From 453c3610f9f17c48f4c62d7b04939275ea7c5406 Mon Sep 17 00:00:00 2001
From: Bruce Hill <bruce@bruce-hill.com>
Date: Wed, 4 Sep 2024 16:21:27 -0400
Subject: [PATCH] Support parsing enums (without members)

---
 compile.c | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/compile.c b/compile.c
index caa59e3..e475486 100644
--- a/compile.c
+++ b/compile.c
@@ -3089,6 +3089,28 @@ CORD compile_cli_arg_call(env_t *env, CORD fn_name, type_t *fn_type)
                             "}\n");
             break;
         }
+        case EnumType: {
+            env_t *enum_env = Match(t, EnumType)->env;
+            code = CORD_all(code, "else if (pop_flag(argv, &i, \"", flag, "\", &flag)) {\n",
+                            "if (flag.length == 0)\n"
+                            "USAGE_ERR(\"No value provided for '--", flag, "'\");\n");
+            CORD all_tags = CORD_EMPTY;
+            for (tag_t *tag = Match(t, EnumType)->tags; tag; tag = tag->next) {
+                if (tag->type && Match(tag->type, StructType)->fields)
+                    compiler_err(NULL, NULL, NULL,
+                                 "The type %T has enum fields with member values, which is not yet supported for command line arguments.");
+                all_tags = CORD_all(all_tags, " ", tag->name);
+                binding_t *b = get_binding(enum_env, tag->name);
+                code = CORD_all(code,
+                                "if (Text$equal_ignoring_case(flag, Text(\"", tag->name, "\"))) {\n"
+                                "$", arg->name, " = ", b->code, ";\n",
+                                arg->name, "$is_set = yes;\n"
+                                "} else ");
+            }
+            code = CORD_all(code, "USAGE_ERR(\"Invalid value provided for '--", flag, "'; valid values are:", all_tags, "\");\n",
+                            "}\n");
+            break;
+        }
         default:
             compiler_err(NULL, NULL, NULL, "Main function has unsupported argument type: %T", t);
         }
@@ -3125,6 +3147,22 @@ CORD compile_cli_arg_call(env_t *env, CORD fn_name, type_t *fn_type)
                 "if (i < argc) {");
             if (t->tag == TextType) {
                 code = CORD_all(code, "$", arg->name, " = Text$from_str(argv[i]);\n");
+            } else if (t->tag == EnumType) {
+                env_t *enum_env = Match(t, EnumType)->env;
+                CORD all_tags = CORD_EMPTY;
+                for (tag_t *tag = Match(t, EnumType)->tags; tag; tag = tag->next) {
+                    if (tag->type && Match(tag->type, StructType)->fields)
+                        compiler_err(NULL, NULL, NULL,
+                                     "The type %T has enum fields with member values, which is not yet supported for command line arguments.");
+                    all_tags = CORD_all(all_tags, " ", tag->name);
+                    binding_t *b = get_binding(enum_env, tag->name);
+                    code = CORD_all(code,
+                                    "if (strcasecmp(argv[i], \"", tag->name, "\") == 0) {\n"
+                                    "$", arg->name, " = ", b->code, ";\n",
+                                    arg->name, "$is_set = yes;\n"
+                                    "} else ");
+                }
+                code = CORD_all(code, "USAGE_ERR(\"Invalid value provided for '--", arg->name, "'; valid values are:", all_tags, "\");\n");
             } else {
                 code = CORD_all(
                     code,