From: Valentin Tolmer <nitnelave1@gmail.com>
Date: Tue, 29 Jan 2013 13:55:53 +0000 (+0100)
Subject: grammar: warn about unused precedence for symbols
X-Git-Tag: v2.7.90~128
X-Git-Url: https://git.saurik.com/bison.git/commitdiff_plain/284bc49c832ffe6280907cb6c7788fa06bc58c7c?hp=284bc49c832ffe6280907cb6c7788fa06bc58c7c

grammar: warn about unused precedence for symbols

Symbols with precedence but no associativity, and whose precedence is
never used, can be declared with %token instead.  The used precedence
relationships are recorded and a warning about useless ones is issued.

* src/conflicts.c (resolve_sr_conflict): Record precedence relation.
* src/symtab.c, src/symtab.h (prec_nodes, init_prec_nodes)
(symgraphlink_new, register_precedence_second_symbol)
(print_precedence_warnings): New.
Record relationships in a graph and warn about useless ones.
* src/main.c (main): Print precedence warnings.
* tests/conflicts.at: New.
---