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97 lines
3.4 KiB
C++
97 lines
3.4 KiB
C++
//===--- KeyPathCompletion.cpp --------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2022 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#include "swift/Basic/Assertions.h"
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#include "swift/IDE/KeyPathCompletion.h"
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#include "swift/IDE/CodeCompletion.h"
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#include "swift/IDE/CompletionLookup.h"
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#include "swift/Sema/ConstraintSystem.h"
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using namespace swift;
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using namespace swift::constraints;
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using namespace swift::ide;
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void KeyPathTypeCheckCompletionCallback::sawSolutionImpl(
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const constraints::Solution &S) {
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// Determine the code completion.
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size_t ComponentIndex = 0;
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for (auto &Component : KeyPath->getComponents()) {
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if (Component.getKind() == KeyPathExpr::Component::Kind::CodeCompletion) {
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break;
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} else {
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ComponentIndex++;
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}
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}
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assert(ComponentIndex < KeyPath->getComponents().size() &&
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"Didn't find a code compleiton component?");
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Type BaseType;
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if (ComponentIndex == 0) {
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// We are completing on the root and need to extract the key path's root
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// type.
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if (auto *rootTy = KeyPath->getExplicitRootType()) {
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BaseType = S.getResolvedType(rootTy);
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} else {
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// The key path doesn't have a root TypeRepr set, so we can't look the key
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// path's root up through it. Build a constraint locator and look the
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// root type up through it.
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// FIXME: Improve the linear search over S.typeBindings when it's possible
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// to look up type variables by their locators.
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auto RootLocator =
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S.getConstraintLocator(KeyPath, {ConstraintLocator::KeyPathRoot});
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auto BaseVariableTypeBinding =
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llvm::find_if(S.typeBindings, [&RootLocator](const auto &Entry) {
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return Entry.first->getImpl().getLocator() == RootLocator;
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});
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if (BaseVariableTypeBinding != S.typeBindings.end()) {
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BaseType = S.simplifyType(BaseVariableTypeBinding->second);
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}
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}
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} else {
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// We are completing after a component. Get the previous component's result
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// type.
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BaseType = S.simplifyType(S.getType(KeyPath, ComponentIndex - 1));
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}
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if (BaseType.isNull()) {
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return;
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}
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// If ExpectedTy is a duplicate of any other result, ignore this solution.
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if (llvm::any_of(Results, [&](const Result &R) {
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return R.BaseType->isEqual(BaseType);
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})) {
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return;
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}
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Results.push_back({BaseType, /*OnRoot=*/(ComponentIndex == 0)});
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}
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void KeyPathTypeCheckCompletionCallback::collectResults(
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DeclContext *DC, SourceLoc DotLoc,
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ide::CodeCompletionContext &CompletionCtx) {
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ASTContext &Ctx = DC->getASTContext();
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CompletionLookup Lookup(CompletionCtx.getResultSink(), Ctx, DC,
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&CompletionCtx);
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if (DotLoc.isValid()) {
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Lookup.setHaveDot(DotLoc);
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}
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Lookup.shouldCheckForDuplicates(Results.size() > 1);
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for (auto &Result : Results) {
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Lookup.setIsSwiftKeyPathExpr(Result.OnRoot);
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Lookup.getValueExprCompletions(Result.BaseType);
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}
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collectCompletionResults(CompletionCtx, Lookup, DC, ExpectedTypeContext(),
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/*CanCurrDeclContextHandleAsync=*/false);
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}
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