Move structs/enums into the right folder

1 files changed, 143 insertions, 0 deletions

diff --git a/src/compile/enums.c b/src/compile/enums.c
new file mode 100644
index 00000000..3abe0307
--- /dev/null
+++ b/src/compile/enums.c
@@ -0,0 +1,143 @@
+// Logic for compiling tagged unions (enums)
+#include <gc.h>
+#include <stdio.h>
+
+#include "../ast.h"
+#include "../compile.h"
+#include "../environment.h"
+#include "../naming.h"
+#include "../stdlib/tables.h"
+#include "../stdlib/text.h"
+#include "../typecheck.h"
+#include "structs.h"
+
+Text_t compile_enum_typeinfo(env_t *env, ast_t *ast) {
+    DeclareMatch(def, ast, EnumDef);
+
+    // Compile member types and constructors:
+    Text_t member_typeinfos = EMPTY_TEXT;
+    for (tag_ast_t *tag = def->tags; tag; tag = tag->next) {
+        if (!tag->fields) continue;
+
+        const char *tag_name = String(def->name, "$", tag->name);
+        type_t *tag_type = Table$str_get(*env->types, tag_name);
+        assert(tag_type && tag_type->tag == StructType);
+        member_typeinfos =
+            Texts(member_typeinfos, compile_struct_typeinfo(env, tag_type, tag_name, tag->fields, tag->secret, false));
+    }
+
+    int num_tags = 0;
+    for (tag_ast_t *t = def->tags; t; t = t->next)
+        num_tags += 1;
+
+    type_t *t = Table$str_get(*env->types, def->name);
+    const char *metamethods = is_packed_data(t) ? "PackedDataEnum$metamethods" : "Enum$metamethods";
+    Text_t info = namespace_name(env, env->namespace, Texts(def->name, "$$info"));
+    Text_t typeinfo = Texts("public const TypeInfo_t ", info, " = {", String((int64_t)type_size(t)), "u, ",
+                            String((int64_t)type_align(t)), "u, .metamethods=", metamethods,
+                            ", {.tag=EnumInfo, .EnumInfo={.name=\"", def->name,
+                            "\", "
+                            ".num_tags=",
+                            String((int64_t)num_tags), ", .tags=(NamedType_t[]){");
+
+    for (tag_ast_t *tag = def->tags; tag; tag = tag->next) {
+        const char *tag_type_name = String(def->name, "$", tag->name);
+        type_t *tag_type = Table$str_get(*env->types, tag_type_name);
+        if (tag_type && Match(tag_type, StructType)->fields)
+            typeinfo = Texts(typeinfo, "{\"", tag->name, "\", ", compile_type_info(tag_type), "}, ");
+        else typeinfo = Texts(typeinfo, "{\"", tag->name, "\"}, ");
+    }
+    typeinfo = Texts(typeinfo, "}}}};\n");
+    return Texts(member_typeinfos, typeinfo);
+}
+
+Text_t compile_enum_constructors(env_t *env, ast_t *ast) {
+    DeclareMatch(def, ast, EnumDef);
+    Text_t constructors = EMPTY_TEXT;
+    for (tag_ast_t *tag = def->tags; tag; tag = tag->next) {
+        if (!tag->fields) continue;
+
+        Text_t arg_sig = EMPTY_TEXT;
+        for (arg_ast_t *field = tag->fields; field; field = field->next) {
+            type_t *field_t = get_arg_ast_type(env, field);
+            arg_sig = Texts(arg_sig, compile_declaration(field_t, Texts("$", field->name)));
+            if (field->next) arg_sig = Texts(arg_sig, ", ");
+        }
+        if (arg_sig.length == 0) arg_sig = Text("void");
+        Text_t type_name = namespace_name(env, env->namespace, Texts(def->name, "$$type"));
+        Text_t tagged_name = namespace_name(env, env->namespace, Texts(def->name, "$tagged$", tag->name));
+        Text_t tag_name = namespace_name(env, env->namespace, Texts(def->name, "$tag$", tag->name));
+        Text_t constructor_impl = Texts("public inline ", type_name, " ", tagged_name, "(", arg_sig, ") { return (",
+                                        type_name, "){.$tag=", tag_name, ", .", valid_c_name(tag->name), "={");
+        for (arg_ast_t *field = tag->fields; field; field = field->next) {
+            constructor_impl = Texts(constructor_impl, "$", field->name);
+            if (field->next) constructor_impl = Texts(constructor_impl, ", ");
+        }
+        constructor_impl = Texts(constructor_impl, "}}; }\n");
+        constructors = Texts(constructors, constructor_impl);
+    }
+    return constructors;
+}
+
+Text_t compile_enum_header(env_t *env, ast_t *ast) {
+    DeclareMatch(def, ast, EnumDef);
+    Text_t all_defs = EMPTY_TEXT;
+    Text_t none_name = namespace_name(env, env->namespace, Texts(def->name, "$none"));
+    Text_t enum_name = namespace_name(env, env->namespace, Texts(def->name, "$$enum"));
+    Text_t enum_tags = Texts("{ ", none_name, "=0, ");
+
+    bool has_any_tags_with_fields = false;
+    for (tag_ast_t *tag = def->tags; tag; tag = tag->next) {
+        Text_t tag_name = namespace_name(env, env->namespace, Texts(def->name, "$tag$", tag->name));
+        enum_tags = Texts(enum_tags, tag_name);
+        if (tag->next) enum_tags = Texts(enum_tags, ", ");
+        has_any_tags_with_fields = has_any_tags_with_fields || (tag->fields != NULL);
+    }
+    enum_tags = Texts(enum_tags, " }");
+
+    if (!has_any_tags_with_fields) {
+        Text_t enum_def = Texts("enum ", enum_name, " ", enum_tags, ";\n");
+        Text_t info = namespace_name(env, env->namespace, Texts(def->name, "$$info"));
+        return Texts(enum_def, "extern const TypeInfo_t ", info, ";\n");
+    }
+
+    Text_t struct_name = namespace_name(env, env->namespace, Texts(def->name, "$$struct"));
+    Text_t enum_def = Texts("struct ", struct_name,
+                            " {\n"
+                            "enum ",
+                            enum_tags,
+                            " $tag;\n"
+                            "union {\n");
+    for (tag_ast_t *tag = def->tags; tag; tag = tag->next) {
+        if (!tag->fields) continue;
+        Text_t field_def = compile_struct_header(
+            env,
+            WrapAST(ast, StructDef, .name = Text$as_c_string(Texts(def->name, "$", tag->name)), .fields = tag->fields));
+        all_defs = Texts(all_defs, field_def);
+        Text_t tag_type = namespace_name(env, env->namespace, Texts(def->name, "$", tag->name, "$$type"));
+        enum_def = Texts(enum_def, tag_type, " ", valid_c_name(tag->name), ";\n");
+    }
+    enum_def = Texts(enum_def, "};\n};\n");
+    all_defs = Texts(all_defs, enum_def);
+
+    Text_t info = namespace_name(env, env->namespace, Texts(def->name, "$$info"));
+    all_defs = Texts(all_defs, "extern const TypeInfo_t ", info, ";\n");
+    for (tag_ast_t *tag = def->tags; tag; tag = tag->next) {
+        if (!tag->fields) continue;
+
+        Text_t arg_sig = EMPTY_TEXT;
+        for (arg_ast_t *field = tag->fields; field; field = field->next) {
+            type_t *field_t = get_arg_ast_type(env, field);
+            arg_sig = Texts(arg_sig, compile_declaration(field_t, Texts("$", field->name)));
+            if (field->next) arg_sig = Texts(arg_sig, ", ");
+        }
+        if (arg_sig.length == 0) arg_sig = Text("void");
+        Text_t enum_type = namespace_name(env, env->namespace, Texts(def->name, "$$type"));
+        Text_t tagged_name = namespace_name(env, env->namespace, Texts(def->name, "$tagged$", tag->name));
+        Text_t constructor_def = Texts(enum_type, " ", tagged_name, "(", arg_sig, ");\n");
+        all_defs = Texts(all_defs, constructor_def);
+    }
+    return all_defs;
+}
+
+// vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1,\:0