From e0c5f51bd50b46fafd726166cb6d9e4e21d6517f Mon Sep 17 00:00:00 2001
From: Martin Atkins <mart@degeneration.co.uk>
Date: Tue, 13 Jun 2017 08:43:03 -0700
Subject: [PATCH] zclsyntax: "Keyword" type

This is a helper for recognizing identifiers that are actually keywords.
---
 zcl/zclsyntax/keywords.go | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 zcl/zclsyntax/keywords.go

diff --git a/zcl/zclsyntax/keywords.go b/zcl/zclsyntax/keywords.go
new file mode 100644
index 0000000..83e1109
--- /dev/null
+++ b/zcl/zclsyntax/keywords.go
@@ -0,0 +1,18 @@
+package zclsyntax
+
+import (
+	"bytes"
+)
+
+type Keyword []byte
+
+var forKeyword = Keyword([]byte{'f', 'o', 'r'})
+var inKeyword = Keyword([]byte{'i', 'n'})
+var ifKeyword = Keyword([]byte{'i', 'f'})
+
+func (kw Keyword) TokenMatches(token Token) bool {
+	if token.Type != TokenIdent {
+		return false
+	}
+	return bytes.Equal([]byte(kw), token.Bytes)
+}