[YARP] Implement SourceNodes (File, Line, Encoding) (#8328)

* [YARP] Implement SourceNodes (File, Line, Encoding)

yarp/yarp_compiler.c

@@ -1272,6 +1272,39 @@ yp_compile_node(rb_iseq_t *iseq, const yp_node_t *node, LINK_ANCHOR *const ret,
 
           return;
       }
+      case YP_NODE_SOURCE_ENCODING_NODE: {
+          const char *encoding = compile_context->parser->encoding.name;
+          if (!popped) {
+              rb_encoding *enc = rb_find_encoding(rb_str_new_cstr(encoding));
+              if (!enc) {
+                  rb_bug("Encoding not found!");
+              }
+              ADD_INSN1(ret, &dummy_line_node, putobject, rb_enc_from_encoding(enc));
+          }
+          return;
+      }
+      case YP_NODE_SOURCE_FILE_NODE: {
+          yp_source_file_node_t *source_file_node = (yp_source_file_node_t *)node;
+
+          if (!popped) {
+              VALUE filepath;
+              if (source_file_node->filepath.length == 0) {
+                  filepath = rb_fstring_lit("<compiled>");
+              }
+              else {
+                  filepath = parse_string(&source_file_node->filepath);
+              }
+
+              ADD_INSN1(ret, &dummy_line_node, putstring, filepath);
+          }
+          return;
+      }
+      case YP_NODE_SOURCE_LINE_NODE: {
+          if (!popped) {
+              ADD_INSN1(ret, &dummy_line_node, putobject, INT2FIX(lineno));
+          }
+          return;
+      }
       case YP_NODE_SPLAT_NODE: {
           yp_splat_node_t *splat_node = (yp_splat_node_t *)node;
           yp_compile_node(iseq, splat_node->expression, ret, src, popped, compile_context);