1 | //===-- lib/Parser/io-parsers.cpp -----------------------------------------===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | |
9 | // Per-type parsers for I/O statements and FORMAT |
10 | |
11 | #include "basic-parsers.h" |
12 | #include "expr-parsers.h" |
13 | #include "misc-parsers.h" |
14 | #include "stmt-parser.h" |
15 | #include "token-parsers.h" |
16 | #include "type-parser-implementation.h" |
17 | #include "flang/Parser/characters.h" |
18 | #include "flang/Parser/parse-tree.h" |
19 | |
20 | namespace Fortran::parser { |
21 | // R1201 io-unit -> file-unit-number | * | internal-file-variable |
22 | // R1203 internal-file-variable -> char-variable |
23 | // R905 char-variable -> variable |
24 | // "char-variable" is attempted first since it's not type constrained but |
25 | // syntactically ambiguous with "file-unit-number", which is constrained. |
26 | // Note, "file-unit-number" is replaced by "expr" to allow for better |
27 | // error messages. |
28 | TYPE_PARSER(construct<IoUnit>(variable / lookAhead(space / ",);\n"_ch )) || |
29 | construct<IoUnit>( |
30 | indirect(expr) / (lookAhead(space >> ",)"_ch ) || atEndOfStmt)) || |
31 | construct<IoUnit>(star)) |
32 | |
33 | // R1202 file-unit-number -> scalar-int-expr |
34 | TYPE_PARSER(construct<FileUnitNumber>( |
35 | scalarIntExpr / (lookAhead(space >> ",)"_ch ) || atEndOfStmt))) |
36 | |
37 | // R1204 open-stmt -> OPEN ( connect-spec-list ) |
38 | TYPE_CONTEXT_PARSER("OPEN statement"_en_US , |
39 | construct<OpenStmt>( |
40 | "OPEN (" >> nonemptyList("expected connection specifications"_err_en_US , |
41 | Parser<ConnectSpec>{}) / |
42 | ")" )) |
43 | |
44 | // R1206 file-name-expr -> scalar-default-char-expr |
45 | constexpr auto fileNameExpr{scalarDefaultCharExpr}; |
46 | |
47 | // R1205 connect-spec -> |
48 | // [UNIT =] file-unit-number | ACCESS = scalar-default-char-expr | |
49 | // ACTION = scalar-default-char-expr | |
50 | // ASYNCHRONOUS = scalar-default-char-expr | |
51 | // BLANK = scalar-default-char-expr | |
52 | // DECIMAL = scalar-default-char-expr | |
53 | // DELIM = scalar-default-char-expr | |
54 | // ENCODING = scalar-default-char-expr | ERR = label | |
55 | // FILE = file-name-expr | FORM = scalar-default-char-expr | |
56 | // IOMSG = iomsg-variable | IOSTAT = scalar-int-variable | |
57 | // NEWUNIT = scalar-int-variable | PAD = scalar-default-char-expr | |
58 | // POSITION = scalar-default-char-expr | RECL = scalar-int-expr | |
59 | // ROUND = scalar-default-char-expr | SIGN = scalar-default-char-expr | |
60 | // STATUS = scalar-default-char-expr |
61 | // @ | CARRIAGECONTROL = scalar-default-char-variable |
62 | // | CONVERT = scalar-default-char-variable |
63 | // | DISPOSE = scalar-default-char-variable |
64 | constexpr auto statusExpr{construct<StatusExpr>(scalarDefaultCharExpr)}; |
65 | constexpr auto errLabel{construct<ErrLabel>(label)}; |
66 | |
67 | TYPE_PARSER(first(construct<ConnectSpec>(maybe("UNIT ="_tok ) >> fileUnitNumber), |
68 | construct<ConnectSpec>(construct<ConnectSpec::CharExpr>( |
69 | "ACCESS =" >> pure(ConnectSpec::CharExpr::Kind::Access), |
70 | scalarDefaultCharExpr)), |
71 | construct<ConnectSpec>(construct<ConnectSpec::CharExpr>( |
72 | "ACTION =" >> pure(ConnectSpec::CharExpr::Kind::Action), |
73 | scalarDefaultCharExpr)), |
74 | construct<ConnectSpec>(construct<ConnectSpec::CharExpr>( |
75 | "ASYNCHRONOUS =" >> pure(ConnectSpec::CharExpr::Kind::Asynchronous), |
76 | scalarDefaultCharExpr)), |
77 | construct<ConnectSpec>(construct<ConnectSpec::CharExpr>( |
78 | "BLANK =" >> pure(ConnectSpec::CharExpr::Kind::Blank), |
79 | scalarDefaultCharExpr)), |
80 | construct<ConnectSpec>(construct<ConnectSpec::CharExpr>( |
81 | "DECIMAL =" >> pure(ConnectSpec::CharExpr::Kind::Decimal), |
82 | scalarDefaultCharExpr)), |
83 | construct<ConnectSpec>(construct<ConnectSpec::CharExpr>( |
84 | "DELIM =" >> pure(ConnectSpec::CharExpr::Kind::Delim), |
85 | scalarDefaultCharExpr)), |
86 | construct<ConnectSpec>(construct<ConnectSpec::CharExpr>( |
87 | "ENCODING =" >> pure(ConnectSpec::CharExpr::Kind::Encoding), |
88 | scalarDefaultCharExpr)), |
89 | construct<ConnectSpec>("ERR =" >> errLabel), |
90 | construct<ConnectSpec>("FILE =" >> fileNameExpr), |
91 | extension<LanguageFeature::FileName>( |
92 | "nonstandard usage: NAME= in place of FILE="_port_en_US , |
93 | construct<ConnectSpec>("NAME =" >> fileNameExpr)), |
94 | construct<ConnectSpec>(construct<ConnectSpec::CharExpr>( |
95 | "FORM =" >> pure(ConnectSpec::CharExpr::Kind::Form), |
96 | scalarDefaultCharExpr)), |
97 | construct<ConnectSpec>("IOMSG =" >> msgVariable), |
98 | construct<ConnectSpec>("IOSTAT =" >> statVariable), |
99 | construct<ConnectSpec>(construct<ConnectSpec::Newunit>( |
100 | "NEWUNIT =" >> scalar(integer(variable)))), |
101 | construct<ConnectSpec>(construct<ConnectSpec::CharExpr>( |
102 | "PAD =" >> pure(ConnectSpec::CharExpr::Kind::Pad), |
103 | scalarDefaultCharExpr)), |
104 | construct<ConnectSpec>(construct<ConnectSpec::CharExpr>( |
105 | "POSITION =" >> pure(ConnectSpec::CharExpr::Kind::Position), |
106 | scalarDefaultCharExpr)), |
107 | construct<ConnectSpec>( |
108 | construct<ConnectSpec::Recl>("RECL =" >> scalarIntExpr)), |
109 | construct<ConnectSpec>(construct<ConnectSpec::CharExpr>( |
110 | "ROUND =" >> pure(ConnectSpec::CharExpr::Kind::Round), |
111 | scalarDefaultCharExpr)), |
112 | construct<ConnectSpec>(construct<ConnectSpec::CharExpr>( |
113 | "SIGN =" >> pure(ConnectSpec::CharExpr::Kind::Sign), |
114 | scalarDefaultCharExpr)), |
115 | construct<ConnectSpec>("STATUS =" >> statusExpr), |
116 | extension<LanguageFeature::Carriagecontrol>( |
117 | "nonstandard usage: CARRIAGECONTROL="_port_en_US , |
118 | construct<ConnectSpec>( |
119 | construct<ConnectSpec::CharExpr>("CARRIAGECONTROL =" >> |
120 | pure(ConnectSpec::CharExpr::Kind::Carriagecontrol), |
121 | scalarDefaultCharExpr))), |
122 | extension<LanguageFeature::Convert>( |
123 | "nonstandard usage: CONVERT="_port_en_US , |
124 | construct<ConnectSpec>(construct<ConnectSpec::CharExpr>( |
125 | "CONVERT =" >> pure(ConnectSpec::CharExpr::Kind::Convert), |
126 | scalarDefaultCharExpr))), |
127 | extension<LanguageFeature::Dispose>( |
128 | "nonstandard usage: DISPOSE="_port_en_US , |
129 | construct<ConnectSpec>(construct<ConnectSpec::CharExpr>( |
130 | "DISPOSE =" >> pure(ConnectSpec::CharExpr::Kind::Dispose), |
131 | scalarDefaultCharExpr))))) |
132 | |
133 | // R1209 close-spec -> |
134 | // [UNIT =] file-unit-number | IOSTAT = scalar-int-variable | |
135 | // IOMSG = iomsg-variable | ERR = label | |
136 | // STATUS = scalar-default-char-expr |
137 | constexpr auto closeSpec{first( |
138 | construct<CloseStmt::CloseSpec>(maybe("UNIT ="_tok ) >> fileUnitNumber), |
139 | construct<CloseStmt::CloseSpec>("IOSTAT =" >> statVariable), |
140 | construct<CloseStmt::CloseSpec>("IOMSG =" >> msgVariable), |
141 | construct<CloseStmt::CloseSpec>("ERR =" >> errLabel), |
142 | construct<CloseStmt::CloseSpec>("STATUS =" >> statusExpr))}; |
143 | |
144 | // R1208 close-stmt -> CLOSE ( close-spec-list ) |
145 | TYPE_CONTEXT_PARSER("CLOSE statement"_en_US , |
146 | construct<CloseStmt>("CLOSE" >> parenthesized(nonemptyList(closeSpec)))) |
147 | |
148 | // R1210 read-stmt -> |
149 | // READ ( io-control-spec-list ) [input-item-list] | |
150 | // READ format [, input-item-list] |
151 | // The ambiguous READ(CVAR) is parsed as if CVAR were the unit. |
152 | // As Fortran doesn't have internal unformatted I/O, it should |
153 | // be parsed as if (CVAR) were a format; this is corrected by |
154 | // rewriting in semantics when we know that CVAR is character. |
155 | constexpr auto inputItemList{ |
156 | extension<LanguageFeature::IOListLeadingComma>( |
157 | "nonstandard usage: leading comma in input item list"_port_en_US , |
158 | some("," >> inputItem)) || // legacy extension: leading comma |
159 | optionalList(inputItem)}; |
160 | |
161 | TYPE_CONTEXT_PARSER("READ statement"_en_US , |
162 | construct<ReadStmt>("READ (" >> |
163 | construct<std::optional<IoUnit>>(maybe("UNIT ="_tok ) >> ioUnit), |
164 | "," >> construct<std::optional<Format>>(format), |
165 | defaulted("," >> nonemptyList(ioControlSpec)) / ")" , inputItemList) || |
166 | construct<ReadStmt>( |
167 | "READ (" >> construct<std::optional<IoUnit>>(ioUnit), |
168 | construct<std::optional<Format>>(), |
169 | defaulted("," >> nonemptyList(ioControlSpec)) / ")" , |
170 | inputItemList) || |
171 | construct<ReadStmt>("READ" >> construct<std::optional<IoUnit>>(), |
172 | construct<std::optional<Format>>(), |
173 | parenthesized(nonemptyList(ioControlSpec)), inputItemList) || |
174 | construct<ReadStmt>("READ" >> construct<std::optional<IoUnit>>(), |
175 | construct<std::optional<Format>>(format), |
176 | construct<std::list<IoControlSpec>>(), many("," >> inputItem))) |
177 | |
178 | // R1214 id-variable -> scalar-int-variable |
179 | constexpr auto idVariable{construct<IdVariable>(scalarIntVariable)}; |
180 | |
181 | // R1213 io-control-spec -> |
182 | // [UNIT =] io-unit | [FMT =] format | [NML =] namelist-group-name | |
183 | // ADVANCE = scalar-default-char-expr | |
184 | // ASYNCHRONOUS = scalar-default-char-constant-expr | |
185 | // BLANK = scalar-default-char-expr | |
186 | // DECIMAL = scalar-default-char-expr | |
187 | // DELIM = scalar-default-char-expr | END = label | EOR = label | |
188 | // ERR = label | ID = id-variable | IOMSG = iomsg-variable | |
189 | // IOSTAT = scalar-int-variable | PAD = scalar-default-char-expr | |
190 | // POS = scalar-int-expr | REC = scalar-int-expr | |
191 | // ROUND = scalar-default-char-expr | SIGN = scalar-default-char-expr | |
192 | // SIZE = scalar-int-variable |
193 | constexpr auto endLabel{construct<EndLabel>(label)}; |
194 | constexpr auto eorLabel{construct<EorLabel>(label)}; |
195 | TYPE_PARSER(first(construct<IoControlSpec>("UNIT =" >> ioUnit), |
196 | construct<IoControlSpec>("FMT =" >> format), |
197 | construct<IoControlSpec>("NML =" >> name), |
198 | construct<IoControlSpec>( |
199 | "ADVANCE =" >> construct<IoControlSpec::CharExpr>( |
200 | pure(IoControlSpec::CharExpr::Kind::Advance), |
201 | scalarDefaultCharExpr)), |
202 | construct<IoControlSpec>(construct<IoControlSpec::Asynchronous>( |
203 | "ASYNCHRONOUS =" >> scalarDefaultCharConstantExpr)), |
204 | construct<IoControlSpec>("BLANK =" >> |
205 | construct<IoControlSpec::CharExpr>( |
206 | pure(IoControlSpec::CharExpr::Kind::Blank), scalarDefaultCharExpr)), |
207 | construct<IoControlSpec>( |
208 | "DECIMAL =" >> construct<IoControlSpec::CharExpr>( |
209 | pure(IoControlSpec::CharExpr::Kind::Decimal), |
210 | scalarDefaultCharExpr)), |
211 | construct<IoControlSpec>("DELIM =" >> |
212 | construct<IoControlSpec::CharExpr>( |
213 | pure(IoControlSpec::CharExpr::Kind::Delim), scalarDefaultCharExpr)), |
214 | construct<IoControlSpec>("END =" >> endLabel), |
215 | construct<IoControlSpec>("EOR =" >> eorLabel), |
216 | construct<IoControlSpec>("ERR =" >> errLabel), |
217 | construct<IoControlSpec>("ID =" >> idVariable), |
218 | construct<IoControlSpec>("IOMSG = " >> msgVariable), |
219 | construct<IoControlSpec>("IOSTAT = " >> statVariable), |
220 | construct<IoControlSpec>("PAD =" >> |
221 | construct<IoControlSpec::CharExpr>( |
222 | pure(IoControlSpec::CharExpr::Kind::Pad), scalarDefaultCharExpr)), |
223 | construct<IoControlSpec>( |
224 | "POS =" >> construct<IoControlSpec::Pos>(scalarIntExpr)), |
225 | construct<IoControlSpec>( |
226 | "REC =" >> construct<IoControlSpec::Rec>(scalarIntExpr)), |
227 | construct<IoControlSpec>("ROUND =" >> |
228 | construct<IoControlSpec::CharExpr>( |
229 | pure(IoControlSpec::CharExpr::Kind::Round), scalarDefaultCharExpr)), |
230 | construct<IoControlSpec>("SIGN =" >> |
231 | construct<IoControlSpec::CharExpr>( |
232 | pure(IoControlSpec::CharExpr::Kind::Sign), scalarDefaultCharExpr)), |
233 | construct<IoControlSpec>( |
234 | "SIZE =" >> construct<IoControlSpec::Size>(scalarIntVariable)))) |
235 | |
236 | // R1211 write-stmt -> WRITE ( io-control-spec-list ) [output-item-list] |
237 | constexpr auto outputItemList{ |
238 | extension<LanguageFeature::IOListLeadingComma>( |
239 | "nonstandard usage: leading comma in output item list"_port_en_US , |
240 | some("," >> outputItem)) || // legacy: allow leading comma |
241 | optionalList(outputItem)}; |
242 | |
243 | TYPE_CONTEXT_PARSER("WRITE statement"_en_US , |
244 | construct<WriteStmt>("WRITE (" >> |
245 | construct<std::optional<IoUnit>>(maybe("UNIT ="_tok ) >> ioUnit), |
246 | "," >> construct<std::optional<Format>>(format), |
247 | defaulted("," >> nonemptyList(ioControlSpec)) / ")" , outputItemList) || |
248 | construct<WriteStmt>( |
249 | "WRITE (" >> construct<std::optional<IoUnit>>(ioUnit), |
250 | construct<std::optional<Format>>(), |
251 | defaulted("," >> nonemptyList(ioControlSpec)) / ")" , |
252 | outputItemList) || |
253 | construct<WriteStmt>("WRITE" >> construct<std::optional<IoUnit>>(), |
254 | construct<std::optional<Format>>(), |
255 | parenthesized(nonemptyList(ioControlSpec)), outputItemList)) |
256 | |
257 | // R1212 print-stmt PRINT format [, output-item-list] |
258 | TYPE_CONTEXT_PARSER("PRINT statement"_en_US , |
259 | construct<PrintStmt>( |
260 | "PRINT" >> format, defaulted("," >> nonemptyList(outputItem)))) |
261 | |
262 | // R1215 format -> default-char-expr | label | * |
263 | // deprecated(ASSIGN): | scalar-int-name |
264 | TYPE_PARSER(construct<Format>(label / !"_."_ch ) || |
265 | construct<Format>(expr / !"="_tok ) || construct<Format>(star)) |
266 | |
267 | // R1216 input-item -> variable | io-implied-do |
268 | TYPE_PARSER(construct<InputItem>(variable) || |
269 | construct<InputItem>(indirect(inputImpliedDo))) |
270 | |
271 | // R1217 output-item -> expr | io-implied-do |
272 | TYPE_PARSER(construct<OutputItem>(expr) || |
273 | construct<OutputItem>(indirect(outputImpliedDo))) |
274 | |
275 | // R1220 io-implied-do-control -> |
276 | // do-variable = scalar-int-expr , scalar-int-expr [, scalar-int-expr] |
277 | constexpr auto ioImpliedDoControl{loopBounds(scalarIntExpr)}; |
278 | |
279 | // R1218 io-implied-do -> ( io-implied-do-object-list , io-implied-do-control ) |
280 | // R1219 io-implied-do-object -> input-item | output-item |
281 | TYPE_CONTEXT_PARSER("input implied DO"_en_US , |
282 | parenthesized( |
283 | construct<InputImpliedDo>(nonemptyList(inputItem / lookAhead(","_tok )), |
284 | "," >> ioImpliedDoControl))) |
285 | TYPE_CONTEXT_PARSER("output implied DO"_en_US , |
286 | parenthesized(construct<OutputImpliedDo>( |
287 | nonemptyList(outputItem / lookAhead(","_tok )), |
288 | "," >> ioImpliedDoControl))) |
289 | |
290 | // R1222 wait-stmt -> WAIT ( wait-spec-list ) |
291 | TYPE_CONTEXT_PARSER("WAIT statement"_en_US , |
292 | "WAIT" >> |
293 | parenthesized(construct<WaitStmt>(nonemptyList(Parser<WaitSpec>{})))) |
294 | |
295 | // R1223 wait-spec -> |
296 | // [UNIT =] file-unit-number | END = label | EOR = label | ERR = label | |
297 | // ID = scalar-int-expr | IOMSG = iomsg-variable | |
298 | // IOSTAT = scalar-int-variable |
299 | constexpr auto idExpr{construct<IdExpr>(scalarIntExpr)}; |
300 | |
301 | TYPE_PARSER(first(construct<WaitSpec>(maybe("UNIT ="_tok ) >> fileUnitNumber), |
302 | construct<WaitSpec>("END =" >> endLabel), |
303 | construct<WaitSpec>("EOR =" >> eorLabel), |
304 | construct<WaitSpec>("ERR =" >> errLabel), |
305 | construct<WaitSpec>("ID =" >> idExpr), |
306 | construct<WaitSpec>("IOMSG =" >> msgVariable), |
307 | construct<WaitSpec>("IOSTAT =" >> statVariable))) |
308 | |
309 | constexpr auto bareUnitNumberAsList{ |
310 | applyFunction(singletonList<PositionOrFlushSpec>, |
311 | construct<PositionOrFlushSpec>(fileUnitNumber))}; |
312 | constexpr auto positionOrFlushSpecList{ |
313 | parenthesized(nonemptyList(positionOrFlushSpec)) || bareUnitNumberAsList}; |
314 | |
315 | // R1224 backspace-stmt -> |
316 | // BACKSPACE file-unit-number | BACKSPACE ( position-spec-list ) |
317 | TYPE_CONTEXT_PARSER("BACKSPACE statement"_en_US , |
318 | construct<BackspaceStmt>("BACKSPACE" >> positionOrFlushSpecList)) |
319 | |
320 | // R1225 endfile-stmt -> |
321 | // ENDFILE file-unit-number | ENDFILE ( position-spec-list ) |
322 | TYPE_CONTEXT_PARSER("ENDFILE statement"_en_US , |
323 | construct<EndfileStmt>("END FILE" >> positionOrFlushSpecList)) |
324 | |
325 | // R1226 rewind-stmt -> REWIND file-unit-number | REWIND ( position-spec-list ) |
326 | TYPE_CONTEXT_PARSER("REWIND statement"_en_US , |
327 | construct<RewindStmt>("REWIND" >> positionOrFlushSpecList)) |
328 | |
329 | // R1227 position-spec -> |
330 | // [UNIT =] file-unit-number | IOMSG = iomsg-variable | |
331 | // IOSTAT = scalar-int-variable | ERR = label |
332 | // R1229 flush-spec -> |
333 | // [UNIT =] file-unit-number | IOSTAT = scalar-int-variable | |
334 | // IOMSG = iomsg-variable | ERR = label |
335 | TYPE_PARSER( |
336 | construct<PositionOrFlushSpec>(maybe("UNIT ="_tok ) >> fileUnitNumber) || |
337 | construct<PositionOrFlushSpec>("IOMSG =" >> msgVariable) || |
338 | construct<PositionOrFlushSpec>("IOSTAT =" >> statVariable) || |
339 | construct<PositionOrFlushSpec>("ERR =" >> errLabel)) |
340 | |
341 | // R1228 flush-stmt -> FLUSH file-unit-number | FLUSH ( flush-spec-list ) |
342 | TYPE_CONTEXT_PARSER("FLUSH statement"_en_US , |
343 | construct<FlushStmt>("FLUSH" >> positionOrFlushSpecList)) |
344 | |
345 | // R1231 inquire-spec -> |
346 | // [UNIT =] file-unit-number | FILE = file-name-expr | |
347 | // ACCESS = scalar-default-char-variable | |
348 | // ACTION = scalar-default-char-variable | |
349 | // ASYNCHRONOUS = scalar-default-char-variable | |
350 | // BLANK = scalar-default-char-variable | |
351 | // DECIMAL = scalar-default-char-variable | |
352 | // DELIM = scalar-default-char-variable | |
353 | // ENCODING = scalar-default-char-variable | |
354 | // ERR = label | EXIST = scalar-logical-variable | |
355 | // FORM = scalar-default-char-variable | |
356 | // FORMATTED = scalar-default-char-variable | |
357 | // ID = scalar-int-expr | IOMSG = iomsg-variable | |
358 | // IOSTAT = scalar-int-variable | |
359 | // NAME = scalar-default-char-variable | |
360 | // NAMED = scalar-logical-variable | |
361 | // NEXTREC = scalar-int-variable | NUMBER = scalar-int-variable | |
362 | // OPENED = scalar-logical-variable | |
363 | // PAD = scalar-default-char-variable | |
364 | // PENDING = scalar-logical-variable | POS = scalar-int-variable | |
365 | // POSITION = scalar-default-char-variable | |
366 | // READ = scalar-default-char-variable | |
367 | // READWRITE = scalar-default-char-variable | |
368 | // RECL = scalar-int-variable | ROUND = scalar-default-char-variable | |
369 | // SEQUENTIAL = scalar-default-char-variable | |
370 | // SIGN = scalar-default-char-variable | |
371 | // SIZE = scalar-int-variable | |
372 | // STREAM = scalar-default-char-variable | |
373 | // STATUS = scalar-default-char-variable | |
374 | // WRITE = scalar-default-char-variable |
375 | // @ | CARRIAGECONTROL = scalar-default-char-variable |
376 | // | CONVERT = scalar-default-char-variable |
377 | // | DISPOSE = scalar-default-char-variable |
378 | TYPE_PARSER(first(construct<InquireSpec>(maybe("UNIT ="_tok ) >> fileUnitNumber), |
379 | construct<InquireSpec>("FILE =" >> fileNameExpr), |
380 | construct<InquireSpec>( |
381 | "ACCESS =" >> construct<InquireSpec::CharVar>( |
382 | pure(InquireSpec::CharVar::Kind::Access), |
383 | scalarDefaultCharVariable)), |
384 | construct<InquireSpec>( |
385 | "ACTION =" >> construct<InquireSpec::CharVar>( |
386 | pure(InquireSpec::CharVar::Kind::Action), |
387 | scalarDefaultCharVariable)), |
388 | construct<InquireSpec>( |
389 | "ASYNCHRONOUS =" >> construct<InquireSpec::CharVar>( |
390 | pure(InquireSpec::CharVar::Kind::Asynchronous), |
391 | scalarDefaultCharVariable)), |
392 | construct<InquireSpec>("BLANK =" >> |
393 | construct<InquireSpec::CharVar>(pure(InquireSpec::CharVar::Kind::Blank), |
394 | scalarDefaultCharVariable)), |
395 | construct<InquireSpec>( |
396 | "DECIMAL =" >> construct<InquireSpec::CharVar>( |
397 | pure(InquireSpec::CharVar::Kind::Decimal), |
398 | scalarDefaultCharVariable)), |
399 | construct<InquireSpec>("DELIM =" >> |
400 | construct<InquireSpec::CharVar>(pure(InquireSpec::CharVar::Kind::Delim), |
401 | scalarDefaultCharVariable)), |
402 | construct<InquireSpec>( |
403 | "DIRECT =" >> construct<InquireSpec::CharVar>( |
404 | pure(InquireSpec::CharVar::Kind::Direct), |
405 | scalarDefaultCharVariable)), |
406 | construct<InquireSpec>( |
407 | "ENCODING =" >> construct<InquireSpec::CharVar>( |
408 | pure(InquireSpec::CharVar::Kind::Encoding), |
409 | scalarDefaultCharVariable)), |
410 | construct<InquireSpec>("ERR =" >> errLabel), |
411 | construct<InquireSpec>("EXIST =" >> |
412 | construct<InquireSpec::LogVar>( |
413 | pure(InquireSpec::LogVar::Kind::Exist), scalarLogicalVariable)), |
414 | construct<InquireSpec>("FORM =" >> |
415 | construct<InquireSpec::CharVar>( |
416 | pure(InquireSpec::CharVar::Kind::Form), scalarDefaultCharVariable)), |
417 | construct<InquireSpec>( |
418 | "FORMATTED =" >> construct<InquireSpec::CharVar>( |
419 | pure(InquireSpec::CharVar::Kind::Formatted), |
420 | scalarDefaultCharVariable)), |
421 | construct<InquireSpec>("ID =" >> idExpr), |
422 | construct<InquireSpec>("IOMSG =" >> |
423 | construct<InquireSpec::CharVar>(pure(InquireSpec::CharVar::Kind::Iomsg), |
424 | scalarDefaultCharVariable)), |
425 | construct<InquireSpec>("IOSTAT =" >> |
426 | construct<InquireSpec::IntVar>(pure(InquireSpec::IntVar::Kind::Iostat), |
427 | scalar(integer(variable)))), |
428 | construct<InquireSpec>("NAME =" >> |
429 | construct<InquireSpec::CharVar>( |
430 | pure(InquireSpec::CharVar::Kind::Name), scalarDefaultCharVariable)), |
431 | construct<InquireSpec>("NAMED =" >> |
432 | construct<InquireSpec::LogVar>( |
433 | pure(InquireSpec::LogVar::Kind::Named), scalarLogicalVariable)), |
434 | construct<InquireSpec>("NEXTREC =" >> |
435 | construct<InquireSpec::IntVar>(pure(InquireSpec::IntVar::Kind::Nextrec), |
436 | scalar(integer(variable)))), |
437 | construct<InquireSpec>("NUMBER =" >> |
438 | construct<InquireSpec::IntVar>(pure(InquireSpec::IntVar::Kind::Number), |
439 | scalar(integer(variable)))), |
440 | construct<InquireSpec>("OPENED =" >> |
441 | construct<InquireSpec::LogVar>( |
442 | pure(InquireSpec::LogVar::Kind::Opened), scalarLogicalVariable)), |
443 | construct<InquireSpec>("PAD =" >> |
444 | construct<InquireSpec::CharVar>( |
445 | pure(InquireSpec::CharVar::Kind::Pad), scalarDefaultCharVariable)), |
446 | construct<InquireSpec>("PENDING =" >> |
447 | construct<InquireSpec::LogVar>( |
448 | pure(InquireSpec::LogVar::Kind::Pending), scalarLogicalVariable)), |
449 | construct<InquireSpec>("POS =" >> |
450 | construct<InquireSpec::IntVar>( |
451 | pure(InquireSpec::IntVar::Kind::Pos), scalar(integer(variable)))), |
452 | construct<InquireSpec>( |
453 | "POSITION =" >> construct<InquireSpec::CharVar>( |
454 | pure(InquireSpec::CharVar::Kind::Position), |
455 | scalarDefaultCharVariable)), |
456 | construct<InquireSpec>("READ =" >> |
457 | construct<InquireSpec::CharVar>( |
458 | pure(InquireSpec::CharVar::Kind::Read), scalarDefaultCharVariable)), |
459 | construct<InquireSpec>( |
460 | "READWRITE =" >> construct<InquireSpec::CharVar>( |
461 | pure(InquireSpec::CharVar::Kind::Readwrite), |
462 | scalarDefaultCharVariable)), |
463 | construct<InquireSpec>("RECL =" >> |
464 | construct<InquireSpec::IntVar>( |
465 | pure(InquireSpec::IntVar::Kind::Recl), scalar(integer(variable)))), |
466 | construct<InquireSpec>("ROUND =" >> |
467 | construct<InquireSpec::CharVar>(pure(InquireSpec::CharVar::Kind::Round), |
468 | scalarDefaultCharVariable)), |
469 | construct<InquireSpec>( |
470 | "SEQUENTIAL =" >> construct<InquireSpec::CharVar>( |
471 | pure(InquireSpec::CharVar::Kind::Sequential), |
472 | scalarDefaultCharVariable)), |
473 | construct<InquireSpec>("SIGN =" >> |
474 | construct<InquireSpec::CharVar>( |
475 | pure(InquireSpec::CharVar::Kind::Sign), scalarDefaultCharVariable)), |
476 | construct<InquireSpec>("SIZE =" >> |
477 | construct<InquireSpec::IntVar>( |
478 | pure(InquireSpec::IntVar::Kind::Size), scalar(integer(variable)))), |
479 | construct<InquireSpec>( |
480 | "STREAM =" >> construct<InquireSpec::CharVar>( |
481 | pure(InquireSpec::CharVar::Kind::Stream), |
482 | scalarDefaultCharVariable)), |
483 | construct<InquireSpec>( |
484 | "STATUS =" >> construct<InquireSpec::CharVar>( |
485 | pure(InquireSpec::CharVar::Kind::Status), |
486 | scalarDefaultCharVariable)), |
487 | construct<InquireSpec>( |
488 | "UNFORMATTED =" >> construct<InquireSpec::CharVar>( |
489 | pure(InquireSpec::CharVar::Kind::Unformatted), |
490 | scalarDefaultCharVariable)), |
491 | construct<InquireSpec>("WRITE =" >> |
492 | construct<InquireSpec::CharVar>(pure(InquireSpec::CharVar::Kind::Write), |
493 | scalarDefaultCharVariable)), |
494 | extension<LanguageFeature::Carriagecontrol>( |
495 | "nonstandard usage: CARRIAGECONTROL="_port_en_US , |
496 | construct<InquireSpec>("CARRIAGECONTROL =" >> |
497 | construct<InquireSpec::CharVar>( |
498 | pure(InquireSpec::CharVar::Kind::Carriagecontrol), |
499 | scalarDefaultCharVariable))), |
500 | extension<LanguageFeature::Convert>( |
501 | "nonstandard usage: CONVERT="_port_en_US , |
502 | construct<InquireSpec>( |
503 | "CONVERT =" >> construct<InquireSpec::CharVar>( |
504 | pure(InquireSpec::CharVar::Kind::Convert), |
505 | scalarDefaultCharVariable))), |
506 | extension<LanguageFeature::Dispose>( |
507 | "nonstandard usage: DISPOSE="_port_en_US , |
508 | construct<InquireSpec>( |
509 | "DISPOSE =" >> construct<InquireSpec::CharVar>( |
510 | pure(InquireSpec::CharVar::Kind::Dispose), |
511 | scalarDefaultCharVariable))))) |
512 | |
513 | // R1230 inquire-stmt -> |
514 | // INQUIRE ( inquire-spec-list ) | |
515 | // INQUIRE ( IOLENGTH = scalar-int-variable ) output-item-list |
516 | TYPE_CONTEXT_PARSER("INQUIRE statement"_en_US , |
517 | "INQUIRE" >> |
518 | (construct<InquireStmt>( |
519 | parenthesized(nonemptyList(Parser<InquireSpec>{}))) || |
520 | construct<InquireStmt>(construct<InquireStmt::Iolength>( |
521 | parenthesized("IOLENGTH =" >> scalar(integer(variable))), |
522 | nonemptyList(outputItem))))) |
523 | |
524 | // R1301 format-stmt -> FORMAT format-specification |
525 | // 13.2.1 allows spaces to appear "at any point" within a format specification |
526 | // without effect, except of course within a character string edit descriptor. |
527 | TYPE_CONTEXT_PARSER("FORMAT statement"_en_US , |
528 | construct<FormatStmt>("FORMAT" >> Parser<format::FormatSpecification>{})) |
529 | |
530 | // R1321 char-string-edit-desc |
531 | // N.B. C1313 disallows any kind parameter on the character literal. |
532 | constexpr auto charStringEditDesc{ |
533 | space >> (charLiteralConstantWithoutKind || rawHollerithLiteral)}; |
534 | |
535 | // R1303 format-items -> format-item [[,] format-item]... |
536 | constexpr auto formatItems{ |
537 | nonemptySeparated(space >> Parser<format::FormatItem>{}, maybe(","_tok ))}; |
538 | |
539 | // R1306 r -> digit-string |
540 | constexpr DigitStringIgnoreSpaces repeat; |
541 | |
542 | // R1304 format-item -> |
543 | // [r] data-edit-desc | control-edit-desc | char-string-edit-desc | |
544 | // [r] ( format-items ) |
545 | TYPE_PARSER(construct<format::FormatItem>( |
546 | maybe(repeat), Parser<format::IntrinsicTypeDataEditDesc>{}) || |
547 | construct<format::FormatItem>( |
548 | maybe(repeat), Parser<format::DerivedTypeDataEditDesc>{}) || |
549 | construct<format::FormatItem>(Parser<format::ControlEditDesc>{}) || |
550 | construct<format::FormatItem>(charStringEditDesc) || |
551 | construct<format::FormatItem>(maybe(repeat), parenthesized(formatItems))) |
552 | |
553 | // R1302 format-specification -> |
554 | // ( [format-items] ) | ( [format-items ,] unlimited-format-item ) |
555 | // R1305 unlimited-format-item -> * ( format-items ) |
556 | // minor extension: the comma is optional before the unlimited-format-item |
557 | TYPE_PARSER(parenthesized(construct<format::FormatSpecification>( |
558 | defaulted(formatItems / maybe(","_tok )), |
559 | "*" >> parenthesized(formatItems)) || |
560 | construct<format::FormatSpecification>(defaulted(formatItems)))) |
561 | // R1308 w -> digit-string |
562 | // R1309 m -> digit-string |
563 | // R1310 d -> digit-string |
564 | // R1311 e -> digit-string |
565 | constexpr auto width{repeat}; |
566 | constexpr auto mandatoryWidth{construct<std::optional<int>>(width)}; |
567 | constexpr auto digits{repeat}; |
568 | constexpr auto noInt{construct<std::optional<int>>()}; |
569 | constexpr auto mandatoryDigits{construct<std::optional<int>>("." >> width)}; |
570 | |
571 | // The extra trailing spaces in the following quoted edit descriptor token |
572 | // parsers are intentional: they inhibit any spurious warnings about missing |
573 | // spaces in pedantic mode that would otherwise be emitted if the edit |
574 | // descriptor were followed by a character that could appear in an identifier. |
575 | |
576 | // R1307 data-edit-desc -> |
577 | // I w [. m] | B w [. m] | O w [. m] | Z w [. m] | F w . d | |
578 | // E w . d [E e] | EN w . d [E e] | ES w . d [E e] | EX w . d [E e] | |
579 | // G w [. d [E e]] | L w | A [w] | D w . d | |
580 | // DT [char-literal-constant] [( v-list )] |
581 | // (part 1 of 2) |
582 | TYPE_PARSER(construct<format::IntrinsicTypeDataEditDesc>( |
583 | "I " >> pure(format::IntrinsicTypeDataEditDesc::Kind::I) || |
584 | "B " >> pure(format::IntrinsicTypeDataEditDesc::Kind::B) || |
585 | "O " >> pure(format::IntrinsicTypeDataEditDesc::Kind::O) || |
586 | "Z " >> pure(format::IntrinsicTypeDataEditDesc::Kind::Z), |
587 | mandatoryWidth, maybe("." >> digits), noInt) || |
588 | construct<format::IntrinsicTypeDataEditDesc>( |
589 | "F " >> pure(format::IntrinsicTypeDataEditDesc::Kind::F) || |
590 | "D " >> pure(format::IntrinsicTypeDataEditDesc::Kind::D), |
591 | mandatoryWidth, mandatoryDigits, noInt) || |
592 | construct<format::IntrinsicTypeDataEditDesc>( |
593 | "E " >> ("N " >> pure(format::IntrinsicTypeDataEditDesc::Kind::EN) || |
594 | "S " >> pure(format::IntrinsicTypeDataEditDesc::Kind::ES) || |
595 | "X " >> pure(format::IntrinsicTypeDataEditDesc::Kind::EX) || |
596 | pure(format::IntrinsicTypeDataEditDesc::Kind::E)), |
597 | mandatoryWidth, mandatoryDigits, maybe("E " >> digits)) || |
598 | construct<format::IntrinsicTypeDataEditDesc>( |
599 | "G " >> pure(format::IntrinsicTypeDataEditDesc::Kind::G), |
600 | mandatoryWidth, mandatoryDigits, maybe("E " >> digits)) || |
601 | construct<format::IntrinsicTypeDataEditDesc>( |
602 | "G " >> pure(format::IntrinsicTypeDataEditDesc::Kind::G) || |
603 | "L " >> pure(format::IntrinsicTypeDataEditDesc::Kind::L), |
604 | mandatoryWidth, noInt, noInt) || |
605 | construct<format::IntrinsicTypeDataEditDesc>( |
606 | "A " >> pure(format::IntrinsicTypeDataEditDesc::Kind::A), maybe(width), |
607 | noInt, noInt) || |
608 | // PGI/Intel extension: omitting width (and all else that follows) |
609 | // Parse them just to get them to the I/O checker in semantics; |
610 | // they are not supported by the runtime. |
611 | extension<LanguageFeature::AbbreviatedEditDescriptor>(construct< |
612 | format::IntrinsicTypeDataEditDesc>( |
613 | "I " >> pure(format::IntrinsicTypeDataEditDesc::Kind::I) || |
614 | ("B "_tok / !letter /* don't occlude BN & BZ */) >> |
615 | pure(format::IntrinsicTypeDataEditDesc::Kind::B) || |
616 | "O " >> pure(format::IntrinsicTypeDataEditDesc::Kind::O) || |
617 | "Z " >> pure(format::IntrinsicTypeDataEditDesc::Kind::Z) || |
618 | "F " >> pure(format::IntrinsicTypeDataEditDesc::Kind::F) || |
619 | ("D "_tok / !letter /* don't occlude DT, DC, & DP */) >> |
620 | pure(format::IntrinsicTypeDataEditDesc::Kind::D) || |
621 | "E " >> |
622 | ("N " >> pure(format::IntrinsicTypeDataEditDesc::Kind::EN) || |
623 | "S " >> pure(format::IntrinsicTypeDataEditDesc::Kind::ES) || |
624 | "X " >> pure(format::IntrinsicTypeDataEditDesc::Kind::EX) || |
625 | pure(format::IntrinsicTypeDataEditDesc::Kind::E)) || |
626 | "G " >> pure(format::IntrinsicTypeDataEditDesc::Kind::G) || |
627 | "L " >> pure(format::IntrinsicTypeDataEditDesc::Kind::L), |
628 | noInt, noInt, noInt))) |
629 | |
630 | // R1307 data-edit-desc (part 2 of 2) |
631 | // R1312 v -> [sign] digit-string |
632 | constexpr SignedDigitStringIgnoreSpaces scaleFactor; |
633 | TYPE_PARSER(construct<format::DerivedTypeDataEditDesc>( |
634 | "D T" >> defaulted(charLiteralConstantWithoutKind), |
635 | defaulted(parenthesized(nonemptyList(scaleFactor))))) |
636 | |
637 | // R1314 k -> [sign] digit-string |
638 | constexpr PositiveDigitStringIgnoreSpaces count; |
639 | |
640 | // R1313 control-edit-desc -> |
641 | // position-edit-desc | [r] / | : | sign-edit-desc | k P | |
642 | // blank-interp-edit-desc | round-edit-desc | decimal-edit-desc | |
643 | // @ \ | $ |
644 | // R1315 position-edit-desc -> T n | TL n | TR n | n X |
645 | // R1316 n -> digit-string |
646 | // R1317 sign-edit-desc -> SS | SP | S |
647 | // R1318 blank-interp-edit-desc -> BN | BZ |
648 | // R1319 round-edit-desc -> RU | RD | RZ | RN | RC | RP |
649 | // R1320 decimal-edit-desc -> DC | DP |
650 | TYPE_PARSER(construct<format::ControlEditDesc>( |
651 | "T L " >> pure(format::ControlEditDesc::Kind::TL) || |
652 | "T R " >> pure(format::ControlEditDesc::Kind::TR) || |
653 | "T " >> pure(format::ControlEditDesc::Kind::T), |
654 | count) || |
655 | construct<format::ControlEditDesc>(count, |
656 | "X " >> pure(format::ControlEditDesc::Kind::X) || |
657 | "/" >> pure(format::ControlEditDesc::Kind::Slash)) || |
658 | construct<format::ControlEditDesc>( |
659 | "X " >> pure(format::ControlEditDesc::Kind::X) || |
660 | "/" >> pure(format::ControlEditDesc::Kind::Slash)) || |
661 | construct<format::ControlEditDesc>( |
662 | scaleFactor, "P " >> pure(format::ControlEditDesc::Kind::P)) || |
663 | construct<format::ControlEditDesc>( |
664 | ":" >> pure(format::ControlEditDesc::Kind::Colon)) || |
665 | "S " >> ("S " >> construct<format::ControlEditDesc>( |
666 | pure(format::ControlEditDesc::Kind::SS)) || |
667 | "P " >> construct<format::ControlEditDesc>( |
668 | pure(format::ControlEditDesc::Kind::SP)) || |
669 | construct<format::ControlEditDesc>( |
670 | pure(format::ControlEditDesc::Kind::S))) || |
671 | "B " >> ("N " >> construct<format::ControlEditDesc>( |
672 | pure(format::ControlEditDesc::Kind::BN)) || |
673 | "Z " >> construct<format::ControlEditDesc>( |
674 | pure(format::ControlEditDesc::Kind::BZ))) || |
675 | "R " >> ("U " >> construct<format::ControlEditDesc>( |
676 | pure(format::ControlEditDesc::Kind::RU)) || |
677 | "D " >> construct<format::ControlEditDesc>( |
678 | pure(format::ControlEditDesc::Kind::RD)) || |
679 | "Z " >> construct<format::ControlEditDesc>( |
680 | pure(format::ControlEditDesc::Kind::RZ)) || |
681 | "N " >> construct<format::ControlEditDesc>( |
682 | pure(format::ControlEditDesc::Kind::RN)) || |
683 | "C " >> construct<format::ControlEditDesc>( |
684 | pure(format::ControlEditDesc::Kind::RC)) || |
685 | "P " >> construct<format::ControlEditDesc>( |
686 | pure(format::ControlEditDesc::Kind::RP))) || |
687 | "D " >> ("C " >> construct<format::ControlEditDesc>( |
688 | pure(format::ControlEditDesc::Kind::DC)) || |
689 | "P " >> construct<format::ControlEditDesc>( |
690 | pure(format::ControlEditDesc::Kind::DP))) || |
691 | extension<LanguageFeature::AdditionalFormats>( |
692 | "nonstandard usage: $ and \\ control edit descriptors"_port_en_US , |
693 | "$" >> construct<format::ControlEditDesc>( |
694 | pure(format::ControlEditDesc::Kind::Dollar)) || |
695 | "\\" >> construct<format::ControlEditDesc>( |
696 | pure(format::ControlEditDesc::Kind::Backslash)))) |
697 | } // namespace Fortran::parser |
698 | |