Add $$ marker to custom syntax.

2021-10-25 22:41:42 +08:00
parent 76ac24dd85
commit 79dd3f8186
7 changed files with 38 additions and 17 deletions
--- a/src/custom_syntax.rs
+++ b/src/custom_syntax.rs
@@ -33,6 +33,8 @@ pub mod markers {
    pub const CUSTOM_SYNTAX_MARKER_FLOAT: &str = "$float$";
    /// Special marker for matching a boolean value.
    pub const CUSTOM_SYNTAX_MARKER_BOOL: &str = "$bool$";
+    /// Special marker for identifying the custom syntax variant.
+    pub const CUSTOM_SYNTAX_MARKER_SYNTAX_VARIANT: &str = "$$";
 }

 /// A general expression evaluation trait object.