| author |  Andrew Kelley <andrew@ziglang.org> 2021-04-07 21:04:55-07:00 |
| committer | Andrew Kelley <andrew@ziglang.org> 2021-04-07 21:04:55-07:00 |
| log | b67378fb08fb3129b66385479a278a93940f09f5 |
| tree | 337925698e538c1ea5646e0f75175844fc232dca |
| parent | a62e19ec8ea4afcaf31a27dd32fab195a12a4877 |
Sema: `@intToEnum` error msg includes a "declared here" hint
2 files changed, 45 insertions(+), 3 deletions(-)
src/Sema.zig+17-3
| ... | ... | @@ -1983,9 +1983,23 @@ fn zirIntToEnum(sema: *Sema, block: *Scope.Block, inst: zir.Inst.Index) InnerErr |
| 1983 | 1983 | |
| 1984 | 1984 | if (try sema.resolveDefinedValue(block, operand_src, operand)) |int_val| { |
| 1985 | 1985 | if (!dest_ty.enumHasInt(int_val, target)) { |
| 1986 | return mod.fail(&block.base, src, "enum '{}' has no tag with value {}", .{ | |
| 1987 | dest_ty, int_val, | |
| 1988 | }); | |
| 1986 | const msg = msg: { | |
| 1987 | const msg = try mod.errMsg( | |
| 1988 | &block.base, | |
| 1989 | src, | |
| 1990 | "enum '{}' has no tag with value {}", | |
| 1991 | .{ dest_ty, int_val }, | |
| 1992 | ); | |
| 1993 | errdefer msg.destroy(sema.gpa); | |
| 1994 | try mod.errNoteNonLazy( | |
| 1995 | dest_ty.declSrcLoc(), | |
| 1996 | msg, | |
| 1997 | "enum declared here", | |
| 1998 | .{}, | |
| 1999 | ); | |
| 2000 | break :msg msg; | |
| 2001 | }; | |
| 2002 | return mod.failWithOwnedErrorMsg(&block.base, msg); | |
| 1989 | 2003 | } |
| 1990 | 2004 | return mod.constInst(arena, src, .{ |
| 1991 | 2005 | .ty = dest_ty, |
test/stage2/cbe.zig+28
| ... | ... | @@ -674,6 +674,34 @@ pub fn addCases(ctx: *TestContext) !void { |
| 674 | 674 | ":1:28: error: duplicate enum tag", |
| 675 | 675 | ":1:22: note: other tag here", |
| 676 | 676 | }); |
| 677 | ||
| 678 | case.addError( | |
| 679 | \\export fn foo() void { | |
| 680 | \\ const a = true; | |
| 681 | \\ const b = @enumToInt(a); | |
| 682 | \\} | |
| 683 | , &.{ | |
| 684 | ":3:26: error: expected enum or tagged union, found bool", | |
| 685 | }); | |
| 686 | ||
| 687 | case.addError( | |
| 688 | \\export fn foo() void { | |
| 689 | \\ const a = 1; | |
| 690 | \\ const b = @intToEnum(bool, a); | |
| 691 | \\} | |
| 692 | , &.{ | |
| 693 | ":3:26: error: expected enum, found bool", | |
| 694 | }); | |
| 695 | ||
| 696 | case.addError( | |
| 697 | \\const E = enum { a, b, c }; | |
| 698 | \\export fn foo() void { | |
| 699 | \\ const b = @intToEnum(E, 3); | |
| 700 | \\} | |
| 701 | , &.{ | |
| 702 | ":3:15: error: enum 'E' has no tag with value 3", | |
| 703 | ":1:11: note: enum declared here", | |
| 704 | }); | |
| 677 | 705 | } |
| 678 | 706 | |
| 679 | 707 | ctx.c("empty start function", linux_x64, |