From bb783f8f31797597ca0349434e236e6df923e14b Mon Sep 17 00:00:00 2001
From: Marc Vertes <mvertes@free.fr>
Date: Tue, 7 Nov 2023 21:49:01 +0100
Subject: parser: implement switch statement

A VM instruction `EqualSet` has been added to preserve the left
operand on the stack in case of failure, to allow efficient
multiple tests on the same value.
Both the pattern 'if/else if' and the classical case clauses have
been implemented.
---
 lang/token.go | 1 +
 1 file changed, 1 insertion(+)

(limited to 'lang')

diff --git a/lang/token.go b/lang/token.go
index 880f474..95a1be5 100644
--- a/lang/token.go
+++ b/lang/token.go
@@ -109,6 +109,7 @@ const (
 	JumpFalse
 	JumpSetFalse
 	JumpSetTrue
+	EqualSet
 )
 
 func (t TokenId) IsKeyword() bool   { return t >= Break && t <= Var }
-- 
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