1 files changed, 79 insertions, 0 deletions
diff --git a/archive/1.vm/018constant.cc b/archive/1.vm/018constant.cc
new file mode 100644
index 00000000..bbf3a412
--- /dev/null
+++ b/archive/1.vm/018constant.cc
@@ -0,0 +1,79 @@
+//: A few literal constants.
+
+:(before "End Mu Types Initialization")
+put(Type_ordinal, "literal-boolean", 0);
+
+//: 'true'
+
+:(code)
+void test_true() {
+  load(
+      "def main [\n"
+      "  1:boolean <- copy true\n"
+      "]\n"
+  );
+  CHECK_TRACE_CONTENTS(
+      "parse:   ingredient: {true: \"literal-boolean\"}\n"
+  );
+}
+
+:(before "End Parsing reagent")
+if (name == "true") {
+  if (type != NULL) {
+    raise << "'true' is a literal and can't take a type\n" << end();
+    return;
+  }
+  type = new type_tree("literal-boolean");
+  set_value(1);
+}
+
+//: 'false'
+
+:(code)
+void test_false() {
+  load(
+      "def main [\n"
+      "  1:boolean <- copy false\n"
+      "]\n"
+  );
+  CHECK_TRACE_CONTENTS(
+      "parse:   ingredient: {false: \"literal-boolean\"}\n"
+  );
+}
+
+:(before "End Parsing reagent")
+if (name == "false") {
+  if (type != NULL) {
+    raise << "'false' is a literal and can't take a type\n" << end();
+    return;
+  }
+  type = new type_tree("literal-boolean");
+  set_value(0);
+}
+
+//: 'null'
+
+:(before "End Mu Types Initialization")
+put(Type_ordinal, "literal-address", 0);
+
+:(code)
+void test_null() {
+  load(
+      "def main [\n"
+      "  1:address:number <- copy null\n"
+      "]\n"
+  );
+  CHECK_TRACE_CONTENTS(
+      "parse:   ingredient: {null: \"literal-address\"}\n"
+  );
+}
+
+:(before "End Parsing reagent")
+if (name == "null") {
+  if (type != NULL) {
+    raise << "'null' is a literal and can't take a type\n" << end();
+    return;
+  }
+  type = new type_tree("literal-address");
+  set_value(0);
+}