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Collect locals in context

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This commit is contained in:
adamrk 2020-09-02 20:38:08 +02:00
parent 04fc937700
commit d9bb86ad7d
2 changed files with 15 additions and 12 deletions
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10
crates/ide/src/completion/completion_context.rs
View File

@ -1,7 +1,7 @@
//! FIXME: write short doc here
use base_db::SourceDatabase;
use hir::{Semantics, SemanticsScope, Type};
use hir::{Local, ScopeDef, Semantics, SemanticsScope, Type};
use ide_db::RootDatabase;
use syntax::{
algo::{find_covering_element, find_node_at_offset},
@ -90,6 +90,7 @@ pub(crate) struct CompletionContext<'a> {
pub(super) impl_as_prev_sibling: bool,
pub(super) is_match_arm: bool,
pub(super) has_item_list_or_source_file_parent: bool,
pub(super) locals: Vec<(String, Local)>,
}
impl<'a> CompletionContext<'a> {
@ -118,6 +119,12 @@ impl<'a> CompletionContext<'a> {
original_file.syntax().token_at_offset(position.offset).left_biased()?;
let token = sema.descend_into_macros(original_token.clone());
let scope = sema.scope_at_offset(&token.parent(), position.offset);
let mut locals = vec![];
scope.process_all_names(&mut |name, scope| {
if let ScopeDef::Local(local) = scope {
locals.push((name.to_string(), local));
}
});
let mut ctx = CompletionContext {
sema,
scope,
@ -165,6 +172,7 @@ impl<'a> CompletionContext<'a> {
if_is_prev: false,
is_match_arm: false,
has_item_list_or_source_file_parent: false,
locals,
};
let mut original_file = original_file.syntax().clone();

17
crates/ide/src/completion/presentation.rs
View File

@ -192,20 +192,15 @@ impl Completions {
local_name: Option<String>,
) {
fn add_arg(arg: &str, ty: &Type, ctx: &CompletionContext) -> String {
let mut prefix = "";
if let Some(derefed_ty) = ty.remove_ref() {
ctx.scope.process_all_names(&mut |name, scope| {
if prefix != "" {
return;
for (name, local) in ctx.locals.iter() {
if name == arg && local.can_unify(derefed_ty.clone(), ctx.db) {
return (if ty.is_mutable_reference() { "&mut " } else { "&" }).to_string()
+ &arg.to_string();
}
if let ScopeDef::Local(local) = scope {
if name.to_string() == arg && local.can_unify(derefed_ty.clone(), ctx.db) {
prefix = if ty.is_mutable_reference() { "&mut " } else { "&" };
}
}
});
}
}
prefix.to_string() + arg
arg.to_string()
};
let name = local_name.unwrap_or_else(|| func.name(ctx.db).to_string());
let ast_node = func.source(ctx.db).value;