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|
//! Functions that are used to classify an element from its definition or reference.
use hir::{FromSource, Module, ModuleSource, Path, PathResolution, Source, SourceAnalyzer};
use ra_prof::profile;
use ra_syntax::{ast, match_ast, AstNode};
use test_utils::tested_by;
use super::{
name_definition::{from_assoc_item, from_module_def, from_struct_field},
NameDefinition, NameKind,
};
use crate::db::RootDatabase;
pub(crate) fn classify_name(db: &RootDatabase, name: Source<&ast::Name>) -> Option<NameDefinition> {
let _p = profile("classify_name");
let parent = name.ast.syntax().parent()?;
match_ast! {
match parent {
ast::BindPat(it) => {
let src = name.with_ast(it);
let local = hir::Local::from_source(db, src)?;
Some(NameDefinition {
visibility: None,
container: local.module(db),
kind: NameKind::Local(local),
})
},
ast::RecordFieldDef(it) => {
let ast = hir::FieldSource::Named(it);
let src = name.with_ast(ast);
let field = hir::StructField::from_source(db, src)?;
Some(from_struct_field(db, field))
},
ast::Module(it) => {
let def = {
if !it.has_semi() {
let ast = hir::ModuleSource::Module(it);
let src = name.with_ast(ast);
hir::Module::from_definition(db, src)
} else {
let src = name.with_ast(it);
hir::Module::from_declaration(db, src)
}
}?;
Some(from_module_def(db, def.into(), None))
},
ast::StructDef(it) => {
let src = name.with_ast(it);
let def = hir::Struct::from_source(db, src)?;
Some(from_module_def(db, def.into(), None))
},
ast::EnumDef(it) => {
let src = name.with_ast(it);
let def = hir::Enum::from_source(db, src)?;
Some(from_module_def(db, def.into(), None))
},
ast::TraitDef(it) => {
let src = name.with_ast(it);
let def = hir::Trait::from_source(db, src)?;
Some(from_module_def(db, def.into(), None))
},
ast::StaticDef(it) => {
let src = name.with_ast(it);
let def = hir::Static::from_source(db, src)?;
Some(from_module_def(db, def.into(), None))
},
ast::EnumVariant(it) => {
let src = name.with_ast(it);
let def = hir::EnumVariant::from_source(db, src)?;
Some(from_module_def(db, def.into(), None))
},
ast::FnDef(it) => {
let src = name.with_ast(it);
let def = hir::Function::from_source(db, src)?;
if parent.parent().and_then(ast::ItemList::cast).is_some() {
Some(from_assoc_item(db, def.into()))
} else {
Some(from_module_def(db, def.into(), None))
}
},
ast::ConstDef(it) => {
let src = name.with_ast(it);
let def = hir::Const::from_source(db, src)?;
if parent.parent().and_then(ast::ItemList::cast).is_some() {
Some(from_assoc_item(db, def.into()))
} else {
Some(from_module_def(db, def.into(), None))
}
},
ast::TypeAliasDef(it) => {
let src = name.with_ast(it);
let def = hir::TypeAlias::from_source(db, src)?;
if parent.parent().and_then(ast::ItemList::cast).is_some() {
Some(from_assoc_item(db, def.into()))
} else {
Some(from_module_def(db, def.into(), None))
}
},
ast::MacroCall(it) => {
let src = name.with_ast(it);
let def = hir::MacroDef::from_source(db, src.clone())?;
let module_src = ModuleSource::from_child_node(db, src.as_ref().map(|it| it.syntax()));
let module = Module::from_definition(db, src.with_ast(module_src))?;
Some(NameDefinition {
visibility: None,
container: module,
kind: NameKind::Macro(def),
})
},
_ => None,
}
}
}
pub(crate) fn classify_name_ref(
db: &RootDatabase,
name_ref: Source<&ast::NameRef>,
) -> Option<NameDefinition> {
let _p = profile("classify_name_ref");
let parent = name_ref.ast.syntax().parent()?;
let analyzer = SourceAnalyzer::new(db, name_ref.map(|it| it.syntax()), None);
if let Some(method_call) = ast::MethodCallExpr::cast(parent.clone()) {
tested_by!(goto_definition_works_for_methods);
if let Some(func) = analyzer.resolve_method_call(&method_call) {
return Some(from_assoc_item(db, func.into()));
}
}
if let Some(field_expr) = ast::FieldExpr::cast(parent.clone()) {
tested_by!(goto_definition_works_for_fields);
if let Some(field) = analyzer.resolve_field(&field_expr) {
return Some(from_struct_field(db, field));
}
}
if let Some(record_field) = ast::RecordField::cast(parent.clone()) {
tested_by!(goto_definition_works_for_record_fields);
if let Some(record_lit) = record_field.syntax().ancestors().find_map(ast::RecordLit::cast) {
let variant_def = analyzer.resolve_record_literal(&record_lit)?;
let hir_path = Path::from_name_ref(name_ref.ast);
let hir_name = hir_path.as_ident()?;
let field = variant_def.field(db, hir_name)?;
return Some(from_struct_field(db, field));
}
}
let ast = ModuleSource::from_child_node(db, name_ref.with_ast(&parent));
// FIXME: find correct container and visibility for each case
let container = Module::from_definition(db, name_ref.with_ast(ast))?;
let visibility = None;
if let Some(macro_call) = parent.ancestors().find_map(ast::MacroCall::cast) {
tested_by!(goto_definition_works_for_macros);
if let Some(macro_def) = analyzer.resolve_macro_call(db, ¯o_call) {
let kind = NameKind::Macro(macro_def);
return Some(NameDefinition { kind, container, visibility });
}
}
let path = name_ref.ast.syntax().ancestors().find_map(ast::Path::cast)?;
let resolved = analyzer.resolve_path(db, &path)?;
match resolved {
PathResolution::Def(def) => Some(from_module_def(db, def, Some(container))),
PathResolution::AssocItem(item) => Some(from_assoc_item(db, item)),
PathResolution::Local(local) => {
let container = local.module(db);
let kind = NameKind::Local(local);
Some(NameDefinition { kind, container, visibility: None })
}
PathResolution::GenericParam(par) => {
// FIXME: get generic param def
let kind = NameKind::GenericParam(par);
Some(NameDefinition { kind, container, visibility })
}
PathResolution::Macro(def) => {
let kind = NameKind::Macro(def);
Some(NameDefinition { kind, container, visibility })
}
PathResolution::SelfType(impl_block) => {
let ty = impl_block.target_ty(db);
let kind = NameKind::SelfType(ty);
let container = impl_block.module(db);
Some(NameDefinition { kind, container, visibility })
}
}
}
|
