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|
export fold;
export default_seq_fold;
export default_seq_fold_doc;
export default_seq_fold_crate;
export default_seq_fold_item;
export default_seq_fold_mod;
export default_seq_fold_nmod;
export default_seq_fold_fn;
export default_seq_fold_const;
export default_seq_fold_enum;
export default_seq_fold_trait;
export default_seq_fold_impl;
export default_seq_fold_type;
export default_par_fold;
export default_par_fold_mod;
export default_par_fold_nmod;
export default_any_fold;
export default_any_fold_mod;
export default_any_fold_nmod;
enum fold<T> = t<T>;
type fold_doc<T> = fn~(fold: fold<T>, doc: doc::doc) -> doc::doc;
type fold_crate<T> = fn~(fold: fold<T>, doc: doc::cratedoc) -> doc::cratedoc;
type fold_item<T> = fn~(fold: fold<T>, doc: doc::itemdoc) -> doc::itemdoc;
type fold_mod<T> = fn~(fold: fold<T>, doc: doc::moddoc) -> doc::moddoc;
type fold_nmod<T> = fn~(fold: fold<T>, doc: doc::nmoddoc) -> doc::nmoddoc;
type fold_fn<T> = fn~(fold: fold<T>, doc: doc::fndoc) -> doc::fndoc;
type fold_const<T> = fn~(fold: fold<T>, doc: doc::constdoc) -> doc::constdoc;
type fold_enum<T> = fn~(fold: fold<T>, doc: doc::enumdoc) -> doc::enumdoc;
type fold_trait<T> = fn~(fold: fold<T>, doc: doc::traitdoc) -> doc::traitdoc;
type fold_impl<T> = fn~(fold: fold<T>, doc: doc::impldoc) -> doc::impldoc;
type fold_type<T> = fn~(fold: fold<T>, doc: doc::tydoc) -> doc::tydoc;
type t<T> = {
ctxt: T,
fold_doc: fold_doc<T>,
fold_crate: fold_crate<T>,
fold_item: fold_item<T>,
fold_mod: fold_mod<T>,
fold_nmod: fold_nmod<T>,
fold_fn: fold_fn<T>,
fold_const: fold_const<T>,
fold_enum: fold_enum<T>,
fold_trait: fold_trait<T>,
fold_impl: fold_impl<T>,
fold_type: fold_type<T>
};
// This exists because fn types don't infer correctly as record
// initializers, but they do as function arguments
fn mk_fold<T:copy>(
ctxt: T,
+fold_doc: fold_doc<T>,
+fold_crate: fold_crate<T>,
+fold_item: fold_item<T>,
+fold_mod: fold_mod<T>,
+fold_nmod: fold_nmod<T>,
+fold_fn: fold_fn<T>,
+fold_const: fold_const<T>,
+fold_enum: fold_enum<T>,
+fold_trait: fold_trait<T>,
+fold_impl: fold_impl<T>,
+fold_type: fold_type<T>
) -> fold<T> {
fold({
ctxt: ctxt,
fold_doc: fold_doc,
fold_crate: fold_crate,
fold_item: fold_item,
fold_mod: fold_mod,
fold_nmod: fold_nmod,
fold_fn: fold_fn,
fold_const: fold_const,
fold_enum: fold_enum,
fold_trait: fold_trait,
fold_impl: fold_impl,
fold_type: fold_type
})
}
fn default_any_fold<T:send copy>(ctxt: T) -> fold<T> {
mk_fold(
ctxt,
|f, d| default_seq_fold_doc(f, d),
|f, d| default_seq_fold_crate(f, d),
|f, d| default_seq_fold_item(f, d),
|f, d| default_any_fold_mod(f, d),
|f, d| default_any_fold_nmod(f, d),
|f, d| default_seq_fold_fn(f, d),
|f, d| default_seq_fold_const(f, d),
|f, d| default_seq_fold_enum(f, d),
|f, d| default_seq_fold_trait(f, d),
|f, d| default_seq_fold_impl(f, d),
|f, d| default_seq_fold_type(f, d)
)
}
fn default_seq_fold<T:copy>(ctxt: T) -> fold<T> {
mk_fold(
ctxt,
|f, d| default_seq_fold_doc(f, d),
|f, d| default_seq_fold_crate(f, d),
|f, d| default_seq_fold_item(f, d),
|f, d| default_seq_fold_mod(f, d),
|f, d| default_seq_fold_nmod(f, d),
|f, d| default_seq_fold_fn(f, d),
|f, d| default_seq_fold_const(f, d),
|f, d| default_seq_fold_enum(f, d),
|f, d| default_seq_fold_trait(f, d),
|f, d| default_seq_fold_impl(f, d),
|f, d| default_seq_fold_type(f, d)
)
}
fn default_par_fold<T:send copy>(ctxt: T) -> fold<T> {
mk_fold(
ctxt,
|f, d| default_seq_fold_doc(f, d),
|f, d| default_seq_fold_crate(f, d),
|f, d| default_seq_fold_item(f, d),
|f, d| default_par_fold_mod(f, d),
|f, d| default_par_fold_nmod(f, d),
|f, d| default_seq_fold_fn(f, d),
|f, d| default_seq_fold_const(f, d),
|f, d| default_seq_fold_enum(f, d),
|f, d| default_seq_fold_trait(f, d),
|f, d| default_seq_fold_impl(f, d),
|f, d| default_seq_fold_type(f, d)
)
}
fn default_seq_fold_doc<T>(fold: fold<T>, doc: doc::doc) -> doc::doc {
doc::doc_({
pages: do vec::map(doc.pages) |page| {
match page {
doc::cratepage(doc) => {
doc::cratepage(fold.fold_crate(fold, doc))
}
doc::itempage(doc) => {
doc::itempage(fold_itemtag(fold, doc))
}
}
},
.. *doc
})
}
fn default_seq_fold_crate<T>(
fold: fold<T>,
doc: doc::cratedoc
) -> doc::cratedoc {
{
topmod: fold.fold_mod(fold, doc.topmod)
}
}
fn default_seq_fold_item<T>(
_fold: fold<T>,
doc: doc::itemdoc
) -> doc::itemdoc {
doc
}
fn default_any_fold_mod<T:send copy>(
fold: fold<T>,
doc: doc::moddoc
) -> doc::moddoc {
doc::moddoc_({
item: fold.fold_item(fold, doc.item),
items: par::map(doc.items, |itemtag, copy fold| {
fold_itemtag(fold, itemtag)
}),
.. *doc
})
}
fn default_seq_fold_mod<T>(
fold: fold<T>,
doc: doc::moddoc
) -> doc::moddoc {
doc::moddoc_({
item: fold.fold_item(fold, doc.item),
items: vec::map(doc.items, |itemtag| {
fold_itemtag(fold, itemtag)
}),
.. *doc
})
}
fn default_par_fold_mod<T:send copy>(
fold: fold<T>,
doc: doc::moddoc
) -> doc::moddoc {
doc::moddoc_({
item: fold.fold_item(fold, doc.item),
items: par::map(doc.items, |itemtag, copy fold| {
fold_itemtag(fold, itemtag)
}),
.. *doc
})
}
fn default_any_fold_nmod<T:send copy>(
fold: fold<T>,
doc: doc::nmoddoc
) -> doc::nmoddoc {
{
item: fold.fold_item(fold, doc.item),
fns: par::map(doc.fns, |fndoc, copy fold| {
fold.fold_fn(fold, fndoc)
}),
.. doc
}
}
fn default_seq_fold_nmod<T>(
fold: fold<T>,
doc: doc::nmoddoc
) -> doc::nmoddoc {
{
item: fold.fold_item(fold, doc.item),
fns: vec::map(doc.fns, |fndoc| {
fold.fold_fn(fold, fndoc)
}),
.. doc
}
}
fn default_par_fold_nmod<T:send copy>(
fold: fold<T>,
doc: doc::nmoddoc
) -> doc::nmoddoc {
{
item: fold.fold_item(fold, doc.item),
fns: par::map(doc.fns, |fndoc, copy fold| {
fold.fold_fn(fold, fndoc)
}),
.. doc
}
}
fn fold_itemtag<T>(fold: fold<T>, doc: doc::itemtag) -> doc::itemtag {
match doc {
doc::modtag(moddoc) => {
doc::modtag(fold.fold_mod(fold, moddoc))
}
doc::nmodtag(nmoddoc) => {
doc::nmodtag(fold.fold_nmod(fold, nmoddoc))
}
doc::fntag(fndoc) => {
doc::fntag(fold.fold_fn(fold, fndoc))
}
doc::consttag(constdoc) => {
doc::consttag(fold.fold_const(fold, constdoc))
}
doc::enumtag(enumdoc) => {
doc::enumtag(fold.fold_enum(fold, enumdoc))
}
doc::traittag(traitdoc) => {
doc::traittag(fold.fold_trait(fold, traitdoc))
}
doc::impltag(impldoc) => {
doc::impltag(fold.fold_impl(fold, impldoc))
}
doc::tytag(tydoc) => {
doc::tytag(fold.fold_type(fold, tydoc))
}
}
}
fn default_seq_fold_fn<T>(
fold: fold<T>,
doc: doc::fndoc
) -> doc::fndoc {
{
item: fold.fold_item(fold, doc.item),
.. doc
}
}
fn default_seq_fold_const<T>(
fold: fold<T>,
doc: doc::constdoc
) -> doc::constdoc {
{
item: fold.fold_item(fold, doc.item),
.. doc
}
}
fn default_seq_fold_enum<T>(
fold: fold<T>,
doc: doc::enumdoc
) -> doc::enumdoc {
{
item: fold.fold_item(fold, doc.item),
.. doc
}
}
fn default_seq_fold_trait<T>(
fold: fold<T>,
doc: doc::traitdoc
) -> doc::traitdoc {
{
item: fold.fold_item(fold, doc.item),
.. doc
}
}
fn default_seq_fold_impl<T>(
fold: fold<T>,
doc: doc::impldoc
) -> doc::impldoc {
{
item: fold.fold_item(fold, doc.item),
.. doc
}
}
fn default_seq_fold_type<T>(
fold: fold<T>,
doc: doc::tydoc
) -> doc::tydoc {
{
item: fold.fold_item(fold, doc.item),
.. doc
}
}
#[test]
fn default_fold_should_produce_same_doc() {
let source = ~"mod a { fn b() { } mod c { fn d() { } } }";
let ast = parse::from_str(source);
let doc = extract::extract(ast, ~"");
let fld = default_seq_fold(());
let folded = fld.fold_doc(fld, doc);
assert doc == folded;
}
#[test]
fn default_fold_should_produce_same_consts() {
let source = ~"const a: int = 0;";
let ast = parse::from_str(source);
let doc = extract::extract(ast, ~"");
let fld = default_seq_fold(());
let folded = fld.fold_doc(fld, doc);
assert doc == folded;
}
#[test]
fn default_fold_should_produce_same_enums() {
let source = ~"enum a { b }";
let ast = parse::from_str(source);
let doc = extract::extract(ast, ~"");
let fld = default_seq_fold(());
let folded = fld.fold_doc(fld, doc);
assert doc == folded;
}
#[test]
fn default_parallel_fold_should_produce_same_doc() {
let source = ~"mod a { fn b() { } mod c { fn d() { } } }";
let ast = parse::from_str(source);
let doc = extract::extract(ast, ~"");
let fld = default_par_fold(());
let folded = fld.fold_doc(fld, doc);
assert doc == folded;
}
|
