// [1] Program = {Declaration | FunctionDefinition}.
private bool IsProgram(out Program program)
{
program = new Program();
while (!(token.Kind == SyntaxKind.EndOfFileToken))
{
if (ParseDeclaration(out var declaration))
{
program.AddChild(declaration);
}
else if (ParseFunctionDefinition(out var functionDefinition))
{
program.AddChild(functionDefinition);
}
else
{
break;
}
}
return(diag.GetErrorCount() == 0);
}
