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Merge #462

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462: Remove UI-ish FnSignatureInfo from hir r=matklad a=matklad



Co-authored-by: Aleksey Kladov <aleksey.kladov@gmail.com>
This commit is contained in:
bors[bot] 2019-01-08 15:45:31 +00:00
commit 63e3afeb68
7 changed files with 482 additions and 522 deletions
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451
crates/ra_analysis/src/call_info.rs Normal file
View file

@ -0,0 +1,451 @@
use std::cmp::{max, min};
use ra_db::{SyntaxDatabase, Cancelable};
use ra_syntax::{
AstNode, SyntaxNode, TextUnit, TextRange,
SyntaxKind::FN_DEF,
ast::{self, ArgListOwner, DocCommentsOwner},
};
use ra_editor::find_node_at_offset;
use crate::{FilePosition, CallInfo, db::RootDatabase};
/// Computes parameter information for the given call expression.
pub(crate) fn call_info(db: &RootDatabase, position: FilePosition) -> Cancelable<Option<CallInfo>> {
let file = db.source_file(position.file_id);
let syntax = file.syntax();
// Find the calling expression and it's NameRef
let calling_node = ctry!(FnCallNode::with_node(syntax, position.offset));
let name_ref = ctry!(calling_node.name_ref());
// Resolve the function's NameRef (NOTE: this isn't entirely accurate).
let file_symbols = db.index_resolve(name_ref)?;
let symbol = ctry!(file_symbols.into_iter().find(|it| it.ptr.kind() == FN_DEF));
let fn_file = db.source_file(symbol.file_id);
let fn_def = symbol.ptr.resolve(&fn_file);
let fn_def = ast::FnDef::cast(&fn_def).unwrap();
let mut call_info = ctry!(CallInfo::new(fn_def));
// If we have a calling expression let's find which argument we are on
let num_params = call_info.parameters.len();
let has_self = fn_def.param_list().and_then(|l| l.self_param()).is_some();
if num_params == 1 {
if !has_self {
call_info.active_parameter = Some(0);
}
} else if num_params > 1 {
// Count how many parameters into the call we are.
// TODO: This is best effort for now and should be fixed at some point.
// It may be better to see where we are in the arg_list and then check
// where offset is in that list (or beyond).
// Revisit this after we get documentation comments in.
if let Some(ref arg_list) = calling_node.arg_list() {
let start = arg_list.syntax().range().start();
let range_search = TextRange::from_to(start, position.offset);
let mut commas: usize = arg_list
.syntax()
.text()
.slice(range_search)
.to_string()
.matches(',')
.count();
// If we have a method call eat the first param since it's just self.
if has_self {
commas += 1;
}
call_info.active_parameter = Some(commas);
}
}
Ok(Some(call_info))
}
enum FnCallNode<'a> {
CallExpr(&'a ast::CallExpr),
MethodCallExpr(&'a ast::MethodCallExpr),
}
impl<'a> FnCallNode<'a> {
pub fn with_node(syntax: &'a SyntaxNode, offset: TextUnit) -> Option<FnCallNode<'a>> {
if let Some(expr) = find_node_at_offset::<ast::CallExpr>(syntax, offset) {
return Some(FnCallNode::CallExpr(expr));
}
if let Some(expr) = find_node_at_offset::<ast::MethodCallExpr>(syntax, offset) {
return Some(FnCallNode::MethodCallExpr(expr));
}
None
}
pub fn name_ref(&self) -> Option<&'a ast::NameRef> {
match *self {
FnCallNode::CallExpr(call_expr) => Some(match call_expr.expr()?.kind() {
ast::ExprKind::PathExpr(path_expr) => path_expr.path()?.segment()?.name_ref()?,
_ => return None,
}),
FnCallNode::MethodCallExpr(call_expr) => call_expr
.syntax()
.children()
.filter_map(ast::NameRef::cast)
.nth(0),
}
}
pub fn arg_list(&self) -> Option<&'a ast::ArgList> {
match *self {
FnCallNode::CallExpr(expr) => expr.arg_list(),
FnCallNode::MethodCallExpr(expr) => expr.arg_list(),
}
}
}
impl CallInfo {
fn new(node: &ast::FnDef) -> Option<Self> {
let mut doc = None;
// Strip the body out for the label.
let mut label: String = if let Some(body) = node.body() {
let body_range = body.syntax().range();
let label: String = node
.syntax()
.children()
.filter(|child| !child.range().is_subrange(&body_range))
.map(|node| node.text().to_string())
.collect();
label
} else {
node.syntax().text().to_string()
};
if let Some((comment_range, docs)) = extract_doc_comments(node) {
let comment_range = comment_range
.checked_sub(node.syntax().range().start())
.unwrap();
let start = comment_range.start().to_usize();
let end = comment_range.end().to_usize();
// Remove the comment from the label
label.replace_range(start..end, "");
// Massage markdown
let mut processed_lines = Vec::new();
let mut in_code_block = false;
for line in docs.lines() {
if line.starts_with("```") {
in_code_block = !in_code_block;
}
let line = if in_code_block && line.starts_with("```") && !line.contains("rust") {
"```rust".into()
} else {
line.to_string()
};
processed_lines.push(line);
}
if !processed_lines.is_empty() {
doc = Some(processed_lines.join("\n"));
}
}
Some(CallInfo {
parameters: param_list(node),
label: label.trim().to_owned(),
doc,
active_parameter: None,
})
}
}
fn extract_doc_comments(node: &ast::FnDef) -> Option<(TextRange, String)> {
if node.doc_comments().count() == 0 {
return None;
}
let comment_text = node.doc_comment_text();
let (begin, end) = node
.doc_comments()
.map(|comment| comment.syntax().range())
.map(|range| (range.start().to_usize(), range.end().to_usize()))
.fold((std::usize::MAX, std::usize::MIN), |acc, range| {
(min(acc.0, range.0), max(acc.1, range.1))
});
let range = TextRange::from_to(TextUnit::from_usize(begin), TextUnit::from_usize(end));
Some((range, comment_text))
}
fn param_list(node: &ast::FnDef) -> Vec<String> {
let mut res = vec![];
if let Some(param_list) = node.param_list() {
if let Some(self_param) = param_list.self_param() {
res.push(self_param.syntax().text().to_string())
}
// Maybe use param.pat here? See if we can just extract the name?
//res.extend(param_list.params().map(|p| p.syntax().text().to_string()));
res.extend(
param_list
.params()
.filter_map(|p| p.pat())
.map(|pat| pat.syntax().text().to_string()),
);
}
res
}
#[cfg(test)]
mod tests {
use super::*;
use crate::mock_analysis::single_file_with_position;
fn call_info(text: &str) -> CallInfo {
let (analysis, position) = single_file_with_position(text);
analysis.call_info(position).unwrap().unwrap()
}
#[test]
fn test_fn_signature_two_args_first() {
let info = call_info(
r#"fn foo(x: u32, y: u32) -> u32 {x + y}
fn bar() { foo(<|>3, ); }"#,
);
assert_eq!(info.parameters, vec!("x".to_string(), "y".to_string()));
assert_eq!(info.active_parameter, Some(0));
}
#[test]
fn test_fn_signature_two_args_second() {
let info = call_info(
r#"fn foo(x: u32, y: u32) -> u32 {x + y}
fn bar() { foo(3, <|>); }"#,
);
assert_eq!(info.parameters, vec!("x".to_string(), "y".to_string()));
assert_eq!(info.active_parameter, Some(1));
}
#[test]
fn test_fn_signature_for_impl() {
let info = call_info(
r#"struct F; impl F { pub fn new() { F{}} }
fn bar() {let _ : F = F::new(<|>);}"#,
);
assert_eq!(info.parameters, Vec::<String>::new());
assert_eq!(info.active_parameter, None);
}
#[test]
fn test_fn_signature_for_method_self() {
let info = call_info(
r#"struct F;
impl F {
pub fn new() -> F{
F{}
}
pub fn do_it(&self) {}
}
fn bar() {
let f : F = F::new();
f.do_it(<|>);
}"#,
);
assert_eq!(info.parameters, vec!["&self".to_string()]);
assert_eq!(info.active_parameter, None);
}
#[test]
fn test_fn_signature_for_method_with_arg() {
let info = call_info(
r#"struct F;
impl F {
pub fn new() -> F{
F{}
}
pub fn do_it(&self, x: i32) {}
}
fn bar() {
let f : F = F::new();
f.do_it(<|>);
}"#,
);
assert_eq!(info.parameters, vec!["&self".to_string(), "x".to_string()]);
assert_eq!(info.active_parameter, Some(1));
}
#[test]
fn test_fn_signature_with_docs_simple() {
let info = call_info(
r#"
/// test
// non-doc-comment
fn foo(j: u32) -> u32 {
j
}
fn bar() {
let _ = foo(<|>);
}
"#,
);
assert_eq!(info.parameters, vec!["j".to_string()]);
assert_eq!(info.active_parameter, Some(0));
assert_eq!(info.label, "fn foo(j: u32) -> u32".to_string());
assert_eq!(info.doc, Some("test".into()));
}
#[test]
fn test_fn_signature_with_docs() {
let info = call_info(
r#"
/// Adds one to the number given.
///
/// # Examples
///
/// ```
/// let five = 5;
///
/// assert_eq!(6, my_crate::add_one(5));
/// ```
pub fn add_one(x: i32) -> i32 {
x + 1
}
pub fn do() {
add_one(<|>
}"#,
);
assert_eq!(info.parameters, vec!["x".to_string()]);
assert_eq!(info.active_parameter, Some(0));
assert_eq!(info.label, "pub fn add_one(x: i32) -> i32".to_string());
assert_eq!(
info.doc,
Some(
r#"Adds one to the number given.
# Examples
```rust
let five = 5;
assert_eq!(6, my_crate::add_one(5));
```"#
.into()
)
);
}
#[test]
fn test_fn_signature_with_docs_impl() {
let info = call_info(
r#"
struct addr;
impl addr {
/// Adds one to the number given.
///
/// # Examples
///
/// ```
/// let five = 5;
///
/// assert_eq!(6, my_crate::add_one(5));
/// ```
pub fn add_one(x: i32) -> i32 {
x + 1
}
}
pub fn do_it() {
addr {};
addr::add_one(<|>);
}"#,
);
assert_eq!(info.parameters, vec!["x".to_string()]);
assert_eq!(info.active_parameter, Some(0));
assert_eq!(info.label, "pub fn add_one(x: i32) -> i32".to_string());
assert_eq!(
info.doc,
Some(
r#"Adds one to the number given.
# Examples
```rust
let five = 5;
assert_eq!(6, my_crate::add_one(5));
```"#
.into()
)
);
}
#[test]
fn test_fn_signature_with_docs_from_actix() {
let info = call_info(
r#"
pub trait WriteHandler<E>
where
Self: Actor,
Self::Context: ActorContext,
{
/// Method is called when writer emits error.
///
/// If this method returns `ErrorAction::Continue` writer processing
/// continues otherwise stream processing stops.
fn error(&mut self, err: E, ctx: &mut Self::Context) -> Running {
Running::Stop
}
/// Method is called when writer finishes.
///
/// By default this method stops actor's `Context`.
fn finished(&mut self, ctx: &mut Self::Context) {
ctx.stop()
}
}
pub fn foo() {
WriteHandler r;
r.finished(<|>);
}
"#,
);
assert_eq!(
info.parameters,
vec!["&mut self".to_string(), "ctx".to_string()]
);
assert_eq!(info.active_parameter, Some(1));
assert_eq!(
info.doc,
Some(
r#"Method is called when writer finishes.
By default this method stops actor's `Context`."#
.into()
)
);
}
}

114
crates/ra_analysis/src/imp.rs
View file

@ -3,13 +3,13 @@ use std::sync::Arc;
use salsa::Database;
use hir::{
self, FnSignatureInfo, Problem, source_binder,
self, Problem, source_binder,
};
use ra_db::{FilesDatabase, SourceRoot, SourceRootId, SyntaxDatabase};
use ra_editor::{self, find_node_at_offset, assists, LocalEdit, Severity};
use ra_syntax::{
SyntaxNode, TextRange, TextUnit, AstNode, SourceFile,
ast::{self, ArgListOwner, NameOwner},
TextRange, AstNode, SourceFile,
ast::{self, NameOwner},
SyntaxKind::*,
};
@ -262,75 +262,6 @@ impl db::RootDatabase {
.collect()
}
pub(crate) fn resolve_callable(
&self,
position: FilePosition,
) -> Cancelable<Option<(FnSignatureInfo, Option<usize>)>> {
let file = self.source_file(position.file_id);
let syntax = file.syntax();
// Find the calling expression and it's NameRef
let calling_node = ctry!(FnCallNode::with_node(syntax, position.offset));
let name_ref = ctry!(calling_node.name_ref());
// Resolve the function's NameRef (NOTE: this isn't entirely accurate).
let file_symbols = self.index_resolve(name_ref)?;
for symbol in file_symbols {
if symbol.ptr.kind() == FN_DEF {
let fn_file = self.source_file(symbol.file_id);
let fn_def = symbol.ptr.resolve(&fn_file);
let fn_def = ast::FnDef::cast(&fn_def).unwrap();
let descr = ctry!(source_binder::function_from_source(
self,
symbol.file_id,
fn_def
)?);
if let Some(descriptor) = descr.signature_info(self) {
// If we have a calling expression let's find which argument we are on
let mut current_parameter = None;
let num_params = descriptor.params.len();
let has_self = fn_def.param_list().and_then(|l| l.self_param()).is_some();
if num_params == 1 {
if !has_self {
current_parameter = Some(0);
}
} else if num_params > 1 {
// Count how many parameters into the call we are.
// TODO: This is best effort for now and should be fixed at some point.
// It may be better to see where we are in the arg_list and then check
// where offset is in that list (or beyond).
// Revisit this after we get documentation comments in.
if let Some(ref arg_list) = calling_node.arg_list() {
let start = arg_list.syntax().range().start();
let range_search = TextRange::from_to(start, position.offset);
let mut commas: usize = arg_list
.syntax()
.text()
.slice(range_search)
.to_string()
.matches(',')
.count();
// If we have a method call eat the first param since it's just self.
if has_self {
commas += 1;
}
current_parameter = Some(commas);
}
}
return Ok(Some((descriptor, current_parameter)));
}
}
}
Ok(None)
}
pub(crate) fn rename(
&self,
position: FilePosition,
@ -375,42 +306,3 @@ impl SourceChange {
}
}
}
enum FnCallNode<'a> {
CallExpr(&'a ast::CallExpr),
MethodCallExpr(&'a ast::MethodCallExpr),
}
impl<'a> FnCallNode<'a> {
pub fn with_node(syntax: &'a SyntaxNode, offset: TextUnit) -> Option<FnCallNode<'a>> {
if let Some(expr) = find_node_at_offset::<ast::CallExpr>(syntax, offset) {
return Some(FnCallNode::CallExpr(expr));
}
if let Some(expr) = find_node_at_offset::<ast::MethodCallExpr>(syntax, offset) {
return Some(FnCallNode::MethodCallExpr(expr));
}
None
}
pub fn name_ref(&self) -> Option<&'a ast::NameRef> {
match *self {
FnCallNode::CallExpr(call_expr) => Some(match call_expr.expr()?.kind() {
ast::ExprKind::PathExpr(path_expr) => path_expr.path()?.segment()?.name_ref()?,
_ => return None,
}),
FnCallNode::MethodCallExpr(call_expr) => call_expr
.syntax()
.children()
.filter_map(ast::NameRef::cast)
.nth(0),
}
}
pub fn arg_list(&self) -> Option<&'a ast::ArgList> {
match *self {
FnCallNode::CallExpr(expr) => expr.arg_list(),
FnCallNode::MethodCallExpr(expr) => expr.arg_list(),
}
}
}

21
crates/ra_analysis/src/lib.rs
View file

@ -22,6 +22,7 @@ mod symbol_index;
mod extend_selection;
mod hover;
mod call_info;
mod syntax_highlighting;
use std::{fmt, sync::Arc};
@ -39,7 +40,6 @@ pub use crate::{
completion::{CompletionItem, CompletionItemKind, InsertText},
runnables::{Runnable, RunnableKind},
};
pub use hir::FnSignatureInfo;
pub use ra_editor::{Fold, FoldKind, HighlightedRange, LineIndex, Severity, StructureNode};
pub use ra_db::{
@ -272,6 +272,14 @@ 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 {
@ -391,6 +399,10 @@ impl Analysis {
pub fn hover(&self, position: FilePosition) -> Cancelable<Option<RangeInfo<String>>> {
hover::hover(&*self.db, position)
}
/// Computes parameter information for the given call expression.
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.
pub fn parent_module(&self, position: FilePosition) -> Cancelable<Vec<NavigationTarget>> {
self.db.parent_module(position)
@ -425,13 +437,6 @@ impl Analysis {
pub fn diagnostics(&self, file_id: FileId) -> Cancelable<Vec<Diagnostic>> {
self.db.diagnostics(file_id)
}
/// Computes parameter information for the given call expression.
pub fn resolve_callable(
&self,
position: FilePosition,
) -> Cancelable<Option<(FnSignatureInfo, Option<usize>)>> {
self.db.resolve_callable(position)
}
/// Computes the type of the expression at the given position.
pub fn type_of(&self, frange: FileRange) -> Cancelable<Option<String>> {
hover::type_of(&*self.db, frange)

261
crates/ra_analysis/tests/test/main.rs
View file

@ -5,14 +5,9 @@ use test_utils::{assert_eq_dbg, assert_eq_text};
use ra_analysis::{
mock_analysis::{analysis_and_position, single_file, single_file_with_position, MockAnalysis},
AnalysisChange, CrateGraph, FileId, FnSignatureInfo, Query
AnalysisChange, CrateGraph, FileId, Query
};
fn get_signature(text: &str) -> (FnSignatureInfo, Option<usize>) {
let (analysis, position) = single_file_with_position(text);
analysis.resolve_callable(position).unwrap().unwrap()
}
#[test]
fn test_unresolved_module_diagnostic() {
let (analysis, file_id) = single_file("mod foo;");
@ -99,260 +94,6 @@ fn test_resolve_crate_root() {
assert_eq!(host.analysis().crate_for(mod_file).unwrap(), vec![crate_id]);
}
#[test]
fn test_fn_signature_two_args_first() {
let (desc, param) = get_signature(
r#"fn foo(x: u32, y: u32) -> u32 {x + y}
fn bar() { foo(<|>3, ); }"#,
);
assert_eq!(desc.name, "foo".to_string());
assert_eq!(desc.params, vec!("x".to_string(), "y".to_string()));
assert_eq!(desc.ret_type, Some("-> u32".into()));
assert_eq!(param, Some(0));
}
#[test]
fn test_fn_signature_two_args_second() {
let (desc, param) = get_signature(
r#"fn foo(x: u32, y: u32) -> u32 {x + y}
fn bar() { foo(3, <|>); }"#,
);
assert_eq!(desc.name, "foo".to_string());
assert_eq!(desc.params, vec!("x".to_string(), "y".to_string()));
assert_eq!(desc.ret_type, Some("-> u32".into()));
assert_eq!(param, Some(1));
}
#[test]
fn test_fn_signature_for_impl() {
let (desc, param) = get_signature(
r#"struct F; impl F { pub fn new() { F{}} }
fn bar() {let _ : F = F::new(<|>);}"#,
);
assert_eq!(desc.name, "new".to_string());
assert_eq!(desc.params, Vec::<String>::new());
assert_eq!(desc.ret_type, None);
assert_eq!(param, None);
}
#[test]
fn test_fn_signature_for_method_self() {
let (desc, param) = get_signature(
r#"struct F;
impl F {
pub fn new() -> F{
F{}
}
pub fn do_it(&self) {}
}
fn bar() {
let f : F = F::new();
f.do_it(<|>);
}"#,
);
assert_eq!(desc.name, "do_it".to_string());
assert_eq!(desc.params, vec!["&self".to_string()]);
assert_eq!(desc.ret_type, None);
assert_eq!(param, None);
}
#[test]
fn test_fn_signature_for_method_with_arg() {
let (desc, param) = get_signature(
r#"struct F;
impl F {
pub fn new() -> F{
F{}
}
pub fn do_it(&self, x: i32) {}
}
fn bar() {
let f : F = F::new();
f.do_it(<|>);
}"#,
);
assert_eq!(desc.name, "do_it".to_string());
assert_eq!(desc.params, vec!["&self".to_string(), "x".to_string()]);
assert_eq!(desc.ret_type, None);
assert_eq!(param, Some(1));
}
#[test]
fn test_fn_signature_with_docs_simple() {
let (desc, param) = get_signature(
r#"
/// test
// non-doc-comment
fn foo(j: u32) -> u32 {
j
}
fn bar() {
let _ = foo(<|>);
}
"#,
);
assert_eq!(desc.name, "foo".to_string());
assert_eq!(desc.params, vec!["j".to_string()]);
assert_eq!(desc.ret_type, Some("-> u32".to_string()));
assert_eq!(param, Some(0));
assert_eq!(desc.label, "fn foo(j: u32) -> u32".to_string());
assert_eq!(desc.doc, Some("test".into()));
}
#[test]
fn test_fn_signature_with_docs() {
let (desc, param) = get_signature(
r#"
/// Adds one to the number given.
///
/// # Examples
///
/// ```
/// let five = 5;
///
/// assert_eq!(6, my_crate::add_one(5));
/// ```
pub fn add_one(x: i32) -> i32 {
x + 1
}
pub fn do() {
add_one(<|>
}"#,
);
assert_eq!(desc.name, "add_one".to_string());
assert_eq!(desc.params, vec!["x".to_string()]);
assert_eq!(desc.ret_type, Some("-> i32".to_string()));
assert_eq!(param, Some(0));
assert_eq!(desc.label, "pub fn add_one(x: i32) -> i32".to_string());
assert_eq!(
desc.doc,
Some(
r#"Adds one to the number given.
# Examples
```rust
let five = 5;
assert_eq!(6, my_crate::add_one(5));
```"#
.into()
)
);
}
#[test]
fn test_fn_signature_with_docs_impl() {
let (desc, param) = get_signature(
r#"
struct addr;
impl addr {
/// Adds one to the number given.
///
/// # Examples
///
/// ```
/// let five = 5;
///
/// assert_eq!(6, my_crate::add_one(5));
/// ```
pub fn add_one(x: i32) -> i32 {
x + 1
}
}
pub fn do_it() {
addr {};
addr::add_one(<|>);
}"#,
);
assert_eq!(desc.name, "add_one".to_string());
assert_eq!(desc.params, vec!["x".to_string()]);
assert_eq!(desc.ret_type, Some("-> i32".to_string()));
assert_eq!(param, Some(0));
assert_eq!(desc.label, "pub fn add_one(x: i32) -> i32".to_string());
assert_eq!(
desc.doc,
Some(
r#"Adds one to the number given.
# Examples
```rust
let five = 5;
assert_eq!(6, my_crate::add_one(5));
```"#
.into()
)
);
}
#[test]
fn test_fn_signature_with_docs_from_actix() {
let (desc, param) = get_signature(
r#"
pub trait WriteHandler<E>
where
Self: Actor,
Self::Context: ActorContext,
{
/// Method is called when writer emits error.
///
/// If this method returns `ErrorAction::Continue` writer processing
/// continues otherwise stream processing stops.
fn error(&mut self, err: E, ctx: &mut Self::Context) -> Running {
Running::Stop
}
/// Method is called when writer finishes.
///
/// By default this method stops actor's `Context`.
fn finished(&mut self, ctx: &mut Self::Context) {
ctx.stop()
}
}
pub fn foo() {
WriteHandler r;
r.finished(<|>);
}
"#,
);
assert_eq!(desc.name, "finished".to_string());
assert_eq!(
desc.params,
vec!["&mut self".to_string(), "ctx".to_string()]
);
assert_eq!(desc.ret_type, None);
assert_eq!(param, Some(1));
assert_eq!(
desc.doc,
Some(
r#"Method is called when writer finishes.
By default this method stops actor's `Context`."#
.into()
)
);
}
fn get_all_refs(text: &str) -> Vec<(FileId, TextRange)> {
let (analysis, position) = single_file_with_position(text);
analysis.find_all_refs(position).unwrap()

127
crates/ra_hir/src/function.rs
View file

@ -1,14 +1,11 @@
mod scope;
use std::{
cmp::{max, min},
sync::Arc,
};
use std::sync::Arc;
use ra_db::Cancelable;
use ra_syntax::{
TextRange, TextUnit, TreePtr,
ast::{self, AstNode, DocCommentsOwner, NameOwner},
TreePtr,
ast::{self, AstNode},
};
use crate::{DefId, DefKind, HirDatabase, ty::InferenceResult, Module, Crate, impl_block::ImplBlock, expr::{Body, BodySyntaxMapping}, type_ref::{TypeRef, Mutability}, Name};
@ -57,11 +54,6 @@ impl Function {
db.fn_signature(self.def_id)
}
pub fn signature_info(&self, db: &impl HirDatabase) -> Option<FnSignatureInfo> {
let syntax = self.syntax(db);
FnSignatureInfo::new(&syntax)
}
pub fn infer(&self, db: &impl HirDatabase) -> Cancelable<Arc<InferenceResult>> {
db.infer(self.def_id)
}
@ -132,116 +124,3 @@ pub(crate) fn fn_signature(db: &impl HirDatabase, def_id: DefId) -> Arc<FnSignat
let sig = FnSignature { args, ret_type };
Arc::new(sig)
}
#[derive(Debug, Clone)]
pub struct FnSignatureInfo {
pub name: String,
pub label: String,
pub ret_type: Option<String>,
pub params: Vec<String>,
pub doc: Option<String>,
}
impl FnSignatureInfo {
fn new(node: &ast::FnDef) -> Option<Self> {
let name = node.name()?.text().to_string();
let mut doc = None;
// Strip the body out for the label.
let mut label: String = if let Some(body) = node.body() {
let body_range = body.syntax().range();
let label: String = node
.syntax()
.children()
.filter(|child| !child.range().is_subrange(&body_range))
.map(|node| node.text().to_string())
.collect();
label
} else {
node.syntax().text().to_string()
};
if let Some((comment_range, docs)) = FnSignatureInfo::extract_doc_comments(node) {
let comment_range = comment_range
.checked_sub(node.syntax().range().start())
.unwrap();
let start = comment_range.start().to_usize();
let end = comment_range.end().to_usize();
// Remove the comment from the label
label.replace_range(start..end, "");
// Massage markdown
let mut processed_lines = Vec::new();
let mut in_code_block = false;
for line in docs.lines() {
if line.starts_with("```") {
in_code_block = !in_code_block;
}
let line = if in_code_block && line.starts_with("```") && !line.contains("rust") {
"```rust".into()
} else {
line.to_string()
};
processed_lines.push(line);
}
if !processed_lines.is_empty() {
doc = Some(processed_lines.join("\n"));
}
}
let params = FnSignatureInfo::param_list(node);
let ret_type = node.ret_type().map(|r| r.syntax().text().to_string());
Some(FnSignatureInfo {
name,
ret_type,
params,
label: label.trim().to_owned(),
doc,
})
}
fn extract_doc_comments(node: &ast::FnDef) -> Option<(TextRange, String)> {
if node.doc_comments().count() == 0 {
return None;
}
let comment_text = node.doc_comment_text();
let (begin, end) = node
.doc_comments()
.map(|comment| comment.syntax().range())
.map(|range| (range.start().to_usize(), range.end().to_usize()))
.fold((std::usize::MAX, std::usize::MIN), |acc, range| {
(min(acc.0, range.0), max(acc.1, range.1))
});
let range = TextRange::from_to(TextUnit::from_usize(begin), TextUnit::from_usize(end));
Some((range, comment_text))
}
fn param_list(node: &ast::FnDef) -> Vec<String> {
let mut res = vec![];
if let Some(param_list) = node.param_list() {
if let Some(self_param) = param_list.self_param() {
res.push(self_param.syntax().text().to_string())
}
// Maybe use param.pat here? See if we can just extract the name?
//res.extend(param_list.params().map(|p| p.syntax().text().to_string()));
res.extend(
param_list
.params()
.filter_map(|p| p.pat())
.map(|pat| pat.syntax().text().to_string()),
);
}
res
}
}

2
crates/ra_hir/src/lib.rs
View file

@ -53,8 +53,6 @@ pub use self::{
impl_block::{ImplBlock, ImplItem},
};
pub use self::function::FnSignatureInfo;
pub use self::code_model_api::{
Crate, CrateDependency,
Module, ModuleSource, Problem,

28
crates/ra_lsp_server/src/main_loop/handlers.rs
View file

@ -475,36 +475,30 @@ pub fn handle_signature_help(
params: req::TextDocumentPositionParams,
) -> Result<Option<req::SignatureHelp>> {
let position = params.try_conv_with(&world)?;
if let Some((descriptor, active_param)) = world.analysis().resolve_callable(position)? {
let parameters: Vec<ParameterInformation> = descriptor
.params
.iter()
if let Some(call_info) = world.analysis().call_info(position)? {
let parameters: Vec<ParameterInformation> = call_info
.parameters
.into_iter()
.map(|param| ParameterInformation {
label: ParameterLabel::Simple(param.clone()),
documentation: None,
})
.collect();
let documentation = if let Some(doc) = descriptor.doc {
Some(Documentation::MarkupContent(MarkupContent {
let documentation = call_info.doc.map(|value| {
Documentation::MarkupContent(MarkupContent {
kind: MarkupKind::Markdown,
value: doc,
}))
} else {
None
};
value,
})
});
let sig_info = SignatureInformation {
label: descriptor.label,
label: call_info.label,
documentation,
parameters: Some(parameters),
};
Ok(Some(req::SignatureHelp {
signatures: vec![sig_info],
active_signature: Some(0),
active_parameter: active_param.map(|a| a as u64),
active_parameter: call_info.active_parameter.map(|it| it as u64),
}))
} else {
Ok(None)