Merge #6276

6276: Extract call_info and completion into separate crates r=matklad a=popzxc

As it was discussed in [zulip](https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Fwg-rls-2.2E0/topic/Completion.20refactoring), we need to move `completions` into a separate crate.

Unfortunately, the dependency on `call_info::ActiveParameter` doesn't look easy to get rid of, and it seems to be a topic for a separate PR, thus I also extracted `call_info` into a separate crate (on which both `ide` and `completion` crates depend).

Additionally, a few `FIXME`s in doc-comments were resolved in order to make `tidy` happy.


Co-authored-by: Igor Aleksanov <[email protected]>

1 files changed, 35 insertions, 0 deletions

diff --git a/crates/completion/src/completion_config.rs b/crates/completion/src/completion_config.rs
new file mode 100644
index 000000000..71b49ace8
--- /dev/null
+++ b/crates/completion/src/completion_config.rs
@@ -0,0 +1,35 @@
+//! Settings for tweaking completion.
+//!
+//! The fun thing here is `SnippetCap` -- this type can only be created in this
+//! module, and we use to statically check that we only produce snippet
+//! completions if we are allowed to.
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct CompletionConfig {
+    pub enable_postfix_completions: bool,
+    pub add_call_parenthesis: bool,
+    pub add_call_argument_snippets: bool,
+    pub snippet_cap: Option<SnippetCap>,
+}
+
+impl CompletionConfig {
+    pub fn allow_snippets(&mut self, yes: bool) {
+        self.snippet_cap = if yes { Some(SnippetCap { _private: () }) } else { None }
+    }
+}
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub struct SnippetCap {
+    _private: (),
+}
+
+impl Default for CompletionConfig {
+    fn default() -> Self {
+        CompletionConfig {
+            enable_postfix_completions: true,
+            add_call_parenthesis: true,
+            add_call_argument_snippets: true,
+            snippet_cap: Some(SnippetCap { _private: () }),
+        }
+    }
+}