\input regression-test.tex
\documentclass{article}
\usepackage{osgstyler}

\DeclareOsgDecoration{marked-important}{
  line = {
    position = below,
    pattern = wavy,
    color = alert,
    thickness = {0.08em},
    offset = {0.12em}
  },
  background = {
    color = accent,
    opacity = {.25},
    shape = text
  },
  affix = {
    warning = {
      position = before,
      content = {!},
      color = alert,
      font = accent,
      gap = {.3em}
    }
  }
}

\DeclareOsgDecoration{boxed}{
  enclosure = {
    border-color = primary,
    fill-color = background,
    pattern = solid,
    thickness = thin,
    radius = {2pt},
    padding = normal
  },
  margin = {
    side = left,
    color = accent,
    pattern = solid,
    thickness = thick,
    offset = normal
  },
  affix = {
    endmark = {
      position = after,
      symbol = proof-end,
      color = text,
      gap = {.25em}
    }
  }
}

\DeclareOsgDecoration{redeclared}{
  line = {position = below, pattern = solid, color = primary}
}
\DeclareOsgDecoration{redeclared}{
  background = {color = accent, opacity = {.1}, shape = text}
}

\DeclareOsgDecoration{over-and-under}{
  line = {
    under = {
      position = below, pattern = solid, color = accent,
      thickness = thin, offset = {.12em}
    },
    over = {
      position = above, pattern = solid, color = accent,
      thickness = thin, offset = {.08em}
    }
  }
}

\begin{document}
\START
\TYPE{families=\OsgDecorationFamilies}
\TYPE{line-color=\OsgDecorationValue{marked-important}{line}{color}}
\TYPE{line-pattern=\OsgDecorationValue{marked-important}{line}{pattern}}
\TYPE{background-opacity=\OsgDecorationValue{marked-important}{background}{opacity}}
\TYPE{affix-position=\OsgDecorationInstanceValue{marked-important}{affix}{warning}{position}}
\TYPE{affix-content=\OsgDecorationInstanceValue{marked-important}{affix}{warning}{content}}
\TYPE{affix-font=\OsgDecorationInstanceValue{marked-important}{affix}{warning}{font}}
\TYPE{border=\OsgDecorationValue{boxed}{enclosure}{border-color}}
\TYPE{radius=\OsgDecorationValue{boxed}{enclosure}{radius}}
\TYPE{end-position=\OsgDecorationInstanceValue{boxed}{affix}{endmark}{position}}
\TYPE{end-symbol=\OsgDecorationInstanceValue{boxed}{affix}{endmark}{symbol}}
\TYPE{line-instances=\OsgDecorationInstances{over-and-under}{line}}
\TYPE{under-position=\OsgDecorationInstanceValue{over-and-under}{line}{under}{position}}
\TYPE{over-position=\OsgDecorationInstanceValue{over-and-under}{line}{over}{position}}
\OsgDecorationIfHasComponentTF{marked-important}{line}
  {\TYPE{has-line=yes}}{\TYPE{has-line=no}}
\OsgDecorationIfHasComponentTF{marked-important}{enclosure}
  {\TYPE{has-enclosure=yes}}{\TYPE{has-enclosure=no}}
\OsgDecorationIfHasComponentTF{redeclared}{line}
  {\TYPE{redeclared-line=yes}}{\TYPE{redeclared-line=no}}
\OsgDecorationIfHasComponentTF{redeclared}{background}
  {\TYPE{redeclared-background=yes}}{\TYPE{redeclared-background=no}}
\OsgDecorationIfHasInstanceTF{over-and-under}{line}{under}
  {\TYPE{has-under=yes}}{\TYPE{has-under=no}}
\END
\end{document}