introduce CallInfo

crates/ra_analysis/src/call_info.rs

@@ -7,10 +7,21 @@ use ra_syntax::{
 use ra_editor::find_node_at_offset;
 use hir::FnSignatureInfo;
 
-use crate::{FilePosition, db::RootDatabase};
+use crate::{FilePosition, CallInfo, db::RootDatabase};
+
+pub(crate) fn call_info(db: &RootDatabase, position: FilePosition) -> Cancelable<Option<CallInfo>> {
+    let (sig_info, active_parameter) = ctry!(call_info_(db, position)?);
+    let res = CallInfo {
+        label: sig_info.label,
+        doc: sig_info.doc,
+        parameters: sig_info.params,
+        active_parameter,
+    };
+    Ok(Some(res))
+}
 
 /// Computes parameter information for the given call expression.
-pub(crate) fn call_info(
+fn call_info_(
     db: &RootDatabase,
     position: FilePosition,
 ) -> Cancelable<Option<(FnSignatureInfo, Option<usize>)>> {

crates/ra_analysis/src/lib.rs

@@ -273,6 +273,14 @@ impl<T> RangeInfo<T> {
     }
 }
 
+#[derive(Debug)]
+pub struct CallInfo {
+    pub label: String,
+    pub doc: Option<String>,
+    pub parameters: Vec<String>,
+    pub active_parameter: Option<usize>,
+}
+
 /// `AnalysisHost` stores the current state of the world.
 #[derive(Debug, Default)]
 pub struct AnalysisHost {
@@ -393,10 +401,7 @@ impl Analysis {
         hover::hover(&*self.db, position)
     }
     /// Computes parameter information for the given call expression.
-    pub fn call_info(
-        &self,
-        position: FilePosition,
-    ) -> Cancelable<Option<(FnSignatureInfo, Option<usize>)>> {
+    pub fn call_info(&self, position: FilePosition) -> Cancelable<Option<CallInfo>> {
         call_info::call_info(&*self.db, position)
     }
     /// Returns a `mod name;` declaration which created the current module.