PRECOND -> REQUIRE

c++/src/capnproto/benchmark/capnproto-common.h

@@ -181,7 +181,7 @@ struct UseScratch {
     word* words;
 
     ScratchSpace() {
-      PRECOND(scratchCounter < 6, "Too many scratch spaces needed at once.");
+      REQUIRE(scratchCounter < 6, "Too many scratch spaces needed at once.");
       words = scratchSpace + scratchCounter++ * SCRATCH_SIZE;
     }
     ~ScratchSpace() {

c++/src/capnproto/blob.h

@@ -76,7 +76,7 @@ public:
   inline const char operator[](uint index) const { return bytes[index]; }
 
   inline Reader slice(uint start, uint end) const {
-    KJ_INLINE_DPRECOND(start <= end && end <= size_, "Out-of-bounds slice.");
+    KJ_IREQUIRE(start <= end && end <= size_, "Out-of-bounds slice.");
     return Reader(bytes + start, end - start);
   }
 
@@ -121,13 +121,13 @@ public:
   inline Reader(const char* text): Data::Reader(text, strlen(text)) {}
   inline Reader(char* text): Data::Reader(text, strlen(text)) {}
   inline Reader(const char* text, uint size): Data::Reader(text, size) {
-    KJ_INLINE_DPRECOND(text[size] == '\0', "Text must be NUL-terminated.");
+    KJ_IREQUIRE(text[size] == '\0', "Text must be NUL-terminated.");
   }
 
   template <typename T>
   inline Reader(const T& other): Data::Reader(other.c_str(), other.size()) {
     // Primarily intended for converting from std::string.
-    KJ_INLINE_DPRECOND(data()[size()] == '\0', "Text must be NUL-terminated.");
+    KJ_IREQUIRE(data()[size()] == '\0', "Text must be NUL-terminated.");
   }
 
   inline const char* c_str() const { return data(); }
@@ -164,7 +164,7 @@ public:
   inline char& operator[](uint index) const { return bytes[index]; }
 
   inline Builder slice(uint start, uint end) const {
-    KJ_INLINE_DPRECOND(start <= end && end <= size_, "Out-of-bounds slice.");
+    KJ_IREQUIRE(start <= end && end <= size_, "Out-of-bounds slice.");
     return Builder(bytes + start, end - start);
   }
 
@@ -183,7 +183,7 @@ public:
 
   template <typename T>
   inline void copyFrom(const T& other) const {
-    KJ_INLINE_DPRECOND(size() == other.size(), "Sizes must match to copy.");
+    KJ_IREQUIRE(size() == other.size(), "Sizes must match to copy.");
     memcpy(bytes, other.data(), other.size());
   }
   inline void copyFrom(const void* other) const {

c++/src/capnproto/compiler/capnpc-capnp.c++

@@ -217,7 +217,7 @@ Text::Reader getUnqualifiedName(Schema schema) {
       return nested.getName();
     }
   }
-  FAIL_PRECOND("A schema Node's supposed scope did not contain the node as a NestedNode.");
+  FAIL_REQUIRE("A schema Node's supposed scope did not contain the node as a NestedNode.");
   return "(?)";
 }
 
@@ -365,22 +365,22 @@ TextBlob genValue(schema::Type::Reader type, schema::Value::Reader value, Schema
     case schema::Value::Body::TEXT_VALUE: return text(DynamicValue::Reader(body.getTextValue()));
     case schema::Value::Body::DATA_VALUE: return text(DynamicValue::Reader(body.getDataValue()));
     case schema::Value::Body::LIST_VALUE: {
-      PRECOND(type.getBody().which() == schema::Type::Body::LIST_TYPE, "type/value mismatch");
+      REQUIRE(type.getBody().which() == schema::Type::Body::LIST_TYPE, "type/value mismatch");
       auto value = body.getListValue<DynamicList>(
           ListSchema::of(type.getBody().getListType(), scope));
       return text(value);
     }
     case schema::Value::Body::ENUM_VALUE: {
-      PRECOND(type.getBody().which() == schema::Type::Body::ENUM_TYPE, "type/value mismatch");
+      REQUIRE(type.getBody().which() == schema::Type::Body::ENUM_TYPE, "type/value mismatch");
       auto enumNode = scope.getDependency(type.getBody().getEnumType()).asEnum().getProto();
       auto enumType = enumNode.getBody().getEnumNode();
       auto enumerants = enumType.getEnumerants();
-      PRECOND(body.getEnumValue() < enumerants.size(),
+      REQUIRE(body.getEnumValue() < enumerants.size(),
               "Enum value out-of-range.", body.getEnumValue(), enumNode.getDisplayName());
       return text(enumerants[body.getEnumValue()].getName());
     }
     case schema::Value::Body::STRUCT_VALUE: {
-      PRECOND(type.getBody().which() == schema::Type::Body::STRUCT_TYPE, "type/value mismatch");
+      REQUIRE(type.getBody().which() == schema::Type::Body::STRUCT_TYPE, "type/value mismatch");
       auto value = body.getStructValue<DynamicStruct>(
           scope.getDependency(type.getBody().getStructType()).asStruct());
       return text(value);
@@ -400,7 +400,7 @@ TextBlob genAnnotation(schema::Annotation::Reader annotation,
                        const char* prefix = " ", const char* suffix = "") {
   auto decl = schemaLoader.get(annotation.getId());
   auto body = decl.getProto().getBody();
-  PRECOND(body.which() == schema::Node::Body::ANNOTATION_NODE);
+  REQUIRE(body.which() == schema::Node::Body::ANNOTATION_NODE);
   auto annDecl = body.getAnnotationNode();
 
   return text(prefix, "$", nodeName(decl, scope), "(",
@@ -468,12 +468,12 @@ TextBlob genDecl(Schema schema, Text::Reader name, uint64_t scopeId, Indent inde
   auto proto = schema.getProto();
   if (proto.getScopeId() != scopeId) {
     // This appears to be an alias for something declared elsewhere.
-    FAIL_PRECOND("Aliases not implemented.");
+    FAIL_REQUIRE("Aliases not implemented.");
   }
 
   switch (proto.getBody().which()) {
     case schema::Node::Body::FILE_NODE:
-      FAIL_PRECOND("Encountered nested file node.");
+      FAIL_REQUIRE("Encountered nested file node.");
       break;
     case schema::Node::Body::STRUCT_NODE: {
       auto body = proto.getBody().getStructNode();
@@ -578,7 +578,7 @@ TextBlob genNestedDecls(Schema schema, Indent indent) {
 TextBlob genFile(Schema file) {
   auto proto = file.getProto();
   auto body = proto.getBody();
-  PRECOND(body.which() == schema::Node::Body::FILE_NODE, "Expected a file node.",
+  REQUIRE(body.which() == schema::Node::Body::FILE_NODE, "Expected a file node.",
           (uint)body.which());
 
   return text(

c++/src/capnproto/layout.c++

@@ -102,12 +102,12 @@ struct WirePointer {
   }
 
   KJ_ALWAYS_INLINE(WordCount farPositionInSegment() const) {
-    DPRECOND(kind() == FAR,
+    DREQUIRE(kind() == FAR,
         "positionInSegment() should only be called on FAR pointers.");
     return (offsetAndKind.get() >> 3) * WORDS;
   }
   KJ_ALWAYS_INLINE(bool isDoubleFar() const) {
-    DPRECOND(kind() == FAR,
+    DREQUIRE(kind() == FAR,
         "isDoubleFar() should only be called on FAR pointers.");
     return (offsetAndKind.get() >> 2) & 1;
   }
@@ -155,12 +155,12 @@ struct WirePointer {
       }
 
       KJ_ALWAYS_INLINE(void set(FieldSize es, ElementCount ec)) {
-        DPRECOND(ec < (1 << 29) * ELEMENTS, "Lists are limited to 2**29 elements.");
+        DREQUIRE(ec < (1 << 29) * ELEMENTS, "Lists are limited to 2**29 elements.");
         elementSizeAndCount.set(((ec / ELEMENTS) << 3) | static_cast<int>(es));
       }
 
       KJ_ALWAYS_INLINE(void setInlineComposite(WordCount wc)) {
-        DPRECOND(wc < (1 << 29) * WORDS, "Inline composite lists are limited to 2**29 words.");
+        DREQUIRE(wc < (1 << 29) * WORDS, "Inline composite lists are limited to 2**29 words.");
         elementSizeAndCount.set(((wc / WORDS) << 3) |
                                 static_cast<int>(FieldSize::INLINE_COMPOSITE));
       }
@@ -656,7 +656,7 @@ struct WireHelpers {
         break;
       }
       default:
-        FAIL_PRECOND("Copy source message contained unexpected kind.");
+        FAIL_REQUIRE("Copy source message contained unexpected kind.");
         break;
     }
 
@@ -796,7 +796,7 @@ struct WireHelpers {
   static KJ_ALWAYS_INLINE(ListBuilder initListPointer(
       WirePointer* ref, SegmentBuilder* segment, ElementCount elementCount,
       FieldSize elementSize)) {
-    DPRECOND(elementSize != FieldSize::INLINE_COMPOSITE,
+    DREQUIRE(elementSize != FieldSize::INLINE_COMPOSITE,
         "Should have called initStructListPointer() instead.");
 
     BitCount dataSize = dataBitsPerElement(elementSize) * ELEMENTS;
@@ -848,7 +848,7 @@ struct WireHelpers {
   static KJ_ALWAYS_INLINE(ListBuilder getWritableListPointer(
       WirePointer* origRef, SegmentBuilder* origSegment, FieldSize elementSize,
       const word* defaultValue)) {
-    DPRECOND(elementSize != FieldSize::INLINE_COMPOSITE,
+    DREQUIRE(elementSize != FieldSize::INLINE_COMPOSITE,
              "Use getStructList{Element,Field}() for structs.");
 
     if (origRef->isNull()) {
@@ -886,7 +886,7 @@ struct WireHelpers {
 
       // Read the tag to get the actual element count.
       WirePointer* tag = reinterpret_cast<WirePointer*>(ptr);
-      PRECOND(tag->kind() == WirePointer::STRUCT,
+      REQUIRE(tag->kind() == WirePointer::STRUCT,
           "INLINE_COMPOSITE list with non-STRUCT elements not supported.");
       ptr += POINTER_SIZE_IN_WORDS;
 
@@ -1226,9 +1226,9 @@ struct WireHelpers {
     } else {
       word* ptr = followFars(ref, segment);
 
-      PRECOND(ref->kind() == WirePointer::LIST,
+      REQUIRE(ref->kind() == WirePointer::LIST,
           "Called getText{Field,Element}() but existing pointer is not a list.");
-      PRECOND(ref->listRef.elementSize() == FieldSize::BYTE,
+      REQUIRE(ref->listRef.elementSize() == FieldSize::BYTE,
           "Called getText{Field,Element}() but existing list pointer is not byte-sized.");
 
       // Subtract 1 from the size for the NUL terminator.
@@ -1263,9 +1263,9 @@ struct WireHelpers {
     } else {
       word* ptr = followFars(ref, segment);
 
-      PRECOND(ref->kind() == WirePointer::LIST,
+      REQUIRE(ref->kind() == WirePointer::LIST,
           "Called getData{Field,Element}() but existing pointer is not a list.");
-      PRECOND(ref->listRef.elementSize() == FieldSize::BYTE,
+      REQUIRE(ref->listRef.elementSize() == FieldSize::BYTE,
           "Called getData{Field,Element}() but existing list pointer is not byte-sized.");
 
       return Data::Builder(reinterpret_cast<char*>(ptr), ref->listRef.elementCount() / ELEMENTS);
@@ -1291,7 +1291,7 @@ struct WireHelpers {
       if (ref->listRef.elementSize() == FieldSize::INLINE_COMPOSITE) {
         // Read the tag to get the actual element count.
         WirePointer* tag = reinterpret_cast<WirePointer*>(ptr);
-        PRECOND(tag->kind() == WirePointer::STRUCT,
+        REQUIRE(tag->kind() == WirePointer::STRUCT,
             "INLINE_COMPOSITE list with non-STRUCT elements not supported.");
 
         // First list element is at tag + 1 pointer.
@@ -1951,7 +1951,7 @@ ObjectReader StructReader::getObjectField(
 }
 
 const word* StructReader::getUncheckedPointer(WirePointerCount ptrIndex) const {
-  PRECOND(segment == nullptr, "getUncheckedPointer() only allowed on unchecked messages.");
+  REQUIRE(segment == nullptr, "getUncheckedPointer() only allowed on unchecked messages.");
   return reinterpret_cast<const word*>(pointers + ptrIndex);
 }
 

c++/src/capnproto/message.c++

@@ -146,10 +146,10 @@ MallocMessageBuilder::MallocMessageBuilder(
     kj::ArrayPtr<word> firstSegment, AllocationStrategy allocationStrategy)
     : nextSize(firstSegment.size()), allocationStrategy(allocationStrategy),
       ownFirstSegment(false), returnedFirstSegment(false), firstSegment(firstSegment.begin()) {
-  PRECOND(firstSegment.size() > 0, "First segment size must be non-zero.");
+  REQUIRE(firstSegment.size() > 0, "First segment size must be non-zero.");
 
   // Checking just the first word should catch most cases of failing to zero the segment.
-  PRECOND(*reinterpret_cast<uint64_t*>(firstSegment.begin()) == 0,
+  REQUIRE(*reinterpret_cast<uint64_t*>(firstSegment.begin()) == 0,
           "First segment must be zeroed.");
 }
 
@@ -218,12 +218,12 @@ FlatMessageBuilder::FlatMessageBuilder(kj::ArrayPtr<word> array): array(array),
 FlatMessageBuilder::~FlatMessageBuilder() {}
 
 void FlatMessageBuilder::requireFilled() {
-  PRECOND(getSegmentsForOutput()[0].end() == array.end(),
+  REQUIRE(getSegmentsForOutput()[0].end() == array.end(),
           "FlatMessageBuilder's buffer was too large.");
 }
 
 kj::ArrayPtr<word> FlatMessageBuilder::allocateSegment(uint minimumSize) {
-  PRECOND(!allocated, "FlatMessageBuilder's buffer was not large enough.");
+  REQUIRE(!allocated, "FlatMessageBuilder's buffer was not large enough.");
   allocated = true;
   return array;
 }

c++/src/capnproto/schema-loader.c++

@@ -447,7 +447,7 @@ public:
     CONTEXT("checking compatibility with previously-loaded node of the same id",
             existingNode.getDisplayName());
 
-    DPRECOND(existingNode.getId() == replacement.getId());
+    DREQUIRE(existingNode.getId() == replacement.getId());
 
     nodeName = existingNode.getDisplayName();
     compatibility = EQUIVALENT;
@@ -1026,7 +1026,7 @@ internal::RawSchema* SchemaLoader::Impl::loadNative(const internal::RawSchema* n
   if (slot == nullptr) {
     slot = allocate<internal::RawSchema>();
   } else if (slot->canCastTo != nullptr) {
-    PRECOND(slot->canCastTo == nativeSchema,
+    REQUIRE(slot->canCastTo == nativeSchema,
         "two different compiled-in type have the same type ID",
         reader.getId(), reader.getDisplayName(),
         readMessageUnchecked<schema::Node>(slot->canCastTo->encodedNode).getDisplayName());
@@ -1079,7 +1079,7 @@ internal::RawSchema* SchemaLoader::Impl::loadEmpty(
     case schema::Node::Body::FILE_NODE:
     case schema::Node::Body::CONST_NODE:
     case schema::Node::Body::ANNOTATION_NODE:
-      FAIL_PRECOND("Not a type.");
+      FAIL_REQUIRE("Not a type.");
       break;
   }
 
@@ -1111,7 +1111,7 @@ SchemaLoader::~SchemaLoader() {}
 
 Schema SchemaLoader::get(uint64_t id) const {
   internal::RawSchema* raw = impl->tryGet(id);
-  PRECOND(raw != nullptr, "no schema node loaded for id", id);
+  REQUIRE(raw != nullptr, "no schema node loaded for id", id);
   return Schema(raw);
 }
 

c++/src/capnproto/schema.c++

@@ -51,33 +51,33 @@ Schema Schema::getDependency(uint64_t id) const {
     }
   }
 
-  FAIL_PRECOND("Requested ID not found in dependency table.", id);
+  FAIL_REQUIRE("Requested ID not found in dependency table.", id);
   return Schema();
 }
 
 StructSchema Schema::asStruct() const {
-  PRECOND(getProto().getBody().which() == schema::Node::Body::STRUCT_NODE,
+  REQUIRE(getProto().getBody().which() == schema::Node::Body::STRUCT_NODE,
           "Tried to use non-struct schema as a struct.",
           getProto().getDisplayName());
   return StructSchema(raw);
 }
 
 EnumSchema Schema::asEnum() const {
-  PRECOND(getProto().getBody().which() == schema::Node::Body::ENUM_NODE,
+  REQUIRE(getProto().getBody().which() == schema::Node::Body::ENUM_NODE,
           "Tried to use non-enum schema as an enum.",
           getProto().getDisplayName());
   return EnumSchema(raw);
 }
 
 InterfaceSchema Schema::asInterface() const {
-  PRECOND(getProto().getBody().which() == schema::Node::Body::INTERFACE_NODE,
+  REQUIRE(getProto().getBody().which() == schema::Node::Body::INTERFACE_NODE,
           "Tried to use non-interface schema as an interface.",
           getProto().getDisplayName());
   return InterfaceSchema(raw);
 }
 
 void Schema::requireUsableAs(const internal::RawSchema* expected) {
-  PRECOND(raw == expected ||
+  REQUIRE(raw == expected ||
           (raw != nullptr && expected != nullptr && raw->canCastTo == expected),
           "This schema is not compatible with the requested native type.");
 }
@@ -132,7 +132,7 @@ StructSchema::Member StructSchema::getMemberByName(Text::Reader name) const {
   KJ_IF_MAYBE(member, findMemberByName(name)) {
     return *member;
   } else {
-    FAIL_PRECOND("struct has no such member", name);
+    FAIL_REQUIRE("struct has no such member", name);
   }
 }
 
@@ -142,7 +142,7 @@ kj::Maybe<StructSchema::Union> StructSchema::Member::getContainingUnion() const
 }
 
 StructSchema::Union StructSchema::Member::asUnion() const {
-  PRECOND(proto.getBody().which() == schema::StructNode::Member::Body::UNION_MEMBER,
+  REQUIRE(proto.getBody().which() == schema::StructNode::Member::Body::UNION_MEMBER,
           "Tried to use non-union struct member as a union.",
           parent.getProto().getDisplayName(), proto.getName());
   return Union(*this);
@@ -160,7 +160,7 @@ StructSchema::Member StructSchema::Union::getMemberByName(Text::Reader name) con
   KJ_IF_MAYBE(member, findMemberByName(name)) {
     return *member;
   } else {
-    FAIL_PRECOND("union has no such member", name);
+    FAIL_REQUIRE("union has no such member", name);
   }
 }
 
@@ -178,7 +178,7 @@ EnumSchema::Enumerant EnumSchema::getEnumerantByName(Text::Reader name) const {
   KJ_IF_MAYBE(enumerant, findEnumerantByName(name)) {
     return *enumerant;
   } else {
-    FAIL_PRECOND("enum has no such enumerant", name);
+    FAIL_REQUIRE("enum has no such enumerant", name);
   }
 }
 
@@ -196,7 +196,7 @@ InterfaceSchema::Method InterfaceSchema::getMethodByName(Text::Reader name) cons
   KJ_IF_MAYBE(method, findMethodByName(name)) {
     return *method;
   } else {
-    FAIL_PRECOND("interface has no such method", name);
+    FAIL_REQUIRE("interface has no such method", name);
   }
 }
 
@@ -224,11 +224,11 @@ ListSchema ListSchema::of(schema::Type::Body::Which primitiveType) {
     case schema::Type::Body::ENUM_TYPE:
     case schema::Type::Body::INTERFACE_TYPE:
     case schema::Type::Body::LIST_TYPE:
-      FAIL_PRECOND("Must use one of the other ListSchema::of() overloads for complex types.");
+      FAIL_REQUIRE("Must use one of the other ListSchema::of() overloads for complex types.");
       break;
 
     case schema::Type::Body::OBJECT_TYPE:
-      FAIL_PRECOND("List(Object) not supported.");
+      FAIL_REQUIRE("List(Object) not supported.");
       break;
   }
 
@@ -267,7 +267,7 @@ ListSchema ListSchema::of(schema::Type::Reader elementType, Schema context) {
       return of(of(body.getListType(), context));
 
     case schema::Type::Body::OBJECT_TYPE:
-      FAIL_PRECOND("List(Object) not supported.");
+      FAIL_REQUIRE("List(Object) not supported.");
       return ListSchema();
   }
 
@@ -276,31 +276,31 @@ ListSchema ListSchema::of(schema::Type::Reader elementType, Schema context) {
 }
 
 StructSchema ListSchema::getStructElementType() const {
-  PRECOND(nestingDepth == 0 && elementType == schema::Type::Body::STRUCT_TYPE,
+  REQUIRE(nestingDepth == 0 && elementType == schema::Type::Body::STRUCT_TYPE,
           "ListSchema::getStructElementType(): The elements are not structs.");
   return elementSchema.asStruct();
 }
 
 EnumSchema ListSchema::getEnumElementType() const {
-  PRECOND(nestingDepth == 0 && elementType == schema::Type::Body::ENUM_TYPE,
+  REQUIRE(nestingDepth == 0 && elementType == schema::Type::Body::ENUM_TYPE,
           "ListSchema::getEnumElementType(): The elements are not enums.");
   return elementSchema.asEnum();
 }
 
 InterfaceSchema ListSchema::getInterfaceElementType() const {
-  PRECOND(nestingDepth == 0 && elementType == schema::Type::Body::INTERFACE_TYPE,
+  REQUIRE(nestingDepth == 0 && elementType == schema::Type::Body::INTERFACE_TYPE,
           "ListSchema::getInterfaceElementType(): The elements are not interfaces.");
   return elementSchema.asInterface();
 }
 
 ListSchema ListSchema::getListElementType() const {
-  PRECOND(nestingDepth > 0,
+  REQUIRE(nestingDepth > 0,
           "ListSchema::getListElementType(): The elements are not lists.");
   return ListSchema(elementType, nestingDepth - 1, elementSchema);
 }
 
 void ListSchema::requireUsableAs(ListSchema expected) {
-  PRECOND(elementType == expected.elementType && nestingDepth == expected.nestingDepth,
+  REQUIRE(elementType == expected.elementType && nestingDepth == expected.nestingDepth,
           "This schema is not compatible with the requested native type.");
   elementSchema.requireUsableAs(expected.elementSchema.raw);
 }

c++/src/capnproto/serialize-packed.c++

@@ -39,8 +39,8 @@ size_t PackedInputStream::read(void* dst, size_t minBytes, size_t maxBytes) {
     return 0;
   }
 
-  DPRECOND(minBytes % sizeof(word) == 0, "PackedInputStream reads must be word-aligned.");
-  DPRECOND(maxBytes % sizeof(word) == 0, "PackedInputStream reads must be word-aligned.");
+  DREQUIRE(minBytes % sizeof(word) == 0, "PackedInputStream reads must be word-aligned.");
+  DREQUIRE(maxBytes % sizeof(word) == 0, "PackedInputStream reads must be word-aligned.");
 
   uint8_t* __restrict__ out = reinterpret_cast<uint8_t*>(dst);
   uint8_t* const outEnd = reinterpret_cast<uint8_t*>(dst) + maxBytes;
@@ -190,7 +190,7 @@ void PackedInputStream::skip(size_t bytes) {
     return;
   }
 
-  DPRECOND(bytes % sizeof(word) == 0, "PackedInputStream reads must be word-aligned.");
+  DREQUIRE(bytes % sizeof(word) == 0, "PackedInputStream reads must be word-aligned.");
 
   kj::ArrayPtr<const byte> buffer = inner.getReadBuffer();
   const uint8_t* __restrict__ in = reinterpret_cast<const uint8_t*>(buffer.begin());

c++/src/capnproto/serialize.c++

@@ -88,7 +88,7 @@ kj::ArrayPtr<const word> FlatArrayMessageReader::getSegment(uint id) {
 }
 
 kj::Array<word> messageToFlatArray(kj::ArrayPtr<const kj::ArrayPtr<const word>> segments) {
-  PRECOND(segments.size() > 0, "Tried to serialize uninitialized message.");
+  REQUIRE(segments.size() > 0, "Tried to serialize uninitialized message.");
 
   size_t totalSize = segments.size() / 2 + 1;
 
@@ -237,7 +237,7 @@ kj::ArrayPtr<const word> InputStreamMessageReader::getSegment(uint id) {
 // -------------------------------------------------------------------
 
 void writeMessage(kj::OutputStream& output, kj::ArrayPtr<const kj::ArrayPtr<const word>> segments) {
-  PRECOND(segments.size() > 0, "Tried to serialize uninitialized message.");
+  REQUIRE(segments.size() > 0, "Tried to serialize uninitialized message.");
 
   internal::WireValue<uint32_t> table[(segments.size() + 2) & ~size_t(1)];
 

c++/src/kj/array.h

@@ -94,7 +94,7 @@ public:
 
   inline size_t size() const { return size_; }
   inline T& operator[](size_t index) const {
-    KJ_INLINE_DPRECOND(index < size_, "Out-of-bounds Array access.");
+    KJ_IREQUIRE(index < size_, "Out-of-bounds Array access.");
     return ptr[index];
   }
 
@@ -108,11 +108,11 @@ public:
   inline T& back() { return *(ptr + size_ - 1); }
 
   inline ArrayPtr<T> slice(size_t start, size_t end) {
-    KJ_INLINE_DPRECOND(start <= end && end <= size_, "Out-of-bounds Array::slice().");
+    KJ_IREQUIRE(start <= end && end <= size_, "Out-of-bounds Array::slice().");
     return ArrayPtr<T>(ptr + start, end - start);
   }
   inline ArrayPtr<const T> slice(size_t start, size_t end) const {
-    KJ_INLINE_DPRECOND(start <= end && end <= size_, "Out-of-bounds Array::slice().");
+    KJ_IREQUIRE(start <= end && end <= size_, "Out-of-bounds Array::slice().");
     return ArrayPtr<const T>(ptr + start, end - start);
   }
 
@@ -235,7 +235,7 @@ public:
   inline size_t size() const { return pos - ptr; }
   inline size_t capacity() const { return endPtr - ptr; }
   inline T& operator[](size_t index) const {
-    KJ_INLINE_DPRECOND(index < pos - ptr, "Out-of-bounds Array access.");
+    KJ_IREQUIRE(index < pos - ptr, "Out-of-bounds Array access.");
     return ptr[index];
   }
 
@@ -266,7 +266,7 @@ public:
 
   template <typename... Params>
   void add(Params&&... params) {
-    KJ_INLINE_DPRECOND(pos < endPtr, "Added too many elements to ArrayBuilder.");
+    KJ_IREQUIRE(pos < endPtr, "Added too many elements to ArrayBuilder.");
     ctor(*pos, kj::fwd<Params>(params)...);
     ++pos;
   }
@@ -286,7 +286,7 @@ public:
     // arbitrary disposers with ArrayBuilder in the future, and anyway this check might catch bugs.
     // Probably we should just create a new Vector-like data structure if we want to allow building
     // of arrays without knowing the final size in advance.
-    KJ_INLINE_DPRECOND(pos == endPtr, "ArrayBuilder::finish() called prematurely.");
+    KJ_IREQUIRE(pos == endPtr, "ArrayBuilder::finish() called prematurely.");
     Array<T> result(reinterpret_cast<T*>(ptr), pos - ptr, internal::HeapArrayDisposer::instance);
     ptr = nullptr;
     pos = nullptr;

c++/src/kj/common.c++

@@ -27,7 +27,7 @@
 namespace kj {
 namespace internal {
 
-void inlinePreconditionFailure(const char* file, int line, const char* expectation,
+void inlineRequireFailure(const char* file, int line, const char* expectation,
                           const char* macroArgs, const char* message) {
   if (message == nullptr) {
     Log::fatalFault(file, line, Exception::Nature::PRECONDITION, expectation, macroArgs);

c++/src/kj/common.h

@@ -113,24 +113,22 @@ typedef unsigned char byte;
 
 namespace internal {
 
-void inlinePreconditionFailure(
+void inlineRequireFailure(
     const char* file, int line, const char* expectation, const char* macroArgs,
     const char* message = nullptr) KJ_NORETURN;
 
 }  // namespace internal
 
-#define KJ_INLINE_PRECOND(condition, ...) \
-    if (KJ_EXPECT_TRUE(condition)); else ::kj::internal::inlinePreconditionFailure( \
+#ifdef NDEBUG
+#define KJ_IREQUIRE(condition, ...)
+#else
+#define KJ_IREQUIRE(condition, ...) \
+    if (KJ_EXPECT_TRUE(condition)); else ::kj::internal::inlineRequireFailure( \
         __FILE__, __LINE__, #condition, #__VA_ARGS__, ##__VA_ARGS__)
-// Version of PRECOND() which is safe to use in headers that are #included by users.  Used to check
+// Version of REQUIRE() which is safe to use in headers that are #included by users.  Used to check
 // preconditions inside inline methods.  KJ_INLINE_DPRECOND is particularly useful in that
 // it will be enabled depending on whether the application is compiled in debug mode rather than
 // whether libkj is.
-
-#ifdef NDEBUG
-#define KJ_INLINE_DPRECOND(...)
-#else
-#define KJ_INLINE_DPRECOND KJ_INLINE_PRECOND
 #endif
 
 // #define KJ_STACK_ARRAY(type, name, size, minStack, maxStack)
@@ -501,7 +499,7 @@ public:
 
   inline size_t size() const { return size_; }
   inline T& operator[](size_t index) const {
-    KJ_INLINE_DPRECOND(index < size_, "Out-of-bounds ArrayPtr access.");
+    KJ_IREQUIRE(index < size_, "Out-of-bounds ArrayPtr access.");
     return ptr[index];
   }
 
@@ -511,7 +509,7 @@ public:
   inline T& back() const { return *(ptr + size_ - 1); }
 
   inline ArrayPtr slice(size_t start, size_t end) const {
-    KJ_INLINE_DPRECOND(start <= end && end <= size_, "Out-of-bounds ArrayPtr::slice().");
+    KJ_IREQUIRE(start <= end && end <= size_, "Out-of-bounds ArrayPtr::slice().");
     return ArrayPtr(ptr + start, end - start);
   }
 
@@ -578,8 +576,7 @@ To downcast(From* from) {
   }
 
 #if !KJ_NO_RTTI
-  KJ_INLINE_DPRECOND(
-      from == nullptr || dynamic_cast<To>(from) != nullptr,
+  KJ_IREQUIRE(from == nullptr || dynamic_cast<To>(from) != nullptr,
               "Value cannot be downcast() to requested type.");
 #endif
 

c++/src/kj/exception.c++

@@ -174,7 +174,7 @@ void ExceptionCallback::logMessage(StringPtr text) {
 }
 
 void ExceptionCallback::useProcessWide() {
-  RECOVERABLE_PRECOND(globalCallback == nullptr,
+  RECOVERABLE_REQUIRE(globalCallback == nullptr,
       "Can't register multiple global ExceptionCallbacks at once.") {
     return;
   }

c++/src/kj/io.c++

@@ -217,7 +217,7 @@ void ArrayOutputStream::write(const void* src, size_t size) {
     // Oh goody, the caller wrote directly into our buffer.
     fillPos += size;
   } else {
-    PRECOND(size <= (size_t)(array.end() - fillPos),
+    REQUIRE(size <= (size_t)(array.end() - fillPos),
             "ArrayOutputStream's backing array was not large enough for the data written.");
     memcpy(fillPos, src, size);
     fillPos += size;

c++/src/kj/logging-test.c++

@@ -123,7 +123,7 @@ TEST(Logging, Log) {
             "1 == 2; i = 123; hi; str = foo\n", mockCallback.text);
   mockCallback.text.clear();
 
-  EXPECT_THROW(PRECOND(1 == 2, i, "hi", str), MockException); line = __LINE__;
+  EXPECT_THROW(REQUIRE(1 == 2, i, "hi", str), MockException); line = __LINE__;
   EXPECT_EQ("fatal exception: " + fileLine(__FILE__, line) + ": precondition not met: expected "
             "1 == 2; i = 123; hi; str = foo\n", mockCallback.text);
   mockCallback.text.clear();

c++/src/kj/logging.h

@@ -43,7 +43,7 @@
 //   are disabled.  This macro should be used to check for bugs in the surrounding code and its
 //   dependencies, but NOT to check for invalid input.
 //
-// * `PRECOND(condition, ...)`:  Like `CHECK` but used to check preconditions -- i.e. to validate
+// * `REQUIRE(condition, ...)`:  Like `CHECK` but used to check preconditions -- e.g. to validate
 //   parameters passed from a caller.  A failure indicates that the caller is buggy.
 //
 // * `RECOVERABLE_CHECK(condition, ...) { ... }`:  Like `CHECK` except that if exceptions are
@@ -51,7 +51,7 @@
 //   do whatever it can to fill in dummy values so that the code can continue executing, even if
 //   this means the eventual output will be garbage.
 //
-// * `RECOVERABLE_PRECOND(condition, ...) { ... }`:  Like `RECOVERABLE_CHECK` and `PRECOND`.
+// * `RECOVERABLE_REQUIRE(condition, ...) { ... }`:  Like `RECOVERABLE_CHECK` and `REQUIRE`.
 //
 // * `VALIDATE_INPUT(condition, ...) { ... }`:  Like `RECOVERABLE_PRECOND` but used to validate
 //   input that may have come from the user or some other untrusted source.  Recoverability is
@@ -228,14 +228,14 @@ ArrayPtr<const char> KJ_STRINGIFY(Log::Severity severity);
 
 #define CHECK(...) FAULT(LOCAL_BUG, __VA_ARGS__)
 #define RECOVERABLE_CHECK(...) RECOVERABLE_FAULT(LOCAL_BUG, __VA_ARGS__)
-#define PRECOND(...) FAULT(PRECONDITION, __VA_ARGS__)
-#define RECOVERABLE_PRECOND(...) RECOVERABLE_FAULT(PRECONDITION, __VA_ARGS__)
+#define REQUIRE(...) FAULT(PRECONDITION, __VA_ARGS__)
+#define RECOVERABLE_REQUIRE(...) RECOVERABLE_FAULT(PRECONDITION, __VA_ARGS__)
 #define VALIDATE_INPUT(...) RECOVERABLE_FAULT(INPUT, __VA_ARGS__)
 
 #define FAIL_CHECK(...) CHECK(false, ##__VA_ARGS__)
 #define FAIL_RECOVERABLE_CHECK(...) RECOVERABLE_CHECK(false, ##__VA_ARGS__)
-#define FAIL_PRECOND(...) PRECOND(false, ##__VA_ARGS__)
-#define FAIL_RECOVERABLE_PRECOND(...) RECOVERABLE_PRECOND(false, ##__VA_ARGS__)
+#define FAIL_REQUIRE(...) REQUIRE(false, ##__VA_ARGS__)
+#define FAIL_RECOVERABLE_REQUIRE(...) RECOVERABLE_REQUIRE(false, ##__VA_ARGS__)
 #define FAIL_VALIDATE_INPUT(...) VALIDATE_INPUT(false, ##__VA_ARGS__)
 
 #define SYSCALL(call, ...) \
@@ -274,14 +274,14 @@ ArrayPtr<const char> KJ_STRINGIFY(Log::Severity severity);
 #define DLOG(...) do {} while (false)
 #define DCHECK(...) do {} while (false)
 #define RECOVERABLE_DCHECK(...) do {} while (false)
-#define DPRECOND(...) do {} while (false)
-#define RECOVERABLE_DPRECOND(...) do {} while (false)
+#define DREQUIRE(...) do {} while (false)
+#define RECOVERABLE_DREQUIRE(...) do {} while (false)
 #else
 #define DLOG LOG
 #define DCHECK CHECK
 #define RECOVERABLE_DCHECK RECOVERABLE_CHECK
-#define DPRECOND PRECOND
-#define RECOVERABLE_DPRECOND RECOVERABLE_PRECOND
+#define DREQUIRE REQUIRE
+#define RECOVERABLE_DREQUIRE RECOVERABLE_REQUIRE
 #endif
 
 template <typename... Params>

c++/src/kj/string.h

@@ -365,7 +365,7 @@ inline const char* String::end() const { return content == nullptr ? nullptr : c
 
 inline String::String(char* value, size_t size, const ArrayDisposer& disposer)
     : content(value, size + 1, disposer) {
-  KJ_INLINE_DPRECOND(value[size] == '\0', "String must be NUL-terminated.");
+  KJ_IREQUIRE(value[size] == '\0', "String must be NUL-terminated.");
 }
 
 inline String heapString(const char* value) {

compiler/src/c++-header.mustache

@@ -309,7 +309,7 @@ inline {{unionFullName}}::Which {{unionFullName}}::Builder::which() {
 {{#fieldIsPrimitive}}
 inline {{fieldType}} {{typeFullName}}::Reader::get{{fieldTitleCase}}() {
 {{#fieldUnion}}
-  KJ_INLINE_DPRECOND(which() == {{unionTitleCase}}::{{fieldUpperCase}},
+  KJ_IREQUIRE(which() == {{unionTitleCase}}::{{fieldUpperCase}},
               "Must check which() before get()ing a union member.");
 {{/fieldUnion}}
   return _reader.getDataField<{{fieldType}}>(
@@ -318,7 +318,7 @@ inline {{fieldType}} {{typeFullName}}::Reader::get{{fieldTitleCase}}() {
 
 inline {{fieldType}} {{typeFullName}}::Builder::get{{fieldTitleCase}}() {
 {{#fieldUnion}}
-  KJ_INLINE_DPRECOND(which() == {{unionTitleCase}}::{{fieldUpperCase}},
+  KJ_IREQUIRE(which() == {{unionTitleCase}}::{{fieldUpperCase}},
               "Must check which() before get()ing a union member.");
 {{/fieldUnion}}
   return _builder.getDataField<{{fieldType}}>(
@@ -346,7 +346,7 @@ inline bool {{typeFullName}}::Builder::has{{fieldTitleCase}}() {
 {{^fieldIsGenericObject}}
 inline {{fieldType}}::Reader {{typeFullName}}::Reader::get{{fieldTitleCase}}() {
 {{#fieldUnion}}
-  KJ_INLINE_DPRECOND(which() == {{unionTitleCase}}::{{fieldUpperCase}},
+  KJ_IREQUIRE(which() == {{unionTitleCase}}::{{fieldUpperCase}},
               "Must check which() before get()ing a union member.");
 {{/fieldUnion}}
   return ::capnproto::internal::PointerHelpers<{{fieldType}}>::get(
@@ -356,7 +356,7 @@ inline {{fieldType}}::Reader {{typeFullName}}::Reader::get{{fieldTitleCase}}() {
 
 inline {{fieldType}}::Builder {{typeFullName}}::Builder::get{{fieldTitleCase}}() {
 {{#fieldUnion}}
-  KJ_INLINE_DPRECOND(which() == {{unionTitleCase}}::{{fieldUpperCase}},
+  KJ_IREQUIRE(which() == {{unionTitleCase}}::{{fieldUpperCase}},
               "Must check which() before get()ing a union member.");
 {{/fieldUnion}}
   return ::capnproto::internal::PointerHelpers<{{fieldType}}>::get(
@@ -413,7 +413,7 @@ inline {{fieldType}}::Builder {{typeFullName}}::Builder::init{{fieldTitleCase}}(
 template <typename T>
 inline typename T::Reader {{typeFullName}}::Reader::get{{fieldTitleCase}}() {
 {{#fieldUnion}}
-  KJ_INLINE_DPRECOND(which() == {{unionTitleCase}}::{{fieldUpperCase}},
+  KJ_IREQUIRE(which() == {{unionTitleCase}}::{{fieldUpperCase}},
               "Must check which() before get()ing a union member.");
 {{/fieldUnion}}
   return ::capnproto::internal::PointerHelpers<T>::get(
@@ -423,7 +423,7 @@ inline typename T::Reader {{typeFullName}}::Reader::get{{fieldTitleCase}}() {
 template <typename T>
 inline typename T::Builder {{typeFullName}}::Builder::get{{fieldTitleCase}}() {
 {{#fieldUnion}}
-  KJ_INLINE_DPRECOND(which() == {{unionTitleCase}}::{{fieldUpperCase}},
+  KJ_IREQUIRE(which() == {{unionTitleCase}}::{{fieldUpperCase}},
               "Must check which() before get()ing a union member.");
 {{/fieldUnion}}
   return ::capnproto::internal::PointerHelpers<T>::get(
@@ -433,7 +433,7 @@ inline typename T::Builder {{typeFullName}}::Builder::get{{fieldTitleCase}}() {
 template <typename T, typename Param>
 inline typename T::Reader {{typeFullName}}::Reader::get{{fieldTitleCase}}(Param&& param) {
 {{#fieldUnion}}
-  KJ_INLINE_DPRECOND(which() == {{unionTitleCase}}::{{fieldUpperCase}},
+  KJ_IREQUIRE(which() == {{unionTitleCase}}::{{fieldUpperCase}},
               "Must check which() before get()ing a union member.");
 {{/fieldUnion}}
   return ::capnproto::internal::PointerHelpers<T>::getDynamic(
@@ -443,7 +443,7 @@ inline typename T::Reader {{typeFullName}}::Reader::get{{fieldTitleCase}}(Param&
 template <typename T, typename Param>
 inline typename T::Builder {{typeFullName}}::Builder::get{{fieldTitleCase}}(Param&& param) {
 {{#fieldUnion}}
-  KJ_INLINE_DPRECOND(which() == {{unionTitleCase}}::{{fieldUpperCase}},
+  KJ_IREQUIRE(which() == {{unionTitleCase}}::{{fieldUpperCase}},
               "Must check which() before get()ing a union member.");
 {{/fieldUnion}}
   return ::capnproto::internal::PointerHelpers<T>::getDynamic(