As a follow-up to my answer of Hai-Peng's problem I wonder whether the
parser limitations of define-markup-command are documented somewhere,
this is, which exact combination of arguments are supported (in the
docs of 2.11.42 this is missing).
Looking into parser.yy, I see these combinations:
%token <scm> MARKUP_HEAD_EMPTY
%token <scm> MARKUP_HEAD_LIST0
%token <scm> MARKUP_HEAD_MARKUP0
%token <scm> MARKUP_HEAD_MARKUP0_MARKUP1
%token <scm> MARKUP_HEAD_SCM0
%token <scm> MARKUP_HEAD_SCM0_MARKUP1
%token <scm> MARKUP_HEAD_SCM0_SCM1
%token <scm> MARKUP_HEAD_SCM0_SCM1_MARKUP2
%token <scm> MARKUP_HEAD_SCM0_MARKUP1_MARKUP2
%token <scm> MARKUP_HEAD_SCM0_SCM1_SCM2
[So there's indeed no MARKUP_HEAD_SCM0_SCM1_SCM2_SCM3 as Hai-Peng
would have needed.]
It's a non-trivial issue for Joe User to find that, and the error
message is really cryptic if you don't know what a `signature' within
Scheme means.
Werner
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