Example:

[[Template:A]]

{{eacharg|value=val|#{{{val}}}#}}

[[Template:B]]

{{eachkwarg|prefix={{{1}}}|key={{{k}}}|value={{{v}}}|({{{k}}},{{{v}}})}}

Page:
{{A|a|b|c|d}}

{{B|X|Xa=1|Xb=2|Yc=3}}

Render as:
#abc##d#
(a,1)(b,2)

Version: unspecified
Severity: enhancement