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|
use hir::{db::AstDatabase, diagnostics::NoSuchField, HasSource, HirDisplay, Semantics};
use ide_db::{base_db::FileId, source_change::SourceChange, RootDatabase};
use syntax::{
ast::{self, edit::IndentLevel, make},
AstNode,
};
use text_edit::TextEdit;
use crate::{
diagnostics::{fix, DiagnosticWithFix},
Assist, AssistResolveStrategy,
};
impl DiagnosticWithFix for NoSuchField {
fn fix(
&self,
sema: &Semantics<RootDatabase>,
_resolve: &AssistResolveStrategy,
) -> Option<Assist> {
let root = sema.db.parse_or_expand(self.file)?;
missing_record_expr_field_fix(
&sema,
self.file.original_file(sema.db),
&self.field.to_node(&root),
)
}
}
fn missing_record_expr_field_fix(
sema: &Semantics<RootDatabase>,
usage_file_id: FileId,
record_expr_field: &ast::RecordExprField,
) -> Option<Assist> {
let record_lit = ast::RecordExpr::cast(record_expr_field.syntax().parent()?.parent()?)?;
let def_id = sema.resolve_variant(record_lit)?;
let module;
let def_file_id;
let record_fields = match def_id {
hir::VariantDef::Struct(s) => {
module = s.module(sema.db);
let source = s.source(sema.db)?;
def_file_id = source.file_id;
let fields = source.value.field_list()?;
record_field_list(fields)?
}
hir::VariantDef::Union(u) => {
module = u.module(sema.db);
let source = u.source(sema.db)?;
def_file_id = source.file_id;
source.value.record_field_list()?
}
hir::VariantDef::Variant(e) => {
module = e.module(sema.db);
let source = e.source(sema.db)?;
def_file_id = source.file_id;
let fields = source.value.field_list()?;
record_field_list(fields)?
}
};
let def_file_id = def_file_id.original_file(sema.db);
let new_field_type = sema.type_of_expr(&record_expr_field.expr()?)?;
if new_field_type.is_unknown() {
return None;
}
let new_field = make::record_field(
None,
make::name(&record_expr_field.field_name()?.text()),
make::ty(&new_field_type.display_source_code(sema.db, module.into()).ok()?),
);
let last_field = record_fields.fields().last()?;
let last_field_syntax = last_field.syntax();
let indent = IndentLevel::from_node(last_field_syntax);
let mut new_field = new_field.to_string();
if usage_file_id != def_file_id {
new_field = format!("pub(crate) {}", new_field);
}
new_field = format!("\n{}{}", indent, new_field);
let needs_comma = !last_field_syntax.to_string().ends_with(',');
if needs_comma {
new_field = format!(",{}", new_field);
}
let source_change = SourceChange::from_text_edit(
def_file_id,
TextEdit::insert(last_field_syntax.text_range().end(), new_field),
);
return Some(fix(
"create_field",
"Create field",
source_change,
record_expr_field.syntax().text_range(),
));
fn record_field_list(field_def_list: ast::FieldList) -> Option<ast::RecordFieldList> {
match field_def_list {
ast::FieldList::RecordFieldList(it) => Some(it),
ast::FieldList::TupleFieldList(_) => None,
}
}
}
#[cfg(test)]
mod tests {
use crate::diagnostics::tests::check_fix;
#[test]
fn test_add_field_from_usage() {
check_fix(
r"
fn main() {
Foo { bar: 3, baz$0: false};
}
struct Foo {
bar: i32
}
",
r"
fn main() {
Foo { bar: 3, baz: false};
}
struct Foo {
bar: i32,
baz: bool
}
",
)
}
#[test]
fn test_add_field_in_other_file_from_usage() {
check_fix(
r#"
//- /main.rs
mod foo;
fn main() {
foo::Foo { bar: 3, $0baz: false};
}
//- /foo.rs
struct Foo {
bar: i32
}
"#,
r#"
struct Foo {
bar: i32,
pub(crate) baz: bool
}
"#,
)
}
}
|
