Add 'xo-reader/' from commit 'c46c0f1cc4'

git-subtree-dir: xo-reader
git-subtree-mainline: dacdeb2cd7
git-subtree-split: c46c0f1cc4

xo-reader/src/reader/expect_symbol_xs.cpp

@@ -0,0 +1,47 @@
+/* file expect_symbol_xs.cpp
+ *
+ * author: Roland Conybeare
+ */
+
+#include "expect_symbol_xs.hpp"
+#include "parserstatemachine.hpp"
+#include "exprstatestack.hpp"
+
+namespace xo {
+    namespace scm {
+        std::unique_ptr<expect_symbol_xs>
+        expect_symbol_xs::make() {
+            return std::make_unique<expect_symbol_xs>(expect_symbol_xs());
+        }
+
+        void
+        expect_symbol_xs::start(parserstatemachine * p_psm)
+        {
+            p_psm->push_exprstate(expect_symbol_xs::make());
+        }
+
+        expect_symbol_xs::expect_symbol_xs()
+            : exprstate(exprstatetype::expect_symbol)
+        {}
+
+        void
+        expect_symbol_xs::on_symbol_token(const token_type & tk,
+                                          parserstatemachine * p_psm)
+        {
+            constexpr bool c_debug_flag = true;
+            scope log(XO_DEBUG(c_debug_flag));
+
+            log && log(xtag("tk", tk));
+
+            /* have to do pop first, before sending symbol to
+             * the o.g. symbol-requester
+             */
+            std::unique_ptr<exprstate> self = p_psm->pop_exprstate();
+
+            p_psm->on_symbol(tk.text());
+        }
+    } /*namespace scm*/
+} /*namespace xo*/
+
+
+/* end expect_symbol_xs.cpp */