From 40752ebfb3ec8355b4f17681f8aab0ca7f6992f4 Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@gmail.com>
Date: Mon, 1 Feb 2010 21:27:12 -0500
Subject: Implement #declare, #local, and #undef in middle tier.

Oh God this is ugly...
---
 dimension/directives.rules | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 dimension/directives.rules

(limited to 'dimension/directives.rules')

diff --git a/dimension/directives.rules b/dimension/directives.rules
new file mode 100644
index 0000000..916039b
--- /dev/null
+++ b/dimension/directives.rules
@@ -0,0 +1,35 @@
+/*
+ * Start symbol
+ */
+
+LANGUAGE_DIRECTIVE: "#declare" "identifier" "=" RVALUE {
+                    dmnsn_declare_symbol(symtable, $2, $4);
+                    free($2);
+                    dmnsn_delete_astnode($4);
+                  }
+                  | "#local" "identifier" "=" RVALUE {
+                    dmnsn_local_symbol(symtable, $2, $4);
+                    free($2);
+                    dmnsn_delete_astnode($4);
+                  }
+                  | "#undef" "identifier" {
+                    dmnsn_undef_symbol(symtable, $2);
+                    free($2);
+                  }
+
+RVALUE: ARITH_EXPR ";" %dprec 2 {
+        $$ = dmnsn_eval($1, symtable);
+        dmnsn_delete_astnode($1);
+
+        if ($$.type == DMNSN_AST_NONE) {
+          dmnsn_delete_astnode($$);
+          YYERROR;
+        }
+      }
+      | COLOR ";" %dprec 1
+      | OBJECT
+      | TEXTURE
+      | PIGMENT
+      | FINISH
+      | CAMERA
+      | TRANSFORMATION
-- 
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