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[Swift] Optional Scalars Preparation (#6028)

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* Perpares swift to take optional scalars + adds optional string helper method + disables linters in generated code

* Small fix for generated code

* Update grpc support to alpha 17 for swift
This commit is contained in:
mustiikhalil
2020-07-20 20:38:50 +03:00
committed by GitHub
parent 2e48c8dd31
commit ff1b73128d
12 changed files with 75 additions and 26 deletions
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8
grpc/src/compiler/swift_generator.cc
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@@ -164,7 +164,7 @@ grpc::string GenerateServerExtensionBody(const grpc_generator::Method *method) {
grpc::string start = "\t\tcase \"$MethodName$\":\n\t\t";
if (method->NoStreaming()) {
return start +
"return UnaryCallHandler(callHandlerContext: callHandlerContext) { "
"return CallHandlerFactory.makeUnary(callHandlerContext: callHandlerContext) { "
"context in"
"\n\t\t\t"
"return { request in"
@@ -175,7 +175,7 @@ grpc::string GenerateServerExtensionBody(const grpc_generator::Method *method) {
}
if (method->ClientStreaming()) {
return start +
"return ClientStreamingCallHandler(callHandlerContext: "
"return CallHandlerFactory.makeClientStreaming(callHandlerContext: "
"callHandlerContext) { context in"
"\n\t\t\t"
"self.$MethodName$(context: context)"
@@ -183,7 +183,7 @@ grpc::string GenerateServerExtensionBody(const grpc_generator::Method *method) {
}
if (method->ServerStreaming()) {
return start +
"return ServerStreamingCallHandler(callHandlerContext: "
"return CallHandlerFactory.makeServerStreaming(callHandlerContext: "
"callHandlerContext) { context in"
"\n\t\t\t"
"return { request in"
@@ -194,7 +194,7 @@ grpc::string GenerateServerExtensionBody(const grpc_generator::Method *method) {
}
if (method->BidiStreaming()) {
return start +
"return BidirectionalStreamingCallHandler(callHandlerContext: "
"return CallHandlerFactory.makeBidirectionalStreaming(callHandlerContext: "
"callHandlerContext) { context in"
"\n\t\t\t"
"self.$MethodName$(context: context)"

34
src/idl_gen_swift.cpp
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@@ -142,7 +142,8 @@ class SwiftGenerator : public BaseGenerator {
code_.Clear();
code_.SetValue("ACCESS", "_accessor");
code_.SetValue("TABLEOFFSET", "VTOFFSET");
code_ += "// " + std::string(FlatBuffersGeneratedWarning()) + "\n";
code_ += "// " + std::string(FlatBuffersGeneratedWarning());
code_ += "// swiftlint:disable all\n";
code_ += "import FlatBuffers\n";
// Generate code for all the enum declarations.
@@ -509,8 +510,8 @@ class SwiftGenerator : public BaseGenerator {
auto default_value = IsEnum(field.value.type) ? GenEnumDefaultValue(field)
: field.value.constant;
auto is_enum = IsEnum(field.value.type) ? ".rawValue" : "";
code_ += "{{VALUETYPE}}" + builder_string + "fbb.add(element: {{VALUENAME}}" +
is_enum +
code_ += "{{VALUETYPE}}" + builder_string +
"fbb.add(element: {{VALUENAME}}" + is_enum +
", def: {{CONSTANT}}, at: {{TABLEOFFSET}}.{{OFFSET}}.p) }";
create_func_header.push_back("" + name + ": " + type + " = " +
default_value);
@@ -530,13 +531,17 @@ class SwiftGenerator : public BaseGenerator {
}
if (IsStruct(field.value.type)) {
auto struct_type = "UnsafeMutableRawPointer?";
auto camel_case_name = "structOf" + MakeCamel(name, true);
create_func_header.push_back(camel_case_name + " " + name + ": " + struct_type + " = nil");
auto create_struct = "guard let {{VALUENAME}} = {{VALUENAME}} else { return }; fbb.create(struct: {{VALUENAME}}, type: {{VALUETYPE}}.self); ";
auto reader_type = "fbb.add(structOffset: {{TABLEOFFSET}}.{{OFFSET}}.p) }";
code_ += struct_type + builder_string + create_struct + reader_type;
return;
auto struct_type = "UnsafeMutableRawPointer?";
auto camel_case_name = "structOf" + MakeCamel(name, true);
create_func_header.push_back(camel_case_name + " " + name + ": " +
struct_type + " = nil");
auto create_struct =
"guard let {{VALUENAME}} = {{VALUENAME}} else { return }; "
"fbb.create(struct: {{VALUENAME}}, type: {{VALUETYPE}}.self); ";
auto reader_type =
"fbb.add(structOffset: {{TABLEOFFSET}}.{{OFFSET}}.p) }";
code_ += struct_type + builder_string + create_struct + reader_type;
return;
}
auto offset_type = field.value.type.base_type == BASE_TYPE_STRING
@@ -879,11 +884,14 @@ class SwiftGenerator : public BaseGenerator {
case BASE_TYPE_STRUCT: {
if (field.value.type.struct_def &&
field.value.type.struct_def->fixed) {
// This is a Struct (IsStruct), not a table. We create UnsafeMutableRawPointer in this case.
// This is a Struct (IsStruct), not a table. We create
// UnsafeMutableRawPointer in this case.
std::string code;
GenerateStructArgs(*field.value.type.struct_def, &code, "", "", "$0", true);
GenerateStructArgs(*field.value.type.struct_def, &code, "", "",
"$0", true);
code = code.substr(0, code.size() - 2);
code_ += "let __" + name + " = obj." + name + ".map { create" + field.value.type.struct_def->name + "(" + code + ") }";
code_ += "let __" + name + " = obj." + name + ".map { create" +
field.value.type.struct_def->name + "(" + code + ") }";
} else {
code_ += "let __" + name + " = " + type +
".pack(&builder, obj: &obj." + name + ")";

2
swift/FlatBuffers.podspec
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@@ -1,6 +1,6 @@
Pod::Spec.new do |s|
s.name = 'FlatBuffers'
s.version = '0.6.0'
s.version = '0.7.0'
s.summary = 'FlatBuffers: Memory Efficient Serialization Library'
s.description = "FlatBuffers is a cross platform serialization library architected for

17
swift/Sources/FlatBuffers/FlatBufferBuilder.swift
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@@ -395,6 +395,14 @@ public struct FlatBufferBuilder {
return Offset(offset: _bb.size)
}
/// Insets a string into the buffer using UTF8
/// - Parameter str: String to be serialized
/// - returns: The strings offset in the buffer
mutating public func create(string str: String?) -> Offset<String> {
guard let str = str else { return Offset() }
return create(string: str)
}
/// Inserts a shared string to the buffer
///
/// The function checks the stringOffsetmap if it's seen a similar string before
@@ -441,6 +449,15 @@ public struct FlatBufferBuilder {
track(offset: push(element: element), at: position)
}
/// Adds a value into the buffer of type optional Scalar
/// - Parameters:
/// - element: Optional element of type scalar
/// - position: The predefined position of the element
mutating public func add<T: Scalar>(element: T?, at position: VOffset) {
guard let element = element else { return }
track(offset: push(element: element), at: position)
}
/// Pushes the values into the buffer
/// - Parameter element: Element to insert
/// - returns: Postion of the Element

2
tests/FlatBuffers.GRPC.Swift/Package.swift
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@@ -12,7 +12,7 @@ let package = Package(
dependencies: [
// Main SwiftNIO package
.package(path: "../../swift"),
.package(url: "https://github.com/grpc/grpc-swift.git", from: "1.0.0-alpha.9")
.package(url: "https://github.com/grpc/grpc-swift.git", from: "1.0.0-alpha.17")
],
targets: [
// Targets are the basic building blocks of a package. A target can define a module or a test suite.

4
tests/FlatBuffers.GRPC.Swift/Sources/Model/greeter.grpc.swift
View File

@@ -53,13 +53,13 @@ public extension GreeterProvider {
func handleMethod(_ methodName: String, callHandlerContext: CallHandlerContext) -> GRPCCallHandler? {
switch methodName {
case "SayHello":
return UnaryCallHandler(callHandlerContext: callHandlerContext) { context in
return CallHandlerFactory.makeUnary(callHandlerContext: callHandlerContext) { context in
return { request in
self.SayHello(request, context: context)
}
}
case "SayManyHellos":
return ServerStreamingCallHandler(callHandlerContext: callHandlerContext) { context in
return CallHandlerFactory.makeServerStreaming(callHandlerContext: callHandlerContext) { context in
return { request in
self.SayManyHellos(request: request, context: context)
}

1
tests/FlatBuffers.GRPC.Swift/Sources/Model/greeter_generated.swift
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@@ -1,4 +1,5 @@
// automatically generated by the FlatBuffers compiler, do not modify
// swiftlint:disable all
import FlatBuffers

2
tests/FlatBuffers.Test.Swift/Package.swift
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@@ -11,7 +11,7 @@ let package = Package(
],
dependencies: [
.package(path: "../../swift/"),
.package(url: "https://github.com/grpc/grpc-swift.git", from: "1.0.0-alpha.12")
.package(url: "https://github.com/grpc/grpc-swift.git", from: "1.0.0-alpha.17")
],
targets: [
.target(name: "SwiftFlatBuffers"),

21
tests/FlatBuffers.Test.Swift/Tests/FlatBuffers.Test.SwiftTests/FlatBuffersTests.swift
View File

@@ -59,6 +59,27 @@ final class FlatBuffersTests: XCTestCase {
XCTAssertEqual(c.nameVector, [78, 111, 114, 119, 97, 121])
XCTAssertEqual(c.name, country)
}
func testWriteOptionalValues() {
var b = FlatBufferBuilder()
let offset = b.create(string: nil)
createOptionalTable(b: &b, v: nil, off: offset)
let unitArray = b.sizedByteArray
// TODO: - Test function should be adjusted when the generation of optional scalars code is complete
let bb = ByteBuffer(bytes: unitArray)
let table = Table(bb: bb, position: Int32(bb.read(def: UOffset.self, position: bb.reader)) + Int32(bb.reader))
XCTAssertEqual(unitArray, [8, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, 0])
XCTAssertEqual(table.offset(4) == 0, true)
XCTAssertEqual(table.offset(6) == 0, true)
}
func createOptionalTable(b: inout FlatBufferBuilder, v: Int?, off: Offset<String>) {
let start = b.startTable(with: 2)
b.add(offset: off, at: 6)
b.add(element: v, at: 4)
let root = Offset<UOffset>(offset: b.endTable(at: start))
b.finish(offset: root)
}
}
class Country {

8
tests/FlatBuffers.Test.Swift/Tests/FlatBuffers.Test.SwiftTests/monster_test.grpc.swift
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@@ -65,23 +65,23 @@ public extension MonsterStorageProvider {
func handleMethod(_ methodName: String, callHandlerContext: CallHandlerContext) -> GRPCCallHandler? {
switch methodName {
case "Store":
return UnaryCallHandler(callHandlerContext: callHandlerContext) { context in
return CallHandlerFactory.makeUnary(callHandlerContext: callHandlerContext) { context in
return { request in
self.Store(request, context: context)
}
}
case "Retrieve":
return ServerStreamingCallHandler(callHandlerContext: callHandlerContext) { context in
return CallHandlerFactory.makeServerStreaming(callHandlerContext: callHandlerContext) { context in
return { request in
self.Retrieve(request: request, context: context)
}
}
case "GetMaxHitPoint":
return ClientStreamingCallHandler(callHandlerContext: callHandlerContext) { context in
return CallHandlerFactory.makeClientStreaming(callHandlerContext: callHandlerContext) { context in
self.GetMaxHitPoint(context: context)
}
case "GetMinMaxHitPoints":
return BidirectionalStreamingCallHandler(callHandlerContext: callHandlerContext) { context in
return CallHandlerFactory.makeBidirectionalStreaming(callHandlerContext: callHandlerContext) { context in
self.GetMinMaxHitPoints(context: context)
}
default: return nil;

1
tests/FlatBuffers.Test.Swift/Tests/FlatBuffers.Test.SwiftTests/monster_test_generated.swift
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@@ -1,4 +1,5 @@
// automatically generated by the FlatBuffers compiler, do not modify
// swiftlint:disable all
import FlatBuffers

1
tests/FlatBuffers.Test.Swift/Tests/FlatBuffers.Test.SwiftTests/union_vector_generated.swift
View File

@@ -1,4 +1,5 @@
// automatically generated by the FlatBuffers compiler, do not modify
// swiftlint:disable all
import FlatBuffers