From ca4892ea62cfaca99f9174f58500457ea4a87354 Mon Sep 17 00:00:00 2001
From: Shagun Agrawal <agrawalshagun07@gmail.com>
Date: Sun, 11 Aug 2024 22:16:47 +0530
Subject: Add lexer

Add custom lexer

Pass chapter 1 lex stages
---
 src/cljcc/token.clj | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 src/cljcc/token.clj

(limited to 'src/cljcc/token.clj')

diff --git a/src/cljcc/token.clj b/src/cljcc/token.clj
new file mode 100644
index 0000000..6df4f43
--- /dev/null
+++ b/src/cljcc/token.clj
@@ -0,0 +1,71 @@
+(ns cljcc.token)
+
+(def token-kind
+  #{:eof
+    :semicolon
+
+    ;; brackets
+    :left-curly
+    :right-curly
+    :left-paren
+    :right-paren
+
+    ;; operators
+    :plus
+    :minus
+    :multiply
+    :divide
+    :remainder
+    :negate
+    :assignemnt
+    :ampersand
+    :bitwise-not
+    :bitwise-or
+    :bitwise-xor
+    :bitwise-left
+    :increment
+    :decrement
+
+    :number
+    :identifier
+
+    ;; keywords
+    :kw-return
+    :kw-int
+    :kw-void})
+
+(def chrs
+  #{})
+
+(def chrs-kind-map
+  {\( :left-paren
+   \) :right-paren
+   \{ :left-curly
+   \} :right-curly
+   \= :assignment
+   "--" :decrement
+   "++" :increment
+   \; :semicolon
+   \+ :plus
+   \- :minus
+   \* :multiply
+   \% :remainder
+   \/ :divide})
+
+(defn identifier->kind [identifier]
+  (case identifier
+    "return" :kw-return
+    "void" :kw-void
+    "int" :kw-int
+    :identifier))
+
+(defn create
+  ([kind line col]
+   {:kind kind
+    :line line
+    :col col})
+  ([kind line col literal]
+   {:kind kind
+    :line line
+    :col col
+    :literal literal}))
-- 
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