| author |  Andrew Kelley <andrew@ziglang.org> 2023-02-18 13:04:27-07:00 |
| committer | Andrew Kelley <andrew@ziglang.org> 2023-02-18 19:17:21-07:00 |
| log | bcb72401d3cf01c190a346af9c9d8eec4a334b45 |
| tree | d6af8c82405705c49fd01a8a190df9db5d600248 |
| parent | 22965e6fcbafbcba207a6da8eb493af2cf7ef924 |
AstGen: add error for discard of unbounded counter
6 files changed, 150 insertions(+), 1 deletions(-)
src
test
behavior
src/AstGen.zig+6-1
| ... | ... | @@ -6346,8 +6346,9 @@ fn forExpr( |
| 6346 | 6346 | const i = @intCast(u32, i_usize); |
| 6347 | 6347 | const capture_is_ref = token_tags[capture_token] == .asterisk; |
| 6348 | 6348 | const ident_tok = capture_token + @boolToInt(capture_is_ref); |
| 6349 | const is_discard = mem.eql(u8, tree.tokenSlice(ident_tok), "_"); | |
| 6349 | 6350 | |
| 6350 | if (mem.eql(u8, tree.tokenSlice(ident_tok), "_") and capture_is_ref) { | |
| 6351 | if (is_discard and capture_is_ref) { | |
| 6351 | 6352 | return astgen.failTok(capture_token, "pointer modifier invalid on discard", .{}); |
| 6352 | 6353 | } |
| 6353 | 6354 | // Skip over the comma, and on to the next capture (or the ending pipe character). |
| ... | ... | @@ -6367,6 +6368,10 @@ fn forExpr( |
| 6367 | 6368 | else |
| 6368 | 6369 | .none; |
| 6369 | 6370 | |
| 6371 | if (end_val == .none and is_discard) { | |
| 6372 | return astgen.failTok(ident_tok, "discard of unbounded counter", .{}); | |
| 6373 | } | |
| 6374 | ||
| 6370 | 6375 | const start_is_zero = nodeIsTriviallyZero(tree, start_node); |
| 6371 | 6376 | const range_len = if (end_val == .none or start_is_zero) |
| 6372 | 6377 | end_val |
test/behavior/for.zig+100
| ... | ... | @@ -276,3 +276,103 @@ test "two counters" { |
| 276 | 276 | |
| 277 | 277 | try expect(sum == 10); |
| 278 | 278 | } |
| 279 | ||
| 280 | test "1-based counter and ptr to array" { | |
| 281 | if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO | |
| 282 | if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO | |
| 283 | if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO | |
| 284 | ||
| 285 | var ok: usize = 0; | |
| 286 | ||
| 287 | for (1..6, "hello") |i, b| { | |
| 288 | if (i == 1) { | |
| 289 | try expect(b == 'h'); | |
| 290 | ok += 1; | |
| 291 | } | |
| 292 | if (i == 2) { | |
| 293 | try expect(b == 'e'); | |
| 294 | ok += 1; | |
| 295 | } | |
| 296 | if (i == 3) { | |
| 297 | try expect(b == 'l'); | |
| 298 | ok += 1; | |
| 299 | } | |
| 300 | if (i == 4) { | |
| 301 | try expect(b == 'l'); | |
| 302 | ok += 1; | |
| 303 | } | |
| 304 | if (i == 5) { | |
| 305 | try expect(b == 'o'); | |
| 306 | ok += 1; | |
| 307 | } | |
| 308 | } | |
| 309 | ||
| 310 | try expect(ok == 5); | |
| 311 | } | |
| 312 | ||
| 313 | test "slice and two counters, one is offset and one is runtime" { | |
| 314 | if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO | |
| 315 | if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO | |
| 316 | if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO | |
| 317 | ||
| 318 | const slice: []const u8 = "blah"; | |
| 319 | var start: usize = 0; | |
| 320 | ||
| 321 | for (slice, start..4, 1..5) |a, b, c| { | |
| 322 | if (a == 'b') { | |
| 323 | try expect(b == 0); | |
| 324 | try expect(c == 1); | |
| 325 | } | |
| 326 | if (a == 'l') { | |
| 327 | try expect(b == 1); | |
| 328 | try expect(c == 2); | |
| 329 | } | |
| 330 | if (a == 'a') { | |
| 331 | try expect(b == 2); | |
| 332 | try expect(c == 3); | |
| 333 | } | |
| 334 | if (a == 'h') { | |
| 335 | try expect(b == 3); | |
| 336 | try expect(c == 4); | |
| 337 | } | |
| 338 | } | |
| 339 | } | |
| 340 | ||
| 341 | test "two slices, one captured by-ref" { | |
| 342 | if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO | |
| 343 | if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO | |
| 344 | if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO | |
| 345 | ||
| 346 | var buf: [10]u8 = undefined; | |
| 347 | const slice1: []const u8 = "blah"; | |
| 348 | const slice2: []u8 = buf[0..4]; | |
| 349 | ||
| 350 | for (slice1, slice2) |a, *b| { | |
| 351 | b.* = a; | |
| 352 | } | |
| 353 | ||
| 354 | try expect(slice2[0] == 'b'); | |
| 355 | try expect(slice2[1] == 'l'); | |
| 356 | try expect(slice2[2] == 'a'); | |
| 357 | try expect(slice2[3] == 'h'); | |
| 358 | } | |
| 359 | ||
| 360 | test "raw pointer and slice" { | |
| 361 | if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO | |
| 362 | if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO | |
| 363 | if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO | |
| 364 | if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO | |
| 365 | ||
| 366 | var buf: [10]u8 = undefined; | |
| 367 | const slice: []const u8 = "blah"; | |
| 368 | const ptr: [*]u8 = buf[0..4]; | |
| 369 | ||
| 370 | for (ptr, slice) |*a, b| { | |
| 371 | a.* = b; | |
| 372 | } | |
| 373 | ||
| 374 | try expect(buf[0] == 'b'); | |
| 375 | try expect(buf[1] == 'l'); | |
| 376 | try expect(buf[2] == 'a'); | |
| 377 | try expect(buf[3] == 'h'); | |
| 378 | } |
test/cases/compile_errors/for_discard_unbounded.zig created+10
| ... | ... | @@ -0,0 +1,10 @@ |
| 1 | export fn a() void { | |
| 2 | for (0..10, 10..) |i, _| { | |
| 3 | _ = i; | |
| 4 | } | |
| 5 | } | |
| 6 | // error | |
| 7 | // backend=stage2 | |
| 8 | // target=native | |
| 9 | // | |
| 10 | // :2:27: error: discard of unbounded counter |
test/cases/compile_errors/for_empty.zig created+11
| ... | ... | @@ -0,0 +1,11 @@ |
| 1 | export fn b() void { | |
| 2 | for () |i| { | |
| 3 | _ = i; | |
| 4 | } | |
| 5 | } | |
| 6 | ||
| 7 | // error | |
| 8 | // backend=stage2 | |
| 9 | // target=native | |
| 10 | // | |
| 11 | // :2:10: error: expected expression, found ')' |
test/cases/compile_errors/for_extra_capture.zig created+12
| ... | ... | @@ -0,0 +1,12 @@ |
| 1 | export fn b() void { | |
| 2 | for (0..10) |i, j| { | |
| 3 | _ = i; _ = j; | |
| 4 | } | |
| 5 | } | |
| 6 | ||
| 7 | // error | |
| 8 | // backend=stage2 | |
| 9 | // target=native | |
| 10 | // | |
| 11 | // :2:21: error: extra capture in for loop | |
| 12 | // :2:21: note: run 'zig fmt' to upgrade your code automatically |
test/cases/compile_errors/for_extra_condition.zig created+11
| ... | ... | @@ -0,0 +1,11 @@ |
| 1 | export fn a() void { | |
| 2 | for (0..10, 10..20) |i| { | |
| 3 | _ = i; | |
| 4 | } | |
| 5 | } | |
| 6 | ||
| 7 | // error | |
| 8 | // backend=stage2 | |
| 9 | // target=native | |
| 10 | // | |
| 11 | // :2:19: error: for input is not captured |