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 - '''] - '\'] ''') | (''' '\' any ''');
146 string = '"' str_body '"';
147 start_string = '"' str_body '{';
148 mid_string = '}' str_body '{';
149 end_string = '}' str_body '"';
150 bad_char = ''' '\'? any;
151 bad_string = ('"'|'}') str_body;
154 /*****************************************************************************/
156 /*****************************************************************************/
160 /*****************************************************************************/
162 /*****************************************************************************/
164 /* MODULES *******************************************************************/
166 = 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])};
169 = [doc]:no kwmodule no module_name [n2]:n1 {-> New moduledecl(doc.doc, kwmodule, module_name)};
172 = {std} [doc]:no visibility kwimport no module_name [n2]:n1 {-> New import.std(visibility, kwimport, module_name)}
173 | {no} [doc]:no visibility kwimport no kwend [n2]:n1 {-> New import.no(visibility, kwimport, kwend)}
176 implicit_top_class {-> classdef}
177 = propdefs_toplevel+ {-> New classdef.top([propdefs_toplevel.propdef])};
179 implicit_main_class {-> classdef?}
180 = implicit_main_meth {-> New classdef.main([implicit_main_meth.propdef])}
183 implicit_main_meth {-> propdef}
184 = [doc]:no stmts {-> New propdef.main_meth(Null, stmts.expr)}
185 | {n} [doc]:no stmtsn {-> New propdef.main_meth(Null, stmtsn.expr)}
188 /* CLASSES *******************************************************************/
190 = [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], kwend)};
192 = kwredef? {-> kwredef};
195 | {abstract} kwabstract kwclass
196 | {interface} kwinterface
201 formaldefs {-> formaldef*}
202 = obra no formaldef formaldefs_tail* [n2]:no cbra {-> [formaldef, formaldefs_tail.formaldef]};
203 formaldefs_tail {-> formaldef}
204 = comma no formaldef {-> formaldef};
206 = classid typing? {-> New formaldef(classid, typing.type)};
208 special {-> superclass}
209 = {special} no kwspecial [n2]:no type {-> New superclass(kwspecial, Null, type)}
210 | {super} no kwsuper [n2]:no type {-> New superclass(Null, kwsuper, type)}
213 propdefs~toplevel {-> propdef}
214 = propdef~toplevel n1 {-> propdef~toplevel.propdef}
216 propdef~toplevel {-> propdef}
217 = {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)}
218 | {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)}
219 !toplevel| {deferred} [doc]:no redef visibility kwmeth methid signature kwis kwabstract {-> New propdef.deferred_meth(doc.doc, redef.kwredef, visibility, kwmeth, methid, signature.signature)}
220 !toplevel| {intern} [doc]:no redef visibility kwmeth methid signature kwis kwintern {-> New propdef.intern_meth(doc.doc, redef.kwredef, visibility, kwmeth, methid, signature.signature)}
221 | {extern} [doc]:no redef visibility kwmeth methid signature kwis kwextern string? extern_calls? {-> New propdef.extern_meth(doc.doc, redef.kwredef, visibility, kwmeth, methid, signature.signature, string, extern_calls)}
222 !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)}
223 !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)}
224 !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)}
225 !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)}
226 !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)}
227 !toplevel| {type} [doc]:no redef visibility kwtype classid typing {-> New propdef.type(doc.doc, redef.kwredef, visibility, kwtype, classid, typing.type)}
228 !toplevel| {extern_init} [doc]:no redef visibility kwnew methid? signature kwis kwextern string? extern_calls? {-> New propdef.extern_init(doc.doc, redef.kwredef, visibility, kwnew, methid, signature, string, extern_calls)}
231 = redef kwreadable {-> New able.read(redef.kwredef, kwreadable)}
234 = redef kwwritable {-> New able.write(redef.kwredef, Null, kwwritable)}
237 = redef visibility kwwritable {-> New able.write(redef.kwredef, visibility, kwwritable)}
241 = {public} {-> New visibility.public()}
242 | {private} kwprivate no {-> New visibility.private(kwprivate)}
243 | {protected} kwprotected no {-> New visibility.protected(kwprotected)}
244 | {intrude} kwintrude no {-> New visibility.intrude(kwintrude)}
248 = {id} id {-> New methid.id(id)}
249 | {plus} plus {-> New methid.plus(plus)}
250 | {minus} minus {-> New methid.minus(minus)}
251 | {star} star {-> New methid.star(star)}
252 | {slash} slash {-> New methid.slash(slash)}
253 | {percent} percent {-> New methid.percent(percent)}
254 | {eq} eq {-> New methid.eq(eq)}
255 | {ne} ne {-> New methid.ne(ne)}
256 | {le} le {-> New methid.le(le)}
257 | {ge} ge {-> New methid.ge(ge)}
258 | {lt} lt {-> New methid.lt(lt)}
259 | {gt} gt {-> New methid.gt(gt)}
260 | {ll} ll {-> New methid.ll(ll)}
261 | {gg} gg {-> New methid.gg(gg)}
262 | {bra} obra cbra {-> New methid.bra(obra, cbra)}
263 | {starship} starship {-> New methid.starship(starship)}
264 | {assign} id assign {-> New methid.assign(id, assign)}
265 | {braassign} obra cbra assign {-> New methid.braassign(obra, cbra, assign)}
268 signature~withret {-> signature}
269 = opar no params? cpar typing [no2]:no closure_decls? {-> New signature(opar, [params.param], cpar, typing.type, [closure_decls.closure_decl])}
270 !withret| {noret} opar no params? cpar [no2]:no closure_decls? {-> New signature(opar, [params.param], cpar, Null, [closure_decls.closure_decl])}
271 | {nopar} typing no closure_decls? {-> New signature(Null, [], Null, typing.type, [closure_decls.closure_decl])}
272 !withret| {noparnoret} no closure_decls? {-> New signature(Null, [], Null, Null, [closure_decls.closure_decl])}
275 signature_noclosures {-> signature}
276 = opar no params? cpar typing? {-> New signature(opar, [params.param], cpar, typing.type, [])}
277 | {nopar} typing? {-> New signature(Null, [], Null, typing.type, [])}
281 = param params_tail* [n2]:no {-> [param, params_tail.param] }
283 params_tail {-> param}
284 = comma no param {-> param};
286 = {untyped} id {-> New param(id, Null, Null)}
287 | id typing dotdotdot? {-> New param(id, typing.type, dotdotdot)}
290 closure_decls {->closure_decl*}
291 = closure_decl+ {-> [closure_decl]};
293 = kwbreak? bang id signature_noclosures n {-> New closure_decl(kwbreak, bang, id, signature_noclosures.signature, Null)}
294 | {optionnal} kwbreak? bang id signature_noclosures kwdo stmtso n {-> New closure_decl(kwbreak, bang, id, signature_noclosures.signature, stmtso.expr)}
295 | {assign} kwbreak? bang id signature_noclosures assign no assign_continue n {-> New closure_decl(kwbreak, bang, id, signature_noclosures.signature, assign_continue.expr)}
298 assign_return{-> expr}
299 = expr_final {-> New expr.return(Null, expr_final.expr)}
302 extern_calls {-> extern_calls}
303 = kwimport no extern_call extern_call_tail* {-> New extern_calls( kwimport, [extern_call, extern_call_tail.extern_call] )}
305 extern_call_tail {-> extern_call}
306 = comma no extern_call {-> extern_call};
307 extern_call {-> extern_call}
308 = {prop} extern_call_prop {-> extern_call_prop.extern_call}
309 | {cast} extern_call_cast {-> extern_call_cast.extern_call}
310 | {super} kwsuper {-> New extern_call.super( kwsuper )}
312 extern_call_prop {-> extern_call}
313 = {local} methid {-> New extern_call.local_prop( methid )}
314 | {full} classid quad methid {-> New extern_call.full_prop( classid, quad, methid )}
315 | {init} classid {-> New extern_call.init_prop( classid )}
317 extern_call_cast {-> extern_call}
318 = {as_cast} [from_type]:type kwas [n2]:no opar [n3]:no [to_type]:type [n4]:no cpar {-> New extern_call.cast_as(from_type, kwas, to_type)}
319 | {as_nullable} type kwas [n2]:no kwnullable {-> New extern_call.as_nullable( type, kwas, kwnullable)}
320 | {as_not_nullable} type kwas [n2]:no kwnot [n3]:no kwnullable {-> New extern_call.as_not_nullable( type, kwas, kwnot, kwnullable)}
324 /* TYPES *********************************************************************/
326 = {simple} kwnullable? classid {-> New type(kwnullable, classid, [])}
327 !nobra | {generic} kwnullable? classid obra no types [n2]:no cbra {-> New type(kwnullable, classid, [types.type])}
330 = type types_tail* {-> [type, types_tail.type]};
332 = comma no type {-> type};
334 = column no type {-> type};
336 /* STATMENTS *****************************************************************/
337 stmtso~withelse~withend {-> expr?}
338 = {block} n stmtsnend {-> stmtsnend.expr}
339 | {emptyblock} n kwend {-> New expr.block([], kwend)}
340 | {emptyoneline} kwend {-> New expr.block([], kwend)}
341 !withend| {oneline} stmt~withelse {-> stmt~withelse.expr}
344 = stmt stmts_tail* {-> New expr.block([stmt.expr, stmts_tail.expr], Null)};
346 = stmt stmts_tail* n {-> New expr.block([stmt.expr, stmts_tail.expr], Null)};
348 = stmt stmts_tail* n kwend {-> New expr.block([stmt.expr, stmts_tail.expr], kwend)};
350 = n stmt {-> stmt.expr};
351 stmt~withelse {-> expr}
352 = {vardecl} vardecl~withelse {-> vardecl~withelse.expr}
353 | {assign} assignment~withelse {-> assignment~withelse.expr}
354 | {return} kwreturn expr_final~withelse? {-> New expr.return(kwreturn, expr_final~withelse.expr)}
355 | {break} kwbreak label? expr_final~withelse? {-> New expr.break(kwbreak, label, expr_final~withelse.expr)}
356 | {abort} kwabort {-> New expr.abort(kwabort)}
357 | {continue} kwcontinue label? expr_final~withelse? {-> New expr.continue(kwcontinue, label, expr_final~withelse.expr)}
358 | {do} do~withelse {-> do~withelse.expr}
359 | {if} if~withelse {-> if~withelse.expr}
360 | {while} while~withelse {-> while~withelse.expr}
361 | {loop} loop~withelse {-> loop~withelse.expr}
362 | {for} for~withelse {-> for~withelse.expr}
363 | {assert} assert~withelse {-> assert~withelse.expr}
364 | {call} recv id args_nopar closure_defs~withelse? {-> New expr.call(recv.expr, id, args_nopar.exprs, [closure_defs~withelse.closure_def])}
365 | {super} qualified? kwsuper args_nopar {-> New expr.super(qualified, kwsuper, args_nopar.exprs)}
366 | {init} recv kwinit args_nopar {-> New expr.init(recv.expr, kwinit, args_nopar.exprs)}
371 closure_defs~withelse {-> closure_def*}
372 = {one} closure_def_last~withelse {-> [closure_def_last~withelse.closure_def]}
373 | closure_def closure_defs~withelse {-> [closure_def, closure_defs~withelse.closure_def]}
376 closure_def_last~withelse {-> closure_def}
377 = bang [id]:closure_id idlist? kwdo stmtso_withend label {-> New closure_def(bang, id, [idlist.id], kwdo, stmtso_withend.expr, label)}
378 | {nolabel} bang [id]:closure_id idlist? kwdo stmtso~withelse {-> New closure_def(bang, id, [idlist.id], kwdo, stmtso~withelse.expr, Null)}
379 | {assign} bang [id]:closure_id idlist? assign no assign_continue~withelse {-> New closure_def(bang, id, [idlist.id], Null, assign_continue~withelse.expr, Null)}
382 closure_def {-> closure_def}
383 = bang [id]:closure_id idlist? kwdo n stmtsn {-> New closure_def(bang, id, [idlist.id], kwdo, stmtsn.expr, Null)}
384 | {empty} bang [id]:closure_id idlist? kwdo n {-> New closure_def(bang, id, [idlist.id], kwdo, Null, Null)}
391 assign_continue~withelse{-> expr}
392 = expr_final~withelse {-> New expr.continue(Null, Null, expr_final~withelse.expr)}
395 vardecl~withelse{-> expr}
396 = kwvar id typing? {-> New expr.vardecl(kwvar, id, typing.type, Null, Null)}
397 | {assign} kwvar id typing? assign no expr_final~withelse {-> New expr.vardecl(kwvar, id, typing.type, assign, expr_final~withelse.expr)}
400 assignment~withelse {-> expr}
401 = {attr} recv attrid assign expr_final~withelse {-> New expr.attr_assign(recv.expr, attrid, assign, expr_final~withelse.expr)}
402 | {call} recv id args assign expr_final~withelse {-> New expr.call_assign(recv.expr, id, args.exprs, assign, expr_final~withelse.expr)}
403 | {bra} expr_atom braargs assign expr_final~withelse {-> New expr.bra_assign(expr_atom.expr, braargs.exprs, assign, expr_final~withelse.expr)}
404 | {attr_re} recv attrid assign_op expr_final~withelse {-> New expr.attr_reassign(recv.expr, attrid, assign_op, expr_final~withelse.expr)}
405 | {call_re} recv id args assign_op expr_final~withelse {-> New expr.call_reassign(recv.expr, id, args.exprs, assign_op, expr_final~withelse.expr)}
406 | {bra_re} expr_atom braargs assign_op expr_final~withelse {-> New expr.bra_reassign(expr_atom.expr, braargs.exprs, assign_op, expr_final~withelse.expr)}
413 do~withelse {-> expr}
414 = kwdo stmtso_withend label {-> New expr.do(kwdo, stmtso_withend.expr, label)}
415 | {nolabel} kwdo stmtso~withelse {-> New expr.do(kwdo, stmtso~withelse.expr, Null)}
418 if~withelse {-> expr}
419 = {onelineelse} kwif no expr [n2]:no kwthen stmt_withelse kwelse stmtso~withelse {-> New expr.if(kwif, expr, stmt_withelse.expr, stmtso~withelse.expr)}
420 !withelse | {oneline} kwif no expr [n2]:no kwthen stmt {-> New expr.if(kwif, expr, stmt.expr, Null)}
421 !withelse | {block} kwif no expr [n2]:no kwthen [n3]:n stmtsn elsepartblock {-> New expr.if(kwif, expr, stmtsn.expr, elsepartblock.expr)}
422 !withelse | {emptyblock} kwif no expr [n2]:no kwthen [n3]:n? elsepartblock {-> New expr.if(kwif, expr, Null, elsepartblock.expr)}
424 elsepartblock {-> expr?}
425 = {else} kwelse stmtso {-> stmtso.expr}
426 | {empty} kwend {-> New expr.block([], kwend)}
429 loop~withelse {-> expr}
430 = kwloop stmtso_withend label {-> New expr.loop(kwloop, stmtso_withend.expr, label)}
431 | {nolabel} kwloop stmtso~withelse {-> New expr.loop(kwloop, stmtso~withelse.expr, Null)}
434 while~withelse {-> expr}
435 = kwwhile no expr [n2]:no kwdo stmtso_withend label {-> New expr.while(kwwhile, expr, kwdo, stmtso_withend.expr, label)}
436 | {nolabel} kwwhile no expr [n2]:no kwdo stmtso~withelse {-> New expr.while(kwwhile, expr, kwdo, stmtso~withelse.expr, Null)}
439 for~withelse {-> expr}
440 = 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)}
441 | {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)}
444 assert~withelse {-> expr}
445 = {else} kwassert assertid? expr_final_withelse kwelse stmtso~withelse {-> New expr.assert(kwassert, assertid.id, expr_final_withelse.expr, stmtso~withelse.expr)}
446 !withelse| {noelse} kwassert assertid? expr_final {-> New expr.assert(kwassert, assertid.id, expr_final.expr, Null)}
451 /* EXPRESSIONS ***************************************************************/
452 expr_final~nopar~withelse~nobra {-> expr}
453 = expr~nopar~nobra {-> expr~nopar~nobra.expr}
454 | {closure_call} recv~nobra id args closure_defs~withelse {-> New expr.call(recv~nobra.expr, id, args.exprs, [closure_defs~withelse.closure_def])}
455 !nobra!nopar | {closure_bra} expr_atom braargs closure_defs~withelse {-> New expr.bra(expr_atom.expr, braargs.exprs, [closure_defs~withelse.closure_def])}
458 expr~nopar~nobra {-> expr}
459 = expr_and~nopar~nobra {-> expr_and~nopar~nobra.expr}
460 | {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)}
463 expr_and~nopar~nobra {-> expr}
464 = expr_not~nopar~nobra {-> expr_not~nopar~nobra.expr}
465 | {or} expr_and~nopar~nobra kwor no expr_not~nopar~nobra {-> New expr.or(expr_and~nopar~nobra.expr, expr_not~nopar~nobra.expr)}
466 | {and} expr_and~nopar~nobra kwand no expr_not~nopar~nobra {-> New expr.and(expr_and~nopar~nobra.expr, expr_not~nopar~nobra.expr)}
467 | {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)}
470 expr_not~nopar~nobra {-> expr}
471 = expr_eq~nopar~nobra {-> expr_eq~nopar~nobra.expr}
472 | {not} kwnot no expr_not~nopar~nobra {-> New expr.not(kwnot, expr_not~nopar~nobra.expr)}
475 expr_eq~nopar~nobra {-> expr}
476 = expr_add~nopar~nobra {-> expr_add~nopar~nobra.expr}
477 | {eq} expr_add~nopar~nobra eq no [expr2]:expr_add~nopar~nobra {-> New expr.eq(expr_add~nopar~nobra.expr, expr2.expr)}
478 | {ee} expr_add~nopar~nobra kwis no [expr2]:expr_add~nopar~nobra {-> New expr.ee(expr_add~nopar~nobra.expr, expr2.expr)}
479 | {ne} expr_add~nopar~nobra ne no [expr2]:expr_add~nopar~nobra {-> New expr.ne(expr_add~nopar~nobra.expr, expr2.expr)}
480 | {lt} expr_add~nopar~nobra lt no [expr2]:expr_add~nopar~nobra {-> New expr.lt(expr_add~nopar~nobra.expr, expr2.expr)}
481 | {le} expr_add~nopar~nobra le no [expr2]:expr_add~nopar~nobra {-> New expr.le(expr_add~nopar~nobra.expr, expr2.expr)}
482 | {ll} expr_eq~nopar~nobra ll no [expr2]:expr_add~nopar~nobra {-> New expr.ll(expr_eq~nopar~nobra.expr, expr2.expr)}
483 | {gt} expr_add~nopar~nobra gt no [expr2]:expr_add~nopar~nobra {-> New expr.gt(expr_add~nopar~nobra.expr, expr2.expr)}
484 | {ge} expr_add~nopar~nobra ge no [expr2]:expr_add~nopar~nobra {-> New expr.ge(expr_add~nopar~nobra.expr, expr2.expr)}
485 | {gg} expr_eq~nopar~nobra gg no [expr2]:expr_add~nopar~nobra {-> New expr.gg(expr_eq~nopar~nobra.expr, expr2.expr)}
486 | {starship} expr_add~nopar~nobra starship no [expr2]:expr_add~nopar~nobra {-> New expr.starship(expr_add~nopar~nobra.expr, expr2.expr)}
487 | {isa} expr_add~nopar~nobra kwisa no type~nobra {-> New expr.isa(expr_add~nopar~nobra.expr, type~nobra.type)}
490 expr_add~nopar~nobra {-> expr}
491 = expr_mul~nopar~nobra {-> expr_mul~nopar~nobra.expr}
492 | {plus} expr_add~nopar~nobra plus no [expr2]:expr_mul~nopar~nobra {-> New expr.plus(expr_add~nopar~nobra.expr, expr2.expr)}
493 | {minus} expr_add~nopar~nobra minus no [expr2]:expr_mul~nopar~nobra {-> New expr.minus(expr_add~nopar~nobra.expr, expr2.expr)}
496 expr_mul~nopar~nobra {-> expr}
497 = expr_minus~nopar~nobra {-> expr_minus~nopar~nobra.expr}
498 | {star} expr_mul~nopar~nobra star no [expr2]:expr_minus~nopar~nobra {-> New expr.star(expr_mul~nopar~nobra.expr, expr2.expr)}
499 | {slash} expr_mul~nopar~nobra slash no [expr2]:expr_minus~nopar~nobra {-> New expr.slash(expr_mul~nopar~nobra.expr, expr2.expr)}
500 | {percent} expr_mul~nopar~nobra percent no [expr2]:expr_minus~nopar~nobra {-> New expr.percent(expr_mul~nopar~nobra.expr, expr2.expr)}
503 expr_minus~nopar~nobra {-> expr}
504 = expr_new~nopar~nobra {-> expr_new~nopar~nobra.expr}
505 | {minus} minus no expr_minus~nopar~nobra {-> New expr.uminus(minus, expr_minus~nopar~nobra.expr)}
506 | {once} kwonce no expr_minus~nopar~nobra {-> New expr.once(kwonce, expr_minus~nopar~nobra.expr)}
509 expr_new~nopar~nobra {-> expr}
510 = expr_atom~nopar~nobra {-> expr_atom~nopar~nobra.expr}
511 | {new} kwnew no type~nobra args {-> New expr.new(kwnew, type~nobra.type, Null, args.exprs)}
512 | {isset_attr} kwisset recv~nopar~nobra attrid {-> New expr.isset_attr(kwisset, recv~nopar~nobra.expr, attrid)}
515 expr_atom~nopar~nobra {-> expr}
516 = {attr} recv~nopar~nobra attrid {-> New expr.attr(recv~nopar~nobra.expr, attrid)}
517 | {call} recv~nopar~nobra id args {-> New expr.call(recv~nopar~nobra.expr, id, args.exprs, [])}
518 | {super} qualified? kwsuper args {-> New expr.super(qualified, kwsuper, args.exprs)}
519 | {init} recv~nopar~nobra kwinit args {-> New expr.init(recv~nopar~nobra.expr, kwinit, args.exprs)}
520 !nobra | {bra} expr_atom~nopar braargs {-> New expr.bra(expr_atom~nopar.expr, braargs.exprs, [])}
521 | {new} kwnew no type~nobra dot [n2]:no id args {-> New expr.new(kwnew, type~nobra.type, id, args.exprs)}
522 // !nopar to unambiguise 'foo[5].bar' between '(foo[5]).bar' and 'foo([5].bar),
523 !nobra!nopar | {range} obra no expr [n2]:no dotdot [n3]:no [expr2]:expr_nobra [n4]:no cbra {-> New expr.crange(obra, expr, expr2.expr, cbra)}
524 !nobra!nopar | {orange} obra no expr [n2]:no dotdot [n3]:no [expr2]:expr_nobra [n4]:no [cbra]:obra {-> New expr.orange(obra, expr, expr2.expr, cbra)}
525 !nobra!nopar | {array} braargs {-> New expr.array(braargs.exprs)}
526 | {self} kwself {-> New expr.self(kwself)}
527 | {true} kwtrue {-> New expr.true(kwtrue)}
528 | {false} kwfalse {-> New expr.false(kwfalse)}
529 | {null} kwnull {-> New expr.null(kwnull)}
530 | {int} number {-> New expr.int(number)}
531 | {float} float {-> New expr.float(float)}
532 | {char} char {-> New expr.char(char)}
533 | {string} string {-> New expr.string(string)}
534 | {superstring} superstring {-> superstring.expr}
535 !nopar | {par} opar expr cpar {-> New expr.par(opar, expr, cpar)}
536 | {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, opar, type, cpar)}
537 | {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, opar, kwnot, kwnull, cpar)}
540 superstring {-> expr}
541 = superstring_start superstring_middle* superstring_end {-> New expr.superstring([superstring_start.expr, superstring_middle.expr, superstring_end.expr])};
542 superstring_start {-> expr*}
543 = start_string_p no expr [n2]:no {-> [start_string_p.expr, expr]};
544 start_string_p {-> expr}
545 = start_string {-> New expr.start_string(start_string)};
546 superstring_middle {-> expr*}
547 = mid_string_p no expr [n2]:no {-> [mid_string_p.expr, expr]};
548 mid_string_p {-> expr}
549 = mid_string {-> New expr.mid_string(mid_string)};
550 superstring_end {-> expr}
551 = end_string {-> New expr.end_string(end_string)};
553 /* MISC **********************************************************************/
555 recv~nopar~nobra {-> expr}
556 = expr_atom~nopar~nobra dot no {-> expr_atom~nopar~nobra.expr}
557 | {implicit} {-> New expr.implicit_self()}
561 = opar no expr_list cpar {-> New exprs.par(opar, [expr_list.expr], cpar) }
562 | {emptypar} opar no cpar {-> New exprs.par(opar, [], cpar) }
563 | {empty} {-> New exprs.list([])}
565 args_nopar {-> exprs}
566 = opar no expr_list cpar {-> New exprs.par(opar, [expr_list.expr], cpar) }
567 | {onearg} expr_nopar {-> New exprs.list([expr_nopar.expr])}
568 | {emptypar} opar no cpar {-> New exprs.par(opar, [], cpar) }
569 | {empty} {-> New exprs.list([])}
572 = obra no expr_list cbra {-> New exprs.bra(obra, [expr_list.expr], cbra)};
574 = expr [n2]:no expr_tail* {-> [expr, expr_tail.expr]};
576 = comma no expr [n2]:no {-> expr};
578 = opar idlist_nopar cpar {-> [idlist_nopar.id]}
579 | {nopar} idlist_nopar {-> [idlist_nopar.id]}
581 idlist_nopar {-> id*}
582 = {single} id {-> [id]}
583 | {more} idlist_nopar no comma [n2]:no id {-> [idlist_nopar.id, id]}
586 module_name {-> module_name}
587 = {mod} modquad* id {-> New module_name(Null, [modquad.id], id)}
588 | {root} quad no modquad* id {-> New module_name(quad, [modquad.id], id)}
592 = {cla} modquad* classquad {-> New qualified([modquad.id], classquad.classid)}
593 | {mod} modquad+ {-> New qualified([modquad.id], Null)}
596 = id quad no {-> id};
597 classquad {-> classid}
598 = classid quad no {-> classid};
600 n1 = {a} comment | {b} eol;
602 = {a} n2? comment+ {-> New doc([comment])}
611 = {a} n2? comment+ eol+
615 /*****************************************************************************/
617 /*****************************************************************************/
619 module = moduledecl? [imports]:import* [classdefs]:classdef*;
622 = doc? kwmodule [name]:module_name;
624 import = {std} visibility kwimport [name]:module_name
625 | {no} visibility kwimport kwend
630 | {private} kwprivate
631 | {protected} kwprotected
632 | {intrude} kwintrude
635 classdef= {std} doc? kwredef? visibility classkind [id]:classid? [formaldefs]:formaldef* [superclasses]:superclass* [propdefs]:propdef* kwend
636 | {top} [propdefs]:propdef*
637 | {main} [propdefs]:propdef*
641 | {abstract} kwabstract kwclass
642 | {interface} kwinterface
646 formaldef = [id]:classid type?;
647 superclass = kwspecial? kwsuper? type;
650 propdef = {attr} doc? [readable]:able? [writable]:able? kwredef? visibility kwvar [id]:attrid? [id2]:id? type? expr?
651 | {meth} doc? kwredef? visibility methid signature
652 | {deferred_meth} doc? kwredef? visibility kwmeth methid signature
653 | {intern_meth} doc? kwredef? visibility kwmeth methid signature
654 | {extern_meth} doc? kwredef? visibility kwmeth methid signature [extern]:string? extern_calls?
655 | {concrete_meth} doc? kwredef? visibility kwmeth methid signature [block]:expr?
656 | {concrete_init} doc? kwredef? visibility kwinit methid? signature [block]:expr?
657 | {extern_init} doc? kwredef? visibility kwnew methid? signature [extern]:string? extern_calls?
658 | {main_meth} kwredef? [block]:expr?
659 | {type} doc? kwredef? visibility kwtype [id]:classid type
662 able = {read} kwredef? kwreadable
663 | {write} kwredef? visibility? kwwritable
666 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;
668 signature = opar? [params]:param* cpar? type? [closure_decls]:closure_decl*;
670 param = id type? dotdotdot?
673 closure_decl = kwbreak? bang id signature expr?
676 type = kwnullable? [id]:classid [types]:type*;
680 expr = {block} expr* kwend?
681 | {vardecl} kwvar id type? assign? expr?
682 | {return} kwreturn? expr?
683 | {break} kwbreak label? expr?
685 | {continue} kwcontinue? label? expr?
686 | {do} kwdo [block]:expr? label?
687 | {if} kwif expr [then]:expr? [else]:expr?
688 | {ifexpr} kwif expr kwthen [then]:expr kwelse [else]:expr
689 | {while} kwwhile expr kwdo [block]:expr? label?
690 | {loop} kwloop [block]:expr? label?
691 | {for} kwfor [ids]:id* expr kwdo [block]:expr? label?
692 | {assert} kwassert id? expr [else]:expr?
695 | {binop} expr [expr2]:expr
696 | {or} expr [expr2]:expr
697 | {and} expr [expr2]:expr
698 | {or_else} expr [expr2]:expr
700 | {eq} expr [expr2]:expr
701 | {ee} expr [expr2]:expr
702 | {ne} expr [expr2]:expr
703 | {lt} expr [expr2]:expr
704 | {le} expr [expr2]:expr
705 | {ll} expr [expr2]:expr
706 | {gt} expr [expr2]:expr
707 | {ge} expr [expr2]:expr
708 | {gg} expr [expr2]:expr
710 | {plus} expr [expr2]:expr
711 | {minus} expr [expr2]:expr
712 | {starship} expr [expr2]:expr
713 | {star} expr [expr2]:expr
714 | {slash} expr [expr2]:expr
715 | {percent} expr [expr2]:expr
716 | {uminus} minus expr
717 | {new} kwnew type id? [args]:exprs
718 | {attr} expr [id]:attrid
719 | {attr_assign} expr [id]:attrid assign [value]:expr
720 | {attr_reassign} expr [id]:attrid assign_op [value]:expr
721 | {call} expr id [args]:exprs [closure_defs]:closure_def*
722 | {call_assign} expr id [args]:exprs assign [value]:expr
723 | {call_reassign} expr id [args]:exprs assign_op [value]:expr
724 | {super} qualified? kwsuper [args]:exprs
725 | {init} expr kwinit [args]:exprs
726 | {bra} expr [args]:exprs [closure_defs]:closure_def*
727 | {bra_assign} expr [args]:exprs assign [value]:expr
728 | {bra_reassign} expr [args]:exprs assign_op [value]:expr
729 | {closure_call} id [args]:exprs [closure_defs]:closure_def*
731 | {var_assign} id assign [value]:expr
732 | {var_reassign} id assign_op [value]:expr
733 | {range} expr [expr2]:expr
734 | {crange} obra expr [expr2]:expr cbra
735 | {orange} obra expr [expr2]:expr [cbra]:obra
736 | {array} [exprs]:exprs
746 | {start_string} [string]:start_string
747 | {mid_string} [string]:mid_string
748 | {end_string} [string]:end_string
749 | {superstring} [exprs]:expr*
750 | {par} opar expr cpar
751 | {as_cast} expr kwas opar type cpar
752 | {as_notnull} expr kwas opar kwnot kwnull cpar
753 | {isset_attr} kwisset expr [id]:attrid
756 = {list} [exprs]:expr*
757 | {par} opar [exprs]:expr* cpar
758 | {bra} obra [exprs]:expr* cbra
766 = bang [id]:closure_id [ids]:id* kwdo? expr? label?
773 module_name = quad? [path]:id* id;
774 extern_calls = kwimport [extern_calls]:extern_call*
778 | {local_prop} methid
779 | {full_prop} classid quad? methid
780 | {init_prop} classid
781 | {cast_as} [from_type]:type kwas [to_type]:type
782 | {as_nullable} type kwas kwnullable
783 | {as_not_nullable} type kwas kwnot kwnullable
786 qualified = id* classid? ;
790 /*****************************************************************************/