implemented data types for symbol table

pkg/shsh/symbol_table.go

@@ -4,7 +4,22 @@ import (
     "strings"
 )
 
-// TODO: Enum{Operator, Variable}
-// TODO build hashmap bucket
-// TODO define type for function signature operation
-// TODO functions for get_symbol, add_symbol
+// TODO: Maybe I should just have two tables
+
+type operation func(*Token) *Token
+type symbol_tag int
+const (
+    SYM_OPERATOR symbol_tag = iota,
+    SYM_VARIABLE symbol_tag = iota
+)
+
+type bucket struct {
+    symbol string
+    tag    symbol_tag
+    _inner interface{}
+}
+
+func set_variable(key string, val string) {}
+func get_variable(arg string) string {}
+func set_operator(key string, val operation) {}
+func get_operator(arg string) operation {}