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import option;
import std::smallintmap;
import syntax::ast::*;
import syntax::ast_util;
import syntax::{visit, codemap};
tag ast_node {
node_item(@item);
node_obj_ctor(@item);
node_native_item(@native_item);
node_method(@method);
node_expr(@expr);
// Locals are numbered, because the alias analysis needs to know in which
// order they are introduced.
node_arg(arg, uint);
node_local(uint);
}
type map = std::map::hashmap<node_id, ast_node>;
type ctx = @{map: map, mutable local_id: uint};
fn map_crate(c: crate) -> map {
// FIXME: This is using an adapter to convert the smallintmap
// interface to the hashmap interface. It would be better to just
// convert everything to use the smallintmap.
let cx = @{map: new_smallintmap_int_adapter::<ast_node>(),
mutable local_id: 0u};
let v_map = visit::mk_simple_visitor
(@{visit_item: bind map_item(cx, _),
visit_native_item: bind map_native_item(cx, _),
visit_expr: bind map_expr(cx, _),
visit_fn: bind map_fn(cx, _, _, _, _, _),
visit_local: bind map_local(cx, _),
visit_arm: bind map_arm(cx, _)
with *visit::default_simple_visitor()});
visit::visit_crate(c, (), v_map);
ret cx.map;
}
fn map_fn(cx: ctx, f: _fn, _tp: [ty_param], _sp: codemap::span,
_name: fn_ident, _id: node_id) {
for a in f.decl.inputs {
cx.map.insert(a.id, node_arg(a, cx.local_id));
cx.local_id += 1u;
}
}
fn map_local(cx: ctx, loc: @local) {
ast_util::pat_bindings(loc.node.pat) {|p|
cx.map.insert(p.id, node_local(cx.local_id));
cx.local_id += 1u;
};
}
fn map_arm(cx: ctx, arm: arm) {
ast_util::pat_bindings(arm.pats[0]) {|p|
cx.map.insert(p.id, node_local(cx.local_id));
cx.local_id += 1u;
};
}
fn map_item(cx: ctx, i: @item) {
cx.map.insert(i.id, node_item(i));
alt i.node {
item_obj(_, _, ctor_id) { cx.map.insert(ctor_id, node_obj_ctor(i)); }
item_impl(_, _, ms) {
for m in ms { cx.map.insert(m.node.id, node_method(m)); }
}
_ { }
}
}
fn map_native_item(cx: ctx, i: @native_item) {
cx.map.insert(i.id, node_native_item(i));
}
fn map_expr(cx: ctx, ex: @expr) {
cx.map.insert(ex.id, node_expr(ex));
}
fn new_smallintmap_int_adapter<copy V>() -> std::map::hashmap<int, V> {
let key_idx = fn (&&key: int) -> uint { key as uint };
let idx_key = fn (idx: uint) -> int { idx as int };
ret new_smallintmap_adapter(key_idx, idx_key);
}
// This creates an object with the hashmap interface backed
// by the smallintmap type, because I don't want to go through
// the entire codebase adapting all the callsites to the different
// interface.
// FIXME: hashmap and smallintmap should support the same interface.
fn new_smallintmap_adapter<copy K, copy V>(key_idx: fn(K) -> uint,
idx_key: fn(uint) -> K)
-> std::map::hashmap<K, V> {
obj adapter<copy K, copy V>(map: smallintmap::smallintmap<V>,
key_idx: fn(K) -> uint,
idx_key: fn(uint) -> K) {
fn size() -> uint { fail }
fn insert(key: K, value: V) -> bool {
let exists = smallintmap::contains_key(map, key_idx(key));
smallintmap::insert(map, key_idx(key), value);
ret !exists;
}
fn contains_key(key: K) -> bool {
ret smallintmap::contains_key(map, key_idx(key));
}
fn get(key: K) -> V { ret smallintmap::get(map, key_idx(key)); }
fn find(key: K) -> option::t<V> {
ret smallintmap::find(map, key_idx(key));
}
fn remove(_key: K) -> option::t<V> { fail }
fn rehash() { fail }
fn items(it: block(K, V)) {
let idx = 0u;
for item in map.v {
alt item {
option::some(elt) {
it(idx_key(idx), elt);
}
option::none. { }
}
idx += 1u;
}
}
fn keys(it: block(K)) {
let idx = 0u;
for item in map.v {
if item != option::none { it(idx_key(idx)); }
idx += 1u;
}
}
fn values(it: block(V)) {
for item in map.v {
alt item { option::some(elt) { it(elt); } _ {} }
}
}
}
let map = smallintmap::mk::<V>();
ret adapter(map, key_idx, idx_key);
}
fn node_span(node: ast_node) -> codemap::span {
alt node {
node_item(item) { item.span }
node_obj_ctor(item) { item.span }
node_native_item(nitem) { nitem.span }
node_expr(expr) { expr.span }
}
}
#[cfg(test)]
mod test {
import syntax::ast_util;
#[test]
fn test_node_span_item() {
let expected: codemap::span = ast_util::mk_sp(20u, 30u);
let node =
node_item(@{ident: "test",
attrs: [],
id: 0,
node: item_mod({view_items: [], items: []}),
span: expected});
assert (node_span(node) == expected);
}
#[test]
fn test_node_span_obj_ctor() {
let expected: codemap::span = ast_util::mk_sp(20u, 30u);
let node =
node_obj_ctor(@{ident: "test",
attrs: [],
id: 0,
node: item_mod({view_items: [], items: []}),
span: expected});
assert (node_span(node) == expected);
}
#[test]
fn test_node_span_native_item() {
let expected: codemap::span = ast_util::mk_sp(20u, 30u);
let node =
node_native_item(@{ident: "test",
attrs: [],
node: native_item_ty,
id: 0,
span: expected});
assert (node_span(node) == expected);
}
#[test]
fn test_node_span_expr() {
let expected: codemap::span = ast_util::mk_sp(20u, 30u);
let node = node_expr(@{id: 0, node: expr_break, span: expected});
assert (node_span(node) == expected);
}
}
// Local Variables:
// mode: rust
// fill-column: 78;
// indent-tabs-mode: nil
// c-basic-offset: 4
// buffer-file-coding-system: utf-8-unix
// End:
|
