String dumpFER() {
String forprint = "";
forprint += "(<" + symtab.printBindings() + ">, " + name + ", ";
if (startLine == 0) {
forprint += "-, ";
} else {
forprint += startLine + ", ";
}
if (endLine == 0) {
forprint += "-, ";
} else {
forprint += endLine + ", ";
}
if (currentLine == 0) {
forprint += "-)";
} else {
forprint += currentLine + ")";
}
return forprint;
}
public FunctionEnvironmentRecord() {
symtab = new SymbolTable();
symtab.beginScope();
}
/** @return a string of id's in the Symbol Table. */
public Set<String> getVars() {
return symtab.keys();
}
/**
* Removes the last n id/offset pairs from the Symbol Table.
*
* @param n - the number of pairs to remove from the Symbol Table
*/
public void popPairs(int n) {
symtab.endScope(n);
}
/**
* Enters an id/offset pair into the Symbol Table.
*
* @param var - the id
* @param offset - the offset of the variable in the stack
*/
public void enterPair(String var, int offset) {
symtab.put(var, offset);
}