add try expression

See #83

1 files changed, 21 insertions, 0 deletions

diff --git a/src/ast_render.cpp b/src/ast_render.cpp
index 12642c71e2..4689f723ee 100644
--- a/src/ast_render.cpp
+++ b/src/ast_render.cpp
@@ -223,6 +223,8 @@ static const char *node_type_str(NodeType node_type) {
             return "TypeLiteral";
         case NodeTypeVarLiteral:
             return "VarLiteral";
+        case NodeTypeTryExpr:
+            return "TryExpr";
     }
     zig_unreachable();
 }
@@ -769,6 +771,25 @@ static void render_node_extra(AstRender *ar, AstNode *node, bool grouped) {
                 }
                 break;
             }
+        case NodeTypeTryExpr:
+            {
+                const char *var_str = node->data.try_expr.var_is_const ? "const" : "var";
+                const char *var_name = buf_ptr(node->data.try_expr.var_symbol);
+                const char *ptr_str = node->data.try_expr.var_is_ptr ? "*" : "";
+                fprintf(ar->f, "try (%s %s%s", var_str, ptr_str, var_name);
+                fprintf(ar->f, " = ");
+                render_node_grouped(ar, node->data.try_expr.target_node);
+                fprintf(ar->f, ") ");
+                render_node_grouped(ar, node->data.try_expr.then_node);
+                if (node->data.try_expr.else_node) {
+                    fprintf(ar->f, " else ");
+                    if (node->data.try_expr.err_symbol) {
+                        fprintf(ar->f, "|%s| ", buf_ptr(node->data.try_expr.err_symbol));
+                    }
+                    render_node_grouped(ar, node->data.try_expr.else_node);
+                }
+                break;
+            }
         case NodeTypeSwitchExpr:
             {
                 AstNodeSwitchExpr *switch_expr = &node->data.switch_expr;