From 184118c1522ee4e78a0588fcac8eb235f512b599 Mon Sep 17 00:00:00 2001
From: Charlie Stanton <charlie@shtanton.xyz>
Date: Fri, 21 Apr 2023 11:19:18 +0100
Subject: Add :xyz: replacement syntax that removes whatever is before it and
 inserts whatever is inside it

---
 subex/subexast.go | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'subex/subexast.go')

diff --git a/subex/subexast.go b/subex/subexast.go
index ee7a959..dd98aa9 100644
--- a/subex/subexast.go
+++ b/subex/subexast.go
@@ -359,3 +359,16 @@ func (ast SubexASTEmpty) compileWith(next SubexState) SubexState {
 func (ast SubexASTEmpty) String() string {
 	return "()"
 }
+
+// Discards the output from the content subex
+type SubexASTDiscard struct {
+	Content SubexAST
+}
+func (ast SubexASTDiscard) compileWith(next SubexState) SubexState {
+	return &SubexCaptureBeginState {
+		next: ast.Content.compileWith(&SubexDiscardState {next}),
+	}
+}
+func (ast SubexASTDiscard) String() string {
+	return fmt.Sprintf("(%v)$_", ast.Content)
+}
-- 
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