Generate deserialize impls for identifiers

test_suite/tests/compile-fail/identifier/both.rs

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+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#[macro_use]
+extern crate serde_derive;
+
+#[derive(Deserialize)] //~ ERROR: proc-macro derive panicked
+#[serde(field_identifier, variant_identifier)] //~^ HELP: `field_identifier` and `variant_identifier` cannot both be set
+enum F {
+    A,
+    B,
+}
+
+fn main() {}

test_suite/tests/compile-fail/identifier/field_struct.rs

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+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#[macro_use]
+extern crate serde_derive;
+
+#[derive(Deserialize)] //~ ERROR: proc-macro derive panicked
+#[serde(field_identifier)]
+struct S; //~^^ HELP: `field_identifier` can only be used on an enum
+
+fn main() {}

test_suite/tests/compile-fail/identifier/field_tuple.rs

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+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#[macro_use]
+extern crate serde_derive;
+
+#[derive(Deserialize)] //~ ERROR: proc-macro derive panicked
+#[serde(field_identifier)]
+enum F {
+    A,
+    B(u8, u8), //~^^^^ HELP: field_identifier may only contain unit variants
+}
+
+fn main() {}

test_suite/tests/compile-fail/identifier/newtype_not_last.rs

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+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#[macro_use]
+extern crate serde_derive;
+
+#[derive(Deserialize)] //~ ERROR: proc-macro derive panicked
+#[serde(field_identifier)]
+enum F {
+    A,
+    Other(String), //~^^^^ HELP: `Other` must be the last variant
+    B,
+}
+
+fn main() {}

test_suite/tests/compile-fail/identifier/not_identifier.rs

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+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#[macro_use]
+extern crate serde_derive;
+
+#[derive(Deserialize)] //~ ERROR: proc-macro derive panicked
+enum F {
+    A,
+    #[serde(other)] //~^^^ HELP: #[serde(other)] may only be used inside a field_identifier
+    B,
+}
+
+fn main() {}

test_suite/tests/compile-fail/identifier/not_unit.rs

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+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#[macro_use]
+extern crate serde_derive;
+
+#[derive(Deserialize)] //~ ERROR: proc-macro derive panicked
+#[serde(field_identifier)]
+enum F {
+    A,
+    #[serde(other)] //~^^^^ HELP: #[serde(other)] must be on a unit variant
+    Other(u8, u8),
+}
+
+fn main() {}

test_suite/tests/compile-fail/identifier/other_not_last.rs

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+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#[macro_use]
+extern crate serde_derive;
+
+#[derive(Deserialize)] //~ ERROR: proc-macro derive panicked
+#[serde(field_identifier)]
+enum F {
+    A,
+    #[serde(other)] //~^^^^ HELP: #[serde(other)] must be the last variant
+    Other,
+    B,
+}
+
+fn main() {}

test_suite/tests/compile-fail/identifier/serialize.rs

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+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#[macro_use]
+extern crate serde_derive;
+
+#[derive(Serialize)] //~ ERROR: proc-macro derive panicked
+#[serde(field_identifier)] //~^ HELP: field identifiers cannot be serialized
+enum F {
+    A,
+    B,
+}
+
+fn main() {}

test_suite/tests/compile-fail/identifier/variant_struct.rs

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+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#[macro_use]
+extern crate serde_derive;
+
+#[derive(Deserialize)] //~ ERROR: proc-macro derive panicked
+#[serde(variant_identifier)]
+struct S; //~^^ HELP: `variant_identifier` can only be used on an enum
+
+fn main() {}

test_suite/tests/compile-fail/identifier/variant_tuple.rs

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+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#[macro_use]
+extern crate serde_derive;
+
+#[derive(Deserialize)] //~ ERROR: proc-macro derive panicked
+#[serde(variant_identifier)]
+enum F {
+    A,
+    B(u8, u8), //~^^^^ HELP: variant_identifier may only contain unit variants
+}
+
+fn main() {}

test_suite/tests/test_identifier.rs

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+// Copyright 2017 Serde Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#[macro_use]
+extern crate serde_derive;
+
+extern crate serde;
+
+extern crate serde_test;
+use serde_test::{Token, assert_de_tokens};
+
+#[test]
+fn test_variant_identifier() {
+    #[derive(Deserialize, Debug, PartialEq)]
+    #[serde(variant_identifier)]
+    enum V {
+        Aaa,
+        Bbb,
+    }
+
+    assert_de_tokens(&V::Aaa, &[Token::U32(0)]);
+    assert_de_tokens(&V::Aaa, &[Token::Str("Aaa")]);
+    assert_de_tokens(&V::Aaa, &[Token::Bytes(b"Aaa")]);
+}
+
+#[test]
+fn test_field_identifier() {
+    #[derive(Deserialize, Debug, PartialEq)]
+    #[serde(field_identifier, rename_all = "snake_case")]
+    enum F {
+        Aaa,
+        Bbb,
+    }
+
+    assert_de_tokens(&F::Aaa, &[Token::Str("aaa")]);
+    assert_de_tokens(&F::Aaa, &[Token::Bytes(b"aaa")]);
+}
+
+#[test]
+fn test_unit_fallthrough() {
+    #[derive(Deserialize, Debug, PartialEq)]
+    #[serde(field_identifier, rename_all = "snake_case")]
+    enum F {
+        Aaa,
+        Bbb,
+        #[serde(other)]
+        Other,
+    }
+
+    assert_de_tokens(&F::Other, &[Token::Str("x")]);
+}
+
+#[test]
+fn test_newtype_fallthrough() {
+    #[derive(Deserialize, Debug, PartialEq)]
+    #[serde(field_identifier, rename_all = "snake_case")]
+    enum F {
+        Aaa,
+        Bbb,
+        Other(String),
+    }
+
+    assert_de_tokens(&F::Other("x".to_owned()), &[Token::Str("x")]);
+}
+
+#[test]
+fn test_newtype_fallthrough_generic() {
+    #[derive(Deserialize, Debug, PartialEq)]
+    #[serde(field_identifier, rename_all = "snake_case")]
+    enum F<T> {
+        Aaa,
+        Bbb,
+        Other(T),
+    }
+
+    assert_de_tokens(&F::Other("x".to_owned()), &[Token::Str("x")]);
+}