public static Block Parse(String body)
{
var block = new Block();
var lexer = new Lexer(body);
while (lexer.HasNext())
{
// Conditional
if (lexer.PeekToken() == "if")
{
lexer.SkipToken(); // Absorb if
Expression condition = new Expression(lexer.ReadBlock("(", ")"));
Block b = Block.Parse(lexer.ReadBlock("{", "}"));
IfStatement statement = new IfStatement(condition, b);
block.Statements.Add(statement);
}
else if(lexer.PeekToken(2) == "=")
{
var type = lexer.ReadToken();
var name = lexer.ReadToken();
lexer.SkipToken();
var value = lexer.ReadUntil(";");
var variableDefinition = new VariableDefinition(name, type, value);
block.Statements.Add(variableDefinition);
}
else
{
string str = lexer.ReadUntil(";");
block.Statements.Add( Expression.Parse(str) );
lexer.SkipToken(); // Skip ;
}
}
return block;
}
private void ParseClassBody(String body)
{
Lexer lexer = new Lexer(body);
while (lexer.HasNext())
{
if (lexer.PeekToken(2) == ";") // Member definition without initial value
{
var member = CreateMember(lexer.ReadToken(), lexer.ReadToken());
lexer.SkipToken(); // ;
Members.Add(member);
}
if (lexer.PeekToken(2) == "=") // Member definition with initial value
{
var member = CreateMember(lexer.ReadToken(), lexer.ReadToken(), lexer.ReadBlock("=", ";"));
Members.Add(member);
}
if (lexer.PeekToken(2) == "(") // Function definition
{
Function function = Function.Parse(
lexer.ReadToken(), // return type
lexer.ReadToken(), // name
lexer.ReadBlock("(", ")"), // arguments
lexer.ReadBlock("{", "}")); // body
Functions.Add(function);
}
}
}
public void ParseArguments(String arguments)
{
if (arguments.Trim() == String.Empty)
return;
Lexer lexer = new Lexer(arguments);
while(lexer.HasNext(3))
{
Arguments.Add(new FunctionParameter( lexer.ReadToken(), lexer.ReadToken() ));
lexer.SkipToken();
}
Arguments.Add(new FunctionParameter(lexer.ReadToken(), lexer.ReadToken()));
}
public void FindAllTypes()
{
Lexer typeLexer = new Lexer(File.ReadAllText(ProjectRoot + @"\TypeDefinitions.dsl"));
while (typeLexer.HasNext())
{
typeLexer.SkipToken(); // extern
String metaType = typeLexer.ReadToken();
String name = typeLexer.ReadToken();
String defaultValue = "nullptr";
if (metaType == "struct")
{
typeLexer.SkipToken(); // =
defaultValue = typeLexer.ReadToken();
if (defaultValue == "default")
defaultValue = name + "()";
}
typeLexer.SkipToken(); // ;
Type type = new Type(name, defaultValue, (metaType == "struct") ? MetaType.ValueType : MetaType.ReferenceType, DeclarationType.Extern);
ExternTypes.Add(type);
}
}