diff options
Diffstat (limited to 'tex/context/base/math-tag.lua')
| -rw-r--r-- | tex/context/base/math-tag.lua | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/tex/context/base/math-tag.lua b/tex/context/base/math-tag.lua index 6b555650e..26782bd9c 100644 --- a/tex/context/base/math-tag.lua +++ b/tex/context/base/math-tag.lua @@ -64,6 +64,8 @@ local glue_code = nodecodes.glue local kern_code = nodecodes.kern local math_code = nodecodes.math +local processnoads = noads.process + local a_tagged = attributes.private('tagged') local a_taggedpar = attributes.private('taggedpar') local a_exportstatus = attributes.private('exportstatus') @@ -144,6 +146,21 @@ local function getunicode(n) -- instead of getchar return data.unicode or char end +------------------- + +local content = { } +local found = false + +content[math_char_code] = function() found = true end + +local function hascontent(head) + found = false + processnoads(head,content,"content") + return found +end + +-------------------- + process = function(start) -- we cannot use the processor as we have no finalizers (yet) local mtexttag = nil while start do @@ -423,7 +440,7 @@ process = function(start) -- we cannot use the processor as we have no finalizer process(left) -- root symbol, ignored stop_tagged() end - if degree then -- not good enough, can be empty mlist + if degree and hascontent(degree) then setattr(start,a_tagged,start_tagged("mroot")) processsubsup(start) process(degree) |