Add _;

LANGUAGE.md

@@ -881,6 +881,8 @@ This only works on strings:
 
 `a ; b`: evaluate a, discard its result, then evaluate b. Returns the result of b.
 
+`a;`: evaluate a, discard its result, returns nil.
+
 `a : b`: evaluate a and b, returns a new pair with a as key and b as value.
 
 `a :: b`: evaluate a and b, returns a new typed value with a as value and b as type.

parser/common.lua

@@ -46,6 +46,7 @@ common = {
 		"_^_",
 		"_._", "_!_",
 		-- suffix unop
+		"_;",
 		"_!",
 		-- special
 		"()",

parser/expression.lua

@@ -31,7 +31,7 @@ local prefix_unops_prio = {
 	[12] = { "&" }
 }
 local suffix_unops_prio = {
-	[1] = {},
+	[1] = { ";" },
 	[2] = {},
 	[3] = {},
 	[4] = {},

stdlib/functions.lua

@@ -7,6 +7,10 @@ lua_functions = {
 		mode = "raw",
 		value = function(a, b) return b end
 	},
+	["_;(a)"] = {
+		mode = "raw",
+		value = function(a) return { type = "nil", value = nil } end
+	},
 	-- comparaison
 	["_==_(a, b)"] = {
 		mode = "raw",