Dynamic macro invocation

[kampilan]

Model:

public class Model
{
    public string MacroName { get; set; }
}

var model = new Model {MacroName="foo"}
var context = new TemplateContext( model );

var template = paser.Parse(source)

template.Render(model)

Template:

{ % macro foo() %}
    Foo
{% endmacro %}

{ % macro bar() %}
    Bar
{% endmacro %}

{{ MacroName() }}

Is there any way to accomplish this? Short a giant If elsif else endif chain?

I am moving from StringTemplate and they had this capability.

Thanks so much
Jim

[hishamco]

I don't think there's something similar by default in The Shopify Liquid Spec, but you can create your custom tags & blocks https://github.com/sebastienros/fluid?tab=readme-ov-file#customizing-tags-and-blocks

[sebastienros]

This is possible already with two distinct components on your side:

1- Create a custom statement class that will invoke a macro
For instance a class named DynamicMacroStatement that will inherit from Statement and encapsulate this class https://github.com/sebastienros/fluid/blob/main/Fluid/Ast/MacroStatement.cs. Its constructor will also take the identifier, but it will use it to check if the current context has a variable name with the identifier value, and then execute a MacroStatement instance using the resolved property if it exists.

2- Then to use this new type of statement, you can use a visitor to replace any existing MacroStatement by the new wrapper you just created.

https://github.com/sebastienros/fluid?tab=readme-ov-file#visiting-and-altering-a-template

[kampilan]

Thank you!!!!