Store token first column number on RNode

* node.c (A_NODE_HEADER): Print column number.
* node.h (nd_column, nd_set_column): Define getter/setter
  macros for column number of RNode.
* parse.y: Set first column number of tokens.

Notes:

* Use `@n` to get the location of token in parse.y.
* When we use `@n`, arguments of yyerror and yylex are
  changed.
* Initialize column of nodes with -1 to make it easy
  to detect nodes which we forget to set a column number.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60220 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

0 files changed, 0 insertions, 0 deletions