diff --git a/grammar.txt b/grammar.txt
index af792bd..c00d4f6 100644
--- a/grammar.txt
+++ b/grammar.txt
@@ -22,12 +22,12 @@
 <declaration> ::= "let" <IDENT> "=" <expression> ";"
 
 
-<assignment> ::= <IDENT> "=" <expression> ";"
+<assignment> ::= { call "." } <IDENT> "=" <expression> ";"
 
 
 <fn-decl> ::= "fn" <IDENT> <fn-args> <block>
 
-<fn-args> ::= "(" { <IDENT> { "," } } ")"
+<fn-args> ::= "(" <ident-list> ")"
 
 
 <if-stmt> ::= "if" <expression> <block> { <else-part> }
@@ -66,7 +66,7 @@
 
 <unary> ::= { ( "not" | "-" ) } <call>
 
-<call> ::= <primary> ( "(" { <expr> "," } ")" | "." <call> )
+<call> ::= <primary> { ( "(" <expr-list> ")" | "." <IDENT> ) }
 
 <primary> ::= <IDENT>
             | <NUMBER>
@@ -78,6 +78,11 @@
             | "null"
             | "(" <expression> ")"
 
-<object-literal> = "{}"
+<object-literal> ::= "{}"
 
-<array-literal> = "[" { <expression> { "," } } "]"
+<array-literal> ::= "[" <expr-list> "]"
+
+
+<expr-list> ::= { <expression> { "," <expression> } { "," } }
+
+<ident-list> ::=  { <IDENT> { "," <IDENT> } { "," } }
\ No newline at end of file