rational mathval

src/math.jl

@@ -57,6 +57,8 @@ function parse_math(ast::VPtr)::Math
         return MathConst(get_string(ast, :ASTNode_getName))
     elseif ast_is(ast, :ASTNode_isInteger)
         return MathVal(ccall(sbml(:ASTNode_getInteger), Cint, (VPtr,), ast))
+    elseif ast_is(ast, :ASTNode_isRational)
+        return MathVal(ccall(sbml(:ASTNode_getNumerator), Cint, (VPtr,), ast)//ccall(sbml(:ASTNode_getDenominator), Cint, (VPtr,), ast))
     elseif ast_is(ast, :ASTNode_isReal)
         return MathVal(ccall(sbml(:ASTNode_getReal), Cdouble, (VPtr,), ast))
     elseif ast_is(ast, :ASTNode_isFunction)