[gentoo-commits] proj/libbash:master commit in: bashast/, bashast/gunit/

["Petteri Räty" <betelgeuse@gentoo.org>]

commit:     1d8b7e32a092a2abcd9d95282eb6c2d9df31f95d
Author:     Petteri Räty <petsku <AT> petteriraty <DOT> eu>
AuthorDate: Sat Apr 16 16:31:14 2011 +0000
Commit:     Petteri Räty <betelgeuse <AT> gentoo <DOT> org>
CommitDate: Sun Apr 17 10:57:04 2011 +0000
URL:        http://git.overlays.gentoo.org/gitweb/?p=proj/libbash.git;a=commit;h=1d8b7e32

Parser: deprecated syntax for arithmetic expansion

Eclasses seem to be using a deprecated form of arithmetic expansion with
square brackets that bash does not document anywhere. This is now
supported by the parser.

---
 bashast/bashast.g              |    8 ++++++--
 bashast/gunit/arith_main.gunit |    1 +
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/bashast/bashast.g b/bashast/bashast.g
index 7939229..a3b7314 100644
--- a/bashast/bashast.g
+++ b/bashast/bashast.g
@@ -457,11 +457,15 @@ extended_pattern_match
 	|	AT LPAREN fname (PIPE fname)* RPAREN -> ^(MATCH_EXACTLY_ONE fname+)
 	|	BANG LPAREN fname (PIPE fname)* RPAREN -> ^(MATCH_NONE fname+);
 //Arithmetic expansion
+//the square bracket from is deprecated
+//http://permalink.gmane.org/gmane.comp.shells.bash.bugs/14479
 arithmetic_expansion
-	:	DOLLAR LLPAREN BLANK* arithmetics BLANK* RRPAREN -> ^(ARITHMETIC_EXPRESSION arithmetics);
+	:	DOLLAR LLPAREN BLANK* arithmetics BLANK* RRPAREN -> ^(ARITHMETIC_EXPRESSION arithmetics)
+	|	DOLLAR LSQUARE BLANK* arithmetics BLANK* RSQUARE -> ^(ARITHMETIC_EXPRESSION arithmetics);
 //explicit arithmetic in places like array indexes
 explicit_arithmetic
-	:	(DOLLAR LLPAREN BLANK*)? arithmetics (BLANK* RRPAREN)? -> arithmetics;
+	:	(DOLLAR LLPAREN BLANK*)? arithmetics (BLANK* RRPAREN)? -> arithmetics
+	|	(DOLLAR LSQUARE BLANK*)? arithmetics (BLANK* RSQUARE)? -> arithmetics;
 //The comma operator for arithmetic expansions
 arithmetics
 	:	arithmetic (BLANK!* COMMA! BLANK!* arithmetic)*;

diff --git a/bashast/gunit/arith_main.gunit b/bashast/gunit/arith_main.gunit
index 0f85d55..d8697af 100644
--- a/bashast/gunit/arith_main.gunit
+++ b/bashast/gunit/arith_main.gunit
@@ -125,6 +125,7 @@ arithmetic_condition:
 
 arithmetic_expansion:
 "$((5+4, 3+2, a*b))" -> (ARITHMETIC_EXPRESSION (+ 5 4) (+ 3 2) (* (VAR_REF a) (VAR_REF b)))
+"$[1]" -> (ARITHMETIC_EXPRESSION 1)
 
 start:
 "echo $(( 3 + 2 ))" -> (LIST (COMMAND (STRING echo) (STRING (ARITHMETIC_EXPRESSION (+ 3 2)))))