From 04259ac74894f5e0b3319efe17c833b179d483e3 Mon Sep 17 00:00:00 2001
From: Eduardo Julian
Date: Mon, 8 Dec 2014 23:38:12 -0400
Subject: Can now define inside modules: simple classes with public fields.

---
 src/lang.clj          |  3 +++
 src/lang/compiler.clj | 20 ++++++++++++++++++--
 src/lang/parser.clj   |  9 +++++++++
 3 files changed, 30 insertions(+), 2 deletions(-)

(limited to 'src')

diff --git a/src/lang.clj b/src/lang.clj
index 6502c3a29..22492eac6 100644
--- a/src/lang.clj
+++ b/src/lang.clj
@@ -37,5 +37,8 @@
   ;; TODO: Add signatures & structures.
   ;; TODO: Add type-system.
   ;; TODO: Allow defining constants.
+  ;; TODO: Allow importing Java classes.
+  ;; TODO: Allow using other modules.
+  ;; TODO: 
   ;; TODO: 
   )
diff --git a/src/lang/compiler.clj b/src/lang/compiler.clj
index 3e63fc801..26236da93 100644
--- a/src/lang/compiler.clj
+++ b/src/lang/compiler.clj
@@ -128,7 +128,22 @@
 (defcompiler ^:private compile-module
   [::&parser/module]
   (.visit *writer* Opcodes/V1_5 (+ Opcodes/ACC_PUBLIC Opcodes/ACC_SUPER)
-          *name* nil "java/lang/Object" nil))
+          (->class *name*) nil "java/lang/Object" nil))
+
+(defcompiler ^:private compile-defclass
+  [::&parser/defclass ?name ?fields]
+  (do (prn 'compile-defclass ?name ?fields)
+    (let [=class (doto (new ClassWriter ClassWriter/COMPUTE_MAXS)
+                   (.visit Opcodes/V1_5 (+ Opcodes/ACC_PUBLIC Opcodes/ACC_SUPER)
+                           (->class (str *name* "." ?name)) nil "java/lang/Object" nil))]
+      (doseq [[class field] ?fields]
+        (doto (.visitField =class Opcodes/ACC_PUBLIC field (->type-signature class) nil nil)
+          (.visitEnd)))
+      (.visitEnd =class)
+      (let [parent-dir (->class *name*)]
+        (.mkdirs (java.io.File. parent-dir))
+        (with-open [stream (java.io.BufferedOutputStream. (java.io.FileOutputStream. (str parent-dir "/" ?name ".class")))]
+          (.write stream (.toByteArray =class)))))))
 
 (let [+compilers+ [compile-boolean
                    compile-string
@@ -139,7 +154,8 @@
                    compile-ann-class
                    compile-if
                    compile-def
-                   compile-module]]
+                   compile-module
+                   compile-defclass]]
   (defn ^:private compile-form [state]
     (prn 'compile-form/state state)
     (some #(% state) +compilers+)))
diff --git a/src/lang/parser.clj b/src/lang/parser.clj
index 5adf36030..beb14302d 100644
--- a/src/lang/parser.clj
+++ b/src/lang/parser.clj
@@ -107,6 +107,14 @@
   [::&lexer/list ([[::&lexer/ident "module"]] :seq)]
   (return [::module]))
 
+(defparser ^:private parse-defclass
+  [::&lexer/list ([[::&lexer/ident "defclass"] [::&lexer/ident ?name] [::&lexer/tuple ?fields]] :seq)]
+  (let [fields (for [field ?fields]
+                 (match field
+                   [::&lexer/tuple ([[::&lexer/ident ?class] [::&lexer/ident ?field]] :seq)]
+                   [?class ?field]))]
+    (return [::defclass ?name fields])))
+
 (defparser ^:private parse-tagged
   [::&lexer/list ([[::&lexer/tag ?tag] ?data] :seq)]
   (exec [=data (apply-m parse-form (list ?data))]
@@ -190,6 +198,7 @@
               parse-dynamic-access
               parse-ann-class
               parse-module
+              parse-defclass
               parse-fn-call]))
 
 ;; [Interface]
-- 
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