Make API chainable.

2020-07-12 11:46:53 +08:00
parent 2a8d63fd5f
commit 8449f8c55e
22 changed files with 223 additions and 143 deletions
--- a/src/syntax.rs
+++ b/src/syntax.rs
@@ -39,7 +39,7 @@ pub type FnCustomSyntaxEval = dyn Fn(
        &mut State,
        &Module,
        &mut Option<&mut Dynamic>,
-        &[Expr],
+        &[Expression],
        usize,
    ) -> Result<Dynamic, Box<EvalAltResult>>
    + Send
@@ -75,7 +75,7 @@ impl Engine {
            ) -> Result<Dynamic, Box<EvalAltResult>>
            + SendSync
            + 'static,
-    ) -> Result<(), Box<LexError>> {
+    ) -> Result<self, Box<LexError>> {
        if value.is_empty() {
            return Err(Box::new(LexError::ImproperSymbol("".to_string())));
        }
@@ -145,6 +145,6 @@ impl Engine {
            .unwrap()
            .insert(key, syntax.into());

-        Ok(())
+        Ok(self)
    }
 }