dumpExpression.frink

View or download dumpExpression.frink in plain text format


/** This dumps an expression as a tree. */

/** This sets up the recursive call. */
dumpExpression[expr] :=
{
   return dumpExpression[expr, 0, ""]
}

dumpExpression[expr, indent, index] :=
{
   type = type[expr]
   result = repeat[" ", indent*3] + (index ? index + ": " : "")  + type[expr]
   if type == "String"
      result = result + ": " + inputForm[expr]   // Do substring?
   if type == "Unit"
      result = result + ": $expr"
   if type == "Symbol"
      result = result + ": " + inputForm[expr]
   
   result = result + "\n"
   
   children = getChildCount[expr]
   
   for i=0 to children-1
      result = result + dumpExpression[getChild[expr, i], indent+1, toString[i]]

   return result
}

/*
println[dumpExpression[parseToExpression["2x^2 + 5x + 3"]]]
println[]

println[dumpExpression[parseToExpression["{|a is isInteger, b is isInteger = 0 | a + b^2}"]]]

println[dumpExpression[getFunction["arctan", 2]]]

println[dumpExpression[parseToExpression["c^2"]]]

c = [1,2,3]
println[dumpExpression[c]]
*/



View or download dumpExpression.frink in plain text format


This is a program written in the programming language Frink.
For more information, view the Frink Documentation or see More Sample Frink Programs.

Alan Eliasen was born 18233 days, 19 hours, 12 minutes ago.