Hi, John, thanks for your help.  Hope I could solve it today.
Anyway, I think that Ocaml should support infix as SML.

Dengping


On 28 May 2002, John Prevost wrote:

>>>>>> "zd" == dengping zhu <zhudp@cs.bu.edu> writes:
>
>    zd> I want to convert these code into ocaml. How can find so many
>    zd> different 'first characters'? Because the available characters
>    zd> in ocaml are:
>
>    zd> **...  right *... /... %...  left +... -...  left @... ^...
>    zd> right
>
>    zd> Do you have any sugestion?
>
>Take a look at section 6.7 of the manual for precedence rules, and
>section 6.1 (under the heading "Prefix and infix symbols") for the
>list of symbols.  In short, this is the list of all the available
>infix symbols, in order of precedence:
>
>!... ?... ~...                          prefix
>**...                                   right
>*... /... %...                          left
>+... -...                               left
>@... ^...                               right
>=... <... >... |... &... $... %...      left
>
>This means that you might have some trouble with your infix levels,
>but there are normally ways to organize things for what you'd like.  I
>find, also, that having just a few levels and using parenthesis for
>the rest of the time can work quite well.  As you note, using this
>style for everything can be painful, but having infixes for only a few
>specific things can help immensely.
>
>John.
>
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