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all: add $res compile time function to get returned value in defer bl…
…ock (#18382)
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7 changes: 7 additions & 0 deletions
7
vlib/v/checker/tests/defer_use_multi_return_value_with_index_out_of_bounds.out
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vlib/v/checker/tests/defer_use_multi_return_value_with_index_out_of_bounds.vv:3:11: error: index 2 out of range of 2 return types | ||
1 | fn test() (string, string) { | ||
2 | defer { | ||
3 | println($res(2)) | ||
| ~~~~~~~ | ||
4 | } | ||
5 | return 'test', 'test2' |
6 changes: 6 additions & 0 deletions
6
vlib/v/checker/tests/defer_use_multi_return_value_with_index_out_of_bounds.vv
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,6 @@ | ||
fn test() (string, string) { | ||
defer { | ||
println($res(2)) | ||
} | ||
return 'test', 'test2' | ||
} |
7 changes: 7 additions & 0 deletions
7
vlib/v/checker/tests/defer_use_multi_return_value_without_index.out
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,7 @@ | ||
vlib/v/checker/tests/defer_use_multi_return_value_without_index.vv:3:11: error: `res` requires an index of the returned value | ||
1 | fn test() (string, string) { | ||
2 | defer { | ||
3 | println($res()) | ||
| ~~~~~~ | ||
4 | } | ||
5 | return 'test', 'test2' |
6 changes: 6 additions & 0 deletions
6
vlib/v/checker/tests/defer_use_multi_return_value_without_index.vv
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,6 @@ | ||
fn test() (string, string) { | ||
defer { | ||
println($res()) | ||
} | ||
return 'test', 'test2' | ||
} |
7 changes: 7 additions & 0 deletions
7
vlib/v/checker/tests/defer_use_returned_value_when_nothing_is_returned.out
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@@ -0,0 +1,7 @@ | ||
vlib/v/checker/tests/defer_use_returned_value_when_nothing_is_returned.vv:3:11: error: `res` can only be used in functions that returns something | ||
1 | fn test() { | ||
2 | defer { | ||
3 | println($res()) | ||
| ~~~~~~ | ||
4 | } | ||
5 | } |
5 changes: 5 additions & 0 deletions
5
vlib/v/checker/tests/defer_use_returned_value_when_nothing_is_returned.vv
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@@ -0,0 +1,5 @@ | ||
fn test() { | ||
defer { | ||
println($res()) | ||
} | ||
} |
7 changes: 7 additions & 0 deletions
7
vlib/v/checker/tests/defer_use_returned_value_when_result_is_returned.out
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@@ -0,0 +1,7 @@ | ||
vlib/v/checker/tests/defer_use_returned_value_when_result_is_returned.vv:3:11: error: `res` cannot be used in functions that returns a Result | ||
1 | fn test() !string { | ||
2 | defer { | ||
3 | println($res()) | ||
| ~~~~~~ | ||
4 | } | ||
5 | return 'test' |
6 changes: 6 additions & 0 deletions
6
vlib/v/checker/tests/defer_use_returned_value_when_result_is_returned.vv
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@@ -0,0 +1,6 @@ | ||
fn test() !string { | ||
defer { | ||
println($res()) | ||
} | ||
return 'test' | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,6 @@ | ||
vlib/v/checker/tests/res_use_outside_defer.vv:2:10: error: `res` can only be used in defer blocks | ||
1 | fn test() string { | ||
2 | println($res()) | ||
| ~~~~~~ | ||
3 | return 'test' | ||
4 | } |
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,4 @@ | ||
fn test() string { | ||
println($res()) | ||
return 'test' | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,40 @@ | ||
struct Test { | ||
mut: | ||
a int | ||
b string | ||
} | ||
|
||
fn (mut test Test) with_single_return() int { | ||
defer { | ||
test.a = $res() | ||
} | ||
return 41 | ||
} | ||
|
||
fn (mut test Test) with_multi_return() (int, string) { | ||
defer { | ||
test.a = $res(0) | ||
test.b = $res(1) | ||
} | ||
return 41, 'foo' | ||
} | ||
|
||
fn test_with_single_return() { | ||
mut test := Test{ | ||
a: 0 | ||
} | ||
assert test.with_single_return() == 41 | ||
assert test.a == 41 | ||
} | ||
|
||
fn test_with_multi_return() { | ||
mut test := Test{ | ||
a: 0 | ||
b: '' | ||
} | ||
a, b := test.with_multi_return() | ||
assert a == 41 | ||
assert b == 'foo' | ||
assert test.a == a | ||
assert test.b == b | ||
} |