/// <summary>
/// Creates a template expression given a replacement token and parameters.
/// </summary>
/// <param name="replacementKeyToken">The token whose value should be 'template'</param>
/// <param name="parameters">There should be 2 parameters. One representing the name of the template to render and one representing the data to bind to the template.</param>
/// <param name="body">Should be empty. Template expressions do not support a body.</param>
/// <returns>a template expression</returns>
public IDocumentExpression CreateExpression(DocumentToken replacementKeyToken, List <DocumentToken> parameters, List <DocumentToken> body)
{
if (body.Count > 0)
{
throw new DocumentRenderException("template tags can't have a body", replacementKeyToken);
}
TokenReader <DocumentToken> reader = new TokenReader <DocumentToken>(parameters);
DocumentToken idToken;
if (reader.TryAdvance(out idToken, skipWhitespace: true) == false)
{
throw new DocumentRenderException("missing template Id", replacementKeyToken);
}
DocumentToken evalToken;
if (reader.TryAdvance(out evalToken, skipWhitespace: true) == false)
{
throw new DocumentRenderException("missing eval token", idToken);
}
var ret = new TemplateExpression(idToken, evalToken);
return(ret);
}
/// <summary>
/// Creates a template expression given a replacement token and parameters.
/// </summary>
/// <param name="context">Context about the expression being parsed</param>
/// <returns>a template expression</returns>
public IDocumentExpression CreateExpression(DocumentExpressionContext context)
{
if (context.Body.Count > 0)
{
throw new DocumentRenderException("template tags can't have a body", context.ReplacementKeyToken);
}
TokenReader<DocumentToken> reader = new TokenReader<DocumentToken>(context.Parameters);
DocumentToken idToken;
if (reader.TryAdvance(out idToken, skipWhitespace: true) == false)
{
throw new DocumentRenderException("missing template Id", context.ReplacementKeyToken);
}
DocumentToken evalToken;
if (reader.TryAdvance(out evalToken, skipWhitespace: true) == false)
{
throw new DocumentRenderException("missing eval token", idToken);
}
var ret = new TemplateExpression(idToken, evalToken);
return ret;
}