-/* The parser tables consist of these tables.
- Starred ones needed only for the semantic parser.
- Double starred are output only if switches are set.
-
- yytranslate = vector mapping yylex's token numbers into bison's token
- numbers.
-
- ** yytname = vector of string-names indexed by bison token number
-
- ** yytoknum = vector of yylex token numbers corresponding to entries
- in yytname
-
- yyrline = vector of line-numbers of all rules. For yydebug printouts.
-
- yyrhs = vector of items of all rules.
- This is exactly what ritems contains. For yydebug and for semantic
- parser.
-
- yyprhs[r] = index in yyrhs of first item for rule r.
-
- yyr1[r] = symbol number of symbol that rule r derives.
-
- yyr2[r] = number of symbols composing right hand side of rule r.
-
- * yystos[s] = the symbol number of the symbol that leads to state s.
-
- yydefact[s] = default rule to reduce with in state s,
- when yytable doesn't specify something else to do.
- Zero means the default is an error.
-
- yydefgoto[i] = default state to go to after a reduction of a rule that
- generates variable ntokens + i, except when yytable
- specifies something else to do.
-
- yypact[s] = index in yytable of the portion describing state s.
- The lookahead token's type is used to index that portion
- to find out what to do.
-
- If the value in yytable is positive,
- we shift the token and go to that state.
-
- If the value is negative, it is minus a rule number to reduce by.
-
- If the value is zero, the default action from yydefact[s] is used.
-
- yypgoto[i] = the index in yytable of the portion describing
- what to do after reducing a rule that derives variable i + ntokens.
- This portion is indexed by the parser state number, s,
- as of before the text for this nonterminal was read.
- The value from yytable is the state to go to if
- the corresponding value in yycheck is s.
-
- yytable = a vector filled with portions for different uses,
- found via yypact and yypgoto.
-
- yycheck = a vector indexed in parallel with yytable.
- It indicates, in a roundabout way, the bounds of the
- portion you are trying to examine.
-
- Suppose that the portion of yytable starts at index p
- and the index to be examined within the portion is i.
- Then if yycheck[p+i] != i, i is outside the bounds
- of what is actually allocated, and the default
- (from yydefact or yydefgoto) should be used.
- Otherwise, yytable[p+i] should be used.