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auto_str_methods.v
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auto_str_methods.v
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// Copyright (c) 2019-2023 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license that can be found in the LICENSE file.
module c
import v.ast
import v.util
import strings
const (
// BUG: this const is not released from the memory! use a const for now
// si_s_code = "0x" + int(StrIntpType.si_s).hex() // code for a simple string
si_s_code = '0xfe10'
)
fn (mut g Gen) gen_str_default(sym ast.TypeSymbol, styp string, str_fn_name string) {
$if trace_autostr ? {
eprintln('> gen_str_default: ${sym.name} | ${styp} | str_fn_name')
}
mut convertor := ''
mut typename_ := ''
if sym.parent_idx in ast.integer_type_idxs {
convertor = 'int'
typename_ = 'int'
} else if sym.parent_idx == ast.f32_type_idx {
convertor = 'float'
typename_ = 'f32'
} else if sym.parent_idx == ast.f64_type_idx {
convertor = 'double'
typename_ = 'f64'
} else if sym.parent_idx == ast.bool_type_idx {
convertor = 'bool'
typename_ = 'bool'
} else {
verror('could not generate string method for type `${styp}`')
}
g.definitions.writeln('string ${str_fn_name}(${styp} it); // auto')
g.auto_str_funcs.writeln('string ${str_fn_name}(${styp} it) {')
if convertor == 'bool' {
g.auto_str_funcs.writeln('\tstring tmp1 = string__plus(_SLIT("${styp}("), (${convertor})it ? _SLIT("true") : _SLIT("false"));')
} else {
g.auto_str_funcs.writeln('\tstring tmp1 = string__plus(_SLIT("${styp}("), tos3(${typename_}_str((${convertor})it).str));')
}
g.auto_str_funcs.writeln('\tstring tmp2 = string__plus(tmp1, _SLIT(")"));')
g.auto_str_funcs.writeln('\tstring_free(&tmp1);')
g.auto_str_funcs.writeln('\treturn tmp2;')
g.auto_str_funcs.writeln('}')
}
struct StrType {
styp string
mut:
typ ast.Type
}
fn (mut g Gen) get_str_fn(typ ast.Type) string {
$if trace_autostr ? {
eprintln('> get_str_fn: ${typ.debug()}')
}
mut unwrapped := if typ.has_flag(.option) {
g.unwrap_generic(typ).clear_flag(.variadic)
} else {
g.unwrap_generic(typ).set_nr_muls(0).clear_flag(.variadic)
}
if g.pref.nofloat {
if typ == ast.f32_type {
unwrapped = ast.u32_type
} else if typ == ast.f64_type {
unwrapped = ast.u64_type
}
}
styp := g.typ(unwrapped)
mut sym := g.table.sym(unwrapped)
mut str_fn_name := styp_to_str_fn_name(styp)
if mut sym.info is ast.Alias && !sym.has_method('str') {
if sym.info.is_import {
sym = g.table.sym(sym.info.parent_type)
str_fn_name = styp_to_str_fn_name(sym.name)
}
}
if sym.has_method_with_generic_parent('str') {
match mut sym.info {
ast.Struct, ast.SumType, ast.Interface {
str_fn_name = g.generic_fn_name(sym.info.concrete_types, str_fn_name)
}
else {}
}
}
g.str_types << StrType{
typ: unwrapped
styp: styp
}
return str_fn_name
}
fn (mut g Gen) final_gen_str(typ StrType) {
if typ in g.generated_str_fns {
return
}
$if trace_autostr ? {
eprintln('> final_gen_str: ${typ}')
}
g.generated_str_fns << typ
sym := g.table.sym(typ.typ)
if sym.has_method_with_generic_parent('str') && !(typ.typ.has_flag(.option)
|| typ.typ.has_flag(.result)) {
return
}
styp := typ.styp
str_fn_name := styp_to_str_fn_name(styp)
if str_fn_name in g.str_fn_names {
return
}
g.str_fn_names << str_fn_name
if typ.typ.has_flag(.option) {
g.gen_str_for_option(typ.typ, styp, str_fn_name)
return
}
if typ.typ.has_flag(.result) {
g.gen_str_for_result(typ.typ, styp, str_fn_name)
return
}
match sym.info {
ast.Alias {
if sym.info.is_import {
g.gen_str_default(sym, styp, str_fn_name)
} else {
g.gen_str_for_alias(sym.info, styp, str_fn_name)
}
}
ast.Array {
g.gen_str_for_array(sym.info, styp, str_fn_name)
}
ast.ArrayFixed {
g.gen_str_for_array_fixed(sym.info, styp, str_fn_name)
}
ast.Enum {
g.gen_str_for_enum(sym.info, styp, str_fn_name)
}
ast.FnType {
g.gen_str_for_fn_type(sym.info, styp, str_fn_name)
}
ast.Struct {
g.gen_str_for_struct(sym.info, sym.language, styp, g.table.type_to_str(typ.typ),
str_fn_name)
}
ast.Map {
g.gen_str_for_map(sym.info, styp, str_fn_name)
}
ast.MultiReturn {
g.gen_str_for_multi_return(sym.info, styp, str_fn_name)
}
ast.SumType {
g.gen_str_for_union_sum_type(sym.info, styp, g.table.type_to_str(typ.typ),
str_fn_name)
}
ast.Interface {
g.gen_str_for_interface(sym.info, styp, g.table.type_to_str(typ.typ), str_fn_name)
}
ast.Chan {
g.gen_str_for_chan(sym.info, styp, str_fn_name)
}
ast.Thread {
g.gen_str_for_thread(sym.info, styp, str_fn_name)
}
else {
if sym.name != 'nil' {
verror('could not generate string method `${str_fn_name}` for type `${styp}`')
}
}
}
}
fn (mut g Gen) gen_str_for_option(typ ast.Type, styp string, str_fn_name string) {
$if trace_autostr ? {
eprintln('> gen_str_for_option: ${typ.debug()} | ${styp} | ${str_fn_name}')
}
parent_type := typ.clear_flag(.option)
sym := g.table.sym(parent_type)
sym_has_str_method, _, _ := sym.str_method_info()
parent_str_fn_name := g.get_str_fn(parent_type)
g.definitions.writeln('string ${str_fn_name}(${styp} it); // auto')
g.auto_str_funcs.writeln('string ${str_fn_name}(${styp} it) { return indent_${str_fn_name}(it, 0); }')
g.definitions.writeln('string indent_${str_fn_name}(${styp} it, int indent_count); // auto')
g.auto_str_funcs.writeln('string indent_${str_fn_name}(${styp} it, int indent_count) {')
g.auto_str_funcs.writeln('\tstring res;')
g.auto_str_funcs.writeln('\tif (it.state == 0) {')
deref := if typ.is_ptr() { '**(${sym.cname}**)&' } else { '*(${sym.cname}*)' }
if sym.kind == .string {
if typ.nr_muls() > 1 {
g.auto_str_funcs.writeln('\t\tres = ptr_str(*(${sym.cname}**)&it.data);')
} else {
tmp_res := '${parent_str_fn_name}(${deref}it.data)'
g.auto_str_funcs.writeln('\t\tres = ${str_intp_sq(tmp_res)};')
}
} else if should_use_indent_func(sym.kind) && !sym_has_str_method {
g.auto_str_funcs.writeln('\t\tres = indent_${parent_str_fn_name}(${deref}it.data, indent_count);')
} else if sym.kind == .function {
g.auto_str_funcs.writeln('\t\tres = ${parent_str_fn_name}();')
} else {
if typ.nr_muls() > 1 {
g.auto_str_funcs.writeln('\t\tres = ptr_str(*(${sym.cname}**)&it.data);')
} else {
g.auto_str_funcs.writeln('\t\tres = ${parent_str_fn_name}(${deref}it.data);')
}
}
g.auto_str_funcs.writeln('\t\treturn ${str_intp_sub('Option(%%)', 'res')};')
g.auto_str_funcs.writeln('\t}')
g.auto_str_funcs.writeln('\treturn _SLIT("Option(none)");')
g.auto_str_funcs.writeln('}')
}
fn (mut g Gen) gen_str_for_result(typ ast.Type, styp string, str_fn_name string) {
$if trace_autostr ? {
eprintln('> gen_str_for_result: ${typ.debug()} | ${styp} | ${str_fn_name}')
}
parent_type := typ.clear_flag(.result)
sym := g.table.sym(parent_type)
sym_has_str_method, _, _ := sym.str_method_info()
parent_str_fn_name := g.get_str_fn(parent_type)
g.definitions.writeln('string ${str_fn_name}(${styp} it); // auto')
g.auto_str_funcs.writeln('string ${str_fn_name}(${styp} it) { return indent_${str_fn_name}(it, 0); }')
g.definitions.writeln('string indent_${str_fn_name}(${styp} it, int indent_count); // auto')
g.auto_str_funcs.writeln('string indent_${str_fn_name}(${styp} it, int indent_count) {')
g.auto_str_funcs.writeln('\tstring res;')
g.auto_str_funcs.writeln('\tif (!it.is_error) {')
if sym.kind == .string {
tmp_res := '${parent_str_fn_name}(*(${sym.cname}*)it.data)'
g.auto_str_funcs.writeln('\t\tres = ${str_intp_sq(tmp_res)};')
} else if should_use_indent_func(sym.kind) && !sym_has_str_method {
g.auto_str_funcs.writeln('\t\tres = indent_${parent_str_fn_name}(*(${sym.cname}*)it.data, indent_count);')
} else {
g.auto_str_funcs.writeln('\t\tres = ${parent_str_fn_name}(*(${sym.cname}*)it.data);')
}
g.auto_str_funcs.writeln('\t} else {')
tmp_str := str_intp_sub('error: %%', 'IError_str(it.err)')
g.auto_str_funcs.writeln('\t\tres = ${tmp_str};')
g.auto_str_funcs.writeln('\t}')
g.auto_str_funcs.writeln('\treturn ${str_intp_sub('Result(%%)', 'res')};')
g.auto_str_funcs.writeln('}')
}
fn (mut g Gen) gen_str_for_alias(info ast.Alias, styp string, str_fn_name string) {
parent_str_fn_name := g.get_str_fn(info.parent_type)
_, str_method_expects_ptr, _ := g.table.sym(info.parent_type).str_method_info()
$if trace_autostr ? {
eprintln('> gen_str_for_alias: ${parent_str_fn_name} | ${styp} | ${str_fn_name}')
}
mut clean_type_v_type_name := util.strip_main_name(styp.replace('__', '.'))
g.definitions.writeln('static string ${str_fn_name}(${styp} it); // auto')
g.auto_str_funcs.writeln('static string ${str_fn_name}(${styp} it) { return indent_${str_fn_name}(it, 0); }')
g.definitions.writeln('static string indent_${str_fn_name}(${styp} it, int indent_count); // auto')
g.auto_str_funcs.writeln('static string indent_${str_fn_name}(${styp} it, int indent_count) {')
g.auto_str_funcs.writeln('\tstring indents = string_repeat(_SLIT(" "), indent_count);')
if str_method_expects_ptr {
g.auto_str_funcs.writeln('\tstring tmp_ds = ${parent_str_fn_name}(&it);')
} else {
deref, _ := deref_kind(str_method_expects_ptr, info.parent_type.is_ptr(), info.parent_type)
g.auto_str_funcs.writeln('\tstring tmp_ds = ${parent_str_fn_name}(${deref}it);')
}
g.auto_str_funcs.writeln('\tstring res = str_intp(3, _MOV((StrIntpData[]){
{_SLIT0, ${c.si_s_code}, {.d_s = indents }},
{_SLIT("${clean_type_v_type_name}("), ${c.si_s_code}, {.d_s = tmp_ds }},
{_SLIT(")"), 0, {.d_c = 0 }}
}));')
g.auto_str_funcs.writeln('\tstring_free(&indents);')
g.auto_str_funcs.writeln('\tstring_free(&tmp_ds);')
g.auto_str_funcs.writeln('\treturn res;')
g.auto_str_funcs.writeln('}')
}
fn (mut g Gen) gen_str_for_multi_return(info ast.MultiReturn, styp string, str_fn_name string) {
$if trace_autostr ? {
eprintln('> gen_str_for_multi_return: ${info.types} | ${styp} | ${str_fn_name}')
}
g.definitions.writeln('static string ${str_fn_name}(${styp} a); // auto')
mut fn_builder := strings.new_builder(512)
fn_builder.writeln('static string ${str_fn_name}(${styp} a) {')
fn_builder.writeln('\tstrings__Builder sb = strings__new_builder(${info.types.len} * 10);')
fn_builder.writeln('\tstrings__Builder_write_string(&sb, _SLIT("("));')
for i, typ in info.types {
sym := g.table.sym(typ)
is_arg_ptr := typ.is_ptr()
sym_has_str_method, str_method_expects_ptr, _ := sym.str_method_info()
arg_str_fn_name := g.get_str_fn(typ)
if should_use_indent_func(sym.kind) && !sym_has_str_method {
fn_builder.writeln('\tstrings__Builder_write_string(&sb, ${arg_str_fn_name}(a.arg${i}));')
} else if sym.kind in [.f32, .f64] {
if sym.kind == .f32 {
tmp_val := str_intp_g32('a.arg${i}')
fn_builder.writeln('\tstrings__Builder_write_string(&sb, ${tmp_val});')
} else {
tmp_val := str_intp_g64('a.arg${i}')
fn_builder.writeln('\tstrings__Builder_write_string(&sb, ${tmp_val});')
}
} else if sym.kind == .string {
tmp_str := str_intp_sq('a.arg${i}')
fn_builder.writeln('\tstrings__Builder_write_string(&sb, ${tmp_str});')
} else if sym.kind == .function {
fn_builder.writeln('\tstrings__Builder_write_string(&sb, ${arg_str_fn_name}());')
} else {
deref, deref_label := deref_kind(str_method_expects_ptr, is_arg_ptr, typ)
fn_builder.writeln('\t\tstrings__Builder_write_string(&sb, _SLIT("${deref_label}"));')
fn_builder.writeln('\tstrings__Builder_write_string(&sb, ${arg_str_fn_name}( ${deref} a.arg${i}));')
}
if i != info.types.len - 1 {
fn_builder.writeln('\tstrings__Builder_write_string(&sb, _SLIT(", "));')
}
}
fn_builder.writeln('\tstrings__Builder_write_string(&sb, _SLIT(")"));')
fn_builder.writeln('\tstring res = strings__Builder_str(&sb);')
fn_builder.writeln('\tstrings__Builder_free(&sb);')
fn_builder.writeln('\treturn res;')
fn_builder.writeln('}')
g.auto_fn_definitions << fn_builder.str()
}
fn (mut g Gen) gen_str_for_enum(info ast.Enum, styp string, str_fn_name string) {
$if trace_autostr ? {
eprintln('> gen_str_for_enum: ${info} | ${styp} | ${str_fn_name}')
}
s := util.no_dots(styp)
g.definitions.writeln('static string ${str_fn_name}(${styp} it); // auto')
g.auto_str_funcs.writeln('static string ${str_fn_name}(${styp} it) { /* gen_str_for_enum */')
// Enums tagged with `[flag]` are special in that they can be a combination of enum values
if info.is_flag {
clean_name := util.strip_main_name(styp.replace('__', '.'))
g.auto_str_funcs.writeln('\tstring ret = _SLIT("${clean_name}{");')
g.auto_str_funcs.writeln('\tint first = 1;')
g.auto_str_funcs.writeln('\tu64 zit = (u64)it;')
for i, val in info.vals {
mask := u64(1) << i
g.auto_str_funcs.writeln('\tif (zit & 0x${mask:016x}U) {if (!first) {ret = string__plus(ret, _SLIT(" | "));} ret = string__plus(ret, _SLIT(".${val}")); first = 0;}')
}
g.auto_str_funcs.writeln('\tret = string__plus(ret, _SLIT("}"));')
g.auto_str_funcs.writeln('\treturn ret;')
} else {
g.auto_str_funcs.writeln('\tswitch(it) {')
// Only use the first multi value on the lookup
mut seen := []string{len: info.vals.len}
for val in info.vals {
if info.is_multi_allowed && val in seen {
continue
} else if info.is_multi_allowed {
seen << val
}
g.auto_str_funcs.writeln('\t\tcase ${s}__${val}: return _SLIT("${val}");')
}
g.auto_str_funcs.writeln('\t\tdefault: return _SLIT("unknown enum value");')
g.auto_str_funcs.writeln('\t}')
}
g.auto_str_funcs.writeln('}')
}
fn (mut g Gen) gen_str_for_interface(info ast.Interface, styp string, typ_str string, str_fn_name string) {
$if trace_autostr ? {
eprintln('> gen_str_for_interface: ${info.types} | ${styp} | ${str_fn_name}')
}
// _str() functions should have a single argument, the indenting ones take 2:
g.definitions.writeln('static string ${str_fn_name}(${styp} x); // auto')
g.auto_str_funcs.writeln('static string ${str_fn_name}(${styp} x) { return indent_${str_fn_name}(x, 0); }')
g.definitions.writeln('static string indent_${str_fn_name}(${styp} x, int indent_count); // auto')
mut fn_builder := strings.new_builder(512)
clean_interface_v_type_name := util.strip_main_name(typ_str)
fn_builder.writeln('static string indent_${str_fn_name}(${styp} x, int indent_count) { /* gen_str_for_interface */')
for typ in info.types {
sub_sym := g.table.sym(ast.mktyp(typ))
mut func_name := g.get_str_fn(typ)
sym_has_str_method, str_method_expects_ptr, _ := sub_sym.str_method_info()
if should_use_indent_func(sub_sym.kind) && !sym_has_str_method {
func_name = 'indent_${func_name}'
}
// str_intp
deref := if sym_has_str_method && str_method_expects_ptr { ' ' } else { '*' }
if typ == ast.string_type {
mut val := '${func_name}(${deref}(${sub_sym.cname}*)x._${sub_sym.cname}'
if should_use_indent_func(sub_sym.kind) && !sym_has_str_method {
val += ', indent_count'
}
val += ')'
res := 'str_intp(2, _MOV((StrIntpData[]){
{_SLIT("${clean_interface_v_type_name}(\'"), ${c.si_s_code}, {.d_s = ${val}}},
{_SLIT("\')"), 0, {.d_c = 0 }}
}))'
fn_builder.write_string('\tif (x._typ == _${styp}_${sub_sym.cname}_index)')
fn_builder.write_string(' return ${res};')
} else {
mut val := '${func_name}(${deref}(${sub_sym.cname}*)x._${sub_sym.cname}'
if should_use_indent_func(sub_sym.kind) && !sym_has_str_method {
val += ', indent_count'
}
val += ')'
res := 'str_intp(2, _MOV((StrIntpData[]){
{_SLIT("${clean_interface_v_type_name}("), ${c.si_s_code}, {.d_s = ${val}}},
{_SLIT(")"), 0, {.d_c = 0 }}
}))'
fn_builder.write_string('\tif (x._typ == _${styp}_${sub_sym.cname}_index)')
fn_builder.write_string(' return ${res};\n')
}
}
fn_builder.writeln('\treturn _SLIT("unknown interface value");')
fn_builder.writeln('}')
g.auto_fn_definitions << fn_builder.str()
}
fn (mut g Gen) gen_str_for_union_sum_type(info ast.SumType, styp string, typ_str string, str_fn_name string) {
$if trace_autostr ? {
eprintln('> gen_str_for_union_sum_type: ${info.variants} | ${styp} | ${str_fn_name}')
}
// _str() functions should have a single argument, the indenting ones take 2:
g.definitions.writeln('static string ${str_fn_name}(${styp} x); // auto')
g.auto_str_funcs.writeln('static string ${str_fn_name}(${styp} x) { return indent_${str_fn_name}(x, 0); }')
g.definitions.writeln('static string indent_${str_fn_name}(${styp} x, int indent_count); // auto')
mut fn_builder := strings.new_builder(512)
fn_builder.writeln('static string indent_${str_fn_name}(${styp} x, int indent_count) {')
mut clean_sum_type_v_type_name := ''
if info.is_anon {
variant_names := info.variants.map(util.strip_main_name(g.table.sym(it).name))
clean_sum_type_v_type_name = '${variant_names.join('|')}'
} else {
clean_sum_type_v_type_name = util.strip_main_name(typ_str)
}
fn_builder.writeln('\tswitch(x._typ) {')
for typ in info.variants {
typ_name := g.typ(typ)
mut func_name := g.get_str_fn(typ)
sym := g.table.sym(typ)
sym_has_str_method, str_method_expects_ptr, _ := sym.str_method_info()
deref := if sym_has_str_method && str_method_expects_ptr { ' ' } else { '*' }
if should_use_indent_func(sym.kind) && !sym_has_str_method {
func_name = 'indent_${func_name}'
}
// str_intp
if typ == ast.string_type {
mut val := '${func_name}(${deref}(${typ_name}*)x._${sym.cname}'
if should_use_indent_func(sym.kind) && !sym_has_str_method {
val += ', indent_count'
}
val += ')'
res := 'str_intp(2, _MOV((StrIntpData[]){
{_SLIT("${clean_sum_type_v_type_name}(\'"), ${c.si_s_code}, {.d_s = ${val}}},
{_SLIT("\')"), 0, {.d_c = 0 }}
}))'
fn_builder.write_string('\t\tcase ${typ.idx()}: return ${res};\n')
} else {
mut val := '${func_name}(${deref}(${typ_name}*)x._${sym.cname}'
if should_use_indent_func(sym.kind) && !sym_has_str_method {
val += ', indent_count'
}
val += ')'
res := 'str_intp(2, _MOV((StrIntpData[]){
{_SLIT("${clean_sum_type_v_type_name}("), ${c.si_s_code}, {.d_s = ${val}}},
{_SLIT(")"), 0, {.d_c = 0 }}
}))'
fn_builder.write_string('\t\tcase ${typ.idx()}: return ${res};\n')
}
}
fn_builder.writeln('\t\tdefault: return _SLIT("unknown sum type value");')
fn_builder.writeln('\t}')
fn_builder.writeln('}')
g.auto_fn_definitions << fn_builder.str()
}
fn (mut g Gen) fn_decl_str(info ast.FnType) string {
mut fn_str := 'fn ('
for i, arg in info.func.params {
if arg.is_mut {
fn_str += 'mut '
}
if i > 0 {
fn_str += ', '
}
fn_str += util.strip_main_name(g.table.get_type_name(g.unwrap_generic(arg.typ)))
}
fn_str += ')'
if info.func.return_type == ast.ovoid_type {
fn_str += ' ?'
} else if info.func.return_type == ast.rvoid_type {
fn_str += ' !'
} else if info.func.return_type != ast.void_type {
x := util.strip_main_name(g.table.get_type_name(g.unwrap_generic(info.func.return_type)))
if info.func.return_type.has_flag(.option) {
fn_str += ' ?${x}'
} else if info.func.return_type.has_flag(.result) {
fn_str += ' !${x}'
} else {
fn_str += ' ${x}'
}
}
return fn_str
}
fn (mut g Gen) gen_str_for_fn_type(info ast.FnType, styp string, str_fn_name string) {
$if trace_autostr ? {
eprintln('> gen_str_for_fn_type: ${info.func.name} | ${styp} | ${str_fn_name}')
}
g.definitions.writeln('static string ${str_fn_name}(); // auto')
g.auto_str_funcs.writeln('static string ${str_fn_name}() { return _SLIT("${g.fn_decl_str(info)}");}')
}
fn (mut g Gen) gen_str_for_chan(info ast.Chan, styp string, str_fn_name string) {
$if trace_autostr ? {
eprintln('> gen_str_for_chan: ${info.elem_type.debug()} | ${styp} | ${str_fn_name}')
}
elem_type_name := util.strip_main_name(g.table.get_type_name(g.unwrap_generic(info.elem_type)))
g.definitions.writeln('static string ${str_fn_name}(${styp} x); // auto')
g.auto_str_funcs.writeln('static string ${str_fn_name}(${styp} x) { return sync__Channel_auto_str(x, _SLIT("${elem_type_name}")); }')
}
fn (mut g Gen) gen_str_for_thread(info ast.Thread, styp string, str_fn_name string) {
$if trace_autostr ? {
eprintln('> gen_str_for_thread: ${info.return_type.debug()} | ${styp} | ${str_fn_name}')
}
ret_type_name := util.strip_main_name(g.table.get_type_name(info.return_type))
g.definitions.writeln('static string ${str_fn_name}(${styp} _); // auto}')
g.auto_str_funcs.writeln('static string ${str_fn_name}(${styp} _) { return _SLIT("thread(${ret_type_name})");}')
}
[inline]
fn styp_to_str_fn_name(styp string) string {
return styp.replace_each(['*', '', '.', '__', ' ', '__']) + '_str'
}
// deref_kind returns deref, deref_label
fn deref_kind(str_method_expects_ptr bool, is_elem_ptr bool, typ ast.Type) (string, string) {
if typ.has_flag(.option) {
return '', ''
}
if str_method_expects_ptr != is_elem_ptr {
if is_elem_ptr {
return '*'.repeat(typ.nr_muls()), '&'.repeat(typ.nr_muls())
} else {
return '&', ''
}
}
return '', ''
}
fn (mut g Gen) gen_str_for_array(info ast.Array, styp string, str_fn_name string) {
$if trace_autostr ? {
eprintln('> gen_str_for_array: ${info.elem_type.debug()} | ${styp} | ${str_fn_name}')
}
mut typ := info.elem_type
mut sym := g.table.sym(info.elem_type)
if mut sym.info is ast.Alias {
typ = sym.info.parent_type
sym = g.table.sym(typ)
}
field_styp := g.typ(typ)
is_elem_ptr := typ.is_ptr()
sym_has_str_method, str_method_expects_ptr, _ := sym.str_method_info()
elem_str_fn_name := g.get_str_fn(typ)
g.definitions.writeln('static string ${str_fn_name}(${styp} a); // auto')
g.auto_str_funcs.writeln('static string ${str_fn_name}(${styp} a) { return indent_${str_fn_name}(a, 0);}')
g.definitions.writeln('static string indent_${str_fn_name}(${styp} a, int indent_count); // auto')
g.auto_str_funcs.writeln('static string indent_${str_fn_name}(${styp} a, int indent_count) {')
g.auto_str_funcs.writeln('\tstrings__Builder sb = strings__new_builder(a.len * 10);')
g.auto_str_funcs.writeln('\tstrings__Builder_write_string(&sb, _SLIT("["));')
g.auto_str_funcs.writeln('\tfor (int i = 0; i < a.len; ++i) {')
if sym.kind == .function {
g.auto_str_funcs.writeln('\t\tstring x = ${elem_str_fn_name}();')
} else {
if sym.kind == .array_fixed {
g.auto_str_funcs.writeln('\t\t${field_styp} it;')
g.auto_str_funcs.writeln('\t\tmemcpy(*(${field_styp}*)it, (byte*)array_get(a, i), sizeof(${field_styp}));')
} else {
g.auto_str_funcs.writeln('\t\t${field_styp} it = *(${field_styp}*)array_get(a, i);')
}
if should_use_indent_func(sym.kind) && !sym_has_str_method {
if is_elem_ptr {
deref, deref_label := deref_kind(str_method_expects_ptr, is_elem_ptr,
typ)
g.auto_str_funcs.writeln('\t\tstring x = _SLIT("nil");')
if !typ.has_flag(.option) {
g.auto_str_funcs.writeln('\t\tif (it != 0) {')
}
g.auto_str_funcs.writeln('\t\t\tstrings__Builder_write_string(&sb, _SLIT("${deref_label}"));')
g.auto_str_funcs.writeln('\t\t\tx = ${elem_str_fn_name}(${deref}it);')
if !typ.has_flag(.option) {
g.auto_str_funcs.writeln('\t\t}')
}
} else {
g.auto_str_funcs.writeln('\t\tstring x = indent_${elem_str_fn_name}(it, indent_count);')
}
} else if sym.kind in [.f32, .f64] {
if sym.kind == .f32 {
g.auto_str_funcs.writeln('\t\tstring x = ${str_intp_g32('it')};')
} else {
g.auto_str_funcs.writeln('\t\tstring x = ${str_intp_g64('it')};')
}
} else if sym.kind == .rune {
// Rune are managed at this level as strings
g.auto_str_funcs.writeln('\t\tstring x = str_intp(2, _MOV((StrIntpData[]){{_SLIT("\`"), ${c.si_s_code}, {.d_s = ${elem_str_fn_name}(it) }}, {_SLIT("\`"), 0, {.d_c = 0 }}}));\n')
} else if sym.kind == .string {
if typ.has_flag(.option) {
func := g.get_str_fn(typ)
g.auto_str_funcs.writeln('\t\tstring x = ${func}(it);\n')
} else if is_elem_ptr {
g.auto_str_funcs.writeln('\t\tstring x = str_intp(2, _MOV((StrIntpData[]){{_SLIT("&\'"), ${c.si_s_code}, {.d_s = *it }}, {_SLIT("\'"), 0, {.d_c = 0 }}}));\n')
} else {
g.auto_str_funcs.writeln('\t\tstring x = str_intp(2, _MOV((StrIntpData[]){{_SLIT("\'"), ${c.si_s_code}, {.d_s = it }}, {_SLIT("\'"), 0, {.d_c = 0 }}}));\n')
}
} else {
// There is a custom .str() method, so use it.
// Note: we need to take account of whether the user has defined
// `fn (x T) str() {` or `fn (x &T) str() {`, and convert accordingly
deref, deref_label := deref_kind(str_method_expects_ptr, is_elem_ptr, typ)
if is_elem_ptr {
g.auto_str_funcs.writeln('\t\tstring x = _SLIT("nil");')
if !typ.has_flag(.option) {
g.auto_str_funcs.writeln('\t\tif (it != 0) {')
}
g.auto_str_funcs.writeln('\t\t\tstrings__Builder_write_string(&sb, _SLIT("${deref_label}"));')
g.auto_str_funcs.writeln('\t\t\tx = ${elem_str_fn_name}(${deref}it);')
if !typ.has_flag(.option) {
g.auto_str_funcs.writeln('\t\t}')
}
} else {
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, _SLIT("${deref_label}"));')
g.auto_str_funcs.writeln('\t\tstring x = ${elem_str_fn_name}(${deref}it);')
}
}
}
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, x);')
if g.is_autofree && typ != ast.bool_type {
// no need to free "true"/"false" literals
g.auto_str_funcs.writeln('\t\tstring_free(&x);')
}
g.auto_str_funcs.writeln('\t\tif (i < a.len-1) {')
g.auto_str_funcs.writeln('\t\t\tstrings__Builder_write_string(&sb, _SLIT(", "));')
g.auto_str_funcs.writeln('\t\t}')
g.auto_str_funcs.writeln('\t}')
g.auto_str_funcs.writeln('\tstrings__Builder_write_string(&sb, _SLIT("]"));')
g.auto_str_funcs.writeln('\tstring res = strings__Builder_str(&sb);')
g.auto_str_funcs.writeln('\tstrings__Builder_free(&sb);')
g.auto_str_funcs.writeln('\treturn res;')
g.auto_str_funcs.writeln('}')
}
fn (mut g Gen) gen_str_for_array_fixed(info ast.ArrayFixed, styp string, str_fn_name string) {
$if trace_autostr ? {
eprintln('> gen_str_for_array_fixed: ${info.elem_type.debug()} | ${styp} | ${str_fn_name}')
}
mut typ := info.elem_type
mut sym := g.table.sym(info.elem_type)
if mut sym.info is ast.Alias {
typ = sym.info.parent_type
sym = g.table.sym(typ)
}
is_elem_ptr := typ.is_ptr()
sym_has_str_method, str_method_expects_ptr, _ := sym.str_method_info()
elem_str_fn_name := g.get_str_fn(typ)
def_arg := if info.is_fn_ret { '${g.typ(typ)} a[${info.size}]' } else { '${styp} a' }
g.definitions.writeln('static string ${str_fn_name}(); // auto')
g.auto_str_funcs.writeln('static string ${str_fn_name}(${def_arg}) { return indent_${str_fn_name}(a, 0);}')
g.definitions.writeln('static string indent_${str_fn_name}(${def_arg}, int indent_count); // auto')
g.auto_str_funcs.writeln('static string indent_${str_fn_name}(${def_arg}, int indent_count) {')
g.auto_str_funcs.writeln('\tstrings__Builder sb = strings__new_builder(${info.size} * 10);')
g.auto_str_funcs.writeln('\tstrings__Builder_write_string(&sb, _SLIT("["));')
g.auto_str_funcs.writeln('\tfor (int i = 0; i < ${info.size}; ++i) {')
if sym.kind == .function {
g.auto_str_funcs.writeln('\t\tstring x = ${elem_str_fn_name}();')
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, x);')
} else {
deref, deref_label := deref_kind(str_method_expects_ptr, is_elem_ptr, typ)
if should_use_indent_func(sym.kind) && !sym_has_str_method {
if is_elem_ptr {
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, _SLIT("${deref_label}"));')
g.auto_str_funcs.writeln('\t\tif ( 0 == a[i] ) {')
g.auto_str_funcs.writeln('\t\t\tstrings__Builder_write_string(&sb, _SLIT("0"));')
g.auto_str_funcs.writeln('\t\t}else{')
g.auto_str_funcs.writeln('\t\t\tstrings__Builder_write_string(&sb, ${elem_str_fn_name}( ${deref} a[i]) );')
g.auto_str_funcs.writeln('\t\t}')
} else {
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, ${elem_str_fn_name}( ${deref} a[i]) );')
}
} else if sym.kind in [.f32, .f64] {
if sym.kind == .f32 {
field_str := str_intp_g32('a[i]')
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, ${field_str} );')
} else {
field_str := str_intp_g64('a[i]')
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, ${field_str} );')
}
} else if sym.kind == .string {
field_str := str_intp_sq('a[i]')
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, ${field_str});')
} else if sym.kind == .rune {
tmp_str := str_intp_rune('${elem_str_fn_name}( ${deref} a[i])')
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, ${tmp_str});')
} else {
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, ${elem_str_fn_name}( ${deref} a[i]));')
}
}
g.auto_str_funcs.writeln('\t\tif (i < ${info.size - 1}) {')
g.auto_str_funcs.writeln('\t\t\tstrings__Builder_write_string(&sb, _SLIT(", "));')
g.auto_str_funcs.writeln('\t\t}')
g.auto_str_funcs.writeln('\t}')
g.auto_str_funcs.writeln('\tstrings__Builder_write_string(&sb, _SLIT("]"));')
g.auto_str_funcs.writeln('\tstring res = strings__Builder_str(&sb);')
g.auto_str_funcs.writeln('\tstrings__Builder_free(&sb);')
g.auto_str_funcs.writeln('\treturn res;')
g.auto_str_funcs.writeln('}')
}
fn (mut g Gen) gen_str_for_map(info ast.Map, styp string, str_fn_name string) {
$if trace_autostr ? {
eprintln('> gen_str_for_map: ${info.key_type.debug()} -> ${info.value_type.debug()} | ${styp} | ${str_fn_name}')
}
mut key_typ := info.key_type
mut key_sym := g.table.sym(key_typ)
if mut key_sym.info is ast.Alias {
key_typ = key_sym.info.parent_type
key_sym = g.table.sym(key_typ)
}
key_styp := g.typ(key_typ)
key_str_fn_name := key_styp.replace('*', '') + '_str'
if !key_sym.has_method('str') {
g.get_str_fn(key_typ)
}
mut val_typ := info.value_type
mut val_sym := g.table.sym(val_typ)
if mut val_sym.info is ast.Alias {
val_typ = val_sym.info.parent_type
val_sym = g.table.sym(val_typ)
}
val_styp := g.typ(val_typ)
mut elem_str_fn_name := val_styp.replace('*', '') + '_str'
mut receiver_is_ptr := false
fn_str := val_sym.find_method_with_generic_parent('str') or { ast.Fn{} }
if fn_str.name == 'str' {
receiver_is_ptr = fn_str.receiver_type.is_ptr()
match mut val_sym.info {
ast.Struct, ast.Interface, ast.SumType {
if val_sym.info.generic_types.len > 0 {
elem_str_fn_name = g.generic_fn_name(val_sym.info.concrete_types,
elem_str_fn_name)
}
}
else {}
}
} else {
g.get_str_fn(val_typ)
}
g.definitions.writeln('static string ${str_fn_name}(${styp} m); // auto')
g.auto_str_funcs.writeln('static string ${str_fn_name}(${styp} m) { return indent_${str_fn_name}(m, 0);}')
g.definitions.writeln('static string indent_${str_fn_name}(${styp} m, int indent_count); // auto')
g.auto_str_funcs.writeln('static string indent_${str_fn_name}(${styp} m, int indent_count) { /* gen_str_for_map */')
g.auto_str_funcs.writeln('\tstrings__Builder sb = strings__new_builder(m.key_values.len*10);')
g.auto_str_funcs.writeln('\tstrings__Builder_write_string(&sb, _SLIT("{"));')
g.auto_str_funcs.writeln('\tbool is_first = true;')
g.auto_str_funcs.writeln('\tfor (int i = 0; i < m.key_values.len; ++i) {')
g.auto_str_funcs.writeln('\t\tif (!DenseArray_has_index(&m.key_values, i)) { continue; }')
g.auto_str_funcs.writeln('\t\telse if (!is_first) { strings__Builder_write_string(&sb, _SLIT(", ")); }')
if key_sym.kind == .string {
g.auto_str_funcs.writeln('\t\tstring key = *(string*)DenseArray_key(&m.key_values, i);')
} else {
g.auto_str_funcs.writeln('\t\t${key_styp} key = *(${key_styp}*)DenseArray_key(&m.key_values, i);')
}
if key_sym.kind == .string {
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, ${str_intp_sq('key')});')
} else if key_sym.kind == .rune {
tmp_str := str_intp_rune('${key_str_fn_name}(key)')
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, ${tmp_str});')
} else {
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, ${key_str_fn_name}(key));')
}
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, _SLIT(": "));')
if val_sym.kind == .function {
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, ${elem_str_fn_name}());')
} else if val_sym.kind == .string {
if val_typ.has_flag(.option) {
func := g.get_str_fn(val_typ)
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, ${func}(*(${val_styp}*)DenseArray_value(&m.key_values, i)));')
} else {
tmp_str := str_intp_sq('*(${val_styp}*)DenseArray_value(&m.key_values, i)')
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, ${tmp_str});')
}
} else if should_use_indent_func(val_sym.kind) && fn_str.name != 'str' {
ptr_str := '*'.repeat(val_typ.nr_muls())
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, indent_${elem_str_fn_name}(*${ptr_str}(${val_styp}*)DenseArray_value(&m.key_values, i), indent_count));')
} else if val_sym.kind in [.f32, .f64] {
tmp_val := '*(${val_styp}*)DenseArray_value(&m.key_values, i)'
if val_typ.has_flag(.option) {
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, ${g.get_str_fn(val_typ)}(*(${val_styp}*)DenseArray_value(&m.key_values, i)));')
} else {
if val_sym.kind == .f32 {
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, ${str_intp_g32(tmp_val)});')
} else {
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, ${str_intp_g64(tmp_val)});')
}
}
} else if val_sym.kind == .rune {
tmp_str := str_intp_rune('${elem_str_fn_name}(*(${val_styp}*)DenseArray_value(&m.key_values, i))')
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, ${tmp_str});')
} else {
ptr_str := '*'.repeat(if receiver_is_ptr { val_typ.nr_muls() - 1 } else { val_typ.nr_muls() })
if val_typ.has_flag(.option) {
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, ${g.get_str_fn(val_typ)}(*${ptr_str}(${val_styp}*)DenseArray_value(&m.key_values, i)));')
} else {
g.auto_str_funcs.writeln('\t\tstrings__Builder_write_string(&sb, ${elem_str_fn_name}(*${ptr_str}(${val_styp}*)DenseArray_value(&m.key_values, i)));')
}
}
g.auto_str_funcs.writeln('\t\tis_first = false;')
g.auto_str_funcs.writeln('\t}')
g.auto_str_funcs.writeln('\tstrings__Builder_write_string(&sb, _SLIT("}"));')
g.auto_str_funcs.writeln('\tstring res = strings__Builder_str(&sb);')
g.auto_str_funcs.writeln('\tstrings__Builder_free(&sb);')
g.auto_str_funcs.writeln('\treturn res;')
g.auto_str_funcs.writeln('}')
}
fn (g &Gen) type_to_fmt(typ ast.Type) StrIntpType {
if typ == ast.u8_type_idx {
return .si_u8
}
if typ == ast.char_type_idx {
return .si_c
}
if typ in ast.voidptr_types || typ == ast.nil_type || typ in ast.byteptr_types {
return .si_p
}
if typ in ast.charptr_types {
// return '%C\\000' // a C string
return .si_s
}
typ_nr_muls := typ.nr_muls()
if typ_nr_muls > 1 {
return .si_p
}
sym := g.table.sym(typ)
if typ.is_int_valptr() || typ.is_float_valptr() {
return .si_s
} else if sym.kind in [.struct_, .array, .array_fixed, .map, .bool, .enum_, .interface_,
.sum_type, .function, .alias, .chan] {
return .si_s
} else if sym.kind == .string {
return .si_s
// return "'%.*s\\000'"
} else if sym.kind in [.f32, .f64] {
if sym.kind == .f32 {
return .si_g32
}
return .si_g64
} else if sym.kind == .int {
return .si_i32
} else if sym.kind == .u32 {
return .si_u32
} else if sym.kind == .u64 {
return .si_u64
} else if sym.kind == .i64 {
return .si_i64
} else if sym.kind == .usize {
return .si_u64
} else if sym.kind == .isize {
return .si_i64
}
return .si_i32
}
fn (mut g Gen) gen_str_for_struct(info ast.Struct, lang ast.Language, styp string, typ_str string, str_fn_name string) {
$if trace_autostr ? {
eprintln('> gen_str_for_struct: ${info.parent_type.debug()} | ${styp} | ${str_fn_name}')
}
// _str() functions should have a single argument, the indenting ones take 2:
g.definitions.writeln('static string ${str_fn_name}(${styp} it); // auto')
g.auto_str_funcs.writeln('static string ${str_fn_name}(${styp} it) { return indent_${str_fn_name}(it, 0);}')
g.definitions.writeln('static string indent_${str_fn_name}(${styp} it, int indent_count); // auto')
mut fn_builder := strings.new_builder(512)
defer {
g.auto_fn_definitions << fn_builder.str()
}
fn_builder.writeln('static string indent_${str_fn_name}(${styp} it, int indent_count) {')
clean_struct_v_type_name := if info.is_anon { 'struct ' } else { util.strip_main_name(typ_str) }
// generate ident / indent length = 4 spaces
if info.fields.len == 0 {
fn_builder.writeln('\treturn _SLIT("${clean_struct_v_type_name}{}");')
fn_builder.writeln('}')
return
}
fn_builder.writeln('\tstring indents = string_repeat(_SLIT(" "), indent_count);')
mut fn_body_surrounder := util.new_surrounder(info.fields.len)
mut fn_body := strings.new_builder(info.fields.len * 256)
defer {
fn_body_surrounder.builder_write_befores(mut fn_builder)
fn_builder << fn_body
fn_body_surrounder.builder_write_afters(mut fn_builder)
fn_builder.writeln('\tstring_free(&indents);')
fn_builder.writeln('\treturn res;')
fn_builder.writeln('}')
}
// find `[str: skip]` fields
mut field_skips := []int{}
for i, field in info.fields {
if attr := field.attrs.find_first('str') {
if attr.arg == 'skip' {
field_skips << i
}
}
}
fn_body.writeln('\tstring res = str_intp( ${(info.fields.len - field_skips.len) * 4 + 3}, _MOV((StrIntpData[]){')
fn_body.writeln('\t\t{_SLIT("${clean_struct_v_type_name}{\\n"), 0, {.d_c=0}},')
allow_circular := info.attrs.any(it.name == 'autostr' && it.arg == 'allowrecurse')
mut is_first := true
for i, field in info.fields {
// Skip `str:skip` fields
if i in field_skips {
continue
}
ftyp_noshared := if field.typ.has_flag(.shared_f) {
field.typ.deref().clear_flag(.shared_f)
} else {
field.typ
}
mut ptr_amp := if ftyp_noshared.is_ptr() {
'&'
} else {
''
}
base_fmt := g.type_to_fmt(g.unwrap_generic(field.typ))
is_opt_field := field.typ.has_flag(.option)
// manage prefix and quote symbol for the filed
mut quote_str := ''
mut prefix := ''
sym := g.table.sym(g.unwrap_generic(field.typ))
if !is_opt_field {
if sym.kind == .string {
quote_str = "'"
} else if field.typ in ast.charptr_types {
quote_str = '\\"'
prefix = 'C'
}
}
if is_first {
// first field doesn't need \n
fn_body.write_string('\t\t{_SLIT0, ${c.si_s_code}, {.d_s=indents}}, {_SLIT(" ${field.name}: ${ptr_amp}${prefix}"), 0, {.d_c=0}}, ')
is_first = false
} else {
fn_body.write_string('\t\t{_SLIT("\\n"), ${c.si_s_code}, {.d_s=indents}}, {_SLIT(" ${field.name}: ${ptr_amp}${prefix}"), 0, {.d_c=0}}, ')
}
// custom methods management
sym_has_str_method, str_method_expects_ptr, _ := sym.str_method_info()
sftyp := g.typ(ftyp_noshared)
mut field_styp := sftyp.replace('*', '')
field_styp_fn_name := if sym_has_str_method {
mut field_fn_name := if ftyp_noshared.has_flag(.option) {
g.get_str_fn(ftyp_noshared)
} else {
left_cc_type := g.cc_type(ftyp_noshared, false)
left_fn_name := util.no_dots(left_cc_type)
'${left_fn_name}_str'
}
if sym.info is ast.Struct {
field_fn_name = g.generic_fn_name(sym.info.concrete_types, field_fn_name)
}
field_fn_name
} else {
g.get_str_fn(ftyp_noshared)
}
// with floats we use always the g representation:
if is_opt_field {
fn_body.write_string('{_SLIT("${quote_str}"), ${c.si_s_code}, {.d_s=')
} else if sym.kind !in [.f32, .f64] {
fn_body.write_string('{_SLIT("${quote_str}"), ${int(base_fmt)}, {.${data_str(base_fmt)}=')
} else {
g_fmt := '0x' + (u32(base_fmt) | u32(0x7F) << 9).hex()
fn_body.write_string('{_SLIT("${quote_str}"), ${g_fmt}, {.${data_str(base_fmt)}=')
}
mut funcprefix := ''
mut func, mut caller_should_free := struct_auto_str_func(sym, lang, field.typ,
field_styp_fn_name, field.name, sym_has_str_method, str_method_expects_ptr)
ftyp_nr_muls := field.typ.nr_muls()
field_name := if lang == .c { field.name } else { c_name(field.name) }
if ftyp_nr_muls > 1 || field.typ in ast.cptr_types {
if is_opt_field {
} else {
func = '(voidptr) it.${field.name}'
caller_should_free = false
}