Parser – Table Entry Pointers

Before the code enumeration (and token type enumeration) can be replaced with the new code type enumeration, uses of the code enumeration type need to be replaced with the use of table entry pointers.  This will be done on different parts at a time adding table entry class access functions as needed.

This process was started by changing the table find functions from returning a code enumerator to a table entry pointer (returning a null pointer to indicate no table entry was found).  Only the parser routines were using the find functions, so the get identifier and get operator functions were updated to use table entry pointers instead of a code enumerator.

A few table entry access functions were added to support the parser changes including the code, is code, name, has flag and alternate functions.  For now the code function simply returns an index value of the entry by subtracting the base of the table entries array.  This function is temporary.  The is code function checks if the table entry is for a particular code.  For now it compares to the code function return value, but eventually will compare to the code member that  will be added to the table entry.  The alternate function is similar to the alternate code function but returns a table entry pointer.

The code argument of the two token constructors for codes were changed to table entry pointers.  For now they just access the code function of the table entry.  The immediate goal is to change the interfaces and later to change the underlying code when the token code member is replaced with a table entry pointer.  The token constructor taking a code was temporarily left (though the unneeded arguments were removed) for use by the translator routines.

The table entry class was made a friend class of the table class (specifically so the alternate member function can access the static alternate member of the table class).  Eventually, the table entry and table classes will be combined into a single class.

[branch table commit 78f0b39780]