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New HirDisplay method for displaying sourcecode

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This commit is contained in:
Timo Freiberg 2020-04-25 16:57:59 +02:00
parent d3eb9d8eaf
commit fe93675e8a
4 changed files with 184 additions and 41 deletions
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17
crates/ra_hir_ty/src/tests.rs
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@ -6,6 +6,7 @@ mod patterns;
mod traits;
mod method_resolution;
mod macros;
mod display_source_code;
use std::sync::Arc;
@ -16,7 +17,7 @@ use hir_def::{
item_scope::ItemScope,
keys,
nameres::CrateDefMap,
AssocItemId, DefWithBodyId, LocalModuleId, Lookup, ModuleDefId,
AssocItemId, DefWithBodyId, LocalModuleId, Lookup, ModuleDefId, ModuleId,
};
use hir_expand::{db::AstDatabase, InFile};
use insta::assert_snapshot;
@ -37,6 +38,18 @@ use crate::{
// update the snapshots.
fn type_at_pos(db: &TestDB, pos: FilePosition) -> String {
type_at_pos_displayed(db, pos, |ty, _| ty.display(db).to_string())
}
fn displayed_source_at_pos(db: &TestDB, pos: FilePosition) -> String {
type_at_pos_displayed(db, pos, |ty, module_id| ty.display_source_code(db, module_id).unwrap())
}
fn type_at_pos_displayed(
db: &TestDB,
pos: FilePosition,
display_fn: impl FnOnce(&Ty, ModuleId) -> String,
) -> String {
let file = db.parse(pos.file_id).ok().unwrap();
let expr = algo::find_node_at_offset::<ast::Expr>(file.syntax(), pos.offset).unwrap();
let fn_def = expr.syntax().ancestors().find_map(ast::FnDef::cast).unwrap();
@ -49,7 +62,7 @@ fn type_at_pos(db: &TestDB, pos: FilePosition) -> String {
if let Some(expr_id) = source_map.node_expr(InFile::new(pos.file_id.into(), &expr)) {
let infer = db.infer(func.into());
let ty = &infer[expr_id];
return ty.display(db).to_string();
return display_fn(ty, module);
}
panic!("Can't find expression")
}