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import option;
import std::map;
import syntax::ast::*;
import syntax::ast_util;
import syntax::{visit, codemap};
enum ast_node {
node_item(@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),
node_res_ctor(@item),
}
type map = std::map::map<node_id, ast_node>;
type ctx = @{map: map, mutable local_id: uint};
fn map_crate(c: crate) -> map {
let cx = @{map: std::map::new_int_hash(),
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, _fk: visit::fn_kind, decl: fn_decl, _body: blk,
_sp: codemap::span, _id: node_id) {
for a in decl.inputs {
cx.map.insert(a.id, node_arg(a, cx.local_id));
cx.local_id += 1u;
}
}
fn map_local(cx: ctx, loc: @local) {
pat_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) {
pat_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_impl(_, _, _, ms) {
for m in ms { cx.map.insert(m.id, node_method(m)); }
}
item_res(_, _, _, dtor_id, ctor_id) {
cx.map.insert(ctor_id, node_res_ctor(i));
cx.map.insert(dtor_id, node_item(i));
}
_ { }
}
}
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 node_span(node: ast_node) -> codemap::span {
alt node {
node_item(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_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:
|
