| 1 | //! Declaration parser. |
| 2 | //! |
| 3 | //! Parses type declarations, USE statements, IMPLICIT, derived type |
| 4 | //! definitions, and legacy declaration forms (COMMON, DATA, etc.). |
| 5 | |
| 6 | use super::{ParseError, Parser}; |
| 7 | use crate::ast::decl::*; |
| 8 | use crate::ast::Spanned; |
| 9 | use crate::lexer::TokenKind; |
| 10 | |
| 11 | impl<'a> Parser<'a> { |
| 12 | // ---- Type specifier parsing ---- |
| 13 | |
| 14 | /// Try to parse a type specifier. Returns None if current token isn't a type keyword. |
| 15 | pub fn try_parse_type_spec(&mut self) -> Option<Result<TypeSpec, ParseError>> { |
| 16 | let text = self.peek_text().to_lowercase(); |
| 17 | match text.as_str() { |
| 18 | "integer" => { |
| 19 | self.advance(); |
| 20 | Some(self.parse_kind_selector().map(TypeSpec::Integer)) |
| 21 | } |
| 22 | "real" => { |
| 23 | self.advance(); |
| 24 | Some(self.parse_kind_selector().map(TypeSpec::Real)) |
| 25 | } |
| 26 | "doubleprecision" | "double" => { |
| 27 | self.advance(); |
| 28 | // Handle "double precision" / "double complex" as two tokens. |
| 29 | if self.peek_text().eq_ignore_ascii_case("precision") { |
| 30 | self.advance(); |
| 31 | Some(Ok(TypeSpec::DoublePrecision)) |
| 32 | } else if self.peek_text().eq_ignore_ascii_case("complex") { |
| 33 | self.advance(); |
| 34 | Some(Ok(TypeSpec::DoubleComplex)) |
| 35 | } else { |
| 36 | Some(Ok(TypeSpec::DoublePrecision)) |
| 37 | } |
| 38 | } |
| 39 | "complex" => { |
| 40 | self.advance(); |
| 41 | Some(self.parse_kind_selector().map(TypeSpec::Complex)) |
| 42 | } |
| 43 | "doublecomplex" => { |
| 44 | self.advance(); |
| 45 | Some(Ok(TypeSpec::DoubleComplex)) |
| 46 | } |
| 47 | "logical" => { |
| 48 | self.advance(); |
| 49 | Some(self.parse_kind_selector().map(TypeSpec::Logical)) |
| 50 | } |
| 51 | "character" => { |
| 52 | self.advance(); |
| 53 | Some(self.parse_char_selector().map(TypeSpec::Character)) |
| 54 | } |
| 55 | "type" => { |
| 56 | // type(name) is a type specifier, but type :: name is a derived type definition. |
| 57 | // Only consume if followed by (. |
| 58 | let next_pos = self.pos + 1; |
| 59 | if next_pos < self.tokens.len() && self.tokens[next_pos].kind == TokenKind::LParen { |
| 60 | self.advance(); |
| 61 | Some(self.parse_type_or_class_spec(false)) |
| 62 | } else { |
| 63 | None // Not a type specifier — could be a derived type def. |
| 64 | } |
| 65 | } |
| 66 | "class" => { |
| 67 | self.advance(); |
| 68 | Some(self.parse_type_or_class_spec(true)) |
| 69 | } |
| 70 | _ => None, |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | /// Parse a type specifier for IMPLICIT — without consuming a kind selector, |
| 75 | /// since the parenthesized part is the letter range, not a kind. |
| 76 | fn parse_implicit_type_spec(&mut self) -> Option<Result<TypeSpec, ParseError>> { |
| 77 | let text = self.peek_text().to_lowercase(); |
| 78 | match text.as_str() { |
| 79 | "integer" => { |
| 80 | self.advance(); |
| 81 | Some(Ok(TypeSpec::Integer(None))) |
| 82 | } |
| 83 | "real" => { |
| 84 | self.advance(); |
| 85 | Some(Ok(TypeSpec::Real(None))) |
| 86 | } |
| 87 | "doubleprecision" | "double" => { |
| 88 | self.advance(); |
| 89 | if self.peek_text().eq_ignore_ascii_case("precision") { |
| 90 | self.advance(); |
| 91 | Some(Ok(TypeSpec::DoublePrecision)) |
| 92 | } else if self.peek_text().eq_ignore_ascii_case("complex") { |
| 93 | self.advance(); |
| 94 | Some(Ok(TypeSpec::DoubleComplex)) |
| 95 | } else { |
| 96 | Some(Ok(TypeSpec::DoublePrecision)) |
| 97 | } |
| 98 | } |
| 99 | "complex" => { |
| 100 | self.advance(); |
| 101 | Some(Ok(TypeSpec::Complex(None))) |
| 102 | } |
| 103 | "logical" => { |
| 104 | self.advance(); |
| 105 | Some(Ok(TypeSpec::Logical(None))) |
| 106 | } |
| 107 | "character" => { |
| 108 | self.advance(); |
| 109 | Some(Ok(TypeSpec::Character(None))) |
| 110 | } |
| 111 | _ => None, |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | fn parse_kind_selector(&mut self) -> Result<Option<KindSelector>, ParseError> { |
| 116 | // Check for *N (old-style) |
| 117 | if self.eat(&TokenKind::Star) { |
| 118 | let expr = self.parse_expr()?; |
| 119 | return Ok(Some(KindSelector::Star(expr))); |
| 120 | } |
| 121 | // Check for (kind=N) or (N) |
| 122 | if self.peek() != &TokenKind::LParen { |
| 123 | return Ok(None); |
| 124 | } |
| 125 | self.advance(); // ( |
| 126 | // Check for kind= keyword |
| 127 | if self.peek_text().eq_ignore_ascii_case("kind") { |
| 128 | let next_pos = self.pos + 1; |
| 129 | if next_pos < self.tokens.len() && self.tokens[next_pos].kind == TokenKind::Assign { |
| 130 | self.advance(); // kind |
| 131 | self.advance(); // = |
| 132 | } |
| 133 | } |
| 134 | let expr = self.parse_expr()?; |
| 135 | self.expect(&TokenKind::RParen)?; |
| 136 | Ok(Some(KindSelector::Expr(expr))) |
| 137 | } |
| 138 | |
| 139 | fn parse_char_selector(&mut self) -> Result<Option<CharSelector>, ParseError> { |
| 140 | // Check for *N (old-style) |
| 141 | if self.eat(&TokenKind::Star) { |
| 142 | let len = self.parse_len_spec()?; |
| 143 | return Ok(Some(CharSelector { |
| 144 | len: Some(len), |
| 145 | kind: None, |
| 146 | })); |
| 147 | } |
| 148 | if self.peek() != &TokenKind::LParen { |
| 149 | return Ok(None); |
| 150 | } |
| 151 | self.advance(); // ( |
| 152 | |
| 153 | let mut len = None; |
| 154 | let mut kind = None; |
| 155 | |
| 156 | // Parse len and/or kind parameters. |
| 157 | if self.peek_text().eq_ignore_ascii_case("len") { |
| 158 | let next_pos = self.pos + 1; |
| 159 | if next_pos < self.tokens.len() && self.tokens[next_pos].kind == TokenKind::Assign { |
| 160 | self.advance(); // len |
| 161 | self.advance(); // = |
| 162 | len = Some(self.parse_len_spec()?); |
| 163 | } else { |
| 164 | // Just a number — treat as len. |
| 165 | len = Some(self.parse_len_spec()?); |
| 166 | } |
| 167 | } else if self.peek_text().eq_ignore_ascii_case("kind") { |
| 168 | let next_pos = self.pos + 1; |
| 169 | if next_pos < self.tokens.len() && self.tokens[next_pos].kind == TokenKind::Assign { |
| 170 | self.advance(); // kind |
| 171 | self.advance(); // = |
| 172 | kind = Some(self.parse_expr()?); |
| 173 | } |
| 174 | } else { |
| 175 | // Bare number or expression — treat as len. |
| 176 | len = Some(self.parse_len_spec()?); |
| 177 | } |
| 178 | |
| 179 | // Check for comma and second parameter. |
| 180 | if self.eat(&TokenKind::Comma) { |
| 181 | if self.peek_text().eq_ignore_ascii_case("kind") { |
| 182 | let next_pos = self.pos + 1; |
| 183 | if next_pos < self.tokens.len() && self.tokens[next_pos].kind == TokenKind::Assign { |
| 184 | self.advance(); // kind |
| 185 | self.advance(); // = |
| 186 | } |
| 187 | } else if self.peek_text().eq_ignore_ascii_case("len") { |
| 188 | let next_pos = self.pos + 1; |
| 189 | if next_pos < self.tokens.len() && self.tokens[next_pos].kind == TokenKind::Assign { |
| 190 | self.advance(); // len |
| 191 | self.advance(); // = |
| 192 | len = Some(self.parse_len_spec()?); |
| 193 | self.expect(&TokenKind::RParen)?; |
| 194 | return Ok(Some(CharSelector { len, kind })); |
| 195 | } |
| 196 | } |
| 197 | if kind.is_none() { |
| 198 | kind = Some(self.parse_expr()?); |
| 199 | } else { |
| 200 | len = Some(self.parse_len_spec()?); |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | self.expect(&TokenKind::RParen)?; |
| 205 | Ok(Some(CharSelector { len, kind })) |
| 206 | } |
| 207 | |
| 208 | fn parse_len_spec(&mut self) -> Result<LenSpec, ParseError> { |
| 209 | if self.eat(&TokenKind::Star) { |
| 210 | return Ok(LenSpec::Star); |
| 211 | } |
| 212 | if self.peek() == &TokenKind::Colon { |
| 213 | self.advance(); |
| 214 | return Ok(LenSpec::Colon); |
| 215 | } |
| 216 | // F77 entity-decl character-length form: `name*(*)`, `name*(:)`, |
| 217 | // `name*(N)`. The leading `*` is consumed by the caller; here we |
| 218 | // see the parenthesized inner form. Per F2018 §C.6.1 these are |
| 219 | // the type-param-value alternatives `*`, `:`, and a scalar |
| 220 | // int-expr. The plain `parse_expr` can't accept the bare `*` or |
| 221 | // `:` form, so unwrap one level of parens before delegating. |
| 222 | if self.peek() == &TokenKind::LParen { |
| 223 | self.advance(); |
| 224 | let inner = if self.eat(&TokenKind::Star) { |
| 225 | LenSpec::Star |
| 226 | } else if self.eat(&TokenKind::Colon) { |
| 227 | LenSpec::Colon |
| 228 | } else { |
| 229 | LenSpec::Expr(self.parse_expr()?) |
| 230 | }; |
| 231 | self.expect(&TokenKind::RParen)?; |
| 232 | return Ok(inner); |
| 233 | } |
| 234 | let expr = self.parse_expr()?; |
| 235 | Ok(LenSpec::Expr(expr)) |
| 236 | } |
| 237 | |
| 238 | fn parse_type_or_class_spec(&mut self, is_class: bool) -> Result<TypeSpec, ParseError> { |
| 239 | self.expect(&TokenKind::LParen)?; |
| 240 | if self.eat(&TokenKind::Star) { |
| 241 | self.expect(&TokenKind::RParen)?; |
| 242 | return Ok(if is_class { |
| 243 | TypeSpec::ClassStar |
| 244 | } else { |
| 245 | TypeSpec::TypeStar |
| 246 | }); |
| 247 | } |
| 248 | if self.peek() != &TokenKind::Identifier { |
| 249 | return Err(self.error(format!("expected type name, got {}", self.peek()))); |
| 250 | } |
| 251 | let name_tok = self.advance().clone(); |
| 252 | let name = name_tok.text; |
| 253 | self.expect(&TokenKind::RParen)?; |
| 254 | Ok(if is_class { |
| 255 | TypeSpec::Class(name) |
| 256 | } else { |
| 257 | TypeSpec::Type(name) |
| 258 | }) |
| 259 | } |
| 260 | |
| 261 | // ---- Attribute parsing ---- |
| 262 | |
| 263 | /// Try to parse a declaration attribute after a comma. |
| 264 | pub fn try_parse_attribute(&mut self) -> Option<Result<Attribute, ParseError>> { |
| 265 | let text = self.peek_text().to_lowercase(); |
| 266 | match text.as_str() { |
| 267 | "allocatable" => { |
| 268 | self.advance(); |
| 269 | Some(Ok(Attribute::Allocatable)) |
| 270 | } |
| 271 | "pointer" => { |
| 272 | self.advance(); |
| 273 | Some(Ok(Attribute::Pointer)) |
| 274 | } |
| 275 | "target" => { |
| 276 | self.advance(); |
| 277 | Some(Ok(Attribute::Target)) |
| 278 | } |
| 279 | "optional" => { |
| 280 | self.advance(); |
| 281 | Some(Ok(Attribute::Optional)) |
| 282 | } |
| 283 | "save" => { |
| 284 | self.advance(); |
| 285 | Some(Ok(Attribute::Save)) |
| 286 | } |
| 287 | "parameter" => { |
| 288 | self.advance(); |
| 289 | Some(Ok(Attribute::Parameter)) |
| 290 | } |
| 291 | "value" => { |
| 292 | self.advance(); |
| 293 | Some(Ok(Attribute::Value)) |
| 294 | } |
| 295 | "volatile" => { |
| 296 | self.advance(); |
| 297 | Some(Ok(Attribute::Volatile)) |
| 298 | } |
| 299 | "asynchronous" => { |
| 300 | self.advance(); |
| 301 | Some(Ok(Attribute::Asynchronous)) |
| 302 | } |
| 303 | "protected" => { |
| 304 | self.advance(); |
| 305 | Some(Ok(Attribute::Protected)) |
| 306 | } |
| 307 | "contiguous" => { |
| 308 | self.advance(); |
| 309 | Some(Ok(Attribute::Contiguous)) |
| 310 | } |
| 311 | "external" => { |
| 312 | self.advance(); |
| 313 | Some(Ok(Attribute::External)) |
| 314 | } |
| 315 | "intrinsic" => { |
| 316 | self.advance(); |
| 317 | Some(Ok(Attribute::Intrinsic)) |
| 318 | } |
| 319 | "public" => { |
| 320 | self.advance(); |
| 321 | Some(Ok(Attribute::Public)) |
| 322 | } |
| 323 | "private" => { |
| 324 | self.advance(); |
| 325 | Some(Ok(Attribute::Private)) |
| 326 | } |
| 327 | "dimension" => { |
| 328 | self.advance(); |
| 329 | Some(self.parse_dimension_spec().map(Attribute::Dimension)) |
| 330 | } |
| 331 | "intent" => { |
| 332 | self.advance(); |
| 333 | Some(self.parse_intent_spec().map(Attribute::Intent)) |
| 334 | } |
| 335 | "bind" => { |
| 336 | self.advance(); |
| 337 | Some(self.parse_bind_spec().map(Attribute::Bind)) |
| 338 | } |
| 339 | _ => None, |
| 340 | } |
| 341 | } |
| 342 | |
| 343 | fn parse_dimension_spec(&mut self) -> Result<Vec<ArraySpec>, ParseError> { |
| 344 | self.expect(&TokenKind::LParen)?; |
| 345 | let specs = self.parse_array_spec_list()?; |
| 346 | self.expect(&TokenKind::RParen)?; |
| 347 | Ok(specs) |
| 348 | } |
| 349 | |
| 350 | fn parse_array_spec_list(&mut self) -> Result<Vec<ArraySpec>, ParseError> { |
| 351 | let mut specs = Vec::new(); |
| 352 | loop { |
| 353 | specs.push(self.parse_one_array_spec()?); |
| 354 | if !self.eat(&TokenKind::Comma) { |
| 355 | break; |
| 356 | } |
| 357 | } |
| 358 | Ok(specs) |
| 359 | } |
| 360 | |
| 361 | fn parse_one_array_spec(&mut self) -> Result<ArraySpec, ParseError> { |
| 362 | // Assumed rank: (..) — F2018. The lexer produces two Dot tokens or |
| 363 | // a DotOp. We check for consecutive dots. |
| 364 | if self.peek_text() == ".." || self.peek_text() == "." { |
| 365 | // Try consuming .. as assumed rank. |
| 366 | let save = self.pos; |
| 367 | if self.peek_text() == ".." { |
| 368 | self.advance(); |
| 369 | return Ok(ArraySpec::AssumedRank); |
| 370 | } |
| 371 | self.pos = save; |
| 372 | } |
| 373 | |
| 374 | // Bare colon (:) — either deferred shape (allocatable/pointer) or |
| 375 | // assumed shape (dummy argument). The distinction depends on context |
| 376 | // (allocatable attribute), so we emit Deferred and let sema reclassify |
| 377 | // to AssumedShape if needed. |
| 378 | if self.peek() == &TokenKind::Colon { |
| 379 | self.advance(); |
| 380 | return Ok(ArraySpec::Deferred); |
| 381 | } |
| 382 | |
| 383 | // Assumed size: (*) |
| 384 | if self.peek() == &TokenKind::Star { |
| 385 | self.advance(); |
| 386 | return Ok(ArraySpec::AssumedSize { lower: None }); |
| 387 | } |
| 388 | |
| 389 | // Explicit or lower:upper |
| 390 | let first = self.parse_expr()?; |
| 391 | if self.eat(&TokenKind::Colon) { |
| 392 | // Could be lower:upper, lower:*, or lower: |
| 393 | if self.peek() == &TokenKind::Star { |
| 394 | self.advance(); |
| 395 | return Ok(ArraySpec::AssumedSize { lower: Some(first) }); |
| 396 | } |
| 397 | if matches!(self.peek(), TokenKind::Comma | TokenKind::RParen) { |
| 398 | return Ok(ArraySpec::AssumedShape { lower: Some(first) }); |
| 399 | } |
| 400 | let upper = self.parse_expr()?; |
| 401 | return Ok(ArraySpec::Explicit { |
| 402 | lower: Some(first), |
| 403 | upper, |
| 404 | }); |
| 405 | } |
| 406 | |
| 407 | // Just an upper bound (lower is 1 implicitly). |
| 408 | Ok(ArraySpec::Explicit { |
| 409 | lower: None, |
| 410 | upper: first, |
| 411 | }) |
| 412 | } |
| 413 | |
| 414 | fn parse_intent_spec(&mut self) -> Result<Intent, ParseError> { |
| 415 | self.expect(&TokenKind::LParen)?; |
| 416 | let text = self.peek_text().to_lowercase(); |
| 417 | let intent = match text.as_str() { |
| 418 | "in" => { |
| 419 | self.advance(); |
| 420 | if self.peek_text().eq_ignore_ascii_case("out") { |
| 421 | self.advance(); |
| 422 | Intent::InOut |
| 423 | } else { |
| 424 | Intent::In |
| 425 | } |
| 426 | } |
| 427 | "out" => { |
| 428 | self.advance(); |
| 429 | Intent::Out |
| 430 | } |
| 431 | "inout" => { |
| 432 | self.advance(); |
| 433 | Intent::InOut |
| 434 | } |
| 435 | _ => { |
| 436 | return Err(self.error(format!( |
| 437 | "expected intent specifier, got {}", |
| 438 | self.peek_text() |
| 439 | ))) |
| 440 | } |
| 441 | }; |
| 442 | self.expect(&TokenKind::RParen)?; |
| 443 | Ok(intent) |
| 444 | } |
| 445 | |
| 446 | fn parse_bind_spec(&mut self) -> Result<Option<String>, ParseError> { |
| 447 | self.expect(&TokenKind::LParen)?; |
| 448 | self.expect_ident_kw("c")?; |
| 449 | let name = if self.eat(&TokenKind::Comma) { |
| 450 | if self.peek_text().eq_ignore_ascii_case("name") { |
| 451 | self.advance(); |
| 452 | self.expect(&TokenKind::Assign)?; |
| 453 | let name_tok = self.advance().clone(); |
| 454 | Some(name_tok.text) |
| 455 | } else { |
| 456 | None |
| 457 | } |
| 458 | } else { |
| 459 | None |
| 460 | }; |
| 461 | self.expect(&TokenKind::RParen)?; |
| 462 | Ok(name) |
| 463 | } |
| 464 | |
| 465 | fn expect_ident_kw(&mut self, name: &str) -> Result<(), ParseError> { |
| 466 | if self.peek_text().eq_ignore_ascii_case(name) { |
| 467 | self.advance(); |
| 468 | Ok(()) |
| 469 | } else { |
| 470 | Err(self.error(format!("expected '{}', got '{}'", name, self.peek_text()))) |
| 471 | } |
| 472 | } |
| 473 | |
| 474 | // ---- Type declaration parsing ---- |
| 475 | |
| 476 | /// Parse a type declaration statement: |
| 477 | /// `type-spec [, attr-list] :: entity-list` |
| 478 | /// or `type-spec entity-list` (old-style, no ::) |
| 479 | pub fn parse_type_decl(&mut self, type_spec: TypeSpec) -> Result<SpannedDecl, ParseError> { |
| 480 | let start = self.current_span(); |
| 481 | |
| 482 | // Parse optional attributes (comma-separated before ::). |
| 483 | let mut attrs = Vec::new(); |
| 484 | while self.eat(&TokenKind::Comma) { |
| 485 | if let Some(attr_result) = self.try_parse_attribute() { |
| 486 | attrs.push(attr_result?); |
| 487 | } else { |
| 488 | break; |
| 489 | } |
| 490 | } |
| 491 | |
| 492 | // Optional :: separator. |
| 493 | let _has_double_colon = self.eat(&TokenKind::ColonColon); |
| 494 | |
| 495 | // Parse entity list. |
| 496 | let entities = self.parse_entity_list()?; |
| 497 | |
| 498 | let span = crate::parser::expr::span_from_to(start, self.prev_span()); |
| 499 | Ok(Spanned::new( |
| 500 | Decl::TypeDecl { |
| 501 | type_spec, |
| 502 | attrs, |
| 503 | entities, |
| 504 | }, |
| 505 | span, |
| 506 | )) |
| 507 | } |
| 508 | |
| 509 | fn parse_entity_list(&mut self) -> Result<Vec<EntityDecl>, ParseError> { |
| 510 | let mut entities = Vec::new(); |
| 511 | loop { |
| 512 | entities.push(self.parse_entity_decl()?); |
| 513 | if !self.eat(&TokenKind::Comma) { |
| 514 | break; |
| 515 | } |
| 516 | } |
| 517 | Ok(entities) |
| 518 | } |
| 519 | |
| 520 | fn parse_entity_decl(&mut self) -> Result<EntityDecl, ParseError> { |
| 521 | if self.peek() != &TokenKind::Identifier { |
| 522 | return Err(self.error(format!("expected entity name, got {}", self.peek()))); |
| 523 | } |
| 524 | let name_tok = self.advance().clone(); |
| 525 | let name = name_tok.text; |
| 526 | |
| 527 | // Optional array spec on the entity: x(10), x(:,:) |
| 528 | let array_spec = if self.peek() == &TokenKind::LParen { |
| 529 | self.advance(); |
| 530 | let specs = self.parse_array_spec_list()?; |
| 531 | self.expect(&TokenKind::RParen)?; |
| 532 | Some(specs) |
| 533 | } else { |
| 534 | None |
| 535 | }; |
| 536 | |
| 537 | if self.peek() == &TokenKind::LBracket { |
| 538 | return Err( |
| 539 | self.error("coarray declarations are recognized but not yet implemented".into()) |
| 540 | ); |
| 541 | } |
| 542 | |
| 543 | // Optional character length: character :: name*20 |
| 544 | let char_len = if self.eat(&TokenKind::Star) { |
| 545 | Some(self.parse_len_spec()?) |
| 546 | } else { |
| 547 | None |
| 548 | }; |
| 549 | |
| 550 | // Initialization: = expr |
| 551 | let init = if self.eat(&TokenKind::Assign) { |
| 552 | Some(self.parse_expr()?) |
| 553 | } else { |
| 554 | None |
| 555 | }; |
| 556 | |
| 557 | // Pointer initialization: => expr |
| 558 | let ptr_init = if self.eat(&TokenKind::Arrow) { |
| 559 | Some(self.parse_expr()?) |
| 560 | } else { |
| 561 | None |
| 562 | }; |
| 563 | |
| 564 | Ok(EntityDecl { |
| 565 | name, |
| 566 | array_spec, |
| 567 | char_len, |
| 568 | init, |
| 569 | ptr_init, |
| 570 | }) |
| 571 | } |
| 572 | |
| 573 | // ---- USE statement ---- |
| 574 | |
| 575 | pub fn parse_use_stmt(&mut self) -> Result<SpannedDecl, ParseError> { |
| 576 | let start = self.current_span(); |
| 577 | // Already consumed 'use'. |
| 578 | |
| 579 | // Handle: use :: mod, use, intrinsic :: mod, use, non_intrinsic :: mod |
| 580 | let mut nature = UseNature::Normal; |
| 581 | |
| 582 | // F2003: use :: module_name (optional :: without nature) |
| 583 | if self.eat(&TokenKind::ColonColon) { |
| 584 | // Just :: with no nature — normal use with explicit :: |
| 585 | } else if self.eat(&TokenKind::Comma) { |
| 586 | let text = self.peek_text().to_lowercase(); |
| 587 | if text == "intrinsic" { |
| 588 | self.advance(); |
| 589 | nature = UseNature::Intrinsic; |
| 590 | self.expect(&TokenKind::ColonColon)?; |
| 591 | } else if text == "non_intrinsic" { |
| 592 | self.advance(); |
| 593 | nature = UseNature::NonIntrinsic; |
| 594 | self.expect(&TokenKind::ColonColon)?; |
| 595 | } |
| 596 | } |
| 597 | |
| 598 | let module = self.advance().clone().text; |
| 599 | |
| 600 | let mut renames = Vec::new(); |
| 601 | let mut only = None; |
| 602 | |
| 603 | if self.eat(&TokenKind::Comma) { |
| 604 | if self.peek_text().eq_ignore_ascii_case("only") { |
| 605 | self.advance(); |
| 606 | self.expect(&TokenKind::Colon)?; |
| 607 | only = Some(self.parse_only_list()?); |
| 608 | } else { |
| 609 | // Rename list: local => remote |
| 610 | renames = self.parse_rename_list()?; |
| 611 | } |
| 612 | } |
| 613 | |
| 614 | let span = crate::parser::expr::span_from_to(start, self.prev_span()); |
| 615 | Ok(Spanned::new( |
| 616 | Decl::UseStmt { |
| 617 | module, |
| 618 | nature, |
| 619 | renames, |
| 620 | only, |
| 621 | }, |
| 622 | span, |
| 623 | )) |
| 624 | } |
| 625 | |
| 626 | fn parse_only_list(&mut self) -> Result<Vec<OnlyItem>, ParseError> { |
| 627 | let mut items = Vec::new(); |
| 628 | if self.at_stmt_end() { |
| 629 | return Ok(items); |
| 630 | } |
| 631 | loop { |
| 632 | let mut name = self.advance().clone().text; |
| 633 | let mut is_generic_spec = false; |
| 634 | if name.eq_ignore_ascii_case("operator") || name.eq_ignore_ascii_case("assignment") { |
| 635 | self.expect(&TokenKind::LParen)?; |
| 636 | let op = self.advance().clone().text; |
| 637 | self.expect(&TokenKind::RParen)?; |
| 638 | name = format!("{}({})", name, op); |
| 639 | is_generic_spec = true; |
| 640 | } else if (name.eq_ignore_ascii_case("read") || name.eq_ignore_ascii_case("write")) |
| 641 | && self.peek() == &TokenKind::LParen |
| 642 | { |
| 643 | // F2018 §12.6.4.8: defined-IO generic-spec — `read (formatted)`, |
| 644 | // `read (unformatted)`, `write (formatted)`, `write (unformatted)`. |
| 645 | // Stored as a single OnlyItem::Generic so module resolution can |
| 646 | // import the corresponding INTERFACE READ/WRITE binding. |
| 647 | self.advance(); |
| 648 | let kind = self.advance().clone().text; |
| 649 | self.expect(&TokenKind::RParen)?; |
| 650 | name = format!( |
| 651 | "{}({})", |
| 652 | name.to_ascii_lowercase(), |
| 653 | kind.to_ascii_lowercase() |
| 654 | ); |
| 655 | is_generic_spec = true; |
| 656 | } |
| 657 | if self.eat(&TokenKind::Arrow) { |
| 658 | let remote = self.advance().clone().text; |
| 659 | items.push(OnlyItem::Rename(Rename { |
| 660 | local: name, |
| 661 | remote, |
| 662 | })); |
| 663 | } else if is_generic_spec |
| 664 | || name.eq_ignore_ascii_case("operator(+)") |
| 665 | || name.eq_ignore_ascii_case("operator(-)") |
| 666 | || name.eq_ignore_ascii_case("operator(*)") |
| 667 | || name.eq_ignore_ascii_case("operator(/)") |
| 668 | || name.eq_ignore_ascii_case("operator(**)") |
| 669 | || name.eq_ignore_ascii_case("operator(//)") |
| 670 | || name.eq_ignore_ascii_case("operator(==)") |
| 671 | || name.eq_ignore_ascii_case("operator(/=)") |
| 672 | || name.eq_ignore_ascii_case("operator(<)") |
| 673 | || name.eq_ignore_ascii_case("operator(<=)") |
| 674 | || name.eq_ignore_ascii_case("operator(>)") |
| 675 | || name.eq_ignore_ascii_case("operator(>=)") |
| 676 | || name.eq_ignore_ascii_case("assignment(=)") |
| 677 | { |
| 678 | items.push(OnlyItem::Generic(name)); |
| 679 | } else { |
| 680 | items.push(OnlyItem::Name(name)); |
| 681 | } |
| 682 | if !self.eat(&TokenKind::Comma) { |
| 683 | break; |
| 684 | } |
| 685 | } |
| 686 | Ok(items) |
| 687 | } |
| 688 | |
| 689 | fn parse_rename_list(&mut self) -> Result<Vec<Rename>, ParseError> { |
| 690 | let mut renames = Vec::new(); |
| 691 | loop { |
| 692 | let local = self.advance().clone().text; |
| 693 | self.expect(&TokenKind::Arrow)?; |
| 694 | let remote = self.advance().clone().text; |
| 695 | renames.push(Rename { local, remote }); |
| 696 | if !self.eat(&TokenKind::Comma) { |
| 697 | break; |
| 698 | } |
| 699 | } |
| 700 | Ok(renames) |
| 701 | } |
| 702 | |
| 703 | // ---- IMPLICIT ---- |
| 704 | |
| 705 | pub fn parse_implicit(&mut self) -> Result<SpannedDecl, ParseError> { |
| 706 | let start = self.current_span(); |
| 707 | // Already consumed 'implicit'. |
| 708 | |
| 709 | if self.peek_text().eq_ignore_ascii_case("none") { |
| 710 | self.advance(); |
| 711 | // Check for (type) or (external) or (type, external) |
| 712 | let mut type_ = true; |
| 713 | let mut external = false; |
| 714 | if self.peek() == &TokenKind::LParen { |
| 715 | self.advance(); |
| 716 | type_ = false; |
| 717 | loop { |
| 718 | let spec = self.peek_text().to_lowercase(); |
| 719 | match spec.as_str() { |
| 720 | "type" => { |
| 721 | self.advance(); |
| 722 | type_ = true; |
| 723 | } |
| 724 | "external" => { |
| 725 | self.advance(); |
| 726 | external = true; |
| 727 | } |
| 728 | _ => break, |
| 729 | } |
| 730 | if !self.eat(&TokenKind::Comma) { |
| 731 | break; |
| 732 | } |
| 733 | } |
| 734 | self.expect(&TokenKind::RParen)?; |
| 735 | } |
| 736 | let span = crate::parser::expr::span_from_to(start, self.prev_span()); |
| 737 | return Ok(Spanned::new(Decl::ImplicitNone { external, type_ }, span)); |
| 738 | } |
| 739 | |
| 740 | // IMPLICIT type-spec (letter-range-list) |
| 741 | // Note: we parse the type keyword WITHOUT its kind selector, because |
| 742 | // the parenthesized part after the type keyword is the letter range, |
| 743 | // not a kind selector. E.g., "implicit integer (i-n)" — the (i-n) |
| 744 | // is a letter range, not kind=i-n. |
| 745 | let mut specs = Vec::new(); |
| 746 | loop { |
| 747 | let type_spec = self |
| 748 | .parse_implicit_type_spec() |
| 749 | .ok_or_else(|| self.error("expected type specifier in IMPLICIT".into()))??; |
| 750 | self.expect(&TokenKind::LParen)?; |
| 751 | let mut ranges = Vec::new(); |
| 752 | loop { |
| 753 | let start_letter = self.advance().clone().text.chars().next().unwrap_or('a'); |
| 754 | self.expect(&TokenKind::Minus)?; |
| 755 | let end_letter = self.advance().clone().text.chars().next().unwrap_or('z'); |
| 756 | ranges.push((start_letter, end_letter)); |
| 757 | if !self.eat(&TokenKind::Comma) { |
| 758 | break; |
| 759 | } |
| 760 | } |
| 761 | self.expect(&TokenKind::RParen)?; |
| 762 | specs.push(ImplicitSpec { type_spec, ranges }); |
| 763 | if !self.eat(&TokenKind::Comma) { |
| 764 | break; |
| 765 | } |
| 766 | } |
| 767 | |
| 768 | let span = crate::parser::expr::span_from_to(start, self.prev_span()); |
| 769 | Ok(Spanned::new(Decl::ImplicitStmt { specs }, span)) |
| 770 | } |
| 771 | |
| 772 | // ---- Derived type definition ---- |
| 773 | |
| 774 | pub fn parse_derived_type_def(&mut self) -> Result<SpannedDecl, ParseError> { |
| 775 | let start = self.current_span(); |
| 776 | // Already consumed 'type'. Next could be :: or , attrs. |
| 777 | |
| 778 | let mut attrs = Vec::new(); |
| 779 | |
| 780 | // Parse type attributes: abstract, bind(c), extends(parent), public, private |
| 781 | while self.eat(&TokenKind::Comma) { |
| 782 | let text = self.peek_text().to_lowercase(); |
| 783 | match text.as_str() { |
| 784 | "abstract" => { |
| 785 | self.advance(); |
| 786 | attrs.push(TypeAttr::Abstract); |
| 787 | } |
| 788 | "public" => { |
| 789 | self.advance(); |
| 790 | attrs.push(TypeAttr::Public); |
| 791 | } |
| 792 | "private" => { |
| 793 | self.advance(); |
| 794 | attrs.push(TypeAttr::Private); |
| 795 | } |
| 796 | "bind" => { |
| 797 | self.advance(); |
| 798 | let name = self.parse_bind_spec()?; |
| 799 | attrs.push(TypeAttr::Bind(name)); |
| 800 | } |
| 801 | "extends" => { |
| 802 | self.advance(); |
| 803 | self.expect(&TokenKind::LParen)?; |
| 804 | let parent = self.advance().clone().text; |
| 805 | self.expect(&TokenKind::RParen)?; |
| 806 | attrs.push(TypeAttr::Extends(parent)); |
| 807 | } |
| 808 | _ => break, |
| 809 | } |
| 810 | } |
| 811 | |
| 812 | self.eat(&TokenKind::ColonColon); |
| 813 | let name = self.advance().clone().text; |
| 814 | self.skip_newlines(); |
| 815 | |
| 816 | // Parse components until 'contains' or 'end type'. |
| 817 | let mut components = Vec::new(); |
| 818 | let mut type_bound_procs = Vec::new(); |
| 819 | let mut final_procs = Vec::new(); |
| 820 | |
| 821 | loop { |
| 822 | self.skip_newlines(); |
| 823 | let text = self.peek_text().to_lowercase(); |
| 824 | |
| 825 | if text == "contains" { |
| 826 | self.advance(); |
| 827 | self.skip_newlines(); |
| 828 | // Parse type-bound procedures until 'end type'. |
| 829 | loop { |
| 830 | self.skip_newlines(); |
| 831 | let proc_text = self.peek_text().to_lowercase(); |
| 832 | if proc_text == "end" { |
| 833 | break; |
| 834 | } |
| 835 | if proc_text == "endtype" { |
| 836 | break; |
| 837 | } |
| 838 | |
| 839 | if proc_text == "procedure" { |
| 840 | self.advance(); |
| 841 | let tbp = self.parse_type_bound_proc()?; |
| 842 | type_bound_procs.push(tbp); |
| 843 | } else if proc_text == "generic" { |
| 844 | self.advance(); |
| 845 | let tbp = self.parse_type_bound_proc_generic()?; |
| 846 | type_bound_procs.push(tbp); |
| 847 | } else if proc_text == "final" { |
| 848 | self.advance(); |
| 849 | self.eat(&TokenKind::ColonColon); |
| 850 | let name = self.advance().clone().text; |
| 851 | final_procs.push(name); |
| 852 | } else { |
| 853 | // Skip unknown lines in contains section. |
| 854 | while !self.at_stmt_end() { |
| 855 | self.advance(); |
| 856 | } |
| 857 | } |
| 858 | self.skip_newlines(); |
| 859 | } |
| 860 | break; |
| 861 | } |
| 862 | |
| 863 | if text == "end" || text == "endtype" { |
| 864 | break; |
| 865 | } |
| 866 | |
| 867 | // PROCEDURE(interface_name) [, attrs] :: name [=> null()] |
| 868 | // Procedure pointer components inside a derived type. |
| 869 | if text == "procedure" { |
| 870 | let next_pos = self.pos + 1; |
| 871 | if next_pos < self.tokens.len() && self.tokens[next_pos].kind == TokenKind::LParen { |
| 872 | let comp_start = self.current_span(); |
| 873 | self.advance(); // consume 'procedure' |
| 874 | self.advance(); // consume '(' |
| 875 | let iface_name = if self.peek() == &TokenKind::Identifier { |
| 876 | self.advance().clone().text |
| 877 | } else { |
| 878 | String::new() |
| 879 | }; |
| 880 | self.expect(&TokenKind::RParen)?; |
| 881 | |
| 882 | let mut comp_attrs = Vec::new(); |
| 883 | while self.eat(&TokenKind::Comma) { |
| 884 | let attr_text = self.peek_text().to_lowercase(); |
| 885 | match attr_text.as_str() { |
| 886 | "pointer" => { |
| 887 | self.advance(); |
| 888 | comp_attrs.push(crate::ast::decl::Attribute::Pointer); |
| 889 | } |
| 890 | "nopass" | "pass" | "deferred" | "non_overridable" => { |
| 891 | self.advance(); |
| 892 | } |
| 893 | _ => { |
| 894 | self.advance(); |
| 895 | } |
| 896 | } |
| 897 | } |
| 898 | |
| 899 | if self.peek() == &TokenKind::ColonColon { |
| 900 | self.advance(); |
| 901 | } |
| 902 | |
| 903 | let mut entities = Vec::new(); |
| 904 | loop { |
| 905 | let entity_name = if self.peek() == &TokenKind::Identifier { |
| 906 | self.advance().clone().text |
| 907 | } else { |
| 908 | String::new() |
| 909 | }; |
| 910 | |
| 911 | // F2008 §4.5.4.5: a procedure pointer |
| 912 | // component may carry a default initial |
| 913 | // association `=> proc_name` or `=> null()`. |
| 914 | // Without capturing the right-hand side the |
| 915 | // pointer field stays uninitialized — calling |
| 916 | // `instance%fn(args)` then jumps through |
| 917 | // garbage memory. stdlib_hashmaps's |
| 918 | // `procedure(hasher_fun), pointer, nopass :: |
| 919 | // hasher => default_hasher` motivated this fix. |
| 920 | let mut ptr_init: Option<crate::ast::expr::SpannedExpr> = None; |
| 921 | if self.eat(&TokenKind::Arrow) { |
| 922 | let init_start = self.current_span(); |
| 923 | if self.peek_text().eq_ignore_ascii_case("null") { |
| 924 | self.advance(); |
| 925 | if self.peek() == &TokenKind::LParen { |
| 926 | self.advance(); |
| 927 | let _ = self.expect(&TokenKind::RParen); |
| 928 | } |
| 929 | // Leave ptr_init as None for `=> null()` |
| 930 | // (matches the legacy behaviour, where |
| 931 | // the field is zero-initialised). |
| 932 | } else if self.peek() == &TokenKind::Identifier { |
| 933 | let target_name = self.advance().clone().text; |
| 934 | let span = |
| 935 | crate::parser::expr::span_from_to(init_start, self.prev_span()); |
| 936 | ptr_init = Some(crate::ast::Spanned::new( |
| 937 | crate::ast::expr::Expr::Name { name: target_name }, |
| 938 | span, |
| 939 | )); |
| 940 | } |
| 941 | } |
| 942 | |
| 943 | entities.push(crate::ast::decl::EntityDecl { |
| 944 | name: entity_name, |
| 945 | array_spec: None, |
| 946 | init: None, |
| 947 | char_len: None, |
| 948 | ptr_init, |
| 949 | }); |
| 950 | |
| 951 | if !self.eat(&TokenKind::Comma) { |
| 952 | break; |
| 953 | } |
| 954 | } |
| 955 | |
| 956 | comp_attrs.push(crate::ast::decl::Attribute::External); |
| 957 | let span = crate::parser::expr::span_from_to(comp_start, self.prev_span()); |
| 958 | components.push(crate::ast::Spanned::new( |
| 959 | crate::ast::decl::Decl::TypeDecl { |
| 960 | type_spec: crate::ast::decl::TypeSpec::Type(iface_name), |
| 961 | attrs: comp_attrs, |
| 962 | entities, |
| 963 | }, |
| 964 | span, |
| 965 | )); |
| 966 | continue; |
| 967 | } |
| 968 | } |
| 969 | |
| 970 | // Try to parse a component declaration. |
| 971 | if let Some(ts_result) = self.try_parse_type_spec() { |
| 972 | let ts = ts_result?; |
| 973 | let comp = self.parse_type_decl(ts)?; |
| 974 | components.push(comp); |
| 975 | } else { |
| 976 | // Skip unrecognized lines. |
| 977 | while !self.at_stmt_end() { |
| 978 | self.advance(); |
| 979 | } |
| 980 | self.skip_newlines(); |
| 981 | } |
| 982 | } |
| 983 | |
| 984 | // Consume 'end type [name]'. |
| 985 | if self.peek_text().eq_ignore_ascii_case("endtype") { |
| 986 | self.advance(); |
| 987 | } else if self.peek_text().eq_ignore_ascii_case("end") { |
| 988 | self.advance(); |
| 989 | self.eat_ident("type"); |
| 990 | } |
| 991 | // Optional name after end type. |
| 992 | if self.peek() == &TokenKind::Identifier { |
| 993 | self.advance(); |
| 994 | } |
| 995 | |
| 996 | let extends = attrs.iter().find_map(|a| { |
| 997 | if let TypeAttr::Extends(ref p) = a { |
| 998 | Some(p.clone()) |
| 999 | } else { |
| 1000 | None |
| 1001 | } |
| 1002 | }); |
| 1003 | |
| 1004 | let span = crate::parser::expr::span_from_to(start, self.prev_span()); |
| 1005 | Ok(Spanned::new( |
| 1006 | Decl::DerivedTypeDef { |
| 1007 | name, |
| 1008 | extends, |
| 1009 | attrs, |
| 1010 | components, |
| 1011 | type_bound_procs, |
| 1012 | final_procs, |
| 1013 | }, |
| 1014 | span, |
| 1015 | )) |
| 1016 | } |
| 1017 | |
| 1018 | fn parse_type_bound_proc(&mut self) -> Result<TypeBoundProc, ParseError> { |
| 1019 | // procedure [(iface)] [, attrs] :: name [=> binding] |
| 1020 | let interface = if self.eat(&TokenKind::LParen) { |
| 1021 | let iface = self.advance().clone().text; |
| 1022 | self.expect(&TokenKind::RParen)?; |
| 1023 | Some(iface) |
| 1024 | } else { |
| 1025 | None |
| 1026 | }; |
| 1027 | let mut proc_attrs = Vec::new(); |
| 1028 | while self.eat(&TokenKind::Comma) { |
| 1029 | let text = self.peek_text().to_lowercase(); |
| 1030 | match text.as_str() { |
| 1031 | "pass" => { |
| 1032 | proc_attrs.push(self.advance().clone().text); |
| 1033 | // Optional argument: pass(arg). Consume balanced parens |
| 1034 | // — we don't track which arg the pass is on; F2018 says |
| 1035 | // it defaults to the first dummy if not specified. |
| 1036 | if self.peek() == &TokenKind::LParen { |
| 1037 | let mut depth = 0; |
| 1038 | loop { |
| 1039 | match self.peek() { |
| 1040 | TokenKind::LParen => { |
| 1041 | self.advance(); |
| 1042 | depth += 1; |
| 1043 | } |
| 1044 | TokenKind::RParen => { |
| 1045 | self.advance(); |
| 1046 | depth -= 1; |
| 1047 | if depth == 0 { |
| 1048 | break; |
| 1049 | } |
| 1050 | } |
| 1051 | TokenKind::Eof => break, |
| 1052 | _ => { |
| 1053 | self.advance(); |
| 1054 | } |
| 1055 | } |
| 1056 | } |
| 1057 | } |
| 1058 | } |
| 1059 | "nopass" | "deferred" | "non_overridable" | "public" | "private" => { |
| 1060 | proc_attrs.push(self.advance().clone().text); |
| 1061 | } |
| 1062 | _ => break, |
| 1063 | } |
| 1064 | } |
| 1065 | self.eat(&TokenKind::ColonColon); |
| 1066 | let name = self.advance().clone().text; |
| 1067 | let binding = if self.eat(&TokenKind::Arrow) { |
| 1068 | Some(self.advance().clone().text) |
| 1069 | } else { |
| 1070 | None |
| 1071 | }; |
| 1072 | let bindings = binding.iter().cloned().collect(); |
| 1073 | Ok(TypeBoundProc { |
| 1074 | name, |
| 1075 | interface, |
| 1076 | binding, |
| 1077 | bindings, |
| 1078 | attrs: proc_attrs, |
| 1079 | is_generic: false, |
| 1080 | }) |
| 1081 | } |
| 1082 | |
| 1083 | fn parse_type_bound_proc_generic(&mut self) -> Result<TypeBoundProc, ParseError> { |
| 1084 | // generic [, attrs] :: name => specific_name [, specific_name ...] |
| 1085 | // or generic [, attrs] :: operator(+) => specific_name |
| 1086 | // F2018 §4.5.5: access-spec (PUBLIC/PRIVATE) may appear after the |
| 1087 | // GENERIC keyword as a comma-separated attribute. The non-generic |
| 1088 | // parser already handles this for ordinary procedure bindings; the |
| 1089 | // generic parser was skipping it, so `generic, public :: name => ...` |
| 1090 | // mis-parsed name as `,` and dropped every binding. |
| 1091 | let mut proc_attrs = Vec::new(); |
| 1092 | while self.eat(&TokenKind::Comma) { |
| 1093 | let text = self.peek_text().to_lowercase(); |
| 1094 | match text.as_str() { |
| 1095 | "public" | "private" => { |
| 1096 | proc_attrs.push(self.advance().clone().text); |
| 1097 | } |
| 1098 | _ => break, |
| 1099 | } |
| 1100 | } |
| 1101 | self.eat(&TokenKind::ColonColon); |
| 1102 | let mut name = self.advance().clone().text; |
| 1103 | // Handle operator(...) form. |
| 1104 | if name.eq_ignore_ascii_case("operator") || name.eq_ignore_ascii_case("assignment") { |
| 1105 | self.expect(&TokenKind::LParen)?; |
| 1106 | let op = self.advance().clone().text; |
| 1107 | self.expect(&TokenKind::RParen)?; |
| 1108 | name = format!("{}({})", name, op); |
| 1109 | } |
| 1110 | let mut bindings = Vec::new(); |
| 1111 | if self.eat(&TokenKind::Arrow) { |
| 1112 | bindings.push(self.advance().clone().text); |
| 1113 | while self.eat(&TokenKind::Comma) { |
| 1114 | bindings.push(self.advance().clone().text); |
| 1115 | } |
| 1116 | } |
| 1117 | let binding = bindings.first().cloned(); |
| 1118 | Ok(TypeBoundProc { |
| 1119 | name, |
| 1120 | interface: None, |
| 1121 | binding, |
| 1122 | bindings, |
| 1123 | attrs: proc_attrs, |
| 1124 | is_generic: true, |
| 1125 | }) |
| 1126 | } |
| 1127 | |
| 1128 | // ---- PARAMETER, COMMON, EQUIVALENCE, DATA ---- |
| 1129 | |
| 1130 | pub fn parse_parameter_stmt(&mut self) -> Result<SpannedDecl, ParseError> { |
| 1131 | let start = self.current_span(); |
| 1132 | // Already consumed 'parameter'. Expect (name=expr, ...) |
| 1133 | self.expect(&TokenKind::LParen)?; |
| 1134 | let mut pairs = Vec::new(); |
| 1135 | loop { |
| 1136 | let name = self.advance().clone().text; |
| 1137 | self.expect(&TokenKind::Assign)?; |
| 1138 | let value = self.parse_expr()?; |
| 1139 | pairs.push((name, value)); |
| 1140 | if !self.eat(&TokenKind::Comma) { |
| 1141 | break; |
| 1142 | } |
| 1143 | } |
| 1144 | self.expect(&TokenKind::RParen)?; |
| 1145 | let span = crate::parser::expr::span_from_to(start, self.prev_span()); |
| 1146 | Ok(Spanned::new(Decl::ParameterStmt { pairs }, span)) |
| 1147 | } |
| 1148 | |
| 1149 | pub fn parse_common_block(&mut self) -> Result<SpannedDecl, ParseError> { |
| 1150 | let start = self.current_span(); |
| 1151 | // Already consumed 'common'. Expect /name/ var-list. |
| 1152 | let name = if self.eat(&TokenKind::Slash) { |
| 1153 | let n = self.advance().clone().text; |
| 1154 | self.expect(&TokenKind::Slash)?; |
| 1155 | Some(n) |
| 1156 | } else { |
| 1157 | None |
| 1158 | }; |
| 1159 | let mut vars = Vec::new(); |
| 1160 | loop { |
| 1161 | vars.push(self.advance().clone().text); |
| 1162 | if !self.eat(&TokenKind::Comma) { |
| 1163 | break; |
| 1164 | } |
| 1165 | } |
| 1166 | let span = crate::parser::expr::span_from_to(start, self.prev_span()); |
| 1167 | Ok(Spanned::new(Decl::CommonBlock { name, vars }, span)) |
| 1168 | } |
| 1169 | |
| 1170 | pub fn parse_data_stmt(&mut self) -> Result<SpannedDecl, ParseError> { |
| 1171 | use crate::parser::expr::BP_MUL; |
| 1172 | let start = self.current_span(); |
| 1173 | // Already consumed 'data'. Format: obj-list /value-list/ [, obj-list /value-list/] |
| 1174 | // Note: / delimiters conflict with division operator. We parse expressions |
| 1175 | // at a binding power that excludes * and / to prevent consuming the delimiter. |
| 1176 | let mut sets = Vec::new(); |
| 1177 | loop { |
| 1178 | let mut objects = Vec::new(); |
| 1179 | while self.peek() != &TokenKind::Slash { |
| 1180 | objects.push(self.parse_expr_bp(BP_MUL.right)?); |
| 1181 | if !self.eat(&TokenKind::Comma) { |
| 1182 | break; |
| 1183 | } |
| 1184 | } |
| 1185 | self.expect(&TokenKind::Slash)?; |
| 1186 | let mut values = Vec::new(); |
| 1187 | while self.peek() != &TokenKind::Slash { |
| 1188 | values.push(self.parse_expr_bp(BP_MUL.right)?); |
| 1189 | if !self.eat(&TokenKind::Comma) { |
| 1190 | break; |
| 1191 | } |
| 1192 | } |
| 1193 | self.expect(&TokenKind::Slash)?; |
| 1194 | sets.push(DataSet { objects, values }); |
| 1195 | if !self.eat(&TokenKind::Comma) { |
| 1196 | break; |
| 1197 | } |
| 1198 | // Check if next batch starts or if we're at end of statement. |
| 1199 | if self.at_stmt_end() { |
| 1200 | break; |
| 1201 | } |
| 1202 | } |
| 1203 | let span = crate::parser::expr::span_from_to(start, self.prev_span()); |
| 1204 | Ok(Spanned::new(Decl::DataStmt { sets }, span)) |
| 1205 | } |
| 1206 | |
| 1207 | pub fn parse_equivalence_stmt(&mut self) -> Result<SpannedDecl, ParseError> { |
| 1208 | let start = self.current_span(); |
| 1209 | // Already consumed 'equivalence'. Format: (var-list), (var-list), ... |
| 1210 | let mut groups = Vec::new(); |
| 1211 | loop { |
| 1212 | self.expect(&TokenKind::LParen)?; |
| 1213 | let mut group = Vec::new(); |
| 1214 | loop { |
| 1215 | group.push(self.parse_expr()?); |
| 1216 | if !self.eat(&TokenKind::Comma) { |
| 1217 | break; |
| 1218 | } |
| 1219 | } |
| 1220 | self.expect(&TokenKind::RParen)?; |
| 1221 | groups.push(group); |
| 1222 | if !self.eat(&TokenKind::Comma) { |
| 1223 | break; |
| 1224 | } |
| 1225 | } |
| 1226 | let span = crate::parser::expr::span_from_to(start, self.prev_span()); |
| 1227 | Ok(Spanned::new(Decl::EquivalenceStmt { groups }, span)) |
| 1228 | } |
| 1229 | |
| 1230 | pub fn parse_enum_def(&mut self) -> Result<SpannedDecl, ParseError> { |
| 1231 | let start = self.current_span(); |
| 1232 | self.advance(); // consume ENUM |
| 1233 | |
| 1234 | if self.eat(&TokenKind::Comma) { |
| 1235 | if !self.eat_ident("bind") { |
| 1236 | return Err(self.error("expected BIND(C) after ENUM,".into())); |
| 1237 | } |
| 1238 | self.expect(&TokenKind::LParen)?; |
| 1239 | if !self.eat_ident("c") { |
| 1240 | return Err(self.error("expected BIND(C) after ENUM,".into())); |
| 1241 | } |
| 1242 | self.expect(&TokenKind::RParen)?; |
| 1243 | } |
| 1244 | |
| 1245 | self.skip_newlines(); |
| 1246 | let mut enumerators = Vec::new(); |
| 1247 | loop { |
| 1248 | self.skip_newlines(); |
| 1249 | let text = self.peek_text().to_lowercase(); |
| 1250 | if text == "end" || text == "endenum" { |
| 1251 | break; |
| 1252 | } |
| 1253 | if text != "enumerator" { |
| 1254 | return Err(self.error(format!( |
| 1255 | "expected ENUMERATOR or end enum, got '{}'", |
| 1256 | self.peek_text() |
| 1257 | ))); |
| 1258 | } |
| 1259 | self.advance(); // consume ENUMERATOR |
| 1260 | self.eat(&TokenKind::ColonColon); |
| 1261 | loop { |
| 1262 | if self.peek() != &TokenKind::Identifier { |
| 1263 | return Err(self.error("expected enumerator name".into())); |
| 1264 | } |
| 1265 | let name = self.advance().clone().text; |
| 1266 | let value = if self.eat(&TokenKind::Assign) { |
| 1267 | Some(self.parse_expr()?) |
| 1268 | } else { |
| 1269 | None |
| 1270 | }; |
| 1271 | enumerators.push((name, value)); |
| 1272 | if !self.eat(&TokenKind::Comma) { |
| 1273 | break; |
| 1274 | } |
| 1275 | } |
| 1276 | self.skip_newlines(); |
| 1277 | } |
| 1278 | |
| 1279 | self.consume_end("enum")?; |
| 1280 | let span = crate::parser::expr::span_from_to(start, self.prev_span()); |
| 1281 | Ok(Spanned::new(Decl::EnumDef { enumerators }, span)) |
| 1282 | } |
| 1283 | } |
| 1284 | |
| 1285 | #[cfg(test)] |
| 1286 | mod tests { |
| 1287 | use super::*; |
| 1288 | use crate::lexer::Lexer; |
| 1289 | |
| 1290 | fn parse_decl(src: &str) -> SpannedDecl { |
| 1291 | let tokens = Lexer::tokenize(src, 0).unwrap(); |
| 1292 | let mut parser = Parser::new(&tokens); |
| 1293 | |
| 1294 | // Try type specifier first. |
| 1295 | if let Some(ts_result) = parser.try_parse_type_spec() { |
| 1296 | let ts = ts_result.unwrap(); |
| 1297 | return parser.parse_type_decl(ts).unwrap(); |
| 1298 | } |
| 1299 | |
| 1300 | // Try USE. |
| 1301 | if parser.peek_text().eq_ignore_ascii_case("use") { |
| 1302 | parser.advance(); |
| 1303 | return parser.parse_use_stmt().unwrap(); |
| 1304 | } |
| 1305 | |
| 1306 | // Try IMPLICIT. |
| 1307 | if parser.peek_text().eq_ignore_ascii_case("implicit") { |
| 1308 | parser.advance(); |
| 1309 | return parser.parse_implicit().unwrap(); |
| 1310 | } |
| 1311 | |
| 1312 | // Try PARAMETER. |
| 1313 | if parser.peek_text().eq_ignore_ascii_case("parameter") { |
| 1314 | parser.advance(); |
| 1315 | return parser.parse_parameter_stmt().unwrap(); |
| 1316 | } |
| 1317 | |
| 1318 | // Try COMMON. |
| 1319 | if parser.peek_text().eq_ignore_ascii_case("common") { |
| 1320 | parser.advance(); |
| 1321 | return parser.parse_common_block().unwrap(); |
| 1322 | } |
| 1323 | |
| 1324 | // Try DATA. |
| 1325 | if parser.peek_text().eq_ignore_ascii_case("data") { |
| 1326 | parser.advance(); |
| 1327 | return parser.parse_data_stmt().unwrap(); |
| 1328 | } |
| 1329 | |
| 1330 | // Try EQUIVALENCE. |
| 1331 | if parser.peek_text().eq_ignore_ascii_case("equivalence") { |
| 1332 | parser.advance(); |
| 1333 | return parser.parse_equivalence_stmt().unwrap(); |
| 1334 | } |
| 1335 | |
| 1336 | // Try ENUM. |
| 1337 | if parser.peek_text().eq_ignore_ascii_case("enum") { |
| 1338 | return parser.parse_enum_def().unwrap(); |
| 1339 | } |
| 1340 | |
| 1341 | panic!("could not parse as declaration: {}", src); |
| 1342 | } |
| 1343 | |
| 1344 | // ---- Type declarations ---- |
| 1345 | |
| 1346 | #[test] |
| 1347 | fn integer_simple() { |
| 1348 | let d = parse_decl("integer :: x, y, z"); |
| 1349 | if let Decl::TypeDecl { |
| 1350 | type_spec, |
| 1351 | entities, |
| 1352 | .. |
| 1353 | } = &d.node |
| 1354 | { |
| 1355 | assert!(matches!(type_spec, TypeSpec::Integer(None))); |
| 1356 | assert_eq!(entities.len(), 3); |
| 1357 | assert_eq!(entities[0].name, "x"); |
| 1358 | } else { |
| 1359 | panic!("not TypeDecl"); |
| 1360 | } |
| 1361 | } |
| 1362 | |
| 1363 | #[test] |
| 1364 | fn integer_with_init() { |
| 1365 | let d = parse_decl("integer :: x = 0, y = 1"); |
| 1366 | if let Decl::TypeDecl { entities, .. } = &d.node { |
| 1367 | assert!(entities[0].init.is_some()); |
| 1368 | assert!(entities[1].init.is_some()); |
| 1369 | } else { |
| 1370 | panic!("not TypeDecl"); |
| 1371 | } |
| 1372 | } |
| 1373 | |
| 1374 | #[test] |
| 1375 | fn integer_with_kind() { |
| 1376 | let d = parse_decl("integer(8) :: x"); |
| 1377 | if let Decl::TypeDecl { type_spec, .. } = &d.node { |
| 1378 | assert!(matches!(type_spec, TypeSpec::Integer(Some(_)))); |
| 1379 | } else { |
| 1380 | panic!("not TypeDecl"); |
| 1381 | } |
| 1382 | } |
| 1383 | |
| 1384 | #[test] |
| 1385 | fn type_bound_proc_with_interface_spec_preserves_method_name() { |
| 1386 | let tokens = Lexer::tokenize("procedure(push_iface), deferred :: push", 0).unwrap(); |
| 1387 | let mut parser = Parser::new(&tokens); |
| 1388 | parser.advance(); |
| 1389 | let tbp = parser.parse_type_bound_proc().unwrap(); |
| 1390 | assert_eq!(tbp.name, "push"); |
| 1391 | assert_eq!(tbp.interface.as_deref(), Some("push_iface")); |
| 1392 | assert!(tbp.binding.is_none()); |
| 1393 | assert!(tbp.bindings.is_empty()); |
| 1394 | assert_eq!(tbp.attrs, vec!["deferred"]); |
| 1395 | } |
| 1396 | |
| 1397 | #[test] |
| 1398 | fn generic_type_bound_proc_preserves_all_specific_bindings() { |
| 1399 | let tokens = |
| 1400 | Lexer::tokenize("generic :: set => set_float, set_integer, set_datetime", 0).unwrap(); |
| 1401 | let mut parser = Parser::new(&tokens); |
| 1402 | parser.advance(); |
| 1403 | let tbp = parser.parse_type_bound_proc_generic().unwrap(); |
| 1404 | assert_eq!(tbp.name, "set"); |
| 1405 | assert_eq!(tbp.binding.as_deref(), Some("set_float")); |
| 1406 | assert_eq!( |
| 1407 | tbp.bindings, |
| 1408 | vec![ |
| 1409 | "set_float".to_string(), |
| 1410 | "set_integer".to_string(), |
| 1411 | "set_datetime".to_string() |
| 1412 | ] |
| 1413 | ); |
| 1414 | assert!(tbp.is_generic); |
| 1415 | } |
| 1416 | |
| 1417 | #[test] |
| 1418 | fn real_allocatable() { |
| 1419 | let d = parse_decl("real(8), allocatable :: matrix(:,:)"); |
| 1420 | if let Decl::TypeDecl { |
| 1421 | type_spec, |
| 1422 | attrs, |
| 1423 | entities, |
| 1424 | } = &d.node |
| 1425 | { |
| 1426 | assert!(matches!(type_spec, TypeSpec::Real(Some(_)))); |
| 1427 | assert!(attrs.contains(&Attribute::Allocatable)); |
| 1428 | assert!(entities[0].array_spec.is_some()); |
| 1429 | } else { |
| 1430 | panic!("not TypeDecl"); |
| 1431 | } |
| 1432 | } |
| 1433 | |
| 1434 | #[test] |
| 1435 | fn character_deferred_length() { |
| 1436 | let d = parse_decl("character(len=:), allocatable :: name"); |
| 1437 | if let Decl::TypeDecl { |
| 1438 | type_spec, attrs, .. |
| 1439 | } = &d.node |
| 1440 | { |
| 1441 | if let TypeSpec::Character(Some(cs)) = type_spec { |
| 1442 | assert!(matches!(cs.len, Some(LenSpec::Colon))); |
| 1443 | } else { |
| 1444 | panic!("not character type"); |
| 1445 | } |
| 1446 | assert!(attrs.contains(&Attribute::Allocatable)); |
| 1447 | } else { |
| 1448 | panic!("not TypeDecl"); |
| 1449 | } |
| 1450 | } |
| 1451 | |
| 1452 | #[test] |
| 1453 | fn character_assumed_length() { |
| 1454 | let d = parse_decl("character(len=*), intent(in) :: input"); |
| 1455 | if let Decl::TypeDecl { |
| 1456 | type_spec, attrs, .. |
| 1457 | } = &d.node |
| 1458 | { |
| 1459 | if let TypeSpec::Character(Some(cs)) = type_spec { |
| 1460 | assert!(matches!(cs.len, Some(LenSpec::Star))); |
| 1461 | } else { |
| 1462 | panic!("not character type"); |
| 1463 | } |
| 1464 | assert!(attrs |
| 1465 | .iter() |
| 1466 | .any(|a| matches!(a, Attribute::Intent(Intent::In)))); |
| 1467 | } else { |
| 1468 | panic!("not TypeDecl"); |
| 1469 | } |
| 1470 | } |
| 1471 | |
| 1472 | #[test] |
| 1473 | fn type_derived() { |
| 1474 | let d = parse_decl("type(my_type) :: obj"); |
| 1475 | if let Decl::TypeDecl { type_spec, .. } = &d.node { |
| 1476 | assert!(matches!(type_spec, TypeSpec::Type(ref n) if n == "my_type")); |
| 1477 | } else { |
| 1478 | panic!("not TypeDecl"); |
| 1479 | } |
| 1480 | } |
| 1481 | |
| 1482 | #[test] |
| 1483 | fn class_star() { |
| 1484 | let d = parse_decl("class(*) :: poly"); |
| 1485 | if let Decl::TypeDecl { type_spec, .. } = &d.node { |
| 1486 | assert!(matches!(type_spec, TypeSpec::ClassStar)); |
| 1487 | } else { |
| 1488 | panic!("not TypeDecl"); |
| 1489 | } |
| 1490 | } |
| 1491 | |
| 1492 | #[test] |
| 1493 | fn pointer_init() { |
| 1494 | let d = parse_decl("type(node), pointer :: ptr => null()"); |
| 1495 | if let Decl::TypeDecl { entities, .. } = &d.node { |
| 1496 | assert!(entities[0].ptr_init.is_some()); |
| 1497 | } else { |
| 1498 | panic!("not TypeDecl"); |
| 1499 | } |
| 1500 | } |
| 1501 | |
| 1502 | #[test] |
| 1503 | fn intent_inout() { |
| 1504 | let d = parse_decl("real, intent(inout) :: x"); |
| 1505 | if let Decl::TypeDecl { attrs, .. } = &d.node { |
| 1506 | assert!(attrs |
| 1507 | .iter() |
| 1508 | .any(|a| matches!(a, Attribute::Intent(Intent::InOut)))); |
| 1509 | } else { |
| 1510 | panic!("not TypeDecl"); |
| 1511 | } |
| 1512 | } |
| 1513 | |
| 1514 | #[test] |
| 1515 | fn intent_in_out_two_words() { |
| 1516 | let d = parse_decl("real, intent(in out) :: x"); |
| 1517 | if let Decl::TypeDecl { attrs, .. } = &d.node { |
| 1518 | assert!(attrs |
| 1519 | .iter() |
| 1520 | .any(|a| matches!(a, Attribute::Intent(Intent::InOut)))); |
| 1521 | } else { |
| 1522 | panic!("not TypeDecl"); |
| 1523 | } |
| 1524 | } |
| 1525 | |
| 1526 | #[test] |
| 1527 | fn multiple_attributes() { |
| 1528 | let d = parse_decl("real(8), dimension(:,:), allocatable, intent(inout) :: matrix"); |
| 1529 | if let Decl::TypeDecl { attrs, .. } = &d.node { |
| 1530 | assert!(attrs.iter().any(|a| matches!(a, Attribute::Dimension(_)))); |
| 1531 | assert!(attrs.contains(&Attribute::Allocatable)); |
| 1532 | assert!(attrs |
| 1533 | .iter() |
| 1534 | .any(|a| matches!(a, Attribute::Intent(Intent::InOut)))); |
| 1535 | } else { |
| 1536 | panic!("not TypeDecl"); |
| 1537 | } |
| 1538 | } |
| 1539 | |
| 1540 | #[test] |
| 1541 | fn old_style_no_double_colon() { |
| 1542 | let d = parse_decl("integer x, y"); |
| 1543 | if let Decl::TypeDecl { entities, .. } = &d.node { |
| 1544 | assert_eq!(entities.len(), 2); |
| 1545 | assert_eq!(entities[0].name, "x"); |
| 1546 | } else { |
| 1547 | panic!("not TypeDecl"); |
| 1548 | } |
| 1549 | } |
| 1550 | |
| 1551 | #[test] |
| 1552 | fn double_precision() { |
| 1553 | let d = parse_decl("double precision :: x"); |
| 1554 | if let Decl::TypeDecl { type_spec, .. } = &d.node { |
| 1555 | assert!(matches!(type_spec, TypeSpec::DoublePrecision)); |
| 1556 | } else { |
| 1557 | panic!("not TypeDecl"); |
| 1558 | } |
| 1559 | } |
| 1560 | |
| 1561 | #[test] |
| 1562 | fn bind_c() { |
| 1563 | let d = parse_decl("integer, bind(c) :: x"); |
| 1564 | if let Decl::TypeDecl { attrs, .. } = &d.node { |
| 1565 | assert!(attrs.iter().any(|a| matches!(a, Attribute::Bind(None)))); |
| 1566 | } else { |
| 1567 | panic!("not TypeDecl"); |
| 1568 | } |
| 1569 | } |
| 1570 | |
| 1571 | #[test] |
| 1572 | fn enum_bind_c() { |
| 1573 | let d = parse_decl("enum, bind(c)\n enumerator :: red = 1, blue = 2\nend enum\n"); |
| 1574 | if let Decl::EnumDef { enumerators } = &d.node { |
| 1575 | assert_eq!(enumerators.len(), 2); |
| 1576 | assert_eq!(enumerators[0].0, "red"); |
| 1577 | assert_eq!(enumerators[1].0, "blue"); |
| 1578 | } else { |
| 1579 | panic!("not EnumDef"); |
| 1580 | } |
| 1581 | } |
| 1582 | |
| 1583 | // ---- USE statements ---- |
| 1584 | |
| 1585 | #[test] |
| 1586 | fn use_simple() { |
| 1587 | let d = parse_decl("use my_module"); |
| 1588 | if let Decl::UseStmt { module, nature, .. } = &d.node { |
| 1589 | assert_eq!(module, "my_module"); |
| 1590 | assert_eq!(*nature, UseNature::Normal); |
| 1591 | } else { |
| 1592 | panic!("not UseStmt"); |
| 1593 | } |
| 1594 | } |
| 1595 | |
| 1596 | #[test] |
| 1597 | fn use_only() { |
| 1598 | let d = parse_decl("use my_module, only: foo, bar"); |
| 1599 | if let Decl::UseStmt { only, .. } = &d.node { |
| 1600 | let items = only.as_ref().unwrap(); |
| 1601 | assert_eq!(items.len(), 2); |
| 1602 | } else { |
| 1603 | panic!("not UseStmt"); |
| 1604 | } |
| 1605 | } |
| 1606 | |
| 1607 | #[test] |
| 1608 | fn use_intrinsic() { |
| 1609 | let d = parse_decl("use, intrinsic :: iso_c_binding"); |
| 1610 | if let Decl::UseStmt { module, nature, .. } = &d.node { |
| 1611 | assert_eq!(module, "iso_c_binding"); |
| 1612 | assert_eq!(*nature, UseNature::Intrinsic); |
| 1613 | } else { |
| 1614 | panic!("not UseStmt"); |
| 1615 | } |
| 1616 | } |
| 1617 | |
| 1618 | #[test] |
| 1619 | fn use_only_with_rename() { |
| 1620 | let d = parse_decl("use my_module, only: local => remote"); |
| 1621 | if let Decl::UseStmt { only, .. } = &d.node { |
| 1622 | let items = only.as_ref().unwrap(); |
| 1623 | assert!(matches!(&items[0], OnlyItem::Rename(_))); |
| 1624 | } else { |
| 1625 | panic!("not UseStmt"); |
| 1626 | } |
| 1627 | } |
| 1628 | |
| 1629 | #[test] |
| 1630 | fn use_only_generic_specs() { |
| 1631 | let d = parse_decl("use my_module, only: operator(+), operator(//), assignment(=)"); |
| 1632 | if let Decl::UseStmt { only, .. } = &d.node { |
| 1633 | let items = only.as_ref().unwrap(); |
| 1634 | assert_eq!(items.len(), 3); |
| 1635 | assert!(matches!(&items[0], OnlyItem::Generic(name) if name == "operator(+)")); |
| 1636 | assert!(matches!(&items[1], OnlyItem::Generic(name) if name == "operator(//)")); |
| 1637 | assert!(matches!(&items[2], OnlyItem::Generic(name) if name == "assignment(=)")); |
| 1638 | } else { |
| 1639 | panic!("not UseStmt"); |
| 1640 | } |
| 1641 | } |
| 1642 | |
| 1643 | // ---- IMPLICIT ---- |
| 1644 | |
| 1645 | #[test] |
| 1646 | fn implicit_none() { |
| 1647 | let d = parse_decl("implicit none"); |
| 1648 | assert!(matches!( |
| 1649 | d.node, |
| 1650 | Decl::ImplicitNone { |
| 1651 | type_: true, |
| 1652 | external: false |
| 1653 | } |
| 1654 | )); |
| 1655 | } |
| 1656 | |
| 1657 | #[test] |
| 1658 | fn implicit_none_type_external() { |
| 1659 | let d = parse_decl("implicit none(type, external)"); |
| 1660 | assert!(matches!( |
| 1661 | d.node, |
| 1662 | Decl::ImplicitNone { |
| 1663 | type_: true, |
| 1664 | external: true |
| 1665 | } |
| 1666 | )); |
| 1667 | } |
| 1668 | |
| 1669 | #[test] |
| 1670 | fn implicit_double_precision() { |
| 1671 | let d = parse_decl("implicit double precision (a-h, o-z)"); |
| 1672 | if let Decl::ImplicitStmt { specs } = &d.node { |
| 1673 | assert_eq!(specs.len(), 1); |
| 1674 | assert!(matches!(specs[0].type_spec, TypeSpec::DoublePrecision)); |
| 1675 | assert_eq!(specs[0].ranges.len(), 2); |
| 1676 | } else { |
| 1677 | panic!("not ImplicitStmt"); |
| 1678 | } |
| 1679 | } |
| 1680 | |
| 1681 | // ---- PARAMETER, COMMON, DATA, EQUIVALENCE ---- |
| 1682 | |
| 1683 | #[test] |
| 1684 | fn parameter_stmt() { |
| 1685 | let d = parse_decl("parameter (pi = 3.14159, e = 2.71828)"); |
| 1686 | if let Decl::ParameterStmt { pairs } = &d.node { |
| 1687 | assert_eq!(pairs.len(), 2); |
| 1688 | assert_eq!(pairs[0].0, "pi"); |
| 1689 | assert_eq!(pairs[1].0, "e"); |
| 1690 | } else { |
| 1691 | panic!("not ParameterStmt"); |
| 1692 | } |
| 1693 | } |
| 1694 | |
| 1695 | #[test] |
| 1696 | fn common_block() { |
| 1697 | let d = parse_decl("common /block1/ x, y, z"); |
| 1698 | if let Decl::CommonBlock { name, vars } = &d.node { |
| 1699 | assert_eq!(name.as_deref(), Some("block1")); |
| 1700 | assert_eq!(vars.len(), 3); |
| 1701 | } else { |
| 1702 | panic!("not CommonBlock"); |
| 1703 | } |
| 1704 | } |
| 1705 | |
| 1706 | #[test] |
| 1707 | fn data_stmt() { |
| 1708 | let d = parse_decl("data x /1.0/, y /2.0/"); |
| 1709 | if let Decl::DataStmt { sets } = &d.node { |
| 1710 | assert_eq!(sets.len(), 2); |
| 1711 | } else { |
| 1712 | panic!("not DataStmt"); |
| 1713 | } |
| 1714 | } |
| 1715 | |
| 1716 | #[test] |
| 1717 | fn equivalence_stmt() { |
| 1718 | let d = parse_decl("equivalence (a, b), (c, d)"); |
| 1719 | if let Decl::EquivalenceStmt { groups } = &d.node { |
| 1720 | assert_eq!(groups.len(), 2); |
| 1721 | assert_eq!(groups[0].len(), 2); |
| 1722 | } else { |
| 1723 | panic!("not EquivalenceStmt"); |
| 1724 | } |
| 1725 | } |
| 1726 | |
| 1727 | // ---- Audit test gap coverage ---- |
| 1728 | |
| 1729 | #[test] |
| 1730 | fn real_star8_old_style() { |
| 1731 | let d = parse_decl("real*8 :: x"); |
| 1732 | if let Decl::TypeDecl { type_spec, .. } = &d.node { |
| 1733 | assert!(matches!( |
| 1734 | type_spec, |
| 1735 | TypeSpec::Real(Some(KindSelector::Star(_))) |
| 1736 | )); |
| 1737 | } else { |
| 1738 | panic!("not TypeDecl"); |
| 1739 | } |
| 1740 | } |
| 1741 | |
| 1742 | #[test] |
| 1743 | fn character_bare_length() { |
| 1744 | let d = parse_decl("character(10) :: s"); |
| 1745 | if let Decl::TypeDecl { type_spec, .. } = &d.node { |
| 1746 | if let TypeSpec::Character(Some(cs)) = type_spec { |
| 1747 | assert!(matches!(cs.len, Some(LenSpec::Expr(_)))); |
| 1748 | } else { |
| 1749 | panic!("not character type"); |
| 1750 | } |
| 1751 | } else { |
| 1752 | panic!("not TypeDecl"); |
| 1753 | } |
| 1754 | } |
| 1755 | |
| 1756 | #[test] |
| 1757 | fn integer_kind_keyword() { |
| 1758 | let d = parse_decl("integer(kind=4) :: x"); |
| 1759 | if let Decl::TypeDecl { type_spec, .. } = &d.node { |
| 1760 | assert!(matches!(type_spec, TypeSpec::Integer(Some(_)))); |
| 1761 | } else { |
| 1762 | panic!("not TypeDecl"); |
| 1763 | } |
| 1764 | } |
| 1765 | |
| 1766 | #[test] |
| 1767 | fn class_derived_type() { |
| 1768 | let d = parse_decl("class(my_type) :: x"); |
| 1769 | if let Decl::TypeDecl { type_spec, .. } = &d.node { |
| 1770 | assert!(matches!(type_spec, TypeSpec::Class(ref n) if n == "my_type")); |
| 1771 | } else { |
| 1772 | panic!("not TypeDecl"); |
| 1773 | } |
| 1774 | } |
| 1775 | |
| 1776 | #[test] |
| 1777 | fn type_star_assumed() { |
| 1778 | let d = parse_decl("type(*) :: x"); |
| 1779 | if let Decl::TypeDecl { type_spec, .. } = &d.node { |
| 1780 | assert!(matches!(type_spec, TypeSpec::TypeStar)); |
| 1781 | } else { |
| 1782 | panic!("not TypeDecl"); |
| 1783 | } |
| 1784 | } |
| 1785 | |
| 1786 | #[test] |
| 1787 | fn entity_array_spec() { |
| 1788 | let d = parse_decl("integer :: a(10), b(20,30)"); |
| 1789 | if let Decl::TypeDecl { entities, .. } = &d.node { |
| 1790 | assert!(entities[0].array_spec.is_some()); |
| 1791 | assert_eq!(entities[0].array_spec.as_ref().unwrap().len(), 1); |
| 1792 | assert!(entities[1].array_spec.is_some()); |
| 1793 | assert_eq!(entities[1].array_spec.as_ref().unwrap().len(), 2); |
| 1794 | } else { |
| 1795 | panic!("not TypeDecl"); |
| 1796 | } |
| 1797 | } |
| 1798 | |
| 1799 | #[test] |
| 1800 | fn coarray_entity_decl_reports_not_implemented() { |
| 1801 | let tokens = Lexer::tokenize("integer :: x[*]\n", 0).unwrap(); |
| 1802 | let mut parser = Parser::new(&tokens); |
| 1803 | let type_spec = parser |
| 1804 | .try_parse_type_spec() |
| 1805 | .expect("expected type specifier") |
| 1806 | .unwrap(); |
| 1807 | let err = parser |
| 1808 | .parse_type_decl(type_spec) |
| 1809 | .expect_err("coarray declaration should not parse yet"); |
| 1810 | assert!(err |
| 1811 | .msg |
| 1812 | .contains("coarray declarations are recognized but not yet implemented")); |
| 1813 | } |
| 1814 | |
| 1815 | #[test] |
| 1816 | fn logical_type() { |
| 1817 | let d = parse_decl("logical :: flag"); |
| 1818 | if let Decl::TypeDecl { type_spec, .. } = &d.node { |
| 1819 | assert!(matches!(type_spec, TypeSpec::Logical(None))); |
| 1820 | } else { |
| 1821 | panic!("not TypeDecl"); |
| 1822 | } |
| 1823 | } |
| 1824 | |
| 1825 | #[test] |
| 1826 | fn complex_type() { |
| 1827 | let d = parse_decl("complex :: z"); |
| 1828 | if let Decl::TypeDecl { type_spec, .. } = &d.node { |
| 1829 | assert!(matches!(type_spec, TypeSpec::Complex(None))); |
| 1830 | } else { |
| 1831 | panic!("not TypeDecl"); |
| 1832 | } |
| 1833 | } |
| 1834 | |
| 1835 | #[test] |
| 1836 | fn implicit_integer() { |
| 1837 | let d = parse_decl("implicit integer (i-n)"); |
| 1838 | if let Decl::ImplicitStmt { specs } = &d.node { |
| 1839 | assert!(matches!(specs[0].type_spec, TypeSpec::Integer(_))); |
| 1840 | } else { |
| 1841 | panic!("not ImplicitStmt"); |
| 1842 | } |
| 1843 | } |
| 1844 | |
| 1845 | #[test] |
| 1846 | fn use_double_colon() { |
| 1847 | let d = parse_decl("use :: my_module"); |
| 1848 | if let Decl::UseStmt { module, .. } = &d.node { |
| 1849 | assert_eq!(module, "my_module"); |
| 1850 | } else { |
| 1851 | panic!("not UseStmt"); |
| 1852 | } |
| 1853 | } |
| 1854 | |
| 1855 | #[test] |
| 1856 | fn bind_with_name() { |
| 1857 | let d = parse_decl("integer, bind(c, name='cfunc') :: x"); |
| 1858 | if let Decl::TypeDecl { attrs, .. } = &d.node { |
| 1859 | assert!(attrs.iter().any(|a| matches!(a, Attribute::Bind(Some(_))))); |
| 1860 | } else { |
| 1861 | panic!("not TypeDecl"); |
| 1862 | } |
| 1863 | } |
| 1864 | |
| 1865 | #[test] |
| 1866 | fn save_attribute() { |
| 1867 | let d = parse_decl("integer, save :: x"); |
| 1868 | if let Decl::TypeDecl { attrs, .. } = &d.node { |
| 1869 | assert!(attrs.contains(&Attribute::Save)); |
| 1870 | } else { |
| 1871 | panic!("not TypeDecl"); |
| 1872 | } |
| 1873 | } |
| 1874 | |
| 1875 | #[test] |
| 1876 | fn value_attribute() { |
| 1877 | let d = parse_decl("integer, value :: x"); |
| 1878 | if let Decl::TypeDecl { attrs, .. } = &d.node { |
| 1879 | assert!(attrs.contains(&Attribute::Value)); |
| 1880 | } else { |
| 1881 | panic!("not TypeDecl"); |
| 1882 | } |
| 1883 | } |
| 1884 | } |
| 1885 |