Add toggle for experimental diagnostics

crates/rust-analyzer/src/config.rs

@@ -23,6 +23,7 @@ pub struct Config {
     pub client_caps: ClientCapsConfig,
 
     pub publish_diagnostics: bool,
+    pub experimental_diagnostics: bool,
     pub diagnostics: DiagnosticsConfig,
     pub lru_capacity: Option<usize>,
     pub proc_macro_srv: Option<(PathBuf, Vec<OsString>)>,
@@ -137,6 +138,7 @@ impl Config {
 
             with_sysroot: true,
             publish_diagnostics: true,
+            experimental_diagnostics: true,
             diagnostics: DiagnosticsConfig::default(),
             lru_capacity: None,
             proc_macro_srv: None,
@@ -187,6 +189,7 @@ impl Config {
 
         self.with_sysroot = data.withSysroot;
         self.publish_diagnostics = data.diagnostics_enable;
+        self.experimental_diagnostics = data.diagnostics_enableExperimental;
         self.diagnostics = DiagnosticsConfig {
             warnings_as_info: data.diagnostics_warningsAsInfo,
             warnings_as_hint: data.diagnostics_warningsAsHint,
@@ -405,6 +408,7 @@ config_data! {
         completion_postfix_enable: bool          = true,
 
         diagnostics_enable: bool                = true,
+        diagnostics_enableExperimental: bool    = true,
         diagnostics_warningsAsHint: Vec<String> = Vec::new(),
         diagnostics_warningsAsInfo: Vec<String> = Vec::new(),