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// Logic for compiling new struct types defined in code
#include <ctype.h>
#include <gc/cord.h>
#include <gc.h>
#include <stdio.h>
#include "ast.h"
#include "stdlib/text.h"
#include "compile.h"
#include "cordhelpers.h"
#include "environment.h"
#include "typecheck.h"
#include "stdlib/util.h"
static CORD compile_str_method(env_t *env, ast_t *ast)
{
auto def = Match(ast, StructDef);
CORD full_name = CORD_cat(namespace_prefix(env, env->namespace), def->name);
const char *name = def->name;
const char *dollar = strrchr(name, '$');
if (dollar) name = dollar + 1;
CORD str_func = CORD_asprintf("static Text_t %r$as_text(%r_t *obj, bool use_color) {\n"
"\tif (!obj) return Text(\"%s\");\n", full_name, full_name, name);
if (def->secret) {
CORD_appendf(&str_func, "\treturn use_color ? Text(\"\\x1b[0;1m%s\\x1b[m(\\x1b[2m...\\x1b[m)\") : Text(\"%s(...)\");\n}",
name, name);
} else if (def->fields && !def->fields->next) { // Single-member structs don't need to print names:
type_t *field_type = get_arg_ast_type(env, def->fields);
CORD field_str = expr_as_text(env, CORD_cat("obj->$", def->fields->name), field_type, "use_color");
str_func = CORD_all(str_func, "\treturn Text$concat(use_color ? Text(\"\\x1b[0;1m", name, "\\x1b[m(\") : Text(\"", name, "(\"), ",
field_str, ", Text(\")\"));\n}\n");
} else {
CORD_appendf(&str_func, "\treturn Text$concat(use_color ? Text(\"\\x1b[0;1m%s\\x1b[m(\") : Text(\"%s(\")", name, name);
for (arg_ast_t *field = def->fields; field; field = field->next) {
type_t *field_type = get_arg_ast_type(env, field);
CORD field_str = expr_as_text(env, CORD_cat("obj->$", field->name), field_type, "use_color");
CORD_appendf(&str_func, ", Text(\"%s=\"), %r", field->name, field_str);
if (field->next) CORD_appendf(&str_func, ", Text(\", \")");
}
CORD_appendf(&str_func, ", Text(\")\"));\n}\n");
}
return str_func;
}
static CORD compile_compare_method(env_t *env, ast_t *ast)
{
auto def = Match(ast, StructDef);
CORD full_name = CORD_cat(namespace_prefix(env, env->namespace), def->name);
CORD cmp_func = CORD_all("static int ", full_name, "$compare(const ", full_name, "_t *x, const ", full_name,
"_t *y, const TypeInfo *info) {\n"
"(void)info;\n",
"int diff;\n");
for (arg_ast_t *field = def->fields; field; field = field->next) {
type_t *field_type = get_arg_ast_type(env, field);
switch (field_type->tag) {
case BigIntType:
cmp_func = CORD_all(cmp_func, "diff = Int$compare_value(x->$", field->name, ", y->$", field->name, ");");
break;
case BoolType: case IntType: case NumType: case PointerType: case FunctionType:
cmp_func = CORD_all(cmp_func, "diff = (x->$", field->name, " > y->$", field->name, ") - (x->$", field->name, " < y->$", field->name, ");");
break;
default:
cmp_func = CORD_all(cmp_func, "diff = generic_compare(&x->$", field->name, ", &y->$", field->name, ", ",
compile_type_info(env, field_type), ");\n");
break;
}
cmp_func = CORD_all(cmp_func, "if (diff != 0) return diff;\n");
}
cmp_func = CORD_all(cmp_func, "return 0;\n}\n");
return cmp_func;
}
static CORD compile_equals_method(env_t *env, ast_t *ast)
{
auto def = Match(ast, StructDef);
CORD full_name = CORD_cat(namespace_prefix(env, env->namespace), def->name);
CORD eq_func = CORD_all("static bool ", full_name, "$equal(const ", full_name, "_t *x, const ", full_name,
"_t *y, const TypeInfo *info) {\n"
"(void)info;\n");
CORD condition = CORD_EMPTY;
for (arg_ast_t *field = def->fields; field; field = field->next) {
if (condition != CORD_EMPTY)
condition = CORD_all(condition, " && ");
type_t *field_type = get_arg_ast_type(env, field);
switch (field_type->tag) {
case BigIntType:
condition = CORD_all(condition, "Int$equal_value(x->$", field->name, ", y->$", field->name, ")");
break;
case BoolType: case IntType: case NumType: case PointerType: case FunctionType:
condition = CORD_all(condition, "(x->$", field->name, " == y->$", field->name, ")");
break;
default:
condition = CORD_all(condition, "generic_equal(&x->$", field->name, ", &y->$", field->name, ", ",
compile_type_info(env, field_type), ")");
break;
}
}
eq_func = CORD_all(eq_func, "return ", condition, ";\n}\n");
return eq_func;
}
static CORD compile_hash_method(env_t *env, ast_t *ast)
{
auto def = Match(ast, StructDef);
CORD full_name = CORD_cat(namespace_prefix(env, env->namespace), def->name);
CORD hash_func = CORD_all("static uint64_t ", full_name, "$hash(const ", full_name, "_t *obj, const TypeInfo *info) {\n"
"(void)info;\n"
"uint64_t field_hashes[] = {");
for (arg_ast_t *field = def->fields; field; field = field->next) {
type_t *field_type = get_arg_ast_type(env, field);
if (field_type->tag == BoolType) // Bools can be bit fields, so you can't use *obj->field there:
hash_func = CORD_all(hash_func, "\n(uint32_t)(obj->$", field->name, "),");
else
hash_func = CORD_all(hash_func, "\ngeneric_hash(&obj->$", field->name, ", ", compile_type_info(env, field_type), "),");
}
hash_func = CORD_all(hash_func, "};\n"
"return siphash24((void*)&field_hashes, sizeof(field_hashes));\n}\n");
return hash_func;
}
void compile_struct_def(env_t *env, ast_t *ast)
{
auto def = Match(ast, StructDef);
CORD full_name = CORD_cat(namespace_prefix(env, env->namespace), def->name);
type_t *t = Table$str_get(*env->types, def->name);
assert(t && t->tag == StructType);
auto struct_ = Match(t, StructType);
if (def->fields) {
CORD typeinfo = CORD_asprintf("public const TypeInfo %r = {%zu, %zu, {.tag=StructInfo, .CustomInfo={",
full_name, type_size(t), type_align(t));
typeinfo = CORD_all(typeinfo, ".as_text=(void*)", full_name, "$as_text, ");
env->code->funcs = CORD_all(env->code->funcs, compile_str_method(env, ast));
if (struct_->fields && !struct_->fields->next) { // Single member, can just use its methods
type_t *member_t = struct_->fields->type;
switch (member_t->tag) {
case IntType: case NumType:
typeinfo = CORD_all(typeinfo, ".compare=(void*)", type_to_cord(member_t), "$compare, "
".equal=(void*)", type_to_cord(member_t), "$equal, ");
goto got_methods;
case BigIntType: case TextType:
typeinfo = CORD_all(typeinfo, ".hash=(void*)", type_to_cord(member_t), "$hash", ", ",
".compare=(void*)", type_to_cord(member_t), "$compare, "
".equal=(void*)", type_to_cord(member_t), "$equal, ");
goto got_methods;
case BoolType: goto got_methods;
default: break;
}
}
if (struct_->fields) {
env->code->funcs = CORD_all(env->code->funcs, compile_compare_method(env, ast),
compile_equals_method(env, ast), compile_hash_method(env, ast));
typeinfo = CORD_all(
typeinfo,
".compare=(void*)", full_name, "$compare, "
".equal=(void*)", full_name, "$equal, "
".hash=(void*)", full_name, "$hash");
}
got_methods:;
typeinfo = CORD_cat(typeinfo, "}}};\n");
env->code->typeinfos = CORD_all(env->code->typeinfos, typeinfo);
} else {
// If there are no fields, we can use an EmptyStructInfo typeinfo, which generates less code:
CORD typeinfo = CORD_asprintf("public const TypeInfo %r = {%zu, %zu, {.tag=EmptyStructInfo, .EmptyStructInfo.name=%r}};\n",
full_name, type_size(t), type_align(t), CORD_quoted(def->name));
env->code->typeinfos = CORD_all(env->code->typeinfos, typeinfo);
}
compile_namespace(env, def->name, def->namespace);
}
CORD compile_struct_header(env_t *env, ast_t *ast)
{
auto def = Match(ast, StructDef);
CORD full_name = CORD_cat(namespace_prefix(env, env->namespace), def->name);
CORD fields = CORD_EMPTY;
for (arg_ast_t *field = def->fields; field; field = field->next) {
type_t *field_t = get_arg_ast_type(env, field);
CORD type_code = compile_type(field_t);
fields = CORD_all(fields, type_code, " $", field->name, field_t->tag == BoolType ? ":1" : CORD_EMPTY, ";\n");
}
CORD struct_code = CORD_all("struct ", full_name, "_s {\n");
struct_code = CORD_all(struct_code, "};\n");
return CORD_all(
"typedef struct ", full_name, "_s ", full_name, "_t;\n",
"struct ", full_name, "_s {\n",
fields,
"};\n",
"typedef struct {\n",
full_name, "_t value;\n"
"Bool_t is_null:1;\n"
"} ", namespace_prefix(env, env->namespace), "$Optional", def->name, "_t;\n"
"extern const TypeInfo ", full_name, ";\n",
compile_namespace_header(env, def->name, def->namespace));
}
// vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1,\:0
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