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Auto merge of #112233 - notriddle:notriddle/search-unify, r=GuillaumeGomez
rustdoc-search: clean up type unification and "unboxing" This PR redesigns parameter matching, return matching, and generics matching to use a single function that compares two lists of types. It also makes the algorithms more consistent, so the "unboxing" behavior where `Vec<i32>` is considered a match for `i32` works inside generics, and not just at the top level.
This commit is contained in:
commit
314c39d2ea
@ -53,7 +53,7 @@ let ParsedQuery;
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* parent: (Object|null|undefined),
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* path: string,
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* ty: (Number|null|number),
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* type: (Array<?>|null)
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* type: FunctionSearchType?
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* }}
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*/
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let Row;
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@ -135,7 +135,7 @@ let RawFunctionType;
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/**
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* @typedef {{
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* inputs: Array<FunctionType>,
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* outputs: Array<FunctionType>,
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* output: Array<FunctionType>,
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* }}
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*/
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let FunctionSearchType;
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@ -1216,113 +1216,182 @@ function initSearch(rawSearchIndex) {
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}
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/**
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* This function checks if the object (`row`) generics match the given type (`elem`)
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* generics. If there are no generics on `row`, `defaultDistance` is returned.
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* This function checks generics in search query `queryElem` can all be found in the
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* search index (`fnType`),
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*
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* @param {Row} row - The object to check.
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* @param {QueryElement} elem - The element from the parsed query.
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* @param {FunctionType} fnType - The object to check.
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* @param {QueryElement} queryElem - The element from the parsed query.
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*
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* @return {boolean} - Returns true if a match, false otherwise.
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* @return {boolean} - Returns true if a match, false otherwise.
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*/
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function checkGenerics(row, elem) {
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if (row.generics.length === 0 || elem.generics.length === 0) {
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return false;
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}
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// This function is called if the names match, but we need to make
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// sure that all generics match as well.
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//
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function checkGenerics(fnType, queryElem) {
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return unifyFunctionTypes(fnType.generics, queryElem.generics);
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}
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/**
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* This function checks if a list of search query `queryElems` can all be found in the
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* search index (`fnTypes`).
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*
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* @param {Array<FunctionType>} fnTypes - The objects to check.
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* @param {Array<QueryElement>} queryElems - The elements from the parsed query.
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*
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* @return {boolean} - Returns true if a match, false otherwise.
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*/
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function unifyFunctionTypes(fnTypes, queryElems) {
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// This search engine implements order-agnostic unification. There
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// should be no missing duplicates (generics have "bag semantics"),
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// and the row is allowed to have extras.
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if (elem.generics.length > 0 && row.generics.length >= elem.generics.length) {
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const elems = new Map();
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const addEntryToElems = function addEntryToElems(entry) {
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if (entry.id === -1) {
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// Pure generic, needs to check into it.
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for (const inner_entry of entry.generics) {
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addEntryToElems(inner_entry);
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}
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return;
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}
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let currentEntryElems;
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if (elems.has(entry.id)) {
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currentEntryElems = elems.get(entry.id);
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} else {
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currentEntryElems = [];
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elems.set(entry.id, currentEntryElems);
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}
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currentEntryElems.push(entry);
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};
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for (const entry of row.generics) {
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addEntryToElems(entry);
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}
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// We need to find the type that matches the most to remove it in order
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// to move forward.
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const handleGeneric = generic => {
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if (!elems.has(generic.id)) {
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return false;
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}
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const matchElems = elems.get(generic.id);
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const matchIdx = matchElems.findIndex(tmp_elem => {
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if (generic.generics.length > 0 && !checkGenerics(tmp_elem, generic)) {
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return false;
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}
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return typePassesFilter(generic.typeFilter, tmp_elem.ty);
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});
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if (matchIdx === -1) {
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return false;
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}
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matchElems.splice(matchIdx, 1);
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if (matchElems.length === 0) {
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elems.delete(generic.id);
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}
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return true;
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};
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// To do the right thing with type filters, we first process generics
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// that have them, removing matching ones from the "bag," then do the
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// ones with no type filter, which can match any entry regardless of its
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// own type.
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for (const generic of elem.generics) {
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if (generic.typeFilter === TY_PRIMITIVE &&
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generic.id === typeNameIdOfArrayOrSlice) {
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const genericArray = {
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id: typeNameIdOfArray,
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typeFilter: TY_PRIMITIVE,
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generics: generic.generics,
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};
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const genericSlice = {
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id: typeNameIdOfSlice,
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typeFilter: TY_PRIMITIVE,
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generics: generic.generics,
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};
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if (!handleGeneric(genericArray) && !handleGeneric(genericSlice)) {
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return false;
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}
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} else if (generic.typeFilter !== -1 && !handleGeneric(generic)) {
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return false;
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}
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}
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for (const generic of elem.generics) {
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if (generic.typeFilter === -1 && !handleGeneric(generic)) {
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return false;
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}
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}
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if (queryElems.length === 0) {
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return true;
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}
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return false;
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if (!fnTypes || fnTypes.length === 0) {
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return false;
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}
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/**
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* @type Map<integer, QueryElement[]>
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*/
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const queryElemSet = new Map();
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const addQueryElemToQueryElemSet = function addQueryElemToQueryElemSet(queryElem) {
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let currentQueryElemList;
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if (queryElemSet.has(queryElem.id)) {
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currentQueryElemList = queryElemSet.get(queryElem.id);
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} else {
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currentQueryElemList = [];
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queryElemSet.set(queryElem.id, currentQueryElemList);
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}
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currentQueryElemList.push(queryElem);
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};
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for (const queryElem of queryElems) {
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addQueryElemToQueryElemSet(queryElem);
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}
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/**
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* @type Map<integer, FunctionType[]>
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*/
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const fnTypeSet = new Map();
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const addFnTypeToFnTypeSet = function addFnTypeToFnTypeSet(fnType) {
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// Pure generic, or an item that's not matched by any query elems.
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// Try [unboxing] it.
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//
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// [unboxing]:
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// http://ndmitchell.com/downloads/slides-hoogle_fast_type_searching-09_aug_2008.pdf
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const queryContainsArrayOrSliceElem = queryElemSet.has(typeNameIdOfArrayOrSlice);
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if (fnType.id === -1 || !(
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queryElemSet.has(fnType.id) ||
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(fnType.id === typeNameIdOfSlice && queryContainsArrayOrSliceElem) ||
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(fnType.id === typeNameIdOfArray && queryContainsArrayOrSliceElem)
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)) {
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for (const innerFnType of fnType.generics) {
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addFnTypeToFnTypeSet(innerFnType);
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}
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return;
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}
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let currentQueryElemList = queryElemSet.get(fnType.id) || [];
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let matchIdx = currentQueryElemList.findIndex(queryElem => {
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return typePassesFilter(queryElem.typeFilter, fnType.ty) &&
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checkGenerics(fnType, queryElem);
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});
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if (matchIdx === -1 &&
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(fnType.id === typeNameIdOfSlice || fnType.id === typeNameIdOfArray) &&
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queryContainsArrayOrSliceElem
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) {
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currentQueryElemList = queryElemSet.get(typeNameIdOfArrayOrSlice) || [];
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matchIdx = currentQueryElemList.findIndex(queryElem => {
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return typePassesFilter(queryElem.typeFilter, fnType.ty) &&
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checkGenerics(fnType, queryElem);
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});
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}
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// None of the query elems match the function type.
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// Try [unboxing] it.
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if (matchIdx === -1) {
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for (const innerFnType of fnType.generics) {
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addFnTypeToFnTypeSet(innerFnType);
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}
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return;
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}
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let currentFnTypeList;
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if (fnTypeSet.has(fnType.id)) {
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currentFnTypeList = fnTypeSet.get(fnType.id);
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} else {
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currentFnTypeList = [];
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fnTypeSet.set(fnType.id, currentFnTypeList);
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}
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currentFnTypeList.push(fnType);
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};
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for (const fnType of fnTypes) {
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addFnTypeToFnTypeSet(fnType);
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}
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const doHandleQueryElemList = (currentFnTypeList, queryElemList) => {
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if (queryElemList.length === 0) {
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return true;
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}
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// Multiple items in one list might match multiple items in another.
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// Since an item with fewer generics can match an item with more, we
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// need to check all combinations for a potential match.
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const queryElem = queryElemList.pop();
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const l = currentFnTypeList.length;
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for (let i = 0; i < l; i += 1) {
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const fnType = currentFnTypeList[i];
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if (!typePassesFilter(queryElem.typeFilter, fnType.ty)) {
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continue;
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}
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if (queryElem.generics.length === 0 || checkGenerics(fnType, queryElem)) {
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currentFnTypeList.splice(i, 1);
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const result = doHandleQueryElemList(currentFnTypeList, queryElemList);
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if (result) {
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return true;
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}
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currentFnTypeList.splice(i, 0, fnType);
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}
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}
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return false;
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};
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const handleQueryElemList = (id, queryElemList) => {
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if (!fnTypeSet.has(id)) {
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if (id === typeNameIdOfArrayOrSlice) {
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return handleQueryElemList(typeNameIdOfSlice, queryElemList) ||
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handleQueryElemList(typeNameIdOfArray, queryElemList);
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}
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return false;
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}
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const currentFnTypeList = fnTypeSet.get(id);
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if (currentFnTypeList.length < queryElemList.length) {
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// It's not possible for all the query elems to find a match.
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return false;
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}
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const result = doHandleQueryElemList(currentFnTypeList, queryElemList);
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if (result) {
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// Found a solution.
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// Any items that weren't used for it can be unboxed, and might form
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// part of the solution for another item.
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for (const innerFnType of currentFnTypeList) {
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addFnTypeToFnTypeSet(innerFnType);
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}
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fnTypeSet.delete(id);
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}
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return result;
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};
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let queryElemSetSize = -1;
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while (queryElemSetSize !== queryElemSet.size) {
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queryElemSetSize = queryElemSet.size;
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for (const [id, queryElemList] of queryElemSet) {
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if (handleQueryElemList(id, queryElemList)) {
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queryElemSet.delete(id);
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}
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}
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}
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return queryElemSetSize === 0;
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}
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/**
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* This function checks if the object (`row`) matches the given type (`elem`) and its
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* generics (if any).
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*
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* @param {Row} row
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* @param {Array<FunctionType>} list
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* @param {QueryElement} elem - The element from the parsed query.
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*
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* @return {boolean} - Returns true if found, false otherwise.
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*/
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function checkIfInGenerics(row, elem) {
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for (const entry of row.generics) {
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function checkIfInList(list, elem) {
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for (const entry of list) {
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if (checkType(entry, elem)) {
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return true;
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}
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@ -1342,7 +1411,7 @@ function initSearch(rawSearchIndex) {
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function checkType(row, elem) {
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if (row.id === -1) {
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// This is a pure "generic" search, no need to run other checks.
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return row.generics.length > 0 ? checkIfInGenerics(row, elem) : false;
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return row.generics.length > 0 ? checkIfInList(row.generics, elem) : false;
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}
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const matchesExact = row.id === elem.id;
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@ -1360,59 +1429,7 @@ function initSearch(rawSearchIndex) {
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// If the current item does not match, try [unboxing] the generic.
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// [unboxing]:
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// https://ndmitchell.com/downloads/slides-hoogle_fast_type_searching-09_aug_2008.pdf
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return checkIfInGenerics(row, elem);
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}
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/**
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* This function checks if the object (`row`) has an argument with the given type (`elem`).
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*
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* @param {Row} row
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* @param {QueryElement} elem - The element from the parsed query.
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* @param {Array<integer>} skipPositions - Do not return one of these positions.
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*
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* @return {integer} - Returns the position of the match, or -1 if none.
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*/
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function findArg(row, elem, skipPositions) {
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if (row && row.type && row.type.inputs && row.type.inputs.length > 0) {
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let i = 0;
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for (const input of row.type.inputs) {
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if (skipPositions.indexOf(i) !== -1) {
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i += 1;
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continue;
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}
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if (checkType(input, elem)) {
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return i;
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}
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i += 1;
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}
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}
|
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return -1;
|
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}
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/**
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* This function checks if the object (`row`) returns the given type (`elem`).
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*
|
||||
* @param {Row} row
|
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* @param {QueryElement} elem - The element from the parsed query.
|
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* @param {Array<integer>} skipPositions - Do not return one of these positions.
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*
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* @return {integer} - Returns the position of the matching item, or -1 if none.
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*/
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function checkReturned(row, elem, skipPositions) {
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if (row && row.type && row.type.output.length > 0) {
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let i = 0;
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for (const ret_ty of row.type.output) {
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if (skipPositions.indexOf(i) !== -1) {
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i += 1;
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continue;
|
||||
}
|
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if (checkType(ret_ty, elem)) {
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return i;
|
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}
|
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i += 1;
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}
|
||||
}
|
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return -1;
|
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return checkIfInList(row.generics, elem);
|
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}
|
||||
|
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function checkPath(contains, ty, maxEditDistance) {
|
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@ -1613,14 +1630,14 @@ function initSearch(rawSearchIndex) {
|
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const fullId = row.id;
|
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const searchWord = searchWords[pos];
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const in_args = findArg(row, elem, []);
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if (in_args !== -1) {
|
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const in_args = row.type && row.type.inputs && checkIfInList(row.type.inputs, elem);
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if (in_args) {
|
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// path_dist is 0 because no parent path information is currently stored
|
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// in the search index
|
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addIntoResults(results_in_args, fullId, pos, -1, 0, 0, maxEditDistance);
|
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}
|
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const returned = checkReturned(row, elem, []);
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if (returned !== -1) {
|
||||
const returned = row.type && row.type.output && checkIfInList(row.type.output, elem);
|
||||
if (returned) {
|
||||
addIntoResults(results_returned, fullId, pos, -1, 0, 0, maxEditDistance);
|
||||
}
|
||||
|
||||
@ -1676,32 +1693,15 @@ function initSearch(rawSearchIndex) {
|
||||
* @param {Object} results
|
||||
*/
|
||||
function handleArgs(row, pos, results) {
|
||||
if (!row || (filterCrates !== null && row.crate !== filterCrates)) {
|
||||
if (!row || (filterCrates !== null && row.crate !== filterCrates) || !row.type) {
|
||||
return;
|
||||
}
|
||||
|
||||
// If the result is too "bad", we return false and it ends this search.
|
||||
function checkArgs(elems, callback) {
|
||||
const skipPositions = [];
|
||||
for (const elem of elems) {
|
||||
// There is more than one parameter to the query so all checks should be "exact"
|
||||
const position = callback(
|
||||
row,
|
||||
elem,
|
||||
skipPositions
|
||||
);
|
||||
if (position !== -1) {
|
||||
skipPositions.push(position);
|
||||
} else {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
if (!checkArgs(parsedQuery.elems, findArg)) {
|
||||
if (!unifyFunctionTypes(row.type.inputs, parsedQuery.elems)) {
|
||||
return;
|
||||
}
|
||||
if (!checkArgs(parsedQuery.returned, checkReturned)) {
|
||||
if (!unifyFunctionTypes(row.type.output, parsedQuery.returned)) {
|
||||
return;
|
||||
}
|
||||
|
||||
@ -1788,12 +1788,9 @@ function initSearch(rawSearchIndex) {
|
||||
elem = parsedQuery.returned[0];
|
||||
for (i = 0, nSearchWords = searchWords.length; i < nSearchWords; ++i) {
|
||||
row = searchIndex[i];
|
||||
in_returned = checkReturned(
|
||||
row,
|
||||
elem,
|
||||
[]
|
||||
);
|
||||
if (in_returned !== -1) {
|
||||
in_returned = row.type &&
|
||||
unifyFunctionTypes(row.type.output, parsedQuery.returned);
|
||||
if (in_returned) {
|
||||
addIntoResults(
|
||||
results_others,
|
||||
row.id,
|
||||
|
13
tests/rustdoc-js-std/bufread-fill-buf.js
Normal file
13
tests/rustdoc-js-std/bufread-fill-buf.js
Normal file
@ -0,0 +1,13 @@
|
||||
// ignore-order
|
||||
|
||||
const EXPECTED = [
|
||||
{
|
||||
'query': 'bufread -> result<u8>',
|
||||
'others': [
|
||||
{ 'path': 'std::io::Split', 'name': 'next' },
|
||||
{ 'path': 'std::boxed::Box', 'name': 'fill_buf' },
|
||||
{ 'path': 'std::io::Chain', 'name': 'fill_buf' },
|
||||
{ 'path': 'std::io::Take', 'name': 'fill_buf' },
|
||||
],
|
||||
},
|
||||
];
|
91
tests/rustdoc-js/generics-match-ambiguity.js
Normal file
91
tests/rustdoc-js/generics-match-ambiguity.js
Normal file
@ -0,0 +1,91 @@
|
||||
// ignore-order
|
||||
// exact-check
|
||||
|
||||
// Make sure that results are order-agnostic, even when there's search items that only differ
|
||||
// by generics.
|
||||
|
||||
const EXPECTED = [
|
||||
{
|
||||
'query': 'Wrap',
|
||||
'in_args': [
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'bar' },
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'foo' },
|
||||
],
|
||||
},
|
||||
{
|
||||
'query': 'Wrap<i32>',
|
||||
'in_args': [
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'bar' },
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'foo' },
|
||||
],
|
||||
},
|
||||
{
|
||||
'query': 'Wrap<i32>, Wrap<i32, u32>',
|
||||
'others': [
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'bar' },
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'foo' },
|
||||
],
|
||||
},
|
||||
{
|
||||
'query': 'Wrap<i32, u32>, Wrap<i32>',
|
||||
'others': [
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'bar' },
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'foo' },
|
||||
],
|
||||
},
|
||||
{
|
||||
'query': 'W3<i32>, W3<i32, u32>',
|
||||
'others': [
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baaa' },
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baab' },
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baac' },
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baad' },
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baae' },
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baaf' },
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baag' },
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baah' },
|
||||
],
|
||||
},
|
||||
{
|
||||
'query': 'W3<i32, u32>, W3<i32>',
|
||||
'others': [
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baaa' },
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baab' },
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baac' },
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baad' },
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baae' },
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baaf' },
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baag' },
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baah' },
|
||||
],
|
||||
},
|
||||
{
|
||||
'query': 'W2<i32>, W2<i32, u32>',
|
||||
'others': [
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baag' },
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baah' },
|
||||
],
|
||||
},
|
||||
{
|
||||
'query': 'W2<i32, u32>, W2<i32>',
|
||||
'others': [
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baag' },
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baah' },
|
||||
],
|
||||
},
|
||||
{
|
||||
'query': 'W2<i32>, W3<i32, u32>',
|
||||
'others': [
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baac' },
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baaf' },
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baag' },
|
||||
],
|
||||
},
|
||||
{
|
||||
'query': 'W2<i32>, W2<i32>',
|
||||
'others': [
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baag' },
|
||||
{ 'path': 'generics_match_ambiguity', 'name': 'baah' },
|
||||
],
|
||||
},
|
||||
];
|
17
tests/rustdoc-js/generics-match-ambiguity.rs
Normal file
17
tests/rustdoc-js/generics-match-ambiguity.rs
Normal file
@ -0,0 +1,17 @@
|
||||
pub struct Wrap<T, U = ()>(pub T, pub U);
|
||||
|
||||
pub fn foo(a: Wrap<i32>, b: Wrap<i32, u32>) {}
|
||||
pub fn bar(a: Wrap<i32, u32>, b: Wrap<i32>) {}
|
||||
|
||||
pub struct W2<T>(pub T);
|
||||
pub struct W3<T, U = ()>(pub T, pub U);
|
||||
|
||||
pub fn baaa(a: W3<i32>, b: W3<i32, u32>) {}
|
||||
pub fn baab(a: W3<i32, u32>, b: W3<i32>) {}
|
||||
pub fn baac(a: W2<W3<i32>>, b: W3<i32, u32>) {}
|
||||
pub fn baad(a: W2<W3<i32, u32>>, b: W3<i32>) {}
|
||||
pub fn baae(a: W3<i32>, b: W2<W3<i32, u32>>) {}
|
||||
pub fn baaf(a: W3<i32, u32>, b: W2<W3<i32>>) {}
|
||||
pub fn baag(a: W2<W3<i32>>, b: W2<W3<i32, u32>>) {}
|
||||
pub fn baah(a: W2<W3<i32, u32>>, b: W2<W3<i32>>) {}
|
||||
//
|
68
tests/rustdoc-js/nested-unboxed.js
Normal file
68
tests/rustdoc-js/nested-unboxed.js
Normal file
@ -0,0 +1,68 @@
|
||||
// exact-check
|
||||
|
||||
const EXPECTED = [
|
||||
{
|
||||
'query': '-> Result<Object, bool>',
|
||||
'others': [
|
||||
{ 'path': 'nested_unboxed', 'name': 'something' },
|
||||
],
|
||||
},
|
||||
{
|
||||
'query': '-> Result<Object<i32, u32>, bool>',
|
||||
'others': [
|
||||
{ 'path': 'nested_unboxed', 'name': 'something' },
|
||||
],
|
||||
},
|
||||
{
|
||||
'query': '-> Object, bool',
|
||||
'others': [
|
||||
{ 'path': 'nested_unboxed', 'name': 'something' },
|
||||
],
|
||||
},
|
||||
{
|
||||
'query': '-> Object<i32, u32>, bool',
|
||||
'others': [
|
||||
{ 'path': 'nested_unboxed', 'name': 'something' },
|
||||
],
|
||||
},
|
||||
{
|
||||
'query': '-> i32, u32, bool',
|
||||
'others': [
|
||||
{ 'path': 'nested_unboxed', 'name': 'something' },
|
||||
],
|
||||
},
|
||||
{
|
||||
'query': '-> Result<i32, u32, bool>',
|
||||
'others': [
|
||||
{ 'path': 'nested_unboxed', 'name': 'something' },
|
||||
],
|
||||
},
|
||||
{
|
||||
'query': '-> Result<Object<i32>, bool>',
|
||||
'others': [
|
||||
{ 'path': 'nested_unboxed', 'name': 'something' },
|
||||
],
|
||||
},
|
||||
{
|
||||
'query': '-> Result<Object<u32>, bool>',
|
||||
'others': [
|
||||
{ 'path': 'nested_unboxed', 'name': 'something' },
|
||||
],
|
||||
},
|
||||
{
|
||||
'query': '-> Result<Object<i32>, u32, bool>',
|
||||
'others': [],
|
||||
},
|
||||
{
|
||||
'query': '-> Result<i32, Object<u32>, bool>',
|
||||
'others': [],
|
||||
},
|
||||
{
|
||||
'query': '-> Result<i32, u32, Object<bool>>',
|
||||
'others': [],
|
||||
},
|
||||
{
|
||||
'query': '-> Result<Object<i32>, Object<u32>, bool>',
|
||||
'others': [],
|
||||
},
|
||||
];
|
5
tests/rustdoc-js/nested-unboxed.rs
Normal file
5
tests/rustdoc-js/nested-unboxed.rs
Normal file
@ -0,0 +1,5 @@
|
||||
pub struct Object<T, U>(T, U);
|
||||
|
||||
pub fn something() -> Result<Object<i32, u32>, bool> {
|
||||
loop {}
|
||||
}
|
Loading…
Reference in New Issue
Block a user