/// <summary>
/// 初始化类<see cref="FileElement"/>。
/// </summary>
/// <param name="source">文件代码。</param>
public FileElement(string source)
{
using var reader = new SourceReader(source);
reader.EscapeWhiteSpace();
while (reader.CanRead)
{
switch (reader.Current)
{
case 'u': //using
{
var keyword = reader.ReadUntil();
if (keyword == "using")
{
AddElement(new UsingElement(reader.ReadUntil(';').Trim(), this));
reader.Offset();
break;
}
throw new Exception($"不支持：{keyword}关键词！");
}
case 'n': //namespace
{
var keyword = reader.ReadUntil();
if (keyword == "namespace")
{
var @namespace = new NamespaceElement(reader.ReadUntil('{').Trim(), this);
@namespace.Init(reader);
AddElement(@namespace);
break;
}
throw new Exception($"不支持：{keyword}关键词！");
}
case '/':
{
if (reader.IsNext("/*"))
{
AddElement(new CommentElement(reader.ReadUntil("*/"), this));
}
else if (reader.IsNext("//"))
{
AddElement(new CommentElement(reader.ReadLine()?.Trim() + "\r\n", this));
}
else
{
throw new Exception("非法字符串！");
}
}
break;
case '[':
AddElement(new AttributeElement(reader.ReadQuoteBlock('[', ']'), this));
break;
}
reader.EscapeWhiteSpace();
}
}
/// <summary>
/// 读取成员声明。
/// </summary>
/// <param name="reader">源代码读取器。</param>
/// <param name="ends">结束符列表。</param>
/// <returns>返回当前声明字符串。</returns>
public static string ReadDeclaration(this SourceReader reader, params char[] ends)
{
ends = ends.Concat(new[] { '<', ' ', '[' }).Distinct().ToArray();
var builder = new StringBuilder();
reader.EscapeWhiteSpace();
builder.Append(reader.ReadUntil(ends));
switch (reader.Current)
{
case ' ':
reader.EscapeWhiteSpace();
if (reader.IsNext('<')) //泛型类型List <string>
{
builder.Append(reader.ReadQuoteBlock('<', '>'));
}
else if (reader.IsNext('[')) //数组
{
builder.Append(reader.ReadChars(']', new[] { '[', ',', ' ' }));
}
break;
case '<': //泛型类型List<string>
builder.Append(reader.ReadQuoteBlock('<', '>'));
break;
case '[': //数组
builder.Append(reader.ReadChars(']', new[] { '[', ',', ' ' }));
break;
}
reader.EscapeWhiteSpace();
return(builder.ToString().Trim());
}
/// <summary>
/// 读取注释。
/// </summary>
/// <param name="reader">源代码读取器。</param>
protected void ReadComment(SourceReader reader)
{
if (reader.IsNext("/*"))
{
AddElement(new CommentElement(reader.ReadUntil("*/"), this));
}
else if (reader.IsNext("//"))
{
AddElement(new CommentElement(reader.ReadLine()?.Trim(), this));
}
else
{
throw new Exception("非法字符串！");
}
}
/// <summary>
/// 代码解析。
/// </summary>
/// <param name="reader">源码读取器。</param>
protected override void Initialized(SourceReader reader)
{
var name = reader.ReadUntil('=', ',');
if (reader.Current == '=')
{
reader.Offset();//移除'='
var value = reader.ReadQuoteUntil(',', '}').Trim();
if (reader.Current == '}')
{
AddElement(new EnumFieldElement(name, value, this));
return;
}
}
reader.Offset();//移除','
AddElement(new EnumFieldElement(name, null, this));
}
/// <summary>
/// 读取泛型约束。
/// </summary>
/// <param name="reader">当前读取器。</param>
/// <returns>返回泛型约束列表。</returns>
public static List <string> ReadRules(this SourceReader reader)
{
reader.EscapeWhiteSpace();
var rules = new List <string>();
while (reader.IsNext("where "))
{
var rule = reader.ReadUntil(':') + ":";
reader.Offset();
rule += reader.ReadQuoteUntil("where ", '{', '=').Trim();
while (reader.Current == '=' && !reader.IsNext("=>"))//lambda表达式
{
rule += reader.ReadQuoteUntil("where ", '{', '=').Trim();
}
rules.Add(rule);
}
return(rules);
}
private List <string> ReadDeclarations(SourceReader reader, out CodeType?type)
{
reader.EscapeWhiteSpace();
var declarations = new List <string>();
while (reader.CanRead)
{
var keyword = reader.ReadUntil();
switch (keyword)
{
case "class":
type = CodeType.Class;
return(declarations);
case "enum":
type = CodeType.Enum;
return(declarations);
case "interface":
type = CodeType.Interface;
return(declarations);
case "struct":
type = CodeType.Struct;
return(declarations);
default:
declarations.Add(keyword);
break;
}
reader.EscapeWhiteSpace();
}
type = null;
return(declarations);
}
/// <summary>
/// 读取当前代码块。
/// </summary>
/// <param name="reader">字符串读取实例。</param>
public override void Init(SourceReader reader)
{
reader.EscapeWhiteSpace();
var declarations = new List <string>();
string value = null;
while (reader.CanRead)
{
switch (reader.Current)
{
case ']':
reader.Offset(); //{}或者=>;
Rule = reader.ReadUntil('{', '=').Trim();
reader.Offset(); //移除{或者=
base.Init(reader);
return; //结束
case ',':
reader.Offset();
Parameters.Add(new ParameterElement(declarations, value, this));
declarations = new List <string>();
value = null;
break;
case '=':
reader.Offset();
value = reader.ReadQuoteUntil(']', ',');
break;
default:
declarations.Add(reader.ReadParameterDeclaration(']'));
break;
}
reader.EscapeWhiteSpace();
}
}