1326 lines
42 KiB
Rust
1326 lines
42 KiB
Rust
import std.map.hashmap;
|
|
import std.option;
|
|
import std.option.some;
|
|
import std.option.none;
|
|
|
|
import util.common.new_str_hash;
|
|
import util.common.spanned;
|
|
import util.common.span;
|
|
import util.common.ty_mach;
|
|
import util.common.append;
|
|
|
|
import front.ast;
|
|
import front.ast.ident;
|
|
import front.ast.path;
|
|
import front.ast.mutability;
|
|
import front.ast.ty;
|
|
import front.ast.expr;
|
|
import front.ast.stmt;
|
|
import front.ast.block;
|
|
import front.ast.item;
|
|
import front.ast.view_item;
|
|
import front.ast.meta_item;
|
|
import front.ast.arg;
|
|
import front.ast.pat;
|
|
import front.ast.decl;
|
|
import front.ast.arm;
|
|
import front.ast.def;
|
|
import front.ast.def_id;
|
|
import front.ast.ann;
|
|
|
|
import std._uint;
|
|
import std._vec;
|
|
|
|
type ast_fold[ENV] =
|
|
@rec
|
|
(
|
|
// Path fold.
|
|
(fn(&ENV e, &span sp, ast.path_ p) -> path) fold_path,
|
|
|
|
// Type folds.
|
|
(fn(&ENV e, &span sp) -> @ty) fold_ty_nil,
|
|
(fn(&ENV e, &span sp) -> @ty) fold_ty_bool,
|
|
(fn(&ENV e, &span sp) -> @ty) fold_ty_int,
|
|
(fn(&ENV e, &span sp) -> @ty) fold_ty_uint,
|
|
(fn(&ENV e, &span sp, ty_mach tm) -> @ty) fold_ty_machine,
|
|
(fn(&ENV e, &span sp) -> @ty) fold_ty_char,
|
|
(fn(&ENV e, &span sp) -> @ty) fold_ty_str,
|
|
(fn(&ENV e, &span sp, @ty t) -> @ty) fold_ty_box,
|
|
(fn(&ENV e, &span sp, @ty t) -> @ty) fold_ty_vec,
|
|
|
|
(fn(&ENV e, &span sp, vec[@ty] elts) -> @ty) fold_ty_tup,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
vec[ast.ty_field] elts) -> @ty) fold_ty_rec,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
vec[ast.ty_method] meths) -> @ty) fold_ty_obj,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
vec[rec(ast.mode mode, @ty ty)] inputs,
|
|
@ty output) -> @ty) fold_ty_fn,
|
|
|
|
(fn(&ENV e, &span sp, ast.path p,
|
|
&option.t[def] d) -> @ty) fold_ty_path,
|
|
|
|
(fn(&ENV e, &span sp, @ty t) -> @ty) fold_ty_mutable,
|
|
|
|
// Expr folds.
|
|
(fn(&ENV e, &span sp,
|
|
vec[@expr] es, ann a) -> @expr) fold_expr_vec,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
vec[ast.elt] es, ann a) -> @expr) fold_expr_tup,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
vec[ast.field] fields, ann a) -> @expr) fold_expr_rec,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
@expr f, vec[@expr] args,
|
|
ann a) -> @expr) fold_expr_call,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
@expr f, vec[option.t[@expr]] args,
|
|
ann a) -> @expr) fold_expr_bind,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
ast.binop,
|
|
@expr lhs, @expr rhs,
|
|
ann a) -> @expr) fold_expr_binary,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
ast.unop, @expr e,
|
|
ann a) -> @expr) fold_expr_unary,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
@ast.lit, ann a) -> @expr) fold_expr_lit,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
@ast.expr e, @ast.ty ty,
|
|
ann a) -> @expr) fold_expr_cast,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
@expr cond, &block thn,
|
|
&vec[tup(@expr, block)] elifs,
|
|
&option.t[block] els,
|
|
ann a) -> @expr) fold_expr_if,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
@decl decl, @expr seq, &block body,
|
|
ann a) -> @expr) fold_expr_for,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
@expr cond, &block body,
|
|
ann a) -> @expr) fold_expr_while,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
&block body, @expr cond,
|
|
ann a) -> @expr) fold_expr_do_while,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
@expr e, vec[arm] arms,
|
|
ann a) -> @expr) fold_expr_alt,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
&block blk, ann a) -> @expr) fold_expr_block,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
@expr lhs, @expr rhs,
|
|
ann a) -> @expr) fold_expr_assign,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
ast.binop,
|
|
@expr lhs, @expr rhs,
|
|
ann a) -> @expr) fold_expr_assign_op,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
@expr e, ident i,
|
|
ann a) -> @expr) fold_expr_field,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
@expr e, @expr ix,
|
|
ann a) -> @expr) fold_expr_index,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
&path p,
|
|
&option.t[def] d,
|
|
ann a) -> @expr) fold_expr_path,
|
|
|
|
// Decl folds.
|
|
(fn(&ENV e, &span sp,
|
|
@ast.local local) -> @decl) fold_decl_local,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
@item item) -> @decl) fold_decl_item,
|
|
|
|
|
|
// Pat folds.
|
|
(fn(&ENV e, &span sp,
|
|
ann a) -> @pat) fold_pat_wild,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
ident i, def_id did, ann a) -> @pat) fold_pat_bind,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
path p, vec[@pat] args,
|
|
option.t[ast.variant_def] d,
|
|
ann a) -> @pat) fold_pat_tag,
|
|
|
|
|
|
// Stmt folds.
|
|
(fn(&ENV e, &span sp,
|
|
@decl decl) -> @stmt) fold_stmt_decl,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
&option.t[@expr] rv) -> @stmt) fold_stmt_ret,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
@expr e) -> @stmt) fold_stmt_log,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
@expr e) -> @stmt) fold_stmt_check_expr,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
@expr e) -> @stmt) fold_stmt_expr,
|
|
|
|
// Item folds.
|
|
(fn(&ENV e, &span sp, ident ident,
|
|
@ty t, @expr e,
|
|
def_id id, ann a) -> @item) fold_item_const,
|
|
|
|
(fn(&ENV e, &span sp, ident ident,
|
|
&ast._fn f,
|
|
vec[ast.ty_param] ty_params,
|
|
def_id id, ann a) -> @item) fold_item_fn,
|
|
|
|
(fn(&ENV e, &span sp, ident ident,
|
|
&ast._mod m, def_id id) -> @item) fold_item_mod,
|
|
|
|
(fn(&ENV e, &span sp, ident ident,
|
|
@ty t, vec[ast.ty_param] ty_params,
|
|
def_id id, ann a) -> @item) fold_item_ty,
|
|
|
|
(fn(&ENV e, &span sp, ident ident,
|
|
vec[ast.variant] variants,
|
|
vec[ast.ty_param] ty_params,
|
|
def_id id) -> @item) fold_item_tag,
|
|
|
|
(fn(&ENV e, &span sp, ident ident,
|
|
&ast._obj ob,
|
|
vec[ast.ty_param] ty_params,
|
|
def_id id, ann a) -> @item) fold_item_obj,
|
|
|
|
// View Item folds.
|
|
(fn(&ENV e, &span sp, ident ident,
|
|
vec[@meta_item] meta_items,
|
|
def_id id) -> @view_item) fold_view_item_use,
|
|
|
|
(fn(&ENV e, &span sp, ident i, vec[ident] idents,
|
|
def_id id, option.t[def]) -> @view_item) fold_view_item_import,
|
|
|
|
// Additional nodes.
|
|
(fn(&ENV e, &span sp,
|
|
&ast.block_) -> block) fold_block,
|
|
|
|
(fn(&ENV e, ast.effect effect,
|
|
bool is_iter,
|
|
vec[arg] inputs,
|
|
@ty output, &block body) -> ast._fn) fold_fn,
|
|
|
|
(fn(&ENV e, &ast._mod m) -> ast._mod) fold_mod,
|
|
|
|
(fn(&ENV e, &span sp,
|
|
&ast._mod m) -> @ast.crate) fold_crate,
|
|
|
|
(fn(&ENV e,
|
|
vec[ast.obj_field] fields,
|
|
vec[@ast.method] methods) -> ast._obj) fold_obj,
|
|
|
|
// Env updates.
|
|
(fn(&ENV e, @ast.crate c) -> ENV) update_env_for_crate,
|
|
(fn(&ENV e, @item i) -> ENV) update_env_for_item,
|
|
(fn(&ENV e, @view_item i) -> ENV) update_env_for_view_item,
|
|
(fn(&ENV e, &block b) -> ENV) update_env_for_block,
|
|
(fn(&ENV e, @stmt s) -> ENV) update_env_for_stmt,
|
|
(fn(&ENV e, @decl i) -> ENV) update_env_for_decl,
|
|
(fn(&ENV e, @pat p) -> ENV) update_env_for_pat,
|
|
(fn(&ENV e, &arm a) -> ENV) update_env_for_arm,
|
|
(fn(&ENV e, @expr x) -> ENV) update_env_for_expr,
|
|
(fn(&ENV e, @ty t) -> ENV) update_env_for_ty,
|
|
|
|
// Traversal control.
|
|
(fn(&ENV v) -> bool) keep_going
|
|
);
|
|
|
|
|
|
//// Fold drivers.
|
|
|
|
fn fold_path[ENV](&ENV env, ast_fold[ENV] fld, &path p) -> path {
|
|
let vec[@ast.ty] tys_ = vec();
|
|
for (@ast.ty t in p.node.types) {
|
|
append[@ast.ty](tys_, fold_ty(env, fld, t));
|
|
}
|
|
let ast.path_ p_ = rec(idents=p.node.idents, types=tys_);
|
|
ret fld.fold_path(env, p.span, p_);
|
|
}
|
|
|
|
fn fold_ty[ENV](&ENV env, ast_fold[ENV] fld, @ty t) -> @ty {
|
|
let ENV env_ = fld.update_env_for_ty(env, t);
|
|
|
|
if (!fld.keep_going(env_)) {
|
|
ret t;
|
|
}
|
|
|
|
alt (t.node) {
|
|
case (ast.ty_nil) { ret fld.fold_ty_nil(env_, t.span); }
|
|
case (ast.ty_bool) { ret fld.fold_ty_bool(env_, t.span); }
|
|
case (ast.ty_int) { ret fld.fold_ty_int(env_, t.span); }
|
|
case (ast.ty_uint) { ret fld.fold_ty_uint(env_, t.span); }
|
|
|
|
case (ast.ty_machine(?m)) {
|
|
ret fld.fold_ty_machine(env_, t.span, m);
|
|
}
|
|
|
|
case (ast.ty_char) { ret fld.fold_ty_char(env_, t.span); }
|
|
case (ast.ty_str) { ret fld.fold_ty_str(env_, t.span); }
|
|
|
|
case (ast.ty_box(?ty)) {
|
|
auto ty_ = fold_ty(env, fld, ty);
|
|
ret fld.fold_ty_box(env_, t.span, ty_);
|
|
}
|
|
|
|
case (ast.ty_vec(?ty)) {
|
|
auto ty_ = fold_ty(env, fld, ty);
|
|
ret fld.fold_ty_vec(env_, t.span, ty_);
|
|
}
|
|
|
|
case (ast.ty_tup(?elts)) {
|
|
let vec[@ty] elts_ = vec();
|
|
for (@ty elt in elts) {
|
|
append[@ty](elts_,fold_ty(env, fld, elt));
|
|
}
|
|
ret fld.fold_ty_tup(env_, t.span, elts_);
|
|
}
|
|
|
|
case (ast.ty_rec(?flds)) {
|
|
let vec[ast.ty_field] flds_ = vec();
|
|
for (ast.ty_field f in flds) {
|
|
append[ast.ty_field]
|
|
(flds_, rec(ty=fold_ty(env, fld, f.ty) with f));
|
|
}
|
|
ret fld.fold_ty_rec(env_, t.span, flds_);
|
|
}
|
|
|
|
case (ast.ty_obj(?meths)) {
|
|
let vec[ast.ty_method] meths_ = vec();
|
|
for (ast.ty_method m in meths) {
|
|
auto tfn = fold_ty_fn(env_, fld, t.span, m.inputs, m.output);
|
|
alt (tfn.node) {
|
|
case (ast.ty_fn(?ins, ?out)) {
|
|
append[ast.ty_method]
|
|
(meths_, rec(inputs=ins, output=out with m));
|
|
}
|
|
}
|
|
}
|
|
ret fld.fold_ty_obj(env_, t.span, meths_);
|
|
}
|
|
|
|
case (ast.ty_path(?pth, ?ref_opt)) {
|
|
auto pth_ = fold_path(env, fld, pth);
|
|
ret fld.fold_ty_path(env_, t.span, pth_, ref_opt);
|
|
}
|
|
|
|
case (ast.ty_mutable(?ty)) {
|
|
auto ty_ = fold_ty(env, fld, ty);
|
|
ret fld.fold_ty_mutable(env_, t.span, ty_);
|
|
}
|
|
|
|
case (ast.ty_fn(?inputs, ?output)) {
|
|
ret fold_ty_fn(env_, fld, t.span, inputs, output);
|
|
}
|
|
}
|
|
}
|
|
|
|
fn fold_ty_fn[ENV](&ENV env, ast_fold[ENV] fld, &span sp,
|
|
vec[rec(ast.mode mode, @ty ty)] inputs,
|
|
@ty output) -> @ty {
|
|
auto output_ = fold_ty(env, fld, output);
|
|
let vec[rec(ast.mode mode, @ty ty)] inputs_ = vec();
|
|
for (rec(ast.mode mode, @ty ty) input in inputs) {
|
|
auto ty_ = fold_ty(env, fld, input.ty);
|
|
auto input_ = rec(ty=ty_ with input);
|
|
inputs_ += vec(input_);
|
|
}
|
|
ret fld.fold_ty_fn(env, sp, inputs_, output_);
|
|
}
|
|
|
|
fn fold_decl[ENV](&ENV env, ast_fold[ENV] fld, @decl d) -> @decl {
|
|
let ENV env_ = fld.update_env_for_decl(env, d);
|
|
|
|
if (!fld.keep_going(env_)) {
|
|
ret d;
|
|
}
|
|
|
|
alt (d.node) {
|
|
case (ast.decl_local(?local)) {
|
|
auto ty_ = none[@ast.ty];
|
|
auto init_ = none[@ast.expr];
|
|
alt (local.ty) {
|
|
case (some[@ast.ty](?t)) {
|
|
ty_ = some[@ast.ty](fold_ty(env, fld, t));
|
|
}
|
|
case (_) { /* fall through */ }
|
|
}
|
|
alt (local.init) {
|
|
case (some[@ast.expr](?e)) {
|
|
init_ = some[@ast.expr](fold_expr(env, fld, e));
|
|
}
|
|
case (_) { /* fall through */ }
|
|
}
|
|
let @ast.local local_ = @rec(ty=ty_, init=init_ with *local);
|
|
ret fld.fold_decl_local(env_, d.span, local_);
|
|
}
|
|
|
|
case (ast.decl_item(?item)) {
|
|
auto item_ = fold_item(env_, fld, item);
|
|
ret fld.fold_decl_item(env_, d.span, item_);
|
|
}
|
|
}
|
|
|
|
fail;
|
|
}
|
|
|
|
fn fold_pat[ENV](&ENV env, ast_fold[ENV] fld, @ast.pat p) -> @ast.pat {
|
|
let ENV env_ = fld.update_env_for_pat(env, p);
|
|
|
|
if (!fld.keep_going(env_)) {
|
|
ret p;
|
|
}
|
|
|
|
alt (p.node) {
|
|
case (ast.pat_wild(?t)) { ret fld.fold_pat_wild(env_, p.span, t); }
|
|
case (ast.pat_bind(?id, ?did, ?t)) {
|
|
ret fld.fold_pat_bind(env_, p.span, id, did, t);
|
|
}
|
|
case (ast.pat_tag(?path, ?pats, ?d, ?t)) {
|
|
let vec[@ast.pat] ppats = vec();
|
|
for (@ast.pat pat in pats) {
|
|
ppats += vec(fold_pat(env_, fld, pat));
|
|
}
|
|
ret fld.fold_pat_tag(env_, p.span, path, ppats, d, t);
|
|
}
|
|
}
|
|
}
|
|
|
|
fn fold_exprs[ENV](&ENV env, ast_fold[ENV] fld, vec[@expr] es) -> vec[@expr] {
|
|
let vec[@expr] exprs = vec();
|
|
for (@expr e in es) {
|
|
append[@expr](exprs, fold_expr(env, fld, e));
|
|
}
|
|
ret exprs;
|
|
}
|
|
|
|
fn fold_tup_elt[ENV](&ENV env, ast_fold[ENV] fld, &ast.elt e) -> ast.elt {
|
|
ret rec(expr=fold_expr(env, fld, e.expr) with e);
|
|
}
|
|
|
|
fn fold_rec_field[ENV](&ENV env, ast_fold[ENV] fld, &ast.field f)
|
|
-> ast.field {
|
|
ret rec(expr=fold_expr(env, fld, f.expr) with f);
|
|
}
|
|
|
|
fn fold_expr[ENV](&ENV env, ast_fold[ENV] fld, &@expr e) -> @expr {
|
|
|
|
let ENV env_ = fld.update_env_for_expr(env, e);
|
|
|
|
if (!fld.keep_going(env_)) {
|
|
ret e;
|
|
}
|
|
|
|
alt (e.node) {
|
|
case (ast.expr_vec(?es, ?t)) {
|
|
auto ees = fold_exprs(env_, fld, es);
|
|
ret fld.fold_expr_vec(env_, e.span, ees, t);
|
|
}
|
|
|
|
case (ast.expr_tup(?es, ?t)) {
|
|
let vec[ast.elt] elts = vec();
|
|
for (ast.elt e in es) {
|
|
elts += fold_tup_elt[ENV](env, fld, e);
|
|
}
|
|
ret fld.fold_expr_tup(env_, e.span, elts, t);
|
|
}
|
|
|
|
case (ast.expr_rec(?fs, ?t)) {
|
|
let vec[ast.field] fields = vec();
|
|
for (ast.field f in fs) {
|
|
fields += fold_rec_field(env, fld, f);
|
|
}
|
|
ret fld.fold_expr_rec(env_, e.span, fields, t);
|
|
}
|
|
|
|
case (ast.expr_call(?f, ?args, ?t)) {
|
|
auto ff = fold_expr(env_, fld, f);
|
|
auto aargs = fold_exprs(env_, fld, args);
|
|
ret fld.fold_expr_call(env_, e.span, ff, aargs, t);
|
|
}
|
|
|
|
case (ast.expr_bind(?f, ?args_opt, ?t)) {
|
|
auto ff = fold_expr(env_, fld, f);
|
|
let vec[option.t[@ast.expr]] aargs_opt = vec();
|
|
for (option.t[@ast.expr] t_opt in args_opt) {
|
|
alt (t_opt) {
|
|
case (none[@ast.expr]) {
|
|
aargs_opt += none[@ast.expr];
|
|
}
|
|
case (some[@ast.expr](?e)) {
|
|
aargs_opt += vec(some(fold_expr(env_, fld, e)));
|
|
}
|
|
case (none[@ast.expr]) { /* empty */ }
|
|
}
|
|
}
|
|
ret fld.fold_expr_bind(env_, e.span, ff, aargs_opt, t);
|
|
}
|
|
|
|
case (ast.expr_binary(?op, ?a, ?b, ?t)) {
|
|
auto aa = fold_expr(env_, fld, a);
|
|
auto bb = fold_expr(env_, fld, b);
|
|
ret fld.fold_expr_binary(env_, e.span, op, aa, bb, t);
|
|
}
|
|
|
|
case (ast.expr_unary(?op, ?a, ?t)) {
|
|
auto aa = fold_expr(env_, fld, a);
|
|
ret fld.fold_expr_unary(env_, e.span, op, aa, t);
|
|
}
|
|
|
|
case (ast.expr_lit(?lit, ?t)) {
|
|
ret fld.fold_expr_lit(env_, e.span, lit, t);
|
|
}
|
|
|
|
case (ast.expr_cast(?e, ?t, ?at)) {
|
|
auto ee = fold_expr(env_, fld, e);
|
|
auto tt = fold_ty(env, fld, t);
|
|
ret fld.fold_expr_cast(env_, e.span, ee, tt, at);
|
|
}
|
|
|
|
case (ast.expr_if(?cnd, ?thn, ?elifs, ?els, ?t)) {
|
|
auto ccnd = fold_expr(env_, fld, cnd);
|
|
auto tthn = fold_block(env_, fld, thn);
|
|
|
|
let vec[tup(@ast.expr, ast.block)] eelifs = vec();
|
|
for (tup(@expr, block) elif in elifs) {
|
|
auto elifcnd = elif._0;
|
|
auto elifthn = elif._1;
|
|
auto elifccnd = fold_expr(env_, fld, elifcnd);
|
|
auto eliftthn = fold_block(env_, fld, elifthn);
|
|
eelifs += tup(elifccnd, eliftthn);
|
|
}
|
|
|
|
auto eels = none[block];
|
|
alt (els) {
|
|
case (some[block](?b)) {
|
|
eels = some(fold_block(env_, fld, b));
|
|
}
|
|
case (_) { /* fall through */ }
|
|
}
|
|
ret fld.fold_expr_if(env_, e.span, ccnd, tthn, eelifs, eels, t);
|
|
}
|
|
|
|
case (ast.expr_for(?decl, ?seq, ?body, ?t)) {
|
|
auto ddecl = fold_decl(env_, fld, decl);
|
|
auto sseq = fold_expr(env_, fld, seq);
|
|
auto bbody = fold_block(env_, fld, body);
|
|
ret fld.fold_expr_for(env_, e.span, ddecl, sseq, bbody, t);
|
|
}
|
|
|
|
case (ast.expr_while(?cnd, ?body, ?t)) {
|
|
auto ccnd = fold_expr(env_, fld, cnd);
|
|
auto bbody = fold_block(env_, fld, body);
|
|
ret fld.fold_expr_while(env_, e.span, ccnd, bbody, t);
|
|
}
|
|
|
|
case (ast.expr_do_while(?body, ?cnd, ?t)) {
|
|
auto bbody = fold_block(env_, fld, body);
|
|
auto ccnd = fold_expr(env_, fld, cnd);
|
|
ret fld.fold_expr_do_while(env_, e.span, bbody, ccnd, t);
|
|
}
|
|
|
|
case (ast.expr_alt(?expr, ?arms, ?t)) {
|
|
auto eexpr = fold_expr(env_, fld, expr);
|
|
let vec[ast.arm] aarms = vec();
|
|
for (ast.arm a in arms) {
|
|
aarms += vec(fold_arm(env_, fld, a));
|
|
}
|
|
ret fld.fold_expr_alt(env_, e.span, eexpr, aarms, t);
|
|
}
|
|
|
|
case (ast.expr_block(?b, ?t)) {
|
|
auto bb = fold_block(env_, fld, b);
|
|
ret fld.fold_expr_block(env_, e.span, bb, t);
|
|
}
|
|
|
|
case (ast.expr_assign(?lhs, ?rhs, ?t)) {
|
|
auto llhs = fold_expr(env_, fld, lhs);
|
|
auto rrhs = fold_expr(env_, fld, rhs);
|
|
ret fld.fold_expr_assign(env_, e.span, llhs, rrhs, t);
|
|
}
|
|
|
|
case (ast.expr_assign_op(?op, ?lhs, ?rhs, ?t)) {
|
|
auto llhs = fold_expr(env_, fld, lhs);
|
|
auto rrhs = fold_expr(env_, fld, rhs);
|
|
ret fld.fold_expr_assign_op(env_, e.span, op, llhs, rrhs, t);
|
|
}
|
|
|
|
case (ast.expr_field(?e, ?i, ?t)) {
|
|
auto ee = fold_expr(env_, fld, e);
|
|
ret fld.fold_expr_field(env_, e.span, ee, i, t);
|
|
}
|
|
|
|
case (ast.expr_index(?e, ?ix, ?t)) {
|
|
auto ee = fold_expr(env_, fld, e);
|
|
auto iix = fold_expr(env_, fld, ix);
|
|
ret fld.fold_expr_index(env_, e.span, ee, iix, t);
|
|
}
|
|
|
|
case (ast.expr_path(?p, ?r, ?t)) {
|
|
auto p_ = fold_path(env_, fld, p);
|
|
ret fld.fold_expr_path(env_, e.span, p_, r, t);
|
|
}
|
|
}
|
|
|
|
ret e;
|
|
}
|
|
|
|
|
|
fn fold_stmt[ENV](&ENV env, ast_fold[ENV] fld, &@stmt s) -> @stmt {
|
|
|
|
let ENV env_ = fld.update_env_for_stmt(env, s);
|
|
|
|
if (!fld.keep_going(env_)) {
|
|
ret s;
|
|
}
|
|
|
|
alt (s.node) {
|
|
case (ast.stmt_decl(?d)) {
|
|
auto dd = fold_decl(env_, fld, d);
|
|
ret fld.fold_stmt_decl(env_, s.span, dd);
|
|
}
|
|
|
|
case (ast.stmt_ret(?oe)) {
|
|
auto oee = none[@expr];
|
|
alt (oe) {
|
|
case (some[@expr](?e)) {
|
|
oee = some(fold_expr(env_, fld, e));
|
|
}
|
|
case (_) { /* fall through */ }
|
|
}
|
|
ret fld.fold_stmt_ret(env_, s.span, oee);
|
|
}
|
|
|
|
case (ast.stmt_log(?e)) {
|
|
auto ee = fold_expr(env_, fld, e);
|
|
ret fld.fold_stmt_log(env_, s.span, ee);
|
|
}
|
|
|
|
case (ast.stmt_check_expr(?e)) {
|
|
auto ee = fold_expr(env_, fld, e);
|
|
ret fld.fold_stmt_check_expr(env_, s.span, ee);
|
|
}
|
|
|
|
case (ast.stmt_fail) {
|
|
ret s;
|
|
}
|
|
|
|
case (ast.stmt_expr(?e)) {
|
|
auto ee = fold_expr(env_, fld, e);
|
|
ret fld.fold_stmt_expr(env_, s.span, ee);
|
|
}
|
|
}
|
|
ret s;
|
|
}
|
|
|
|
fn fold_block[ENV](&ENV env, ast_fold[ENV] fld, &block blk) -> block {
|
|
|
|
let ENV env_ = fld.update_env_for_block(env, blk);
|
|
|
|
if (!fld.keep_going(env_)) {
|
|
ret blk;
|
|
}
|
|
|
|
let vec[@ast.stmt] stmts = vec();
|
|
for (@ast.stmt s in blk.node.stmts) {
|
|
append[@ast.stmt](stmts, fold_stmt[ENV](env_, fld, s));
|
|
}
|
|
|
|
auto expr = none[@ast.expr];
|
|
alt (blk.node.expr) {
|
|
case (some[@ast.expr](?e)) {
|
|
expr = some[@ast.expr](fold_expr[ENV](env_, fld, e));
|
|
}
|
|
case (none[@ast.expr]) {
|
|
// empty
|
|
}
|
|
}
|
|
|
|
// FIXME: should we reindex?
|
|
ret respan(blk.span, rec(stmts=stmts, expr=expr, index=blk.node.index));
|
|
}
|
|
|
|
fn fold_arm[ENV](&ENV env, ast_fold[ENV] fld, &arm a) -> arm {
|
|
let ENV env_ = fld.update_env_for_arm(env, a);
|
|
auto ppat = fold_pat(env_, fld, a.pat);
|
|
auto bblock = fold_block(env_, fld, a.block);
|
|
ret rec(pat=ppat, block=bblock, index=a.index);
|
|
}
|
|
|
|
fn fold_arg[ENV](&ENV env, ast_fold[ENV] fld, &arg a) -> arg {
|
|
auto ty = fold_ty(env, fld, a.ty);
|
|
ret rec(ty=ty with a);
|
|
}
|
|
|
|
|
|
fn fold_fn[ENV](&ENV env, ast_fold[ENV] fld, &ast._fn f) -> ast._fn {
|
|
|
|
let vec[ast.arg] inputs = vec();
|
|
for (ast.arg a in f.inputs) {
|
|
inputs += fold_arg(env, fld, a);
|
|
}
|
|
auto output = fold_ty[ENV](env, fld, f.output);
|
|
auto body = fold_block[ENV](env, fld, f.body);
|
|
|
|
ret fld.fold_fn(env, f.effect, f.is_iter, inputs, output, body);
|
|
}
|
|
|
|
|
|
fn fold_obj_field[ENV](&ENV env, ast_fold[ENV] fld,
|
|
&ast.obj_field f) -> ast.obj_field {
|
|
auto ty = fold_ty(env, fld, f.ty);
|
|
ret rec(ty=ty with f);
|
|
}
|
|
|
|
|
|
fn fold_method[ENV](&ENV env, ast_fold[ENV] fld,
|
|
@ast.method m) -> @ast.method {
|
|
auto meth = fold_fn(env, fld, m.node.meth);
|
|
ret @rec(node=rec(meth=meth with m.node) with *m);
|
|
}
|
|
|
|
|
|
fn fold_obj[ENV](&ENV env, ast_fold[ENV] fld, &ast._obj ob) -> ast._obj {
|
|
|
|
let vec[ast.obj_field] fields = vec();
|
|
let vec[@ast.method] meths = vec();
|
|
for (ast.obj_field f in ob.fields) {
|
|
fields += fold_obj_field(env, fld, f);
|
|
}
|
|
let vec[ast.ty_param] tp = vec();
|
|
for (@ast.method m in ob.methods) {
|
|
// Fake-up an ast.item for this method.
|
|
// FIXME: this is kinda awful. Maybe we should reformulate
|
|
// the way we store methods in the AST?
|
|
let @ast.item i = @rec(node=ast.item_fn(m.node.ident,
|
|
m.node.meth,
|
|
tp,
|
|
m.node.id,
|
|
m.node.ann),
|
|
span=m.span);
|
|
let ENV _env = fld.update_env_for_item(env, i);
|
|
append[@ast.method](meths, fold_method(_env, fld, m));
|
|
}
|
|
ret fld.fold_obj(env, fields, meths);
|
|
}
|
|
|
|
fn fold_view_item[ENV](&ENV env, ast_fold[ENV] fld, @view_item vi)
|
|
-> @view_item {
|
|
|
|
let ENV env_ = fld.update_env_for_view_item(env, vi);
|
|
|
|
if (!fld.keep_going(env_)) {
|
|
ret vi;
|
|
}
|
|
|
|
alt (vi.node) {
|
|
case (ast.view_item_use(?ident, ?meta_items, ?def_id)) {
|
|
ret fld.fold_view_item_use(env_, vi.span, ident, meta_items,
|
|
def_id);
|
|
}
|
|
case (ast.view_item_import(?def_ident, ?idents, ?def_id,
|
|
?target_def)) {
|
|
ret fld.fold_view_item_import(env_, vi.span, def_ident, idents,
|
|
def_id, target_def);
|
|
}
|
|
}
|
|
|
|
fail;
|
|
}
|
|
|
|
fn fold_item[ENV](&ENV env, ast_fold[ENV] fld, @item i) -> @item {
|
|
|
|
let ENV env_ = fld.update_env_for_item(env, i);
|
|
|
|
if (!fld.keep_going(env_)) {
|
|
ret i;
|
|
}
|
|
|
|
alt (i.node) {
|
|
|
|
case (ast.item_const(?ident, ?t, ?e, ?id, ?ann)) {
|
|
let @ast.ty t_ = fold_ty[ENV](env_, fld, t);
|
|
let @ast.expr e_ = fold_expr(env_, fld, e);
|
|
ret fld.fold_item_const(env_, i.span, ident, t_, e_, id, ann);
|
|
}
|
|
|
|
case (ast.item_fn(?ident, ?ff, ?tps, ?id, ?ann)) {
|
|
let ast._fn ff_ = fold_fn[ENV](env_, fld, ff);
|
|
ret fld.fold_item_fn(env_, i.span, ident, ff_, tps, id, ann);
|
|
}
|
|
|
|
case (ast.item_mod(?ident, ?mm, ?id)) {
|
|
let ast._mod mm_ = fold_mod[ENV](env_, fld, mm);
|
|
ret fld.fold_item_mod(env_, i.span, ident, mm_, id);
|
|
}
|
|
|
|
case (ast.item_ty(?ident, ?ty, ?params, ?id, ?ann)) {
|
|
let @ast.ty ty_ = fold_ty[ENV](env_, fld, ty);
|
|
ret fld.fold_item_ty(env_, i.span, ident, ty_, params, id, ann);
|
|
}
|
|
|
|
case (ast.item_tag(?ident, ?variants, ?ty_params, ?id)) {
|
|
let vec[ast.variant] new_variants = vec();
|
|
for (ast.variant v in variants) {
|
|
let vec[ast.variant_arg] new_args = vec();
|
|
for (ast.variant_arg va in v.args) {
|
|
auto new_ty = fold_ty[ENV](env_, fld, va.ty);
|
|
new_args += vec(rec(ty=new_ty, id=va.id));
|
|
}
|
|
new_variants += rec(name=v.name, args=new_args, id=v.id,
|
|
ann=v.ann);
|
|
}
|
|
ret fld.fold_item_tag(env_, i.span, ident, new_variants,
|
|
ty_params, id);
|
|
}
|
|
|
|
case (ast.item_obj(?ident, ?ob, ?tps, ?id, ?ann)) {
|
|
let ast._obj ob_ = fold_obj[ENV](env_, fld, ob);
|
|
ret fld.fold_item_obj(env_, i.span, ident, ob_, tps, id, ann);
|
|
}
|
|
|
|
}
|
|
|
|
fail;
|
|
}
|
|
|
|
|
|
fn fold_mod[ENV](&ENV e, ast_fold[ENV] fld, &ast._mod m) -> ast._mod {
|
|
|
|
let vec[@view_item] view_items = vec();
|
|
let vec[@item] items = vec();
|
|
auto index = new_str_hash[ast.mod_index_entry]();
|
|
|
|
for (@view_item vi in m.view_items) {
|
|
auto new_vi = fold_view_item[ENV](e, fld, vi);
|
|
append[@view_item](view_items, new_vi);
|
|
ast.index_view_item(index, new_vi);
|
|
}
|
|
|
|
for (@item i in m.items) {
|
|
auto new_item = fold_item[ENV](e, fld, i);
|
|
append[@item](items, new_item);
|
|
ast.index_item(index, new_item);
|
|
}
|
|
|
|
ret fld.fold_mod(e, rec(view_items=view_items, items=items, index=index));
|
|
}
|
|
|
|
fn fold_crate[ENV](&ENV env, ast_fold[ENV] fld, @ast.crate c) -> @ast.crate {
|
|
let ENV env_ = fld.update_env_for_crate(env, c);
|
|
let ast._mod m = fold_mod[ENV](env_, fld, c.node.module);
|
|
ret fld.fold_crate(env_, c.span, m);
|
|
}
|
|
|
|
//// Identity folds.
|
|
|
|
fn respan[T](&span sp, &T t) -> spanned[T] {
|
|
ret rec(node=t, span=sp);
|
|
}
|
|
|
|
|
|
// Path identity.
|
|
|
|
fn identity_fold_path[ENV](&ENV env, &span sp, ast.path_ p) -> path {
|
|
ret respan(sp, p);
|
|
}
|
|
|
|
// Type identities.
|
|
|
|
fn identity_fold_ty_nil[ENV](&ENV env, &span sp) -> @ty {
|
|
ret @respan(sp, ast.ty_nil);
|
|
}
|
|
|
|
fn identity_fold_ty_bool[ENV](&ENV env, &span sp) -> @ty {
|
|
ret @respan(sp, ast.ty_bool);
|
|
}
|
|
|
|
fn identity_fold_ty_int[ENV](&ENV env, &span sp) -> @ty {
|
|
ret @respan(sp, ast.ty_int);
|
|
}
|
|
|
|
fn identity_fold_ty_uint[ENV](&ENV env, &span sp) -> @ty {
|
|
ret @respan(sp, ast.ty_uint);
|
|
}
|
|
|
|
fn identity_fold_ty_machine[ENV](&ENV env, &span sp,
|
|
ty_mach tm) -> @ty {
|
|
ret @respan(sp, ast.ty_machine(tm));
|
|
}
|
|
|
|
fn identity_fold_ty_char[ENV](&ENV env, &span sp) -> @ty {
|
|
ret @respan(sp, ast.ty_char);
|
|
}
|
|
|
|
fn identity_fold_ty_str[ENV](&ENV env, &span sp) -> @ty {
|
|
ret @respan(sp, ast.ty_str);
|
|
}
|
|
|
|
fn identity_fold_ty_box[ENV](&ENV env, &span sp, @ty t) -> @ty {
|
|
ret @respan(sp, ast.ty_box(t));
|
|
}
|
|
|
|
fn identity_fold_ty_vec[ENV](&ENV env, &span sp, @ty t) -> @ty {
|
|
ret @respan(sp, ast.ty_vec(t));
|
|
}
|
|
|
|
fn identity_fold_ty_tup[ENV](&ENV env, &span sp,
|
|
vec[@ty] elts) -> @ty {
|
|
ret @respan(sp, ast.ty_tup(elts));
|
|
}
|
|
|
|
fn identity_fold_ty_rec[ENV](&ENV env, &span sp,
|
|
vec[ast.ty_field] elts) -> @ty {
|
|
ret @respan(sp, ast.ty_rec(elts));
|
|
}
|
|
|
|
fn identity_fold_ty_obj[ENV](&ENV env, &span sp,
|
|
vec[ast.ty_method] meths) -> @ty {
|
|
ret @respan(sp, ast.ty_obj(meths));
|
|
}
|
|
|
|
fn identity_fold_ty_fn[ENV](&ENV env, &span sp,
|
|
vec[rec(ast.mode mode, @ty ty)] inputs,
|
|
@ty output) -> @ty {
|
|
ret @respan(sp, ast.ty_fn(inputs, output));
|
|
}
|
|
|
|
fn identity_fold_ty_path[ENV](&ENV env, &span sp, ast.path p,
|
|
&option.t[def] d) -> @ty {
|
|
ret @respan(sp, ast.ty_path(p, d));
|
|
}
|
|
|
|
fn identity_fold_ty_mutable[ENV](&ENV env, &span sp, @ty t) -> @ty {
|
|
ret @respan(sp, ast.ty_mutable(t));
|
|
}
|
|
|
|
|
|
// Expr identities.
|
|
|
|
fn identity_fold_expr_vec[ENV](&ENV env, &span sp, vec[@expr] es,
|
|
ann a) -> @expr {
|
|
ret @respan(sp, ast.expr_vec(es, a));
|
|
}
|
|
|
|
fn identity_fold_expr_tup[ENV](&ENV env, &span sp,
|
|
vec[ast.elt] es, ann a) -> @expr {
|
|
ret @respan(sp, ast.expr_tup(es, a));
|
|
}
|
|
|
|
fn identity_fold_expr_rec[ENV](&ENV env, &span sp,
|
|
vec[ast.field] fields, ann a) -> @expr {
|
|
ret @respan(sp, ast.expr_rec(fields, a));
|
|
}
|
|
|
|
fn identity_fold_expr_call[ENV](&ENV env, &span sp, @expr f,
|
|
vec[@expr] args, ann a) -> @expr {
|
|
ret @respan(sp, ast.expr_call(f, args, a));
|
|
}
|
|
|
|
fn identity_fold_expr_bind[ENV](&ENV env, &span sp, @expr f,
|
|
vec[option.t[@expr]] args_opt, ann a)
|
|
-> @expr {
|
|
ret @respan(sp, ast.expr_bind(f, args_opt, a));
|
|
}
|
|
|
|
fn identity_fold_expr_binary[ENV](&ENV env, &span sp, ast.binop b,
|
|
@expr lhs, @expr rhs,
|
|
ann a) -> @expr {
|
|
ret @respan(sp, ast.expr_binary(b, lhs, rhs, a));
|
|
}
|
|
|
|
fn identity_fold_expr_unary[ENV](&ENV env, &span sp,
|
|
ast.unop u, @expr e, ann a)
|
|
-> @expr {
|
|
ret @respan(sp, ast.expr_unary(u, e, a));
|
|
}
|
|
|
|
fn identity_fold_expr_lit[ENV](&ENV env, &span sp, @ast.lit lit,
|
|
ann a) -> @expr {
|
|
ret @respan(sp, ast.expr_lit(lit, a));
|
|
}
|
|
|
|
fn identity_fold_expr_cast[ENV](&ENV env, &span sp, @ast.expr e,
|
|
@ast.ty t, ann a) -> @expr {
|
|
ret @respan(sp, ast.expr_cast(e, t, a));
|
|
}
|
|
|
|
fn identity_fold_expr_if[ENV](&ENV env, &span sp,
|
|
@expr cond, &block thn,
|
|
&vec[tup(@expr, block)] elifs,
|
|
&option.t[block] els, ann a) -> @expr {
|
|
ret @respan(sp, ast.expr_if(cond, thn, elifs, els, a));
|
|
}
|
|
|
|
fn identity_fold_expr_for[ENV](&ENV env, &span sp,
|
|
@decl d, @expr seq,
|
|
&block body, ann a) -> @expr {
|
|
ret @respan(sp, ast.expr_for(d, seq, body, a));
|
|
}
|
|
|
|
fn identity_fold_expr_while[ENV](&ENV env, &span sp,
|
|
@expr cond, &block body, ann a) -> @expr {
|
|
ret @respan(sp, ast.expr_while(cond, body, a));
|
|
}
|
|
|
|
fn identity_fold_expr_do_while[ENV](&ENV env, &span sp,
|
|
&block body, @expr cond, ann a) -> @expr {
|
|
ret @respan(sp, ast.expr_do_while(body, cond, a));
|
|
}
|
|
|
|
fn identity_fold_expr_alt[ENV](&ENV env, &span sp,
|
|
@expr e, vec[arm] arms, ann a) -> @expr {
|
|
ret @respan(sp, ast.expr_alt(e, arms, a));
|
|
}
|
|
|
|
fn identity_fold_expr_block[ENV](&ENV env, &span sp, &block blk,
|
|
ann a) -> @expr {
|
|
ret @respan(sp, ast.expr_block(blk, a));
|
|
}
|
|
|
|
fn identity_fold_expr_assign[ENV](&ENV env, &span sp,
|
|
@expr lhs, @expr rhs, ann a)
|
|
-> @expr {
|
|
ret @respan(sp, ast.expr_assign(lhs, rhs, a));
|
|
}
|
|
|
|
fn identity_fold_expr_assign_op[ENV](&ENV env, &span sp, ast.binop op,
|
|
@expr lhs, @expr rhs, ann a)
|
|
-> @expr {
|
|
ret @respan(sp, ast.expr_assign_op(op, lhs, rhs, a));
|
|
}
|
|
|
|
fn identity_fold_expr_field[ENV](&ENV env, &span sp,
|
|
@expr e, ident i, ann a) -> @expr {
|
|
ret @respan(sp, ast.expr_field(e, i, a));
|
|
}
|
|
|
|
fn identity_fold_expr_index[ENV](&ENV env, &span sp,
|
|
@expr e, @expr ix, ann a) -> @expr {
|
|
ret @respan(sp, ast.expr_index(e, ix, a));
|
|
}
|
|
|
|
fn identity_fold_expr_path[ENV](&ENV env, &span sp,
|
|
&path p, &option.t[def] d,
|
|
ann a) -> @expr {
|
|
ret @respan(sp, ast.expr_path(p, d, a));
|
|
}
|
|
|
|
|
|
// Decl identities.
|
|
|
|
fn identity_fold_decl_local[ENV](&ENV e, &span sp,
|
|
@ast.local local) -> @decl {
|
|
ret @respan(sp, ast.decl_local(local));
|
|
}
|
|
|
|
fn identity_fold_decl_item[ENV](&ENV e, &span sp, @item i) -> @decl {
|
|
ret @respan(sp, ast.decl_item(i));
|
|
}
|
|
|
|
|
|
// Pat identities.
|
|
|
|
fn identity_fold_pat_wild[ENV](&ENV e, &span sp, ann a) -> @pat {
|
|
ret @respan(sp, ast.pat_wild(a));
|
|
}
|
|
|
|
fn identity_fold_pat_bind[ENV](&ENV e, &span sp, ident i, def_id did, ann a)
|
|
-> @pat {
|
|
ret @respan(sp, ast.pat_bind(i, did, a));
|
|
}
|
|
|
|
fn identity_fold_pat_tag[ENV](&ENV e, &span sp, path p, vec[@pat] args,
|
|
option.t[ast.variant_def] d, ann a) -> @pat {
|
|
ret @respan(sp, ast.pat_tag(p, args, d, a));
|
|
}
|
|
|
|
|
|
// Stmt identities.
|
|
|
|
fn identity_fold_stmt_decl[ENV](&ENV env, &span sp, @decl d) -> @stmt {
|
|
ret @respan(sp, ast.stmt_decl(d));
|
|
}
|
|
|
|
fn identity_fold_stmt_ret[ENV](&ENV env, &span sp,
|
|
&option.t[@expr] rv) -> @stmt {
|
|
ret @respan(sp, ast.stmt_ret(rv));
|
|
}
|
|
|
|
fn identity_fold_stmt_log[ENV](&ENV e, &span sp, @expr x) -> @stmt {
|
|
ret @respan(sp, ast.stmt_log(x));
|
|
}
|
|
|
|
fn identity_fold_stmt_check_expr[ENV](&ENV e, &span sp, @expr x) -> @stmt {
|
|
ret @respan(sp, ast.stmt_check_expr(x));
|
|
}
|
|
|
|
fn identity_fold_stmt_expr[ENV](&ENV e, &span sp, @expr x) -> @stmt {
|
|
ret @respan(sp, ast.stmt_expr(x));
|
|
}
|
|
|
|
|
|
// Item identities.
|
|
|
|
fn identity_fold_item_const[ENV](&ENV e, &span sp, ident i,
|
|
@ty t, @expr ex,
|
|
def_id id, ann a) -> @item {
|
|
ret @respan(sp, ast.item_const(i, t, ex, id, a));
|
|
}
|
|
|
|
fn identity_fold_item_fn[ENV](&ENV e, &span sp, ident i,
|
|
&ast._fn f, vec[ast.ty_param] ty_params,
|
|
def_id id, ann a) -> @item {
|
|
ret @respan(sp, ast.item_fn(i, f, ty_params, id, a));
|
|
}
|
|
|
|
fn identity_fold_item_mod[ENV](&ENV e, &span sp, ident i,
|
|
&ast._mod m, def_id id) -> @item {
|
|
ret @respan(sp, ast.item_mod(i, m, id));
|
|
}
|
|
|
|
fn identity_fold_item_ty[ENV](&ENV e, &span sp, ident i,
|
|
@ty t, vec[ast.ty_param] ty_params,
|
|
def_id id, ann a) -> @item {
|
|
ret @respan(sp, ast.item_ty(i, t, ty_params, id, a));
|
|
}
|
|
|
|
fn identity_fold_item_tag[ENV](&ENV e, &span sp, ident i,
|
|
vec[ast.variant] variants,
|
|
vec[ast.ty_param] ty_params,
|
|
def_id id) -> @item {
|
|
ret @respan(sp, ast.item_tag(i, variants, ty_params, id));
|
|
}
|
|
|
|
fn identity_fold_item_obj[ENV](&ENV e, &span sp, ident i,
|
|
&ast._obj ob, vec[ast.ty_param] ty_params,
|
|
def_id id, ann a) -> @item {
|
|
ret @respan(sp, ast.item_obj(i, ob, ty_params, id, a));
|
|
}
|
|
|
|
// View Item folds.
|
|
|
|
fn identity_fold_view_item_use[ENV](&ENV e, &span sp, ident i,
|
|
vec[@meta_item] meta_items,
|
|
def_id id) -> @view_item {
|
|
ret @respan(sp, ast.view_item_use(i, meta_items, id));
|
|
}
|
|
|
|
fn identity_fold_view_item_import[ENV](&ENV e, &span sp, ident i,
|
|
vec[ident] is, def_id id,
|
|
option.t[def] target_def)
|
|
-> @view_item {
|
|
ret @respan(sp, ast.view_item_import(i, is, id, target_def));
|
|
}
|
|
|
|
// Additional identities.
|
|
|
|
fn identity_fold_block[ENV](&ENV e, &span sp, &ast.block_ blk) -> block {
|
|
ret respan(sp, blk);
|
|
}
|
|
|
|
fn identity_fold_fn[ENV](&ENV e,
|
|
ast.effect effect,
|
|
bool is_iter,
|
|
vec[arg] inputs,
|
|
@ast.ty output,
|
|
&block body) -> ast._fn {
|
|
ret rec(effect=effect, is_iter=is_iter, inputs=inputs,
|
|
output=output, body=body);
|
|
}
|
|
|
|
fn identity_fold_mod[ENV](&ENV e, &ast._mod m) -> ast._mod {
|
|
ret m;
|
|
}
|
|
|
|
fn identity_fold_crate[ENV](&ENV e, &span sp, &ast._mod m) -> @ast.crate {
|
|
ret @respan(sp, rec(module=m));
|
|
}
|
|
|
|
fn identity_fold_obj[ENV](&ENV e,
|
|
vec[ast.obj_field] fields,
|
|
vec[@ast.method] methods) -> ast._obj {
|
|
ret rec(fields=fields, methods=methods);
|
|
}
|
|
|
|
|
|
// Env update identities.
|
|
|
|
fn identity_update_env_for_crate[ENV](&ENV e, @ast.crate c) -> ENV {
|
|
ret e;
|
|
}
|
|
|
|
fn identity_update_env_for_item[ENV](&ENV e, @item i) -> ENV {
|
|
ret e;
|
|
}
|
|
|
|
fn identity_update_env_for_view_item[ENV](&ENV e, @view_item i) -> ENV {
|
|
ret e;
|
|
}
|
|
|
|
fn identity_update_env_for_block[ENV](&ENV e, &block b) -> ENV {
|
|
ret e;
|
|
}
|
|
|
|
fn identity_update_env_for_stmt[ENV](&ENV e, @stmt s) -> ENV {
|
|
ret e;
|
|
}
|
|
|
|
fn identity_update_env_for_decl[ENV](&ENV e, @decl d) -> ENV {
|
|
ret e;
|
|
}
|
|
|
|
fn identity_update_env_for_arm[ENV](&ENV e, &arm a) -> ENV {
|
|
ret e;
|
|
}
|
|
|
|
fn identity_update_env_for_pat[ENV](&ENV e, @pat p) -> ENV {
|
|
ret e;
|
|
}
|
|
|
|
fn identity_update_env_for_expr[ENV](&ENV e, @expr x) -> ENV {
|
|
ret e;
|
|
}
|
|
|
|
fn identity_update_env_for_ty[ENV](&ENV e, @ty t) -> ENV {
|
|
ret e;
|
|
}
|
|
|
|
|
|
// Always-true traversal control fn.
|
|
|
|
fn always_keep_going[ENV](&ENV e) -> bool {
|
|
ret true;
|
|
}
|
|
|
|
|
|
fn new_identity_fold[ENV]() -> ast_fold[ENV] {
|
|
ret @rec
|
|
(
|
|
fold_path = bind identity_fold_path[ENV](_,_,_),
|
|
|
|
fold_ty_nil = bind identity_fold_ty_nil[ENV](_,_),
|
|
fold_ty_bool = bind identity_fold_ty_bool[ENV](_,_),
|
|
fold_ty_int = bind identity_fold_ty_int[ENV](_,_),
|
|
fold_ty_uint = bind identity_fold_ty_uint[ENV](_,_),
|
|
fold_ty_machine = bind identity_fold_ty_machine[ENV](_,_,_),
|
|
fold_ty_char = bind identity_fold_ty_char[ENV](_,_),
|
|
fold_ty_str = bind identity_fold_ty_str[ENV](_,_),
|
|
fold_ty_box = bind identity_fold_ty_box[ENV](_,_,_),
|
|
fold_ty_vec = bind identity_fold_ty_vec[ENV](_,_,_),
|
|
fold_ty_tup = bind identity_fold_ty_tup[ENV](_,_,_),
|
|
fold_ty_rec = bind identity_fold_ty_rec[ENV](_,_,_),
|
|
fold_ty_obj = bind identity_fold_ty_obj[ENV](_,_,_),
|
|
fold_ty_fn = bind identity_fold_ty_fn[ENV](_,_,_,_),
|
|
fold_ty_path = bind identity_fold_ty_path[ENV](_,_,_,_),
|
|
fold_ty_mutable = bind identity_fold_ty_mutable[ENV](_,_,_),
|
|
|
|
fold_expr_vec = bind identity_fold_expr_vec[ENV](_,_,_,_),
|
|
fold_expr_tup = bind identity_fold_expr_tup[ENV](_,_,_,_),
|
|
fold_expr_rec = bind identity_fold_expr_rec[ENV](_,_,_,_),
|
|
fold_expr_call = bind identity_fold_expr_call[ENV](_,_,_,_,_),
|
|
fold_expr_bind = bind identity_fold_expr_bind[ENV](_,_,_,_,_),
|
|
fold_expr_binary = bind identity_fold_expr_binary[ENV](_,_,_,_,_,_),
|
|
fold_expr_unary = bind identity_fold_expr_unary[ENV](_,_,_,_,_),
|
|
fold_expr_lit = bind identity_fold_expr_lit[ENV](_,_,_,_),
|
|
fold_expr_cast = bind identity_fold_expr_cast[ENV](_,_,_,_,_),
|
|
fold_expr_if = bind identity_fold_expr_if[ENV](_,_,_,_,_,_,_),
|
|
fold_expr_for = bind identity_fold_expr_for[ENV](_,_,_,_,_,_),
|
|
fold_expr_while = bind identity_fold_expr_while[ENV](_,_,_,_,_),
|
|
fold_expr_do_while
|
|
= bind identity_fold_expr_do_while[ENV](_,_,_,_,_),
|
|
fold_expr_alt = bind identity_fold_expr_alt[ENV](_,_,_,_,_),
|
|
fold_expr_block = bind identity_fold_expr_block[ENV](_,_,_,_),
|
|
fold_expr_assign = bind identity_fold_expr_assign[ENV](_,_,_,_,_),
|
|
fold_expr_assign_op
|
|
= bind identity_fold_expr_assign_op[ENV](_,_,_,_,_,_),
|
|
fold_expr_field = bind identity_fold_expr_field[ENV](_,_,_,_,_),
|
|
fold_expr_index = bind identity_fold_expr_index[ENV](_,_,_,_,_),
|
|
fold_expr_path = bind identity_fold_expr_path[ENV](_,_,_,_,_),
|
|
|
|
fold_decl_local = bind identity_fold_decl_local[ENV](_,_,_),
|
|
fold_decl_item = bind identity_fold_decl_item[ENV](_,_,_),
|
|
|
|
fold_pat_wild = bind identity_fold_pat_wild[ENV](_,_,_),
|
|
fold_pat_bind = bind identity_fold_pat_bind[ENV](_,_,_,_,_),
|
|
fold_pat_tag = bind identity_fold_pat_tag[ENV](_,_,_,_,_,_),
|
|
|
|
fold_stmt_decl = bind identity_fold_stmt_decl[ENV](_,_,_),
|
|
fold_stmt_ret = bind identity_fold_stmt_ret[ENV](_,_,_),
|
|
fold_stmt_log = bind identity_fold_stmt_log[ENV](_,_,_),
|
|
fold_stmt_check_expr
|
|
= bind identity_fold_stmt_check_expr[ENV](_,_,_),
|
|
fold_stmt_expr = bind identity_fold_stmt_expr[ENV](_,_,_),
|
|
|
|
fold_item_const= bind identity_fold_item_const[ENV](_,_,_,_,_,_,_),
|
|
fold_item_fn = bind identity_fold_item_fn[ENV](_,_,_,_,_,_,_),
|
|
fold_item_mod = bind identity_fold_item_mod[ENV](_,_,_,_,_),
|
|
fold_item_ty = bind identity_fold_item_ty[ENV](_,_,_,_,_,_,_),
|
|
fold_item_tag = bind identity_fold_item_tag[ENV](_,_,_,_,_,_),
|
|
fold_item_obj = bind identity_fold_item_obj[ENV](_,_,_,_,_,_,_),
|
|
|
|
fold_view_item_use =
|
|
bind identity_fold_view_item_use[ENV](_,_,_,_,_),
|
|
fold_view_item_import =
|
|
bind identity_fold_view_item_import[ENV](_,_,_,_,_,_),
|
|
|
|
fold_block = bind identity_fold_block[ENV](_,_,_),
|
|
fold_fn = bind identity_fold_fn[ENV](_,_,_,_,_,_),
|
|
fold_mod = bind identity_fold_mod[ENV](_,_),
|
|
fold_crate = bind identity_fold_crate[ENV](_,_,_),
|
|
fold_obj = bind identity_fold_obj[ENV](_,_,_),
|
|
|
|
update_env_for_crate = bind identity_update_env_for_crate[ENV](_,_),
|
|
update_env_for_item = bind identity_update_env_for_item[ENV](_,_),
|
|
update_env_for_view_item =
|
|
bind identity_update_env_for_view_item[ENV](_,_),
|
|
update_env_for_block = bind identity_update_env_for_block[ENV](_,_),
|
|
update_env_for_stmt = bind identity_update_env_for_stmt[ENV](_,_),
|
|
update_env_for_decl = bind identity_update_env_for_decl[ENV](_,_),
|
|
update_env_for_pat = bind identity_update_env_for_pat[ENV](_,_),
|
|
update_env_for_arm = bind identity_update_env_for_arm[ENV](_,_),
|
|
update_env_for_expr = bind identity_update_env_for_expr[ENV](_,_),
|
|
update_env_for_ty = bind identity_update_env_for_ty[ENV](_,_),
|
|
|
|
keep_going = bind always_keep_going[ENV](_)
|
|
);
|
|
}
|
|
|
|
|
|
//
|
|
// Local Variables:
|
|
// mode: rust
|
|
// fill-column: 78;
|
|
// indent-tabs-mode: nil
|
|
// c-basic-offset: 4
|
|
// buffer-file-coding-system: utf-8-unix
|
|
// compile-command: "make -k -C ../.. 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
|
|
// End:
|
|
//
|