recursive call of the templates a parameter being passed through, suddenly changes its value between the calls.

[antlr]

recursive call of the templates a parameter being passed through, suddenly changes its value between the calls.

[parrt]

Find STRecursionBug.zip in attachments.

[sharwell]

You are invoking templates with unbound anonymous templates as arguments, with the syntax {...}.

std_field_dropdown(dropdown_field,depends_from) ::= <<
<std_field(dropdown_field,{<std_field_id(dropdown_field.name,[])>},depends_from)>
>>

std_field_selection(selection_field,sel_bt,depends_from) ::= <<
<std_field(selection_field,{<std_field_id(selection_field.name,sel_bt.value)>},depends_from)>
>>

std_field_text(text_field,depend_on) ::= <<
<std_field(text_field,{<std_field_id(text_field.name,[])>},depend_on)>
>>

std_field_textarea(txtarea_field,depends) ::= <<
<std_field(txtarea_field,{<std_field_id(txtarea_field.name,[])>},depends)>
>>

These templates are bound at the time they are rendered, which is a different context from where they are created. What you want to do is force these anonymous templates to bind and render in the current context and pass the evaluated result as the argument, with the syntax ({...}).

std_field_dropdown(dropdown_field,depends_from) ::= <<
<std_field(dropdown_field,({<std_field_id(dropdown_field.name,[])>}),depends_from)>
>>

std_field_selection(selection_field,sel_bt,depends_from) ::= <<
<std_field(selection_field,({<std_field_id(selection_field.name,sel_bt.value)>}),depends_from)>
>>

std_field_text(text_field,depend_on) ::= <<
<std_field(text_field,({<std_field_id(text_field.name,[])>}),depend_on)>
>>

std_field_textarea(txtarea_field,depends) ::= <<
<std_field(txtarea_field,({<std_field_id(txtarea_field.name,[])>}),depends)>
>>

[parrt]

just to be clear

std_field_dropdown(dropdown_field,depends_from) ::= <<
<std_field(dropdown_field,{<std_field_id(dropdown_field.name,[])>},depends_from)>
>>

passes an anonymous template, referencing argument dropdown_field, to another template whose context does not have dropdown_field. ST does dynamic lookup of attributes and does not bind them like closures would in a programming language.