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|
#[doc =
"Pulls type information out of the AST and attaches it to the document"];
import rustc::syntax::ast;
import rustc::syntax::print::pprust;
import rustc::middle::ast_map;
export mk_pass;
fn mk_pass() -> pass {
run
}
fn run(
srv: astsrv::srv,
doc: doc::cratedoc
) -> doc::cratedoc {
let fold = fold::fold({
fold_fn: fold_fn
with *fold::default_seq_fold(srv)
});
fold.fold_crate(fold, doc)
}
fn fold_fn(
fold: fold::fold<astsrv::srv>,
doc: doc::fndoc
) -> doc::fndoc {
let srv = fold.ctxt;
~{
args: merge_arg_tys(srv, doc.id, doc.args),
return: merge_ret_ty(srv, doc.id, doc.return),
sig: get_fn_sig(srv, doc.id)
with *doc
}
}
fn get_fn_sig(srv: astsrv::srv, fn_id: doc::ast_id) -> option<str> {
astsrv::exec(srv) {|ctxt|
alt ctxt.map.get(fn_id) {
ast_map::node_item(@{
ident: ident,
node: ast::item_fn(decl, _, blk), _
}) {
some(pprust::fun_to_str(decl, ident, []))
}
}
}
}
#[test]
fn should_add_fn_sig() {
let source = "fn a() -> int { }";
let srv = astsrv::mk_srv_from_str(source);
let doc = extract::from_srv(srv, "");
let doc = run(srv, doc);
assert doc.topmod.fns[0].sig == some("fn a() -> int");
}
fn merge_ret_ty(
srv: astsrv::srv,
fn_id: doc::ast_id,
doc: doc::retdoc
) -> doc::retdoc {
alt get_ret_ty(srv, fn_id) {
some(ty) {
{
ty: some(ty)
with doc
}
}
none { doc }
}
}
fn get_ret_ty(srv: astsrv::srv, fn_id: doc::ast_id) -> option<str> {
astsrv::exec(srv) {|ctxt|
alt ctxt.map.get(fn_id) {
ast_map::node_item(@{
node: ast::item_fn(decl, _, _), _
}) {
if decl.output.node != ast::ty_nil {
some(pprust::ty_to_str(decl.output))
} else {
// Nil-typed return values are not interesting
none
}
}
}
}
}
#[test]
fn should_add_fn_ret_types() {
let source = "fn a() -> int { }";
let srv = astsrv::mk_srv_from_str(source);
let doc = extract::from_srv(srv, "");
let doc = run(srv, doc);
assert doc.topmod.fns[0].return.ty == some("int");
}
#[test]
fn should_not_add_nil_ret_type() {
let source = "fn a() { }";
let srv = astsrv::mk_srv_from_str(source);
let doc = extract::from_srv(srv, "");
let doc = run(srv, doc);
assert doc.topmod.fns[0].return.ty == none;
}
fn merge_arg_tys(
srv: astsrv::srv,
fn_id: doc::ast_id,
args: [doc::argdoc]
) -> [doc::argdoc] {
let tys = get_arg_tys(srv, fn_id);
vec::map2(args, tys) {|arg, ty|
// Sanity check that we're talking about the same args
assert arg.name == tuple::first(ty);
~{
ty: some(tuple::second(ty))
with *arg
}
}
}
fn get_arg_tys(srv: astsrv::srv, fn_id: doc::ast_id) -> [(str, str)] {
astsrv::exec(srv) {|ctxt|
alt ctxt.map.get(fn_id) {
ast_map::node_item(@{
node: ast::item_fn(decl, _, _), _
}) {
vec::map(decl.inputs) {|arg|
(arg.ident, pprust::ty_to_str(arg.ty))
}
}
}
}
}
#[test]
fn should_add_arg_types() {
let source = "fn a(b: int, c: bool) { }";
let srv = astsrv::mk_srv_from_str(source);
let doc = extract::from_srv(srv, "");
let doc = run(srv, doc);
let fn_ = doc.topmod.fns[0];
assert fn_.args[0].ty == some("int");
assert fn_.args[1].ty == some("bool");
}
|
