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wasm: Add stage2 tests for error unions

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This commit is contained in:
Luuk de Gram 2021-05-28 11:52:08 +02:00
parent 8a81dfc999
commit 5cbe930e36
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2 changed files with 68 additions and 2 deletions
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6
src/codegen/wasm.zig
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@ -692,13 +692,15 @@ pub const Context = struct {
.Struct => return self.fail(.{ .node_offset = 0 }, "TODO: Implement struct as return type for wasm", .{}),
.Optional => return self.fail(.{ .node_offset = 0 }, "TODO: Implement optionals as return type for wasm", .{}),
.ErrorUnion => {
try leb.writeULEB128(writer, @as(u32, 2));
const val_type = try self.genValtype(
.{ .node_offset = 0 },
return_type.errorUnionChild(),
);
try writer.writeByte(val_type);
// write down the amount of return values
try leb.writeULEB128(writer, @as(u32, 2));
try writer.writeByte(wasm.valtype(.i32)); // error code is always an i32 integer.
try writer.writeByte(val_type);
},
else => |ret_type| {
try leb.writeULEB128(writer, @as(u32, 1));

64
test/stage2/wasm.zig
View File

@ -535,4 +535,68 @@ pub fn addCases(ctx: *TestContext) !void {
\\}
, "2\n");
}
{
var case = ctx.exe("wasm error unions", wasi);
case.addCompareOutput(
\\pub export fn _start() void {
\\ var e1 = error.Foo;
\\ var e2 = error.Bar;
\\ assert(e1 != e2);
\\ assert(e1 == error.Foo);
\\ assert(e2 == error.Bar);
\\}
\\
\\fn assert(b: bool) void {
\\ if (!b) unreachable;
\\}
, "");
case.addCompareOutput(
\\pub export fn _start() u32 {
\\ var e: anyerror!u32 = 5;
\\ const i = e catch 10;
\\ return i;
\\}
, "5\n");
case.addCompareOutput(
\\pub export fn _start() u32 {
\\ var e: anyerror!u32 = error.Foo;
\\ const i = e catch 10;
\\ return i;
\\}
, "10\n");
case.addCompareOutput(
\\pub export fn _start() u32 {
\\ var e = foo();
\\ const i = e catch 69;
\\ return i;
\\}
\\
\\fn foo() anyerror!u32 {
\\ return 5;
\\}
, "5\n");
}
{
// TODO implement Type equality comparison of error unions in SEMA
// before we can incrementally compile functions with an error union as return type
var case = ctx.exe("wasm error union part 2", wasi);
case.addCompareOutput(
\\pub export fn _start() u32 {
\\ var e = foo();
\\ const i = e catch 69;
\\ return i;
\\}
\\
\\fn foo() anyerror!u32 {
\\ return error.Bruh;
\\}
, "69\n");
}
}