fix #1025

src/ast.ls

@@ -708,7 +708,7 @@ class exports.Chain extends Node
         this
 
     auto-compare: (target) ->
-        test = @head
+        test = @head unless @tails.length
         switch
         | test instanceof Literal
             Binary \===  test, target.0

test/operator.ls

@@ -988,3 +988,15 @@ ok not (even or 1) 3
 ok ((.length > 4) or [1 2 3]) [1 2 3]
 
 eq 8 ((-> &0 + &1 is 5) and (**)) 2 3
+
+# [LiveScript#1025](https://github.com/gkz/LiveScript/issues/1025)
+# The placeholder logic from `match` is also applied here
+_ = -> -> false
+_.isString = -> typeof it == \string
+_.isNumber = -> typeof it == \number
+eq false (_.isString || _.isNumber) []
+eq false (_.isString || _!) []
+eq true  (_.isString || _.isNumber) 1
+
+# other examples of Chains with tails
+eq \bar ('foo'~slice || 'foobar'~slice) 3

test/switch.ls

@@ -275,6 +275,23 @@ match 1, 3, 3
 | _            => ok 0
 
 
+# [LiveScript#1025](https://github.com/gkz/LiveScript/issues/1025)
+# Expressions starting from `_` were treated as placeholders in `match` cases
+_ = -> -> false
+_.isString = -> typeof it == \string
+match 1
+| _.isString   => ok 0
+| (_.isString) => ok 0
+| _!           => ok 0
+match \foo
+| _.isString   => ok 1
+
+# other examples of Chains with tails
+match \foo
+| 'barbaz'~starts-with => ok 0
+| 'foobar'~starts-with => ok 1
+| otherwise            => ok 0
+
 # [LiveScript#926](https://github.com/gkz/LiveScript/issues/926)
 # `match` wasn't binding `this` correctly in expression position
 o =