Improve init_string determination for constants

src/check_type.cpp

@@ -731,6 +731,7 @@ void check_enum_type(CheckerContext *ctx, Type *enum_type, Type *named_type, Ast
 		Ast *field = et->fields[i];
 		Ast *ident = nullptr;
 		Ast *init = nullptr;
+		u32 entity_flags = 0;
 		if (field->kind == Ast_FieldValue) {
 			ast_node(fv, FieldValue, field);
 			if (fv->field == nullptr || fv->field->kind != Ast_Ident) {
@@ -764,6 +765,7 @@ void check_enum_type(CheckerContext *ctx, Type *enum_type, Type *named_type, Ast
 			}
 		} else {
 			iota = exact_binary_operator_value(Token_Add, iota, exact_value_i64(1));
+			entity_flags |= EntityConstantFlag_ImplicitEnumValue;
 		}
 
 
@@ -800,6 +802,7 @@ void check_enum_type(CheckerContext *ctx, Type *enum_type, Type *named_type, Ast
 		e->identifier = ident;
 		e->flags |= EntityFlag_Visited;
 		e->state = EntityState_Resolved;
+		e->Constant.flags |= entity_flags;
 
 		if (scope_lookup_current(ctx->scope, name) != nullptr) {
 			error(ident, "'%.*s' is already declared in this enumeration", LIT(name));

src/docs_writer.cpp

@@ -831,13 +831,31 @@ OdinDocEntityIndex odin_doc_add_entity(OdinDocWriter *w, Entity *e) {
 		break;
 	}
 
+	OdinDocString init_string = {};
+	if (init_expr) {
+		init_string = odin_doc_expr_string(w, init_expr);
+	} else {
+		if (e->kind == Entity_Constant) {
+			if (e->Constant.flags & EntityConstantFlag_ImplicitEnumValue) {
+				init_string = {}; // Blank
+			} else if (e->Constant.param_value.original_ast_expr) {
+				init_string = odin_doc_expr_string(w, e->Constant.param_value.original_ast_expr);
+			} else {
+				init_string = odin_doc_write_string(w, make_string_c(exact_value_to_string(e->Constant.value)));
+			}
+		} else if (e->kind == Entity_Variable) {
+			if (e->Variable.param_expr) {
+				init_string = odin_doc_expr_string(w, e->Variable.param_expr);
+			}
+		}
+	}
 
 	doc_entity.kind = kind;
 	doc_entity.flags = flags;
 	doc_entity.pos = odin_doc_token_pos_cast(w, e->token.pos);
 	doc_entity.name = odin_doc_write_string(w, e->token.string);
 	doc_entity.type = 0; // Set later
-	doc_entity.init_string = odin_doc_expr_string(w, init_expr);
+	doc_entity.init_string = init_string;
 	doc_entity.comment = odin_doc_comment_group_string(w, comment);
 	doc_entity.docs = odin_doc_comment_group_string(w, docs);
 	doc_entity.foreign_library = 0; // Set later

src/entity.cpp

@@ -93,7 +93,9 @@ struct ParameterValue {
 	};
 };
 
-
+enum EntityConstantFlags : u32 {
+	EntityConstantFlag_ImplicitEnumValue = 1<<0,
+};
 
 // An Entity is a named "thing" in the language
 struct Entity {
@@ -126,6 +128,7 @@ struct Entity {
 		struct {
 			ExactValue value;
 			ParameterValue param_value;
+			u32 flags;
 		} Constant;
 		struct {
 			Ast *init_expr; // only used for some variables within procedure bodies