public Void Visit_FunctionStmt(FunctionStmt stmt)
{
LoxFunction function = new LoxFunction(stmt, _environment);
_environment.Define((string)stmt.name.value, function);
return(null);
}
public Void Visit_FunctionStmt(FunctionStmt stmt)
{
Declare(stmt.name);
Define(stmt.name);
ResolveFunction(stmt, FunctionType.Function);
return(null);
}
public object VisitFunctionStmt(FunctionStmt stmt)
{
var func = new LoxFunction(stmt, _scope, false);
_scope.Define(stmt.Name.Lexeme, func);
return(null);
}
public object VisitFunctionStmt(FunctionStmt stmt)
{
// Defining the name before resolving the function
// allows the function to refer to itself.
Declare(stmt.Name);
Define(stmt.Name);
ResolveFunction(stmt, FunctionType.FUNCTION);
return(null);
}
public string Visit_FunctionStmt(FunctionStmt stmt)
{
StringBuilder sb = new StringBuilder();
sb.Append("(FnDecl ");
sb.Append("'" + (string)stmt.name.value + "'");
sb.Append(' ');
foreach (var item in stmt.parameters)
{
sb.Append("'" + (string)item.value + "'");
sb.Append(' ');
}
sb.Append(Parenthesize("Body", stmt.body.ToArray()));
sb.Append(')');
return(sb.ToString());
}
private void ResolveFunction(FunctionStmt func, FunctionType type)
{
var enclosingFuncType = _currentFuncType;
_currentFuncType = type;
BeginScope();
foreach (var param in func.Parameters)
{
Declare(param);
Define(param);
}
Resolve(func.Body);
EndScope();
_currentFuncType = enclosingFuncType;
}
void ResolveFunction(FunctionStmt function, FunctionType functionType)
{
FunctionType enclosingFunctionType = _currentFunctionType;
_currentFunctionType = functionType;
BeginScope();
foreach (var param in function.parameters)
{
Declare(param);
Define(param);
}
Resolve(function.body);
EndScope();
_currentFunctionType = enclosingFunctionType;
}
public LoxFunction(FunctionStmt declaration, Environment closure, bool isInitializer = false)
{
_declaration = declaration;
_closure = closure;
_isInitializer = isInitializer;
}
public LoxFunction(FunctionStmt declaration, Scope closure, bool isInitializer)
{
_declaration = declaration;
_closure = closure;
_isInitializer = isInitializer;
}