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 - [['"' + '{'] + '\']]
47 extern_code_body = extern_code_char*;
49 eol_helper = cr lf | cr | lf; // This takes care of different platforms
51 /*****************************************************************************/
53 /*****************************************************************************/
57 /*****************************************************************************/
59 /*****************************************************************************/
64 comment = '#' any* eol_helper?;
66 kwmodule = 'package'|'module';
69 kwabstract = 'abstract';
70 kwinterface = 'interface';
71 kwenum = 'universal'|'enum';
79 kwreadable = 'readable';
80 kwwritable = 'writable';
84 kwprotected = 'protected';
85 kwprivate = 'private';
86 kwintrude = 'intrude';
98 kwcontinue = 'continue';
111 kwnullable = 'nullable';
114 kwdebug = '__debug__';
145 classid = uppercase letter*;
146 id = lowercase letter*;
147 attrid = '_' lowercase letter*;
150 float = digit* '.' digit+;
151 char = (''' [[any - '''] - '\'] ''') | (''' '\' any ''');
152 string = '"' str_body '"';
153 start_string = '"' str_body '{';
154 mid_string = '}' str_body '{';
155 end_string = '}' str_body '"';
156 bad_char = ''' '\'? any;
157 bad_string = ('"'|'}') str_body;
159 extern_code_segment = '`' '{' extern_code_body '`' '}';
161 /*****************************************************************************/
163 /*****************************************************************************/
167 /*****************************************************************************/
169 /*****************************************************************************/
171 /* MODULES *******************************************************************/
173 = moduledecl? [imports]:import* [extern_bodies]:extern_code_body* [classdefs]:classdef* implicit_top_class? implicit_main_class? {-> New module(moduledecl, [imports.import], [extern_bodies.extern_code_block], [classdefs.classdef,implicit_top_class.classdef,implicit_main_class.classdef])};
176 = [doc]:no kwmodule no module_name [n2]:n1 {-> New moduledecl(doc.doc, kwmodule, module_name)};
179 = {std} [doc]:no visibility kwimport no module_name [n2]:n1 {-> New import.std(visibility, kwimport, module_name)}
180 | {no} [doc]:no visibility kwimport no kwend [n2]:n1 {-> New import.no(visibility, kwimport, kwend)}
183 implicit_top_class {-> classdef}
184 = propdefs_toplevel+ {-> New classdef.top([propdefs_toplevel.propdef])};
186 implicit_main_class {-> classdef?}
187 = implicit_main_meth {-> New classdef.main([implicit_main_meth.propdef])}
190 implicit_main_meth {-> propdef}
191 = [doc]:no stmts {-> New propdef.main_meth(Null, stmts.expr)}
192 | {n} [doc]:no stmtsn {-> New propdef.main_meth(Null, stmtsn.expr)}
195 /* CLASSES *******************************************************************/
197 = [doc]:no redef visibility classkind no classid formaldefs? extern_code_block? [superclasses]:superclass* propdefs* [n2]:no kwend {-> New classdef.std(doc.doc, redef.kwredef, visibility, classkind, classid, [formaldefs.formaldef], extern_code_block, [superclasses.superclass], [propdefs.propdef], kwend)};
199 = kwredef? {-> kwredef};
202 | {abstract} kwabstract kwclass
203 | {interface} kwinterface
208 formaldefs {-> formaldef*}
209 = obra no formaldef formaldefs_tail* [n2]:no cbra {-> [formaldef, formaldefs_tail.formaldef]};
210 formaldefs_tail {-> formaldef}
211 = comma no formaldef {-> formaldef};
213 = classid typing? {-> New formaldef(classid, typing.type)};
215 superclass {-> superclass}
216 = {super} no kwsuper [n2]:no type {-> New superclass(kwsuper, type)}
219 propdefs~toplevel {-> propdef}
220 = propdef~toplevel n1 {-> propdef~toplevel.propdef}
222 propdef~toplevel {-> propdef}
223 = {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)}
224 | {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)}
225 !toplevel| {deferred} [doc]:no redef visibility kwmeth methid signature kwis kwabstract {-> New propdef.deferred_meth(doc.doc, redef.kwredef, visibility, kwmeth, methid, signature.signature)}
226 !toplevel| {intern} [doc]:no redef visibility kwmeth methid signature kwis kwintern {-> New propdef.intern_meth(doc.doc, redef.kwredef, visibility, kwmeth, methid, signature.signature)}
227 | {extern} [doc]:no redef visibility kwmeth methid signature kwis kwextern string? extern_calls? extern_code_block? {-> New propdef.extern_meth(doc.doc, redef.kwredef, visibility, kwmeth, methid, signature.signature, string, extern_calls, extern_code_block)}
228 | {extern_implicit} [doc]:no redef visibility kwmeth methid signature extern_calls? extern_code_block {-> New propdef.extern_meth(doc.doc, redef.kwredef, visibility, kwmeth, methid, signature.signature, Null, extern_calls, extern_code_block)}
229 !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)}
230 !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)}
231 !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)}
232 !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)}
233 !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)}
234 !toplevel| {type} [doc]:no redef visibility kwtype classid typing {-> New propdef.type(doc.doc, redef.kwredef, visibility, kwtype, classid, typing.type)}
235 !toplevel| {extern_init} [doc]:no redef visibility kwnew methid? signature kwis kwextern string? extern_calls? extern_code_block? {-> New propdef.extern_init(doc.doc, redef.kwredef, visibility, kwnew, methid, signature, string, extern_calls, extern_code_block)}
236 !toplevel| {extern_init_implicit} [doc]:no redef visibility kwnew methid? signature string? extern_calls? extern_code_block {-> New propdef.extern_init(doc.doc, redef.kwredef, visibility, kwnew, methid, signature, string, extern_calls, extern_code_block)}
239 = redef kwreadable {-> New able.read(redef.kwredef, kwreadable)}
242 = redef kwwritable {-> New able.write(redef.kwredef, Null, kwwritable)}
245 = redef visibility kwwritable {-> New able.write(redef.kwredef, visibility, kwwritable)}
249 = {public} {-> New visibility.public()}
250 | {private} kwprivate no {-> New visibility.private(kwprivate)}
251 | {protected} kwprotected no {-> New visibility.protected(kwprotected)}
252 | {intrude} kwintrude no {-> New visibility.intrude(kwintrude)}
256 = {id} id {-> New methid.id(id)}
257 | {plus} plus {-> New methid.plus(plus)}
258 | {minus} minus {-> New methid.minus(minus)}
259 | {star} star {-> New methid.star(star)}
260 | {slash} slash {-> New methid.slash(slash)}
261 | {percent} percent {-> New methid.percent(percent)}
262 | {eq} eq {-> New methid.eq(eq)}
263 | {ne} ne {-> New methid.ne(ne)}
264 | {le} le {-> New methid.le(le)}
265 | {ge} ge {-> New methid.ge(ge)}
266 | {lt} lt {-> New methid.lt(lt)}
267 | {gt} gt {-> New methid.gt(gt)}
268 | {ll} ll {-> New methid.ll(ll)}
269 | {gg} gg {-> New methid.gg(gg)}
270 | {bra} obra cbra {-> New methid.bra(obra, cbra)}
271 | {starship} starship {-> New methid.starship(starship)}
272 | {assign} id assign {-> New methid.assign(id, assign)}
273 | {braassign} obra cbra assign {-> New methid.braassign(obra, cbra, assign)}
276 signature~withret {-> signature}
277 = opar no params? cpar typing [no2]:no closure_decls? {-> New signature(opar, [params.param], cpar, typing.type, [closure_decls.closure_decl])}
278 !withret| {noret} opar no params? cpar [no2]:no closure_decls? {-> New signature(opar, [params.param], cpar, Null, [closure_decls.closure_decl])}
279 | {nopar} typing no closure_decls? {-> New signature(Null, [], Null, typing.type, [closure_decls.closure_decl])}
280 !withret| {noparnoret} no closure_decls? {-> New signature(Null, [], Null, Null, [closure_decls.closure_decl])}
283 signature_noclosures {-> signature}
284 = opar no params? cpar typing? {-> New signature(opar, [params.param], cpar, typing.type, [])}
285 | {nopar} typing? {-> New signature(Null, [], Null, typing.type, [])}
289 = param params_tail* [n2]:no {-> [param, params_tail.param] }
291 params_tail {-> param}
292 = comma no param {-> param};
294 = {untyped} id {-> New param(id, Null, Null)}
295 | id typing dotdotdot? {-> New param(id, typing.type, dotdotdot)}
298 closure_decls {->closure_decl*}
299 = closure_decl+ {-> [closure_decl]};
301 = kwbreak? bang id signature_noclosures n {-> New closure_decl(kwbreak, bang, id, signature_noclosures.signature, Null)}
302 | {optionnal} kwbreak? bang id signature_noclosures kwdo stmtso n {-> New closure_decl(kwbreak, bang, id, signature_noclosures.signature, stmtso.expr)}
303 | {assign} kwbreak? bang id signature_noclosures assign no assign_continue n {-> New closure_decl(kwbreak, bang, id, signature_noclosures.signature, assign_continue.expr)}
306 assign_return{-> expr}
307 = expr_final {-> New expr.return(Null, expr_final.expr)}
310 extern_calls {-> extern_calls}
311 = kwimport no extern_call extern_call_tail* {-> New extern_calls( kwimport, [extern_call, extern_call_tail.extern_call] )}
313 extern_call_tail {-> extern_call}
314 = comma no extern_call {-> extern_call};
315 extern_call {-> extern_call}
316 = {prop} extern_call_prop {-> extern_call_prop.extern_call}
317 | {cast} extern_call_cast {-> extern_call_cast.extern_call}
318 | {super} kwsuper {-> New extern_call.super( kwsuper )}
320 extern_call_prop {-> extern_call}
321 = {local} methid {-> New extern_call.local_prop( methid )}
322 | {full} classid quad methid {-> New extern_call.full_prop( classid, quad, methid )}
323 | {init} classid {-> New extern_call.init_prop( classid )}
325 extern_call_cast {-> extern_call}
326 = {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)}
327 | {as_nullable} type kwas [n2]:no kwnullable {-> New extern_call.as_nullable( type, kwas, kwnullable)}
328 | {as_not_nullable} type kwas [n2]:no kwnot [n3]:no kwnullable {-> New extern_call.as_not_nullable( type, kwas, kwnot, kwnullable)}
331 in_language = kwin string;
332 extern_code_block = in_language? extern_code_segment;
333 extern_code_body {-> extern_code_block} = no extern_code_block {-> extern_code_block};
335 /* TYPES *********************************************************************/
337 = {simple} kwnullable? classid {-> New type(kwnullable, classid, [])}
338 !nobra | {generic} kwnullable? classid obra no types [n2]:no cbra {-> New type(kwnullable, classid, [types.type])}
341 = type types_tail* {-> [type, types_tail.type]};
343 = comma no type {-> type};
345 = column no type {-> type};
347 /* STATMENTS *****************************************************************/
348 stmtso~withelse~withend {-> expr?}
349 = {block} n stmtsnend {-> stmtsnend.expr}
350 | {emptyblock} n kwend {-> New expr.block([], kwend)}
351 | {emptyoneline} kwend {-> New expr.block([], kwend)}
352 !withend| {oneline} stmt~withelse {-> stmt~withelse.expr}
355 = stmt stmts_tail* {-> New expr.block([stmt.expr, stmts_tail.expr], Null)};
357 = stmt stmts_tail* n {-> New expr.block([stmt.expr, stmts_tail.expr], Null)};
359 = stmt stmts_tail* n kwend {-> New expr.block([stmt.expr, stmts_tail.expr], kwend)};
361 = n stmt {-> stmt.expr};
362 stmt~withelse {-> expr}
363 = {vardecl} vardecl~withelse {-> vardecl~withelse.expr}
364 | {assign} assignment~withelse {-> assignment~withelse.expr}
365 | {return} kwreturn expr_final~withelse? {-> New expr.return(kwreturn, expr_final~withelse.expr)}
366 | {break} kwbreak label? expr_final~withelse? {-> New expr.break(kwbreak, label, expr_final~withelse.expr)}
367 | {abort} kwabort {-> New expr.abort(kwabort)}
368 | {continue} kwcontinue label? expr_final~withelse? {-> New expr.continue(kwcontinue, label, expr_final~withelse.expr)}
369 | {do} do~withelse {-> do~withelse.expr}
370 | {if} if~withelse {-> if~withelse.expr}
371 | {while} while~withelse {-> while~withelse.expr}
372 | {loop} loop~withelse {-> loop~withelse.expr}
373 | {for} for~withelse {-> for~withelse.expr}
374 | {assert} assert~withelse {-> assert~withelse.expr}
375 | {call} recv id args_nopar closure_defs~withelse? {-> New expr.call(recv.expr, id, args_nopar.exprs, [closure_defs~withelse.closure_def])}
376 | {super} qualified? kwsuper args_nopar {-> New expr.super(qualified, kwsuper, args_nopar.exprs)}
377 | {init} recv kwinit args_nopar {-> New expr.init(recv.expr, kwinit, args_nopar.exprs)}
378 | {debug_type_is} kwdebug kwtype type column expr_final~withelse {-> New expr.debug_type(kwdebug, kwtype, expr_final~withelse.expr, type) }
383 closure_defs~withelse {-> closure_def*}
384 = {one} closure_def_last~withelse {-> [closure_def_last~withelse.closure_def]}
385 | closure_def closure_defs~withelse {-> [closure_def, closure_defs~withelse.closure_def]}
388 closure_def_last~withelse {-> closure_def}
389 = bang [id]:closure_id idlist? kwdo stmtso_withend label {-> New closure_def(bang, id, [idlist.id], kwdo, stmtso_withend.expr, label)}
390 | {nolabel} bang [id]:closure_id idlist? kwdo stmtso~withelse {-> New closure_def(bang, id, [idlist.id], kwdo, stmtso~withelse.expr, Null)}
391 | {assign} bang [id]:closure_id idlist? assign no assign_continue~withelse {-> New closure_def(bang, id, [idlist.id], Null, assign_continue~withelse.expr, Null)}
394 closure_def {-> closure_def}
395 = bang [id]:closure_id idlist? kwdo n stmtsn {-> New closure_def(bang, id, [idlist.id], kwdo, stmtsn.expr, Null)}
396 | {empty} bang [id]:closure_id idlist? kwdo n {-> New closure_def(bang, id, [idlist.id], kwdo, Null, Null)}
403 assign_continue~withelse{-> expr}
404 = expr_final~withelse {-> New expr.continue(Null, Null, expr_final~withelse.expr)}
407 vardecl~withelse{-> expr}
408 = kwvar id typing? {-> New expr.vardecl(kwvar, id, typing.type, Null, Null)}
409 | {assign} kwvar id typing? assign no expr_final~withelse {-> New expr.vardecl(kwvar, id, typing.type, assign, expr_final~withelse.expr)}
412 assignment~withelse {-> expr}
413 = {attr} recv attrid assign expr_final~withelse {-> New expr.attr_assign(recv.expr, attrid, assign, expr_final~withelse.expr)}
414 | {call} recv id args assign expr_final~withelse {-> New expr.call_assign(recv.expr, id, args.exprs, assign, expr_final~withelse.expr)}
415 | {bra} expr_atom braargs assign expr_final~withelse {-> New expr.bra_assign(expr_atom.expr, braargs.exprs, assign, expr_final~withelse.expr)}
416 | {attr_re} recv attrid assign_op expr_final~withelse {-> New expr.attr_reassign(recv.expr, attrid, assign_op, expr_final~withelse.expr)}
417 | {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)}
418 | {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)}
425 do~withelse {-> expr}
426 = kwdo stmtso_withend label {-> New expr.do(kwdo, stmtso_withend.expr, label)}
427 | {nolabel} kwdo stmtso~withelse {-> New expr.do(kwdo, stmtso~withelse.expr, Null)}
430 if~withelse {-> expr}
431 = {onelineelse} kwif no expr [n2]:no kwthen stmt_withelse kwelse stmtso~withelse {-> New expr.if(kwif, expr, stmt_withelse.expr, stmtso~withelse.expr)}
432 !withelse | {oneline} kwif no expr [n2]:no kwthen stmt {-> New expr.if(kwif, expr, stmt.expr, Null)}
433 !withelse | {block} kwif no expr [n2]:no kwthen [n3]:n stmtsn elsepartblock {-> New expr.if(kwif, expr, stmtsn.expr, elsepartblock.expr)}
434 !withelse | {emptyblock} kwif no expr [n2]:no kwthen [n3]:n? elsepartblock {-> New expr.if(kwif, expr, Null, elsepartblock.expr)}
436 elsepartblock {-> expr?}
437 = {else} kwelse stmtso {-> stmtso.expr}
438 | {empty} kwend {-> New expr.block([], kwend)}
441 loop~withelse {-> expr}
442 = kwloop stmtso_withend label {-> New expr.loop(kwloop, stmtso_withend.expr, label)}
443 | {nolabel} kwloop stmtso~withelse {-> New expr.loop(kwloop, stmtso~withelse.expr, Null)}
446 while~withelse {-> expr}
447 = kwwhile no expr [n2]:no kwdo stmtso_withend label {-> New expr.while(kwwhile, expr, kwdo, stmtso_withend.expr, label)}
448 | {nolabel} kwwhile no expr [n2]:no kwdo stmtso~withelse {-> New expr.while(kwwhile, expr, kwdo, stmtso~withelse.expr, Null)}
451 for~withelse {-> expr}
452 = 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)}
453 | {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)}
456 assert~withelse {-> expr}
457 = {else} kwassert assertid? expr_final_withelse kwelse stmtso~withelse {-> New expr.assert(kwassert, assertid.id, expr_final_withelse.expr, stmtso~withelse.expr)}
458 !withelse| {noelse} kwassert assertid? expr_final {-> New expr.assert(kwassert, assertid.id, expr_final.expr, Null)}
463 /* EXPRESSIONS ***************************************************************/
464 expr_final~nopar~withelse~nobra {-> expr}
465 = expr~nopar~nobra {-> expr~nopar~nobra.expr}
466 | {closure_call} recv~nobra id args closure_defs~withelse {-> New expr.call(recv~nobra.expr, id, args.exprs, [closure_defs~withelse.closure_def])}
467 !nobra!nopar | {closure_bra} expr_atom braargs closure_defs~withelse {-> New expr.bra(expr_atom.expr, braargs.exprs, [closure_defs~withelse.closure_def])}
470 expr~nopar~nobra {-> expr}
471 = expr_and~nopar~nobra {-> expr_and~nopar~nobra.expr}
472 | {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)}
475 expr_and~nopar~nobra {-> expr}
476 = expr_not~nopar~nobra {-> expr_not~nopar~nobra.expr}
477 | {or} expr_and~nopar~nobra kwor no expr_not~nopar~nobra {-> New expr.or(expr_and~nopar~nobra.expr, expr_not~nopar~nobra.expr)}
478 | {and} expr_and~nopar~nobra kwand no expr_not~nopar~nobra {-> New expr.and(expr_and~nopar~nobra.expr, expr_not~nopar~nobra.expr)}
479 | {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)}
482 expr_not~nopar~nobra {-> expr}
483 = expr_eq~nopar~nobra {-> expr_eq~nopar~nobra.expr}
484 | {not} kwnot no expr_not~nopar~nobra {-> New expr.not(kwnot, expr_not~nopar~nobra.expr)}
487 expr_eq~nopar~nobra {-> expr}
488 = expr_add~nopar~nobra {-> expr_add~nopar~nobra.expr}
489 | {eq} expr_add~nopar~nobra eq no [expr2]:expr_add~nopar~nobra {-> New expr.eq(expr_add~nopar~nobra.expr, expr2.expr)}
490 | {ee} expr_add~nopar~nobra kwis no [expr2]:expr_add~nopar~nobra {-> New expr.ee(expr_add~nopar~nobra.expr, expr2.expr)}
491 | {ne} expr_add~nopar~nobra ne no [expr2]:expr_add~nopar~nobra {-> New expr.ne(expr_add~nopar~nobra.expr, expr2.expr)}
492 | {lt} expr_add~nopar~nobra lt no [expr2]:expr_add~nopar~nobra {-> New expr.lt(expr_add~nopar~nobra.expr, expr2.expr)}
493 | {le} expr_add~nopar~nobra le no [expr2]:expr_add~nopar~nobra {-> New expr.le(expr_add~nopar~nobra.expr, expr2.expr)}
494 | {ll} expr_eq~nopar~nobra ll no [expr2]:expr_add~nopar~nobra {-> New expr.ll(expr_eq~nopar~nobra.expr, expr2.expr)}
495 | {gt} expr_add~nopar~nobra gt no [expr2]:expr_add~nopar~nobra {-> New expr.gt(expr_add~nopar~nobra.expr, expr2.expr)}
496 | {ge} expr_add~nopar~nobra ge no [expr2]:expr_add~nopar~nobra {-> New expr.ge(expr_add~nopar~nobra.expr, expr2.expr)}
497 | {gg} expr_eq~nopar~nobra gg no [expr2]:expr_add~nopar~nobra {-> New expr.gg(expr_eq~nopar~nobra.expr, expr2.expr)}
498 | {starship} expr_add~nopar~nobra starship no [expr2]:expr_add~nopar~nobra {-> New expr.starship(expr_add~nopar~nobra.expr, expr2.expr)}
499 | {isa} expr_add~nopar~nobra kwisa no type~nobra {-> New expr.isa(expr_add~nopar~nobra.expr, type~nobra.type)}
502 expr_add~nopar~nobra {-> expr}
503 = expr_mul~nopar~nobra {-> expr_mul~nopar~nobra.expr}
504 | {plus} expr_add~nopar~nobra plus no [expr2]:expr_mul~nopar~nobra {-> New expr.plus(expr_add~nopar~nobra.expr, expr2.expr)}
505 | {minus} expr_add~nopar~nobra minus no [expr2]:expr_mul~nopar~nobra {-> New expr.minus(expr_add~nopar~nobra.expr, expr2.expr)}
508 expr_mul~nopar~nobra {-> expr}
509 = expr_minus~nopar~nobra {-> expr_minus~nopar~nobra.expr}
510 | {star} expr_mul~nopar~nobra star no [expr2]:expr_minus~nopar~nobra {-> New expr.star(expr_mul~nopar~nobra.expr, expr2.expr)}
511 | {slash} expr_mul~nopar~nobra slash no [expr2]:expr_minus~nopar~nobra {-> New expr.slash(expr_mul~nopar~nobra.expr, expr2.expr)}
512 | {percent} expr_mul~nopar~nobra percent no [expr2]:expr_minus~nopar~nobra {-> New expr.percent(expr_mul~nopar~nobra.expr, expr2.expr)}
515 expr_minus~nopar~nobra {-> expr}
516 = expr_new~nopar~nobra {-> expr_new~nopar~nobra.expr}
517 | {minus} minus no expr_minus~nopar~nobra {-> New expr.uminus(minus, expr_minus~nopar~nobra.expr)}
518 | {once} kwonce no expr_minus~nopar~nobra {-> New expr.once(kwonce, expr_minus~nopar~nobra.expr)}
521 expr_new~nopar~nobra {-> expr}
522 = expr_atom~nopar~nobra {-> expr_atom~nopar~nobra.expr}
523 | {new} kwnew no type~nobra args {-> New expr.new(kwnew, type~nobra.type, Null, args.exprs)}
524 | {isset_attr} kwisset recv~nopar~nobra attrid {-> New expr.isset_attr(kwisset, recv~nopar~nobra.expr, attrid)}
527 expr_atom~nopar~nobra {-> expr}
528 = {attr} recv~nopar~nobra attrid {-> New expr.attr(recv~nopar~nobra.expr, attrid)}
529 | {call} recv~nopar~nobra id args {-> New expr.call(recv~nopar~nobra.expr, id, args.exprs, [])}
530 | {super} qualified? kwsuper args {-> New expr.super(qualified, kwsuper, args.exprs)}
531 | {init} recv~nopar~nobra kwinit args {-> New expr.init(recv~nopar~nobra.expr, kwinit, args.exprs)}
532 !nobra | {bra} expr_atom~nopar braargs {-> New expr.bra(expr_atom~nopar.expr, braargs.exprs, [])}
533 | {new} kwnew no type~nobra dot [n2]:no id args {-> New expr.new(kwnew, type~nobra.type, id, args.exprs)}
534 // !nopar to unambiguise 'foo[5].bar' between '(foo[5]).bar' and 'foo([5].bar),
535 !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)}
536 !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)}
537 !nobra!nopar | {array} braargs {-> New expr.array(braargs.exprs)}
538 | {self} kwself {-> New expr.self(kwself)}
539 | {true} kwtrue {-> New expr.true(kwtrue)}
540 | {false} kwfalse {-> New expr.false(kwfalse)}
541 | {null} kwnull {-> New expr.null(kwnull)}
542 | {int} number {-> New expr.int(number)}
543 | {float} float {-> New expr.float(float)}
544 | {char} char {-> New expr.char(char)}
545 | {string} string {-> New expr.string(string)}
546 | {superstring} superstring {-> superstring.expr}
547 !nopar | {par} opar expr cpar {-> New expr.par(opar, expr, cpar)}
548 | {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)}
549 | {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)}
552 superstring {-> expr}
553 = superstring_start superstring_middle* superstring_end {-> New expr.superstring([superstring_start.expr, superstring_middle.expr, superstring_end.expr])};
554 superstring_start {-> expr*}
555 = start_string_p no expr [n2]:no {-> [start_string_p.expr, expr]};
556 start_string_p {-> expr}
557 = start_string {-> New expr.start_string(start_string)};
558 superstring_middle {-> expr*}
559 = mid_string_p no expr [n2]:no {-> [mid_string_p.expr, expr]};
560 mid_string_p {-> expr}
561 = mid_string {-> New expr.mid_string(mid_string)};
562 superstring_end {-> expr}
563 = end_string {-> New expr.end_string(end_string)};
565 /* MISC **********************************************************************/
567 recv~nopar~nobra {-> expr}
568 = expr_atom~nopar~nobra dot no {-> expr_atom~nopar~nobra.expr}
569 | {implicit} {-> New expr.implicit_self()}
573 = opar no expr_list cpar {-> New exprs.par(opar, [expr_list.expr], cpar) }
574 | {emptypar} opar no cpar {-> New exprs.par(opar, [], cpar) }
575 | {empty} {-> New exprs.list([])}
577 args_nopar {-> exprs}
578 = opar no expr_list cpar {-> New exprs.par(opar, [expr_list.expr], cpar) }
579 | {onearg} expr_nopar {-> New exprs.list([expr_nopar.expr])}
580 | {emptypar} opar no cpar {-> New exprs.par(opar, [], cpar) }
581 | {empty} {-> New exprs.list([])}
584 = obra no expr_list cbra {-> New exprs.bra(obra, [expr_list.expr], cbra)};
586 = expr [n2]:no expr_tail* {-> [expr, expr_tail.expr]};
588 = comma no expr [n2]:no {-> expr};
590 = opar idlist_nopar cpar {-> [idlist_nopar.id]}
591 | {nopar} idlist_nopar {-> [idlist_nopar.id]}
593 idlist_nopar {-> id*}
594 = {single} id {-> [id]}
595 | {more} idlist_nopar no comma [n2]:no id {-> [idlist_nopar.id, id]}
598 module_name {-> module_name}
599 = {mod} modquad* id {-> New module_name(Null, [modquad.id], id)}
600 | {root} quad no modquad* id {-> New module_name(quad, [modquad.id], id)}
604 = {cla} modquad* classquad {-> New qualified([modquad.id], classquad.classid)}
605 | {mod} modquad+ {-> New qualified([modquad.id], Null)}
608 = id quad no {-> id};
609 classquad {-> classid}
610 = classid quad no {-> classid};
612 n1 = {a} comment | {b} eol;
614 = {a} n2? comment+ {-> New doc([comment])}
623 = {a} n2? comment+ eol+
627 /*****************************************************************************/
629 /*****************************************************************************/
631 module = moduledecl? [imports]:import* [extern_code_blocks]:extern_code_block* [classdefs]:classdef*;
634 = doc? kwmodule [name]:module_name;
636 import = {std} visibility kwimport [name]:module_name
637 | {no} visibility kwimport kwend
642 | {private} kwprivate
643 | {protected} kwprotected
644 | {intrude} kwintrude
647 classdef= {std} doc? kwredef? visibility classkind [id]:classid? [formaldefs]:formaldef* extern_code_block? [superclasses]:superclass* [propdefs]:propdef* kwend
648 | {top} [propdefs]:propdef*
649 | {main} [propdefs]:propdef*
653 | {abstract} kwabstract kwclass
654 | {interface} kwinterface
658 formaldef = [id]:classid type?;
659 superclass = kwsuper type;
662 propdef = {attr} doc? [readable]:able? [writable]:able? kwredef? visibility kwvar [id]:attrid? [id2]:id? type? expr?
663 | {meth} doc? kwredef? visibility methid signature
664 | {deferred_meth} doc? kwredef? visibility kwmeth methid signature
665 | {intern_meth} doc? kwredef? visibility kwmeth methid signature
666 | {extern_meth} doc? kwredef? visibility kwmeth methid signature [extern]:string? extern_calls? extern_code_block?
667 | {concrete_meth} doc? kwredef? visibility kwmeth methid signature [block]:expr?
668 | {concrete_init} doc? kwredef? visibility kwinit methid? signature [block]:expr?
669 | {extern_init} doc? kwredef? visibility kwnew methid? signature [extern]:string? extern_calls? extern_code_block?
670 | {main_meth} kwredef? [block]:expr?
671 | {type} doc? kwredef? visibility kwtype [id]:classid type
674 able = {read} kwredef? kwreadable
675 | {write} kwredef? visibility? kwwritable
678 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;
680 signature = opar? [params]:param* cpar? type? [closure_decls]:closure_decl*;
682 param = id type? dotdotdot?
685 closure_decl = kwbreak? bang id signature expr?
688 type = kwnullable? [id]:classid [types]:type*;
692 expr = {block} expr* kwend?
693 | {vardecl} kwvar id type? assign? expr?
694 | {return} kwreturn? expr?
695 | {break} kwbreak label? expr?
697 | {continue} kwcontinue? label? expr?
698 | {do} kwdo [block]:expr? label?
699 | {if} kwif expr [then]:expr? [else]:expr?
700 | {ifexpr} kwif expr kwthen [then]:expr kwelse [else]:expr
701 | {while} kwwhile expr kwdo [block]:expr? label?
702 | {loop} kwloop [block]:expr? label?
703 | {for} kwfor [ids]:id* expr kwdo [block]:expr? label?
704 | {assert} kwassert id? expr [else]:expr?
707 | {binop} expr [expr2]:expr
708 | {or} expr [expr2]:expr
709 | {and} expr [expr2]:expr
710 | {or_else} expr [expr2]:expr
712 | {eq} expr [expr2]:expr
713 | {ee} expr [expr2]:expr
714 | {ne} expr [expr2]:expr
715 | {lt} expr [expr2]:expr
716 | {le} expr [expr2]:expr
717 | {ll} expr [expr2]:expr
718 | {gt} expr [expr2]:expr
719 | {ge} expr [expr2]:expr
720 | {gg} expr [expr2]:expr
722 | {plus} expr [expr2]:expr
723 | {minus} expr [expr2]:expr
724 | {starship} expr [expr2]:expr
725 | {star} expr [expr2]:expr
726 | {slash} expr [expr2]:expr
727 | {percent} expr [expr2]:expr
728 | {uminus} minus expr
729 | {new} kwnew type id? [args]:exprs
730 | {attr} expr [id]:attrid
731 | {attr_assign} expr [id]:attrid assign [value]:expr
732 | {attr_reassign} expr [id]:attrid assign_op [value]:expr
733 | {call} expr id [args]:exprs [closure_defs]:closure_def*
734 | {call_assign} expr id [args]:exprs assign [value]:expr
735 | {call_reassign} expr id [args]:exprs assign_op [value]:expr
736 | {super} qualified? kwsuper [args]:exprs
737 | {init} expr kwinit [args]:exprs
738 | {bra} expr [args]:exprs [closure_defs]:closure_def*
739 | {bra_assign} expr [args]:exprs assign [value]:expr
740 | {bra_reassign} expr [args]:exprs assign_op [value]:expr
741 | {closure_call} id [args]:exprs [closure_defs]:closure_def*
743 | {var_assign} id assign [value]:expr
744 | {var_reassign} id assign_op [value]:expr
745 | {range} expr [expr2]:expr
746 | {crange} obra expr [expr2]:expr cbra
747 | {orange} obra expr [expr2]:expr [cbra]:obra
748 | {array} [exprs]:exprs
758 | {start_string} [string]:start_string
759 | {mid_string} [string]:mid_string
760 | {end_string} [string]:end_string
761 | {superstring} [exprs]:expr*
762 | {par} opar expr cpar
763 | {as_cast} expr kwas opar type cpar
764 | {as_notnull} expr kwas opar kwnot kwnull cpar
765 | {isset_attr} kwisset expr [id]:attrid
766 | {debug_type} kwdebug kwtype expr type
769 = {list} [exprs]:expr*
770 | {par} opar [exprs]:expr* cpar
771 | {bra} obra [exprs]:expr* cbra
779 = bang [id]:closure_id [ids]:id* kwdo? expr? label?
786 module_name = quad? [path]:id* id;
787 extern_calls = kwimport [extern_calls]:extern_call*
791 | {local_prop} methid
792 | {full_prop} classid quad? methid
793 | {init_prop} classid
794 | {cast_as} [from_type]:type kwas [to_type]:type
795 | {as_nullable} type kwas kwnullable
796 | {as_not_nullable} type kwas kwnot kwnullable
798 in_language = kwin string;
799 extern_code_block = in_language? extern_code_segment;
801 qualified = id* classid? ;
805 /*****************************************************************************/