2017-01-05 16:57:48 +08:00
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const assert = @import("std").debug.assert;
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2017-02-08 06:19:51 +08:00
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const mem = @import("std").mem;
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2017-01-05 16:57:48 +08:00
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2018-02-01 11:48:40 +08:00
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pub fn foo() !i32 {
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2018-01-08 05:51:46 +08:00
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const x = try bar();
|
2017-12-22 13:50:30 +08:00
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|
return x + 1;
|
2016-12-19 13:41:37 +08:00
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|
}
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2018-02-01 11:48:40 +08:00
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|
pub fn bar() !i32 {
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2016-12-19 13:41:37 +08:00
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|
return 13;
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|
}
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2018-02-01 11:48:40 +08:00
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|
pub fn baz() !i32 {
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2018-01-08 06:28:20 +08:00
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|
const y = foo() catch 1234;
|
2016-12-19 13:41:37 +08:00
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|
|
return y + 1;
|
|
|
|
}
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2017-05-24 09:38:31 +08:00
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|
test "error wrapping" {
|
2018-01-09 13:07:01 +08:00
|
|
|
assert((baz() catch unreachable) == 15);
|
2016-12-19 13:41:37 +08:00
|
|
|
}
|
|
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|
2018-01-25 17:10:11 +08:00
|
|
|
fn gimmeItBroke() []const u8 {
|
2017-12-22 13:50:30 +08:00
|
|
|
return @errorName(error.ItBroke);
|
2016-12-22 13:12:27 +08:00
|
|
|
}
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|
2017-05-24 09:38:31 +08:00
|
|
|
test "@errorName" {
|
2017-02-13 06:22:35 +08:00
|
|
|
assert(mem.eql(u8, @errorName(error.AnError), "AnError"));
|
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|
|
assert(mem.eql(u8, @errorName(error.ALongerErrorName), "ALongerErrorName"));
|
2016-12-22 13:12:27 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2017-05-24 09:38:31 +08:00
|
|
|
test "error values" {
|
2016-12-22 14:20:08 +08:00
|
|
|
const a = i32(error.err1);
|
|
|
|
const b = i32(error.err2);
|
|
|
|
assert(a != b);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2017-05-24 09:38:31 +08:00
|
|
|
test "redefinition of error values allowed" {
|
2016-12-22 14:20:08 +08:00
|
|
|
shouldBeNotEqual(error.AnError, error.SecondError);
|
|
|
|
}
|
2018-01-25 17:10:11 +08:00
|
|
|
fn shouldBeNotEqual(a: error, b: error) void {
|
2017-12-22 13:50:30 +08:00
|
|
|
if (a == b) unreachable;
|
2016-12-22 14:20:08 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2017-05-24 09:38:31 +08:00
|
|
|
test "error binary operator" {
|
2018-01-08 06:28:20 +08:00
|
|
|
const a = errBinaryOperatorG(true) catch 3;
|
|
|
|
const b = errBinaryOperatorG(false) catch 3;
|
2016-12-22 14:42:30 +08:00
|
|
|
assert(a == 3);
|
|
|
|
assert(b == 10);
|
|
|
|
}
|
2018-02-01 11:48:40 +08:00
|
|
|
fn errBinaryOperatorG(x: bool) !isize {
|
2017-12-22 13:50:30 +08:00
|
|
|
return if (x) error.ItBroke else isize(10);
|
2016-12-22 14:42:30 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2017-05-24 09:38:31 +08:00
|
|
|
test "unwrap simple value from error" {
|
2018-01-09 13:07:01 +08:00
|
|
|
const i = unwrapSimpleValueFromErrorDo() catch unreachable;
|
2016-12-22 14:42:30 +08:00
|
|
|
assert(i == 13);
|
|
|
|
}
|
2018-01-25 17:10:11 +08:00
|
|
|
fn unwrapSimpleValueFromErrorDo() %isize { return 13; }
|
2016-12-22 14:42:30 +08:00
|
|
|
|
2016-12-22 14:20:08 +08:00
|
|
|
|
2017-05-24 09:38:31 +08:00
|
|
|
test "error return in assignment" {
|
2018-01-09 13:07:01 +08:00
|
|
|
doErrReturnInAssignment() catch unreachable;
|
2016-12-22 21:48:08 +08:00
|
|
|
}
|
|
|
|
|
2018-02-01 11:48:40 +08:00
|
|
|
fn doErrReturnInAssignment() !void {
|
2016-12-22 21:48:08 +08:00
|
|
|
var x : i32 = undefined;
|
2018-01-08 05:51:46 +08:00
|
|
|
x = try makeANonErr();
|
2016-12-22 21:48:08 +08:00
|
|
|
}
|
|
|
|
|
2018-02-01 11:48:40 +08:00
|
|
|
fn makeANonErr() !i32 {
|
2016-12-22 21:48:08 +08:00
|
|
|
return 1;
|
|
|
|
}
|