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| author | Manish Goregaokar <manishsmail@gmail.com> | 2018-01-24 11:50:30 +0530 |
|---|---|---|
| committer | Manish Goregaokar <manishsmail@gmail.com> | 2018-01-29 11:41:03 +0530 |
| commit | 540f95d9fad41a605e4c8b898d77f47374a76cbd (patch) | |
| tree | f8b26690a103e16aec8df59b458e702700899fc7 /src/libsyntax | |
| parent | a53bdc6212b9abf8538a877ebfde214120bf061f (diff) | |
| download | rust-540f95d9fad41a605e4c8b898d77f47374a76cbd.tar.gz rust-540f95d9fad41a605e4c8b898d77f47374a76cbd.zip | |
Add internal-only rustc_serialize_exclude_null attribute for making the field only exist in the json if the flag is passed
Diffstat (limited to 'src/libsyntax')
| -rw-r--r-- | src/libsyntax/feature_gate.rs | 5 | ||||
| -rw-r--r-- | src/libsyntax/json.rs | 2 | ||||
| -rw-r--r-- | src/libsyntax/lib.rs | 1 |
3 files changed, 8 insertions, 0 deletions
diff --git a/src/libsyntax/feature_gate.rs b/src/libsyntax/feature_gate.rs index 9a2560b0458..3e523fca92a 100644 --- a/src/libsyntax/feature_gate.rs +++ b/src/libsyntax/feature_gate.rs @@ -788,6 +788,11 @@ pub const BUILTIN_ATTRIBUTES: &'static [(&'static str, AttributeType, AttributeG is just used for rustc unit tests \ and will never be stable", cfg_fn!(rustc_attrs))), + ("rustc_serialize_exclude_null", Normal, Gated(Stability::Unstable, + "rustc_attrs", + "the `#[rustc_serialize_exclude_null]` attribute \ + is an internal-only feature", + cfg_fn!(rustc_attrs))), ("rustc_synthetic", Whitelisted, Gated(Stability::Unstable, "rustc_attrs", "this attribute \ diff --git a/src/libsyntax/json.rs b/src/libsyntax/json.rs index 7a8717ada4c..681e14a6137 100644 --- a/src/libsyntax/json.rs +++ b/src/libsyntax/json.rs @@ -108,6 +108,7 @@ struct Diagnostic { } #[derive(RustcEncodable)] +#[allow(unused_attributes)] struct DiagnosticSpan { file_name: String, byte_start: u32, @@ -129,6 +130,7 @@ struct DiagnosticSpan { /// that should be sliced in atop this span. suggested_replacement: Option<String>, /// If the suggestion is approximate + #[rustc_serialize_exclude_null] suggestion_approximate: Option<bool>, /// Macro invocations that created the code at this span, if any. expansion: Option<Box<DiagnosticSpanMacroExpansion>>, diff --git a/src/libsyntax/lib.rs b/src/libsyntax/lib.rs index 3b4c5da10f2..9181cca215c 100644 --- a/src/libsyntax/lib.rs +++ b/src/libsyntax/lib.rs @@ -25,6 +25,7 @@ #![feature(match_default_bindings)] #![feature(i128_type)] #![feature(const_atomic_usize_new)] +#![feature(rustc_attrs)] // See librustc_cratesio_shim/Cargo.toml for a comment explaining this. #[allow(unused_extern_crates)] |