All: add keywords.

Also, fix nth and count to match cloure.

1 files changed, 18 insertions, 4 deletions

diff --git a/go/src/types/types.go b/go/src/types/types.go
index 613bfb5..54e4176 100644
--- a/go/src/types/types.go
+++ b/go/src/types/types.go
@@ -4,6 +4,7 @@ import (
     "reflect"
     "errors"
     "fmt"
+    "strings"
 )
 
 // Errors/Exceptions
@@ -21,10 +22,9 @@ type MalType interface {
 }
 
 type EnvType interface {
-    //Find(key string) *EnvType
-    Find(key string) EnvType
-    Set(key string, value MalType) MalType
-    Get(key string) (MalType, error)
+    Find(key Symbol) EnvType
+    Set(key Symbol, value MalType) MalType
+    Get(key Symbol) (MalType, error)
 }
 
 // Scalars
@@ -57,6 +57,20 @@ func Symbol_Q(obj MalType) bool {
 }
 
 
+// Keywords
+func NewKeyword(s string) (MalType, error) {
+    return "\u029e" + s, nil;
+}
+
+func Keyword_Q(obj MalType) bool {
+    if obj == nil { return false }
+    switch s := obj.(type) {
+    case string: return strings.HasPrefix(s, "\u029e")
+    default: return false
+    }
+}
+
+
 // Strings
 func String_Q(obj MalType) bool {
     if obj == nil { return false }