From 3eceb647e59b1fb324ce62092edb63a458a73545 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Sat, 20 Feb 2016 20:35:39 -0500
Subject: scan_wordexp_param_brace(): New function

---
(limited to 'parsing')

diff --git a/parsing/lexer.sh b/parsing/lexer.sh
index ad076dc..5c3f6c5 100644
--- a/parsing/lexer.sh
+++ b/parsing/lexer.sh
@@ -1,7 +1,9 @@
 fname=
 lineno=
+ln_off=
 start=
 c=
+wordexp=
 tok=
 tokens=
 
@@ -327,9 +329,6 @@ scan_word()
 
 scan_wordexp()
 {
-	local wordexp=
-	local ln_off=
-	local mod=
 	local res=
 	local param=
 	local word=
@@ -340,115 +339,7 @@ scan_wordexp()
 	case "${c}" in
 		'{')
 			# Parameter expansion brace
-			mod=true
-			lgetc
-			case "${c}" in
-				'#')
-					lgetc
-					case "${c}" in
-						[@*#?$!A-Za-z0-9_-])
-							# String length
-							# expansion
-							if ! res="$(scan_param)"
-							then
-								exit 1
-							fi
-							ln_off=${res%%${RS}*}
-							res="${res#*${RS}}"
-							c="${res%%${RS}*}"
-							res="${res#*${RS}}"
-							param="${res%%${RS}*}"
-							lineno=$((${lineno} + \
-								${ln_off}))
-							# Disable modifications.
-							mod=false
-							;;
-						*)
-							# Special parameter "#"
-							param='#'
-							;;
-					esac
-					;;
-				*)
-					if ! res="$(scan_param)"; then
-						exit 1
-					fi
-					ln_off=${res%%${RS}*}
-					res="${res#*${RS}}"
-					c="${res%%${RS}*}"
-					res="${res#*${RS}}"
-					param="${res%%${RS}*}"
-					lineno=$((${lineno} + ${ln_off}))
-					;;
-			esac
-			wordexp="\${${param}"
-			if ${mod}; then
-				# Check for modifications
-				mod=false
-				case "${c}" in
-					':')
-						mod=true
-						wordexp="${wordexp}${c}"
-						lgetc
-						case "${c}" in '-'|'='|'?'|'+')
-							wordexp="${wordexp}${c}"
-							lgetc
-						;;
-						esac
-						;;
-					'-'|'='|'?'|'+')
-						mod=true
-						wordexp="${wordexp}${c}"
-						lgetc
-						;;
-					'%')
-						mod=true
-						wordexp="${wordexp}${c}"
-						lgetc
-						case "${c}" in '%')
-							wordexp="${wordexp}${c}"
-							lgetc
-							;;
-						esac
-						;;
-					'#')
-						mod=true
-						wordexp="${wordexp}${c}"
-						lgetc
-						case "${c}" in '#')
-							wordexp="${wordexp}${c}"
-							lgetc
-							;;
-						esac
-						;;
-				esac
-			fi
-			if ${mod}; then
-				# Get word.
-				if ! res="$(scan_word true)"; then
-					exit 1
-				fi
-				ln_off=${res%%${RS}*}
-				res="${res#*${RS}}"
-				c="${res%%${RS}*}"
-				res="${res#*${RS}}"
-				word="${res%%${RS}*}"
-				# We must advance lineno because scan_word() was
-				# run in a subshell.
-				lineno=$((${lineno} + ${ln_off}))
-				wordexp="${wordexp}${word}"
-				dbg "param mod word: '$word'"
-			fi
-			# Check for right brace.
-			case "${c}" in
-				'}')
-					wordexp="${wordexp}${c}"
-					lgetc
-					;;
-				*)
-					synerr 'Missing "}"'
-					;;
-			esac
+			scan_wordexp_param_brace
 			;;
 		'(')
 			# Arithmetic expansion or command substitution
@@ -496,6 +387,129 @@ scan_wordexp()
 	return 0
 }
 
+scan_wordexp_param_brace()
+{
+	local mod=
+	local res=
+	local param=
+
+	ln_off=0
+	mod=true
+
+	lgetc
+	case "${c}" in
+		'#')
+			lgetc
+			case "${c}" in
+				[@*#?$!A-Za-z0-9_-])
+					# String length expansion
+					if ! res="$(scan_param)"; then
+						exit 1
+					fi
+					ln_off=${res%%${RS}*}
+					res="${res#*${RS}}"
+					c="${res%%${RS}*}"
+					res="${res#*${RS}}"
+					param="${res%%${RS}*}"
+					lineno=$((${lineno} + ${ln_off}))
+					# Disable modifications.
+					mod=false
+					;;
+				*)
+					# Special parameter "#"
+					param='#'
+					;;
+			esac
+			;;
+		*)
+			if ! res="$(scan_param)"; then
+				exit 1
+			fi
+			ln_off=${res%%${RS}*}
+			res="${res#*${RS}}"
+			c="${res%%${RS}*}"
+			res="${res#*${RS}}"
+			param="${res%%${RS}*}"
+			lineno=$((${lineno} + ${ln_off}))
+			;;
+	esac
+	wordexp="\${${param}"
+
+	# If modifications are allowed
+	if ${mod}; then
+		# Check for modifications.
+		mod=false
+		case "${c}" in
+			':')
+				mod=true
+				wordexp="${wordexp}${c}"
+				lgetc
+				case "${c}" in '-'|'='|'?'|'+')
+					wordexp="${wordexp}${c}"
+					lgetc
+				;;
+				esac
+				;;
+			'-'|'='|'?'|'+')
+				mod=true
+				wordexp="${wordexp}${c}"
+				lgetc
+				;;
+			'%')
+				mod=true
+				wordexp="${wordexp}${c}"
+				lgetc
+				case "${c}" in '%')
+					wordexp="${wordexp}${c}"
+					lgetc
+					;;
+				esac
+				;;
+			'#')
+				mod=true
+				wordexp="${wordexp}${c}"
+				lgetc
+				case "${c}" in '#')
+					wordexp="${wordexp}${c}"
+					lgetc
+					;;
+				esac
+				;;
+		esac
+	fi
+
+	# If a modification was found
+	if ${mod}; then
+		# Get word.
+		if ! res="$(scan_word true)"; then
+			exit 1
+		fi
+		ln_off=${res%%${RS}*}
+		res="${res#*${RS}}"
+		c="${res%%${RS}*}"
+		res="${res#*${RS}}"
+		word="${res%%${RS}*}"
+		# We must advance lineno because scan_word() was run in a
+		# subshell.
+		lineno=$((${lineno} + ${ln_off}))
+		wordexp="${wordexp}${word}"
+		dbg "param mod word: '$word'"
+	fi
+
+	# Check for right brace.
+	case "${c}" in
+		'}')
+			wordexp="${wordexp}${c}"
+			lgetc
+			;;
+		*)
+			synerr 'Missing "}"'
+			;;
+	esac
+
+	return 0
+}
+
 scan_param()
 {
 	local param=
diff --git a/parsing/parse.sh b/parsing/parse.sh
index a71f90b..8f73b32 100644
--- a/parsing/parse.sh
+++ b/parsing/parse.sh
@@ -624,12 +624,12 @@ try()
 }
 
 #try '"foo bar" && $baz || qux' '${quux%uux  quuux'
-#try '"foo bar" && $baz || qux' '${quux%uux } quuux'
-#try 'foo ${bar}'
-#try 'foo ${#bar}'
-#try 'foo ${bar#baz}'
-#try 'foo ${#bar#}'
-#try 'foo ${^}'
+try '"foo bar" && $baz || qux' '${quux%uux } quuux'
+try 'foo ${bar}'
+try 'foo ${#bar}'
+try 'foo ${bar#baz}'
+try 'foo ${#bar#}'
+try 'foo ${^}'
 #try 'foo `bar`'
 #try 'foo &&'
 #try '{ foo; }'
@@ -643,9 +643,9 @@ try()
 #try 'foo(){ bar; }'
 #try 'case foo in bar) baz;; (qux) quux;; quux);; esac'
 #try 'foo bar ( baz )'
-try 'foo $(bar)'
-try 'foo $(bar); baz'
-try 'foo $(bar)' 'baz'
-try 'foo $(bar) baz'
-try 'foo$(bar$(baz))qux'
+#try 'foo $(bar)'
+#try 'foo $(bar); baz'
+#try 'foo $(bar)' 'baz'
+#try 'foo $(bar) baz'
+#try 'foo$(bar$(baz))qux'
 #try 'foo $((1 + 1))'
--
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