Rick Hillegas created DERBY-6989:
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Summary: Upgrade javacc version
Key: DERBY-6989
URL: https://issues.apache.org/jira/browse/DERBY-6989
Project: Derby
Issue Type: Improvement
Components: Build tools
Affects Versions: 10.14.1.0, 10.15.0.0
Reporter: Rick Hillegas
Our javacc version is still 4.0 on the 10.15 trunk as well as on the 10.14 and
older branches. The following command demonstrates this:
{noformat}
> java -cp trunk/tools/java/javacc.jar javacc
Java Compiler Compiler Version 4.0 (Parser Generator)
Usage:
javacc option-settings inputfile
"option-settings" is a sequence of settings separated by spaces.
Each option setting must be of one of the following forms:
-optionname=value (e.g., -STATIC=false)
-optionname:value (e.g., -STATIC:false)
-optionname (equivalent to -optionname=true. e.g., -STATIC)
-NOoptionname (equivalent to -optionname=false. e.g., -NOSTATIC)
Option settings are not case-sensitive, so one can say "-nOsTaTiC" instead
of "-NOSTATIC". Option values must be appropriate for the corresponding
option, and must be either an integer, a boolean, or a string value.
The integer valued options are:
LOOKAHEAD (default 1)
CHOICE_AMBIGUITY_CHECK (default 2)
OTHER_AMBIGUITY_CHECK (default 1)
The boolean valued options are:
STATIC (default true)
DEBUG_PARSER (default false)
DEBUG_LOOKAHEAD (default false)
DEBUG_TOKEN_MANAGER (default false)
OPTIMIZE_TOKEN_MANAGER (default true)
ERROR_REPORTING (default true)
JAVA_UNICODE_ESCAPE (default false)
UNICODE_INPUT (default false)
IGNORE_CASE (default false)
COMMON_TOKEN_ACTION (default false)
USER_TOKEN_MANAGER (default false)
USER_CHAR_STREAM (default false)
BUILD_PARSER (default true)
BUILD_TOKEN_MANAGER (default true)
TOKEN_MANAGER_USES_PARSER (default false)
SANITY_CHECK (default true)
FORCE_LA_CHECK (default false)
CACHE_TOKENS (default false)
KEEP_LINE_COLUMN (default true)
The string valued options are:
OUTPUT_DIRECTORY (default Current Directory)
JDK_VERSION (default 1.4)
EXAMPLE:
javacc -STATIC=false -LOOKAHEAD:2 -debug_parser mygrammar.jj
{noformat}
This version of javacc is so old that its default JDK version is 1.4.
DERBY-5215 describes some of the issues involved in upgrading javacc. I seem to
recall that later versions of javacc produced worse error messages when users
tried to compile illegal SQL statements. That might still be a showstopper.
However, relying on a stale, unsupported tool seems like a bad long-term
strategy.
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