1 Parsetools Release Notes
This document describes the changes made to the Parsetools application.
1.1 Parsetools 1.4.1.1
1.1.1 Improvements and New Features
-
Minor Makefile changes.
Own Id: OTP-6689
1.2 Parsetools 1.4.1
1.2.1 Fixed Bugs and Malfunctions
-
A bug concerning precedence declarations of
non-terminals "one level up" has been fixed in yecc.
Own Id: OTP-6362
1.3 Parsetools 1.4
1.3.1 Improvements and Fixed Bugs
Several modifications of Yecc have been made:
-
The new functions
file/1,2
take the
role of the old functions yecc/2,3,4
. The
latter functions are no longer documented but are
kept for backward compatibility.
-
More checks of the grammar file have been
implemented. Examples are warnings for unused
non-terminals and duplicated declarations.
-
Invalid pseudo variables are no longer
replaced by
'$undefined'
but cause a failure.
-
Reserved words no longer need to be quoted
when used as terminals or non-terminals.
-
When compiling the generated parser file errors
and warnings concerning user code refer to
the grammar file, not the parser file.
-
Yecc emits a warning if there are conflicts
in the grammar. The new declaration
Expect
can
be used to suppress this warning.
-
The new operator precedence declaration
Nonassoc
can be used to declare operators with
no associativity.
-
Precedence can be given to more than one operator
with one single operator precedence declaration.
-
The function
parse_and_scan/1
in the
default includefile accepts {Function, A}
as well as {{M,F}, A} as tokenizer function.
Exceptions in the tokenizer are never caught.
-
The functions
yecc:file/1,2
can be accessed
from the Erlang shell via the new functions c:y/1,2
in STDLIB.
See yecc(3) for further details.
Own Id: OTP-5366
1.4 Parsetools 1.3.2
1.4.1 Fixed Bugs and Malfunctions
-
A bug in
Yecc
that was introduced in R9B has been
removed. Another bug concerning precedence declaration
"one level up" has been fixed.
Own Id: OTP-5461
1.5 Parsetools 1.3.1
1.5.1 Fixed Bugs and Malfunctions
-
A bug in the file
parsetools/include/yeccpre.hrl
caused yecc:parse_and_scan/1
to always report a
parse failure when the lexer reported end-of-file. This
problem has been fixed.
Own Id: OTP-5369
parsetools 1.4.1.1
Copyright © 1991-2007
Ericsson AB