public static string Generate(JsonLazyLoader lazyLoader)
{
return($@"
using System;
using System.Buffers;
using System.Text.Json;
namespace {lazyLoader.Namespace}
{{
{lazyLoader.Accesibility} readonly ref partial struct {lazyLoader.TypeName}
{{
private readonly Utf8JsonReader _jsonReader;
public readonly bool HasValue {{ get; }}
public {lazyLoader.TypeName}(ref Utf8JsonReader jsonReader)
{{
HasValue = true;
_jsonReader = jsonReader;
jsonReader.Skip();
}}
public {lazyLoader.LazyType.FullName} Load()
{{
var jsonReader = _jsonReader;
return {DeserializationGenerator.Generate("jsonReader", lazyLoader.LazyType)};
}}
}}
}}
");
}
private static string GenerateFieldDeserializer(JsonField field)
{
return($@"
if ({GenerateFieldNameCondition(field)})
{{
jsonReader.Read();
{field.Name} = {DeserializationGenerator.Generate("jsonReader", field.Type)};
}}");
}
public static string Generate(JsonDictionary dictionary)
{
return($@"
using System;
using System.Buffers;
using System.Text.Json;
namespace {dictionary.Namespace}
{{
{dictionary.Accesibility} readonly ref partial struct {dictionary.TypeName}
{{
private readonly Utf8JsonReader _jsonReader;
public readonly bool HasValue {{ get; }}
public {dictionary.TypeName}(ReadOnlySpan<byte> jsonData) : this(new Utf8JsonReader(jsonData, new JsonReaderOptions {{ CommentHandling = JsonCommentHandling.Skip }}))
{{}}
public {dictionary.TypeName}(ReadOnlySequence<byte> jsonData) : this(new Utf8JsonReader(jsonData, new JsonReaderOptions {{ CommentHandling = JsonCommentHandling.Skip }}))
{{}}
private {dictionary.TypeName}(Utf8JsonReader jsonReader) : this(ref jsonReader)
{{}}
public {dictionary.TypeName}(ref Utf8JsonReader jsonReader)
{{
if (jsonReader.TokenType != JsonTokenType.StartObject && jsonReader.TokenType != JsonTokenType.Null) jsonReader.Read();
switch (jsonReader.TokenType)
{{
case JsonTokenType.StartObject:
HasValue = true;
_jsonReader = jsonReader;
_jsonReader.Read();
jsonReader.Skip();
break;
case JsonTokenType.Null:
HasValue = false;
_jsonReader = default;
break;
default:
throw new JsonException($""Expected '{{{{', but got {{jsonReader.TokenType}}"");
}}
}}
public bool Any() => HasValue && _jsonReader.TokenType != JsonTokenType.EndObject;
public Enumerator GetEnumerator() => new Enumerator(_jsonReader);
public ref struct Enumerator
{{
private Utf8JsonReader _jsonReader;
public Enumerator(in Utf8JsonReader jsonReader)
{{
_jsonReader = jsonReader;
Current = default;
}}
public KeyValuePair Current {{ get; private set; }}
public bool MoveNext()
{{
if (_jsonReader.TokenType == JsonTokenType.EndObject || _jsonReader.TokenType == JsonTokenType.None) return false;
var key = {DeserializationGenerator.Generate("_jsonReader", dictionary.KeyType)};
_jsonReader.Read();
var value = {DeserializationGenerator.Generate("_jsonReader", dictionary.ValueType)};
_jsonReader.Read();
Current = new KeyValuePair(key, value);
return true;
}}
public readonly ref struct KeyValuePair
{{
public {dictionary.KeyType} Key {{ get; }}
public {dictionary.ValueType} Value {{ get; }}
public KeyValuePair({dictionary.KeyType} key, {dictionary.ValueType} value)
{{
Key = key;
Value = value;
}}
}}
}}
}}
}}
");
}
public static string Generate(JsonArray array)
{
return($@"
using System;
using System.Buffers;
using System.Text.Json;
namespace {array.Namespace}
{{
{array.Accesibility} readonly ref partial struct {array.TypeName}
{{
private readonly Utf8JsonReader _jsonReader;
public readonly bool HasValue {{ get; }}
public {array.TypeName}(ReadOnlySpan<byte> jsonData) : this(new Utf8JsonReader(jsonData, new JsonReaderOptions {{ CommentHandling = JsonCommentHandling.Skip }}))
{{}}
public {array.TypeName}(ReadOnlySequence<byte> jsonData) : this(new Utf8JsonReader(jsonData, new JsonReaderOptions {{ CommentHandling = JsonCommentHandling.Skip }}))
{{}}
private {array.TypeName}(Utf8JsonReader jsonReader) : this(ref jsonReader)
{{}}
public {array.TypeName}(ref Utf8JsonReader jsonReader)
{{
if (jsonReader.TokenType != JsonTokenType.StartArray && jsonReader.TokenType != JsonTokenType.Null) jsonReader.Read();
switch (jsonReader.TokenType)
{{
case JsonTokenType.StartArray:
HasValue = true;
_jsonReader = jsonReader;
_jsonReader.Read();
jsonReader.Skip();
break;
case JsonTokenType.Null:
HasValue = false;
_jsonReader = default;
break;
default:
throw new JsonException($""Expected '[', but got {{jsonReader.TokenType}}"");
}}
}}
public bool Any() => HasValue && _jsonReader.TokenType != JsonTokenType.EndArray;
public Enumerator GetEnumerator() => new Enumerator(_jsonReader);
public ref struct Enumerator
{{
private Utf8JsonReader _jsonReader;
public Enumerator(in Utf8JsonReader jsonReader)
{{
_jsonReader = jsonReader;
Current = default;
}}
public {array.ElementType} Current {{ get; private set; }}
public bool MoveNext()
{{
if (_jsonReader.TokenType == JsonTokenType.EndArray || _jsonReader.TokenType == JsonTokenType.None) return false;
Current = {DeserializationGenerator.Generate("_jsonReader", array.ElementType)};
_jsonReader.Read();
return true;
}}
}}
}}
}}
");
}
