[Diagnostics] Update compiler diagnostics to use less jargon. (swiftlang#31384)

Fixes rdar://problem/62375243.

Author: varungandhi-apple

include/swift/AST/DiagnosticsSema.def

@@ -795,19 +795,19 @@ ERROR(unspaced_unary_operator,none,
       "unary operators must not be juxtaposed; parenthesize inner expression",
       ())
 
-ERROR(use_unresolved_identifier,none,
-      "use of unresolved %select{identifier|operator}1 %0", (DeclNameRef, bool))
-ERROR(use_unresolved_identifier_corrected,none,
-      "use of unresolved %select{identifier|operator}1 %0; did you mean '%2'?",
+ERROR(cannot_find_in_scope,none,
+      "cannot %select{find|find operator}1 %0 in scope", (DeclNameRef, bool))
+ERROR(cannot_find_in_scope_corrected,none,
+      "cannot %select{find|find operator}1 %0 in scope; did you mean '%2'?",
       (DeclNameRef, bool, StringRef))
 NOTE(confusable_character,none,
       "%select{identifier|operator}0 '%1' contains possibly confused characters; "
       "did you mean to use '%2'?",
       (bool, StringRef, StringRef))
-ERROR(use_undeclared_type,none,
-      "use of undeclared type %0", (DeclNameRef))
-ERROR(use_undeclared_type_did_you_mean,none,
-      "use of undeclared type %0; did you mean to use '%1'?", (DeclNameRef, StringRef))
+ERROR(cannot_find_type_in_scope,none,
+      "cannot find type %0 in scope", (DeclNameRef))
+ERROR(cannot_find_type_in_scope_did_you_mean,none,
+      "cannot find type %0 in scope; did you mean to use '%1'?", (DeclNameRef, StringRef))
 NOTE(note_typo_candidate_implicit_member,none,
      "did you mean the implicitly-synthesized %1 '%0'?", (StringRef, StringRef))
 NOTE(note_remapped_type,none,
@@ -3669,9 +3669,9 @@ ERROR(continue_not_in_this_stmt,none,
       "'continue' cannot be used with %0 statements", (StringRef))
 
 ERROR(unresolved_label,none,
-      "use of unresolved label %0", (Identifier))
+      "cannot find label %0 in scope", (Identifier))
 ERROR(unresolved_label_corrected,none,
-      "use of unresolved label %0; did you mean %1?",
+      "cannot find label %0 in scope; did you mean %1?",
       (Identifier, Identifier))
 
 ERROR(foreach_sequence_does_not_conform_to_expected_protocol,none,

lib/Sema/PCMacro.cpp

@@ -575,7 +575,7 @@ class Instrumenter : InstrumenterBase {
         Context, BeforeLoggerRef, ArgsWithSourceRange, ArgLabels);
     Added<ApplyExpr *> AddedBeforeLogger(BeforeLoggerCall);
     if (!doTypeCheck(Context, TypeCheckDC, AddedBeforeLogger)) {
-      // typically due to 'use of unresolved identifier '__builtin_pc_before''
+      // typically due to 'cannot find '__builtin_pc_before' in scope'
       return E; // return E, it will be used in recovering from TC failure
     }
 
@@ -587,7 +587,7 @@ class Instrumenter : InstrumenterBase {
         Context, AfterLoggerRef, ArgsWithSourceRange, ArgLabels);
     Added<ApplyExpr *> AddedAfterLogger(AfterLoggerCall);
     if (!doTypeCheck(Context, TypeCheckDC, AddedAfterLogger)) {
-      // typically due to 'use of unresolved identifier '__builtin_pc_after''
+      // typically due to 'cannot find '__builtin_pc_after' in scope'
       return E; // return E, it will be used in recovering from TC failure
     }
 

lib/Sema/TypeCheckAttr.cpp

@@ -3671,7 +3671,7 @@ static AbstractFunctionDecl *findAbstractFunctionDecl(
 
   // Otherwise, emit the appropriate diagnostic and return nullptr.
   if (results.empty()) {
-    ctx.Diags.diagnose(funcNameLoc, diag::use_unresolved_identifier, funcName,
+    ctx.Diags.diagnose(funcNameLoc, diag::cannot_find_in_scope, funcName,
                        funcName.isOperator());
     return nullptr;
   }

lib/Sema/TypeCheckConstraints.cpp

@@ -392,7 +392,7 @@ static bool diagnoseRangeOperatorMisspell(DiagnosticEngine &Diags,
 
   if (!corrected.empty()) {
     Diags
-        .diagnose(UDRE->getLoc(), diag::use_unresolved_identifier_corrected,
+        .diagnose(UDRE->getLoc(), diag::cannot_find_in_scope_corrected,
                   UDRE->getName(), true, corrected)
         .highlight(UDRE->getSourceRange())
         .fixItReplace(UDRE->getSourceRange(), corrected);
@@ -416,7 +416,7 @@ static bool diagnoseIncDecOperator(DiagnosticEngine &Diags,
 
   if (!corrected.empty()) {
     Diags
-        .diagnose(UDRE->getLoc(), diag::use_unresolved_identifier_corrected,
+        .diagnose(UDRE->getLoc(), diag::cannot_find_in_scope_corrected,
                   UDRE->getName(), true, corrected)
         .highlight(UDRE->getSourceRange());
 
@@ -537,7 +537,7 @@ Expr *TypeChecker::resolveDeclRefExpr(UnresolvedDeclRefExpr *UDRE,
 
     auto emitBasicError = [&] {
       Context.Diags
-          .diagnose(Loc, diag::use_unresolved_identifier, Name,
+          .diagnose(Loc, diag::cannot_find_in_scope, Name,
                     Name.isOperator())
           .highlight(UDRE->getSourceRange());
     };
@@ -561,7 +561,7 @@ Expr *TypeChecker::resolveDeclRefExpr(UnresolvedDeclRefExpr *UDRE,
 
       if (auto typo = corrections.claimUniqueCorrection()) {
         auto diag = Context.Diags.diagnose(
-            Loc, diag::use_unresolved_identifier_corrected, Name,
+            Loc, diag::cannot_find_in_scope_corrected, Name,
             Name.isOperator(), typo->CorrectedName.getBaseIdentifier().str());
         diag.highlight(UDRE->getSourceRange());
         typo->addFixits(diag);

lib/Sema/TypeCheckExprObjC.cpp

@@ -263,7 +263,7 @@ Optional<Type> TypeChecker::checkObjCKeyPathExpr(DeclContext *dc,
         diags.diagnose(componentNameLoc, diag::could_not_find_type_member,
                        currentType, componentName);
       else
-        diags.diagnose(componentNameLoc, diag::use_unresolved_identifier,
+        diags.diagnose(componentNameLoc, diag::cannot_find_in_scope,
                        componentName, false);
 
       // Note all the correction candidates.

lib/Sema/TypeCheckType.cpp

@@ -1141,7 +1141,7 @@ static Type diagnoseUnknownType(TypeResolution resolution,
     auto I = Remapped.find(TypeName);
     if (I != Remapped.end()) {
       auto RemappedTy = I->second->getString();
-      diags.diagnose(L, diag::use_undeclared_type_did_you_mean,
+      diags.diagnose(L, diag::cannot_find_type_in_scope_did_you_mean,
                      comp->getNameRef(), RemappedTy)
         .highlight(R)
         .fixItReplace(R, RemappedTy);
@@ -1158,7 +1158,7 @@ static Type diagnoseUnknownType(TypeResolution resolution,
       return I->second;
     }
 
-    diags.diagnose(L, diag::use_undeclared_type,
+    diags.diagnose(L, diag::cannot_find_type_in_scope,
                 comp->getNameRef())
       .highlight(R);
 
@@ -1654,7 +1654,7 @@ Type TypeChecker::resolveIdentifierType(
     if (!options.contains(TypeResolutionFlags::SilenceErrors)) {
       auto moduleName = moduleTy->getModule()->getName();
       diags.diagnose(Components.back()->getNameLoc(),
-                     diag::use_undeclared_type, DeclNameRef(moduleName));
+                     diag::cannot_find_type_in_scope, DeclNameRef(moduleName));
       diags.diagnose(Components.back()->getNameLoc(),
                      diag::note_module_as_type, moduleName);
     }

test/APINotes/versioned.swift

@@ -158,7 +158,7 @@ func testRenamedUnknownEnum() {
 }
 
 func testRenamedTrueEnum() {
-  // CHECK-DIAGS: [[@LINE+1]]:7: error: use of unresolved identifier 'TrueEnumValue'
+  // CHECK-DIAGS: [[@LINE+1]]:7: error: cannot find 'TrueEnumValue' in scope
   _ = TrueEnumValue
 
   // CHECK-DIAGS: [[@LINE+1]]:16: error: type 'TrueEnum' has no member 'TrueEnumValue'
@@ -169,7 +169,7 @@ func testRenamedTrueEnum() {
 
   _ = TrueEnum.value // okay
 
-  // CHECK-DIAGS: [[@LINE+1]]:7: error: use of unresolved identifier 'TrueEnumRenamed'
+  // CHECK-DIAGS: [[@LINE+1]]:7: error: cannot find 'TrueEnumRenamed' in scope
   _ = TrueEnumRenamed
 
   // CHECK-DIAGS: [[@LINE+1]]:16: error: type 'TrueEnum' has no member 'TrueEnumRenamed'
@@ -190,7 +190,7 @@ func testRenamedTrueEnum() {
   _ = TrueEnum.renamedSwift4
   // CHECK-DIAGS-4-NOT: :[[@LINE-1]]:16:
 
-  // CHECK-DIAGS: [[@LINE+1]]:7: error: use of unresolved identifier 'TrueEnumAliasRenamed'
+  // CHECK-DIAGS: [[@LINE+1]]:7: error: cannot find 'TrueEnumAliasRenamed' in scope
   _ = TrueEnumAliasRenamed
 
   // CHECK-DIAGS: [[@LINE+1]]:16: error: type 'TrueEnum' has no member 'TrueEnumAliasRenamed'
@@ -213,7 +213,7 @@ func testRenamedTrueEnum() {
 }
 
 func testRenamedOptionyEnum() {
-  // CHECK-DIAGS: [[@LINE+1]]:7: error: use of unresolved identifier 'OptionyEnumValue'
+  // CHECK-DIAGS: [[@LINE+1]]:7: error: cannot find 'OptionyEnumValue' in scope
   _ = OptionyEnumValue
 
   // CHECK-DIAGS: [[@LINE+1]]:19: error: type 'OptionyEnum' has no member 'OptionyEnumValue'
@@ -224,7 +224,7 @@ func testRenamedOptionyEnum() {
 
   _ = OptionyEnum.value // okay
 
-  // CHECK-DIAGS: [[@LINE+1]]:7: error: use of unresolved identifier 'OptionyEnumRenamed'
+  // CHECK-DIAGS: [[@LINE+1]]:7: error: cannot find 'OptionyEnumRenamed' in scope
   _ = OptionyEnumRenamed
 
   // CHECK-DIAGS: [[@LINE+1]]:19: error: type 'OptionyEnum' has no member 'OptionyEnumRenamed'

test/AutoDiff/Sema/DerivedConformances/class_differentiable.swift

@@ -490,7 +490,7 @@ where T: Differentiable {}
 
 // TF-265: Test invalid initializer (that uses a non-existent type).
 class InvalidInitializer: Differentiable {
-  init(filterShape: (Int, Int, Int, Int), blah: NonExistentType) {}  // expected-error {{use of undeclared type 'NonExistentType'}}
+  init(filterShape: (Int, Int, Int, Int), blah: NonExistentType) {}  // expected-error {{cannot find type 'NonExistentType' in scope}}
 }
 
 // Test memberwise initializer synthesis.

test/AutoDiff/Sema/DerivedConformances/struct_differentiable.swift

@@ -308,7 +308,7 @@ where T: Differentiable {}
 
 // TF-265: Test invalid initializer (that uses a non-existent type).
 struct InvalidInitializer: Differentiable {
-  init(filterShape: (Int, Int, Int, Int), blah: NonExistentType) {}  // expected-error {{use of undeclared type 'NonExistentType'}}
+  init(filterShape: (Int, Int, Int, Int), blah: NonExistentType) {}  // expected-error {{cannot find type 'NonExistentType' in scope}}
 }
 
 // Test memberwise initializer synthesis.

test/AutoDiff/Sema/derivative_attr_type_checking.swift

@@ -70,15 +70,15 @@ func vjpSubtractWrt1(x: Float, y: Float) -> (value: Float, pullback: (Float) ->
 
 // Test invalid original function.
 
-// expected-error @+1 {{use of unresolved identifier 'nonexistentFunction'}}
+// expected-error @+1 {{cannot find 'nonexistentFunction' in scope}}
 @derivative(of: nonexistentFunction)
 func vjpOriginalFunctionNotFound(_ x: Float) -> (value: Float, pullback: (Float) -> Float) {
   fatalError()
 }
 
 // Test `@derivative` attribute where `value:` result does not conform to `Differentiable`.
 // Invalid original function should be diagnosed first.
-// expected-error @+1 {{use of unresolved identifier 'nonexistentFunction'}}
+// expected-error @+1 {{cannot find 'nonexistentFunction' in scope}}
 @derivative(of: nonexistentFunction)
 func vjpOriginalFunctionNotFound2(_ x: Float) -> (value: Int, pullback: (Float) -> Float) {
   fatalError()