feat: add as_string function

sillydan1 · Dec 4, 2022 · b1bf12a · b1bf12a
1 parent feba171
commit b1bf12a
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diff --git a/include/symbol_table.h b/include/symbol_table.h
@@ -94,6 +94,7 @@ namespace expr {
     auto operator<<(std::ostream &os, const symbol_value_t &v) -> std::ostream&;
     auto operator<<(std::ostream &os, const symbol_table_t &m) -> std::ostream&;
     auto operator<<(std::ostream &os, const symbol_table_tree_t &t) -> std::ostream&;
+    auto as_string(const symbol_value_t& v) -> std::string;
 
     enum class operator_type_t {
         minus, plus, star, slash, percent, hat,

diff --git a/src/symbol_table.cpp b/src/symbol_table.cpp
@@ -192,6 +192,14 @@ namespace expr {
         t.apply_dfs(printer_func);
         return o;
     }
+
+    auto as_string(const symbol_value_t& v) -> std::string {
+        return std::visit(ya::overload{
+                [](const std::string &s) -> std::string { return s; },
+                [](const expr::clock_t &s) -> std::string { return std::to_string(s.time_units); },
+                [](auto &&v) -> std::string { return std::to_string(v); }
+        }, static_cast<const underlying_symbol_value_t &>(v));
+    }
 }
 
 auto std::hash<expr::symbol_value_t>::operator()(const expr::symbol_value_t& v) const -> size_t {