Add merge command

1 files changed, 18 insertions, 3 deletions

diff --git a/subex/parse.go b/subex/parse.go
index 619c1c3..d825f75 100644
--- a/subex/parse.go
+++ b/subex/parse.go
@@ -183,7 +183,7 @@ func parseRepeatRange(l RuneReader) (output []ConvexRange) {
 	return output
 }
 
-func parseValueReplacement(l RuneReader) (output SubexAST) {
+func parseValueReplacement(l RuneReader, end rune) (output SubexAST) {
 	output = SubexASTEmpty{}
 	// TODO escaping
 	// TODO add arrays, maps and strings
@@ -193,7 +193,7 @@ func parseValueReplacement(l RuneReader) (output SubexAST) {
 		case eof:
 			panic("Missing closing `")
 		case ' ':
-		case '`':
+		case end:
 			break loop
 		case '$':
 			slot := l.Next()
@@ -207,6 +207,21 @@ func parseValueReplacement(l RuneReader) (output SubexAST) {
 				},
 			}
 		// TODO: destructures
+		case '#':
+			if !accept(l, "(") {
+				panic("Missing ( after #")
+			}
+			output = SubexASTConcat {
+				First: output,
+				Second: SubexASTDestructure {
+					Destructure: NoneStructure,
+					Structure: MapStructure,
+					Content: parseValueReplacement(l, ')'),
+				},
+			}
+			if !accept(l, "#") {
+				panic("Missing # after )")
+			}
 		case '"':
 			output = SubexASTConcat {
 				First: output,
@@ -501,7 +516,7 @@ func parseSubex(l RuneReader, minPower int, inType Type) (lhs SubexAST, outType
 			lhs = SubexASTCopyNumber{}
 		case '`':
 			outType = inType
-			lhs = parseValueReplacement(l)
+			lhs = parseValueReplacement(l, '`')
 		case ' ':
 			if inType == RuneType {
 				outType = RuneType