extern_meth} doc? kwredef? visibility kwmeth methid signature [extern]:string?
624 | {concrete_meth} doc? kwredef? visibility kwmeth methid signature [block]:expr?
625 | {concrete_init} doc? kwredef? visibility kwinit methid? signature [block]:expr?
626 | {main_meth} kwredef? [block]:expr?
627 | {type} doc? kwredef? visibility kwtype [id]:classid type
630 able = {read} kwredef? kwreadable
631 | {write} kwredef? visibility? kwwritable
634 methid = {id} id | {plus} plus | {minus} minus | {star} star | {slash} slash | {percent} percent | {eq} eq | {ne} ne | {le} le | {ge} ge | {lt} lt | {gt} gt | {ll} ll | {gg} gg | {bra} obra cbra | {starship} starship | {assign} id assign | {braassign} obra cbra assign;
636 signature = [params]:param* type? [closure_decls]:closure_decl*;
638 param = id type? dotdotdot?
641 closure_decl = kwbreak? bang id signature expr?
644 type = kwnullable? [id]:classid [types]:type*;
649 | {vardecl} kwvar id type? assign? expr?
650 | {return} kwreturn? expr?
651 | {break} kwbreak label? expr?
653 | {continue} kwcontinue? label? expr?
654 | {do} kwdo [block]:expr? label?
655 | {if} kwif expr [then]:expr? [else]:expr?
656 | {ifexpr} kwif expr kwthen [then]:expr kwelse [else]:expr
657 | {while} kwwhile expr kwdo [block]:expr? label?
658 | {loop} kwloop [block]:expr? label?
659 | {for} kwfor [ids]:id* expr kwdo [block]:expr? label?
660 | {assert} kwassert id? expr [else]:expr?
663 | {binop} expr [expr2]:expr
664 | {or} expr [expr2]:expr
665 | {and} expr [expr2]:expr
666 | {or_else} expr [expr2]:expr
668 | {eq} expr [expr2]:expr
669 | {ee} expr [expr2]:expr
670 | {ne} expr [expr2]:expr
671 | {lt} expr [expr2]:expr
672 | {le} expr [expr2]:expr
673 | {ll} expr [expr2]:expr
674 | {gt} expr [expr2]:expr
675 | {ge} expr [expr2]:expr
676 | {gg} expr [expr2]:expr
678 | {plus} expr [expr2]:expr
679 | {minus} expr [expr2]:expr
680 | {starship} expr [expr2]:expr
681 | {star} expr [expr2]:expr
682 | {slash} expr [expr2]:expr
683 | {percent} expr [expr2]:expr
684 | {uminus} minus expr
685 | {new} kwnew type id? [args]:expr*
686 | {attr} expr [id]:attrid
687 | {attr_assign} expr [id]:attrid assign [value]:expr
688 | {attr_reassign} expr [id]:attrid assign_op [value]:expr
689 | {call} expr id [args]:expr* [closure_defs]:closure_def*
690 | {call_assign} expr id [args]:expr* assign [value]:expr
691 | {call_reassign} expr id [args]:expr* assign_op [value]:expr
692 | {super} qualified? kwsuper [args]:expr*
693 | {init} expr kwinit [args]:expr*
694 | {bra} expr [args]:expr* [closure_defs]:closure_def*
695 | {bra_assign} expr [args]:expr* assign [value]:expr
696 | {bra_reassign} expr [args]:expr* assign_op [value]:expr
697 | {closure_call} id [args]:expr* [closure_defs]:closure_def*
699 | {var_assign} id assign [value]:expr
700 | {var_reassign} id assign_op [value]:expr
701 | {range} expr [expr2]:expr
702 | {crange} expr [expr2]:expr
703 | {orange} expr [expr2]:expr
704 | {array} [exprs]:expr*
714 | {start_string} [string]:start_string
715 | {mid_string} [string]:mid_string
716 | {end_string} [string]:end_string
717 | {superstring} [exprs]:expr*
719 | {as_cast} expr kwas type
720 | {as_notnull} expr kwas kwnot kwnull
721 | {isset_attr} kwisset expr [id]:attrid
729 = bang [id]:closure_id [ids]:id* kwdo? expr? label?
736 module_name = quad? [path]:id* id;
738 qualified = id* classid? ;
742 /*****************************************************************************/