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stage2: implement Type.onePossibleValue for structs

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This commit is contained in:
Andrew Kelley 2021-04-02 21:17:23 -07:00
parent d47f0abd5b
commit 2f07d76eee
2 changed files with 18 additions and 2 deletions
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10
src/type.zig
View File

@ -3118,8 +3118,14 @@ pub const Type = extern union {
=> return null,
.@"struct" => {
log.warn("TODO implement Type.onePossibleValue for structs", .{});
return null;
const s = ty.castTag(.@"struct").?.data;
for (s.fields.entries.items) |entry| {
const field_ty = entry.value.ty;
if (field_ty.onePossibleValue() == null) {
return null;
}
}
return Value.initTag(.empty_struct_value);
},
.empty_struct, .empty_struct_literal => return Value.initTag(.empty_struct_value),

10
test/stage2/cbe.zig
View File

@ -524,6 +524,16 @@ pub fn addCases(ctx: *TestContext) !void {
":6:10: error: no field named 'z' in struct 'Point'",
":1:15: note: 'Point' declared here",
});
case.addCompareOutput(
\\const Point = struct { x: i32, y: i32 };
\\export fn main() c_int {
\\ var p: Point = .{
\\ .x = 12,
\\ .y = 24,
\\ };
\\ return p.y - p.x - p.x;
\\}
, "");
}
ctx.c("empty start function", linux_x64,