Parser is reading variable declarations, read more

This is an incomplete process. It's supposed to be robust enough to
support the types of arrays and dictionaries, but arrays and
dictionaries aren't implemented in the literals yet, so that's my next
task.

I'll come back to variable declarations later.

source/opcodes.h

@@ -11,7 +11,7 @@ typedef enum Opcode {
 	OP_LITERAL,
 	OP_LITERAL_LONG, //for more than 256 literals in a chunk
 
-	//operators
+	//arithmetic operators
 	OP_NEGATE,
 	OP_ADDITION,
 	OP_SUBTRACTION,
@@ -20,9 +20,15 @@ typedef enum Opcode {
 	OP_MODULO,
 	OP_GROUPING_BEGIN,
 	OP_GROUPING_END,
+
+	//variable stuff
 	OP_SCOPE_BEGIN,
 	OP_SCOPE_END,
 
+	OP_TYPE_DECL,  //declare a compound type to be used
+	OP_VAR_DECL,   //stack: literal name, literal type (referenced by array index)
+	OP_VAR_ASSIGN, //stack: literal name, literal value
+
 	//meta
 	OP_SECTION_END,
 	//TODO: add more