From f3911888915f6aa96e6b28bd2a98a662faf20f47 Mon Sep 17 00:00:00 2001
From: Charlie Stanton <charlie@shtanton.xyz>
Date: Fri, 23 Sep 2022 14:55:58 +0100
Subject: Adds try, maybe and join operators with !, ? and ; respectively

---
 main/subexast.go | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

(limited to 'main/subexast.go')

diff --git a/main/subexast.go b/main/subexast.go
index 7e2f33c..54cc5fe 100644
--- a/main/subexast.go
+++ b/main/subexast.go
@@ -115,3 +115,39 @@ func (ast SubexASTOutput) compileWith(next SubexState) SubexState {
 		next: next,
 	}
 }
+
+type SubexASTTry struct {
+	content SubexAST
+}
+func (ast SubexASTTry) compileWith(next SubexState) SubexState {
+	return SubexGroupState {
+		ast.content.compileWith(next),
+		next,
+	}
+}
+
+type SubexASTMaybe struct {
+	content SubexAST
+}
+func (ast SubexASTMaybe) compileWith(next SubexState) SubexState {
+	return SubexGroupState {
+		next,
+		ast.content.compileWith(next),
+	}
+}
+
+type SubexASTJoin struct {
+	content, delimiter SubexAST
+}
+func (ast SubexASTJoin) compileWith(next SubexState) SubexState {
+	afterContentState := &SubexGroupState {
+		nil,
+		next,
+	}
+	manyContentsState := ast.content.compileWith(afterContentState)
+	afterContentState.first = ast.delimiter.compileWith(manyContentsState)
+	return SubexGroupState {
+		manyContentsState,
+		next,
+	}
+}
-- 
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