add or= an and= operators

Author: leafo

moonscript/parse.lua

@@ -449,7 +449,7 @@ local build_grammar = wrap_env(function()
 		CompClause = CompFor + key"when" * Exp / mark"when",
 
 		Assign = sym"=" * (Ct(With + If + Switch) + Ct(TableBlock + ExpListLow)) / mark"assign",
-		Update = ((sym"..=" + sym"+=" + sym"-=" + sym"*=" + sym"/=" + sym"%=") / trim) * Exp / mark"update",
+		Update = ((sym"..=" + sym"+=" + sym"-=" + sym"*=" + sym"/=" + sym"%=" + sym"or=" + sym"and=") / trim) * Exp / mark"update",
 
 		-- we can ignore precedence for now
 		OtherOps = op"or" + op"and" + op"<=" + op">=" + op"~=" + op"!=" + op"==" + op".." + op"<" + op">",

tests/inputs/syntax.moon

@@ -232,4 +232,9 @@ a /= func "cool"
 x.then = "hello"
 x.while.true = "hello"
 
+--
+
+x or= "hello"
+x and= "hello"
+
 -- cooool

tests/outputs/syntax.lua

@@ -228,4 +228,7 @@ a = a * (3 + 5)
 a = a * 3
 a = a / func("cool")
 x["then"] = "hello"
-x["while"]["true"] = "hello"
+x["while"]["true"] = "hello"
+x = x or "hello"
+x = x and "hello"
+return x