Merge pull request #63714 from ahoppen/ahoppen/ideinspectiontarget-charsourcerange

[IDE] Check whether an AST node contains the IDE inspection point based on `CharSourceRange`

include/swift/Basic/SourceManager.h

@@ -214,6 +214,13 @@ public:
            (isBeforeInBuffer(R.Start, Loc) && isBeforeInBuffer(Loc, R.End));
   }
 
+  /// Returns true if range \c R contains the location \c Loc.  The location
+  /// \c Loc should point at the beginning of the token.
+  bool rangeContainsTokenLoc(CharSourceRange R, SourceLoc Loc) const {
+    return Loc == R.getStart() || (isBeforeInBuffer(R.getStart(), Loc) &&
+                                   isBeforeInBuffer(Loc, R.getEnd()));
+  }
+
   /// Returns true if range \c Enclosing contains the range \c Inner.
   bool rangeContains(SourceRange Enclosing, SourceRange Inner) const {
     return rangeContainsTokenLoc(Enclosing, Inner.Start) &&
@@ -221,10 +228,11 @@ public:
   }
 
   /// Returns true if range \p R contains the code-completion location, if any.
-  bool rangeContainsIDEInspectionTarget(SourceRange R) const {
-    return IDEInspectionTargetBufferID
-               ? rangeContainsTokenLoc(R, getIDEInspectionTargetLoc())
-               : false;
+  bool rangeContainsIDEInspectionTarget(CharSourceRange R) const {
+    if (!IDEInspectionTargetBufferID) {
+      return false;
+    }
+    return rangeContainsTokenLoc(R, getIDEInspectionTargetLoc());
   }
 
   /// Returns the buffer ID for the specified *valid* location.

include/swift/Sema/CompletionContextFinder.h

@@ -126,6 +126,14 @@ private:
   }
 };
 
+
+/// Returns \c true if \p range is valid and contains the IDE inspection
+/// target. This performs the underlying check based on \c CharSourceRange
+/// to make sure we correctly return \c true if the ide inspection target
+/// is inside a string literal that's the last token in \p range.
+bool containsIDEInspectionTarget(SourceRange range,
+                                 const SourceManager &SourceMgr);
+
 } // end namespace swift
 
 #endif // SWIFT_SEMA_COMPLETIONCONTEXTFINDER_H

lib/AST/Decl.cpp

@@ -8175,8 +8175,15 @@ BraceStmt *AbstractFunctionDecl::getBody(bool canSynthesize) const {
 
   // Don't allow getBody() to trigger parsing of an unparsed body containing the
   // IDE inspection location.
+  // FIXME: We should be properly constructing the range of the the body as a
+  // CharSourceRange but we can't because we don't have access to the lexer
+  // here. Using the end location of the SourceRange works good enough here
+  // because the last token is a '}' and the IDE inspection point is not inside
+  // the closing brace.
   if (getBodyKind() == BodyKind::Unparsed &&
-      ctx.SourceMgr.rangeContainsIDEInspectionTarget(getBodySourceRange())) {
+      ctx.SourceMgr.rangeContainsIDEInspectionTarget(
+          CharSourceRange(ctx.SourceMgr, getBodySourceRange().Start,
+                          getBodySourceRange().End))) {
     return nullptr;
   }
 

lib/Parse/ParseDecl.cpp

@@ -7986,8 +7986,10 @@ void Parser::parseAbstractFunctionBody(AbstractFunctionDecl *AFD) {
   auto BodyPreviousLoc = PreviousLoc;
   SourceRange BodyRange(Tok.getLoc());
   auto setIDEInspectionDelayedDeclStateIfNeeded = [&] {
+    auto CharBodyRange =
+        Lexer::getCharSourceRangeFromSourceRange(SourceMgr, BodyRange);
     if (!isIDEInspectionFirstPass() ||
-        !SourceMgr.rangeContainsIDEInspectionTarget(BodyRange)) {
+        !SourceMgr.rangeContainsIDEInspectionTarget(CharBodyRange)) {
       return;
     }
     if (State->hasIDEInspectionDelayedDeclState())

lib/Parse/ParseExpr.cpp

@@ -1433,7 +1433,9 @@ Parser::parseExprPostfixSuffix(ParserResult<Expr> Result, bool isExprBasic,
       assert(activeElements.size() == 1 && activeElements[0].is<Expr *>());
       auto expr = activeElements[0].get<Expr *>();
       ParserStatus status(ICD);
-      if (SourceMgr.rangeContainsIDEInspectionTarget(expr->getSourceRange()) &&
+      auto charRange = Lexer::getCharSourceRangeFromSourceRange(
+          SourceMgr, expr->getSourceRange());
+      if (SourceMgr.rangeContainsIDEInspectionTarget(charRange) &&
           L->isCodeCompletion())
         status.setHasCodeCompletion();
       hasBindOptional |= exprsWithBindOptional.contains(expr);
@@ -2826,7 +2828,9 @@ ParserResult<Expr> Parser::parseExprClosure() {
   SmallVector<ASTNode, 4> bodyElements;
   Status |= parseBraceItems(bodyElements, BraceItemListKind::Brace);
 
-  if (SourceMgr.rangeContainsIDEInspectionTarget({leftBrace, PreviousLoc})) {
+  if (SourceMgr.rangeContainsIDEInspectionTarget(
+          Lexer::getCharSourceRangeFromSourceRange(SourceMgr,
+                                                   {leftBrace, PreviousLoc}))) {
     // Ignore 'IDEInspectionDelayedDeclState' inside closures.
     // Completions inside functions body inside closures at top level should
     // be considered top-level completions.

lib/Sema/BuilderTransform.cpp

@@ -16,9 +16,8 @@
 //===----------------------------------------------------------------------===//
 
 #include "MiscDiagnostics.h"
-#include "TypeChecker.h"
 #include "TypeCheckAvailability.h"
-#include "swift/Sema/IDETypeChecking.h"
+#include "TypeChecker.h"
 #include "swift/AST/ASTPrinter.h"
 #include "swift/AST/ASTVisitor.h"
 #include "swift/AST/ASTWalker.h"
@@ -27,14 +26,15 @@
 #include "swift/AST/ParameterList.h"
 #include "swift/AST/TypeCheckRequests.h"
 #include "swift/Sema/ConstraintSystem.h"
+#include "swift/Sema/IDETypeChecking.h"
 #include "swift/Sema/SolutionResult.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/SmallVector.h"
 #include <iterator>
 #include <map>
 #include <memory>
-#include <utility>
 #include <tuple>
+#include <utility>
 
 using namespace swift;
 using namespace constraints;

lib/Sema/CompletionContextFinder.cpp

@@ -11,6 +11,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "swift/Sema/CompletionContextFinder.h"
+#include "swift/Parse/Lexer.h"
 
 using namespace swift;
 using Fallback = CompletionContextFinder::Fallback;
@@ -132,3 +133,11 @@ Optional<Fallback> CompletionContextFinder::getFallbackCompletionExpr() const {
     return Fallback{getCompletionExpr(), fallbackDC, separatePrecheck};
   return None;
 }
+
+bool swift::containsIDEInspectionTarget(SourceRange range,
+                                        const SourceManager &SourceMgr) {
+  if (range.isInvalid())
+    return false;
+  auto charRange = Lexer::getCharSourceRangeFromSourceRange(SourceMgr, range);
+  return SourceMgr.rangeContainsIDEInspectionTarget(charRange);
+}

lib/Sema/ConstraintSystem.cpp

@@ -31,6 +31,7 @@
 #include "swift/Basic/Statistic.h"
 #include "swift/Sema/CSFix.h"
 #include "swift/Sema/ConstraintGraph.h"
+#include "swift/Sema/IDETypeChecking.h"
 #include "swift/Sema/SolutionResult.h"
 #include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/SmallSet.h"
@@ -353,18 +354,14 @@ ConstraintSystem::getAlternativeLiteralTypes(KnownProtocolKind kind,
 }
 
 bool ConstraintSystem::containsIDEInspectionTarget(ASTNode node) const {
-  SourceRange range = node.getSourceRange();
-  if (range.isInvalid())
-    return false;
-  return Context.SourceMgr.rangeContainsIDEInspectionTarget(range);
+  return swift::containsIDEInspectionTarget(node.getSourceRange(),
+                                            Context.SourceMgr);
 }
 
 bool ConstraintSystem::containsIDEInspectionTarget(
     const ArgumentList *args) const {
-  SourceRange range = args->getSourceRange();
-  if (range.isInvalid())
-    return false;
-  return Context.SourceMgr.rangeContainsIDEInspectionTarget(range);
+  return swift::containsIDEInspectionTarget(args->getSourceRange(),
+                                            Context.SourceMgr);
 }
 
 ConstraintLocator *ConstraintSystem::getConstraintLocator(

lib/Sema/TypeCheckCodeCompletion.cpp

@@ -14,14 +14,13 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "swift/Subsystems.h"
-#include "TypeChecker.h"
-#include "TypeCheckObjC.h"
-#include "TypeCheckType.h"
 #include "CodeSynthesis.h"
 #include "MiscDiagnostics.h"
-#include "swift/AST/ASTWalker.h"
+#include "TypeCheckObjC.h"
+#include "TypeCheckType.h"
+#include "TypeChecker.h"
 #include "swift/AST/ASTVisitor.h"
+#include "swift/AST/ASTWalker.h"
 #include "swift/AST/Attr.h"
 #include "swift/AST/DiagnosticSuppression.h"
 #include "swift/AST/ExistentialLayout.h"
@@ -37,13 +36,15 @@
 #include "swift/AST/Type.h"
 #include "swift/AST/TypeCheckRequests.h"
 #include "swift/Basic/Defer.h"
-#include "swift/Basic/Statistic.h"
 #include "swift/Basic/STLExtras.h"
+#include "swift/Basic/Statistic.h"
+#include "swift/Parse/IDEInspectionCallbacks.h"
 #include "swift/Parse/Lexer.h"
-#include "swift/Sema/IDETypeChecking.h"
-#include "swift/Sema/ConstraintSystem.h"
 #include "swift/Sema/CompletionContextFinder.h"
+#include "swift/Sema/ConstraintSystem.h"
+#include "swift/Sema/IDETypeChecking.h"
 #include "swift/Strings.h"
+#include "swift/Subsystems.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/PointerUnion.h"
 #include "llvm/ADT/SmallSet.h"
@@ -565,7 +566,7 @@ bool TypeChecker::typeCheckForCodeCompletion(
   {
     auto range = target.getSourceRange();
     if (range.isInvalid() ||
-        !Context.SourceMgr.rangeContainsIDEInspectionTarget(range))
+        !containsIDEInspectionTarget(range, Context.SourceMgr))
       return false;
   }