mirror of
https://github.com/vlang/v.git
synced 2023-08-10 21:13:21 +03:00
677 lines
18 KiB
V
677 lines
18 KiB
V
module compiler
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import strings
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const (
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dot_ptr = '->'
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)
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/*
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fn (p mut Parser) gen_or_else(pos int) string {
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}
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*/
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// returns the type of the new variable
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fn (p mut Parser) gen_var_decl(name string, is_static bool) string {
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// Generate expression to tmp because we need its type first
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// `[typ] [name] = bool_expression();`
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pos := p.cgen.add_placeholder()
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p.is_var_decl = true
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mut typ := p.bool_expression()
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p.is_var_decl = false
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if typ.starts_with('...') { typ = typ[3..] }
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//p.gen('/*after expr*/')
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// Option check ? or {
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or_else := p.tok == .key_orelse
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if or_else {
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return p.gen_handle_option_or_else(typ, name, pos)
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}
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gen_name := p.table.var_cgen_name(name)
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mut nt_gen := p.table.cgen_name_type_pair(gen_name, typ)
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// `foo := C.Foo{}` => `Foo foo;`
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if !p.is_empty_c_struct_init && !typ.starts_with('['){
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nt_gen += '='
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} else if typ.starts_with('[') && typ[ typ.len-1 ] != `*` {
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// a fixed_array initializer, like `v := [1.1, 2.2]!!`
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// ... should translate to the following in C `f32 v[2] = {1.1, 2.2};`
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initializer := p.cgen.cur_line[pos..]
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if initializer.len > 0 {
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p.cgen.resetln(' = {' + initializer.all_after('{') )
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} else if initializer.len == 0 {
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p.cgen.resetln(' = { 0 }')
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}
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}
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if is_static {
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nt_gen = 'static $nt_gen'
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}
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p.cgen.set_placeholder(pos, nt_gen)
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return typ
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}
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fn (p mut Parser) gen_fn_decl(f Fn, typ, str_args string) {
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dll_export_linkage := if p.pref.ccompiler == 'msvc' && p.attr == 'live' && p.pref.is_so {
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'__declspec(dllexport) '
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} else if p.attr == 'inline' {
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'static inline '
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} else {
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''
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}
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fn_name_cgen := p.table.fn_gen_name(f)
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//str_args := f.str_args(p.table)
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p.genln('$dll_export_linkage$typ $fn_name_cgen($str_args) {')
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}
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// blank identifer assignment `_ = 111`
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fn (p mut Parser) gen_blank_identifier_assign() {
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assign_error_tok_idx := p.token_idx
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p.check_name()
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p.check_space(.assign)
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is_indexer := p.peek() == .lsbr
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is_fn_call, next_expr := p.is_expr_fn_call(p.token_idx)
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pos := p.cgen.add_placeholder()
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p.is_var_decl = true
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typ := p.bool_expression()
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if typ == 'void' {
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p.error_with_token_index('$next_expr() $err_used_as_value', p.token_idx-2)
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}
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p.is_var_decl = false
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if !is_indexer && !is_fn_call {
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p.error_with_token_index('assigning `$next_expr` to `_` is redundant', assign_error_tok_idx)
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}
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// handle or
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if p.tok == .key_orelse {
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p.gen_handle_option_or_else(typ, '', pos)
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} else {
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if is_fn_call {
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p.gen(';')
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} else {
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p.cgen.resetln('{$typ _ = $p.cgen.cur_line;}')
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}
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}
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}
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fn (p mut Parser) gen_handle_option_or_else(_typ, name string, fn_call_ph int) string {
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mut typ := _typ
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if !typ.starts_with('Option_') {
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p.error('`or` block cannot be applied to non-optional type')
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}
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is_assign := name.len > 0
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tmp := p.get_tmp()
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p.cgen.set_placeholder(fn_call_ph, '$typ $tmp = ')
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typ = typ[7..]
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p.genln(';')
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or_tok_idx := p.token_idx
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p.check(.key_orelse)
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p.check(.lcbr)
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p.register_var(Var {
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name: 'err'
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typ: 'string'
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is_mut: false
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is_used: true
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})
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p.register_var(Var {
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name: 'errcode'
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typ: 'int'
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is_mut: false
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is_used: true
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})
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if is_assign && !name.contains('.') { // don't initialize struct fields
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p.genln('$typ $name;')
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}
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p.genln('if (!$tmp .ok) {')
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p.genln('string err = $tmp . error;')
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p.genln('int errcode = $tmp . ecode;')
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last_ph := p.cgen.add_placeholder()
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last_typ := p.statements()
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if is_assign && last_typ == typ {
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expr_line := p.cgen.lines[p.cgen.lines.len-2]
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last_expr := expr_line[last_ph..]
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p.cgen.lines[p.cgen.lines.len-2] = ''
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p.genln('if ($tmp .ok) {')
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p.genln('$name = *($typ*) $tmp . data;')
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p.genln('} else {')
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p.genln('$name = $last_expr')
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p.genln('}')
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} else if is_assign {
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p.genln('$name = *($typ*)${tmp}.data;')
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}
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if !p.returns && last_typ != typ && is_assign && p.prev_tok2 != .key_continue && p.prev_tok2 != .key_break {
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p.error_with_token_index('`or` block must provide a default value or return/exit/continue/break/panic', or_tok_idx)
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}
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p.returns = false
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return typ
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}
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// `files := os.ls('.')?`
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fn (p mut Parser) gen_handle_question_suffix(f Fn, ph int) string {
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if p.cur_fn.name != 'main__main' {
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p.error('`func()?` syntax can only be used inside `fn main()` for now')
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}
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p.check(.question)
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tmp := p.get_tmp()
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p.cgen.set_placeholder(ph, '$f.typ $tmp = ')
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p.genln(';')
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p.genln('if (!${tmp}.ok) v_panic(${tmp}.error);')
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typ := f.typ[7..] // option_xxx
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p.gen('*($typ*) ${tmp}.data;')
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return typ
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}
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fn types_to_c(types []Type, table &Table) string {
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mut sb := strings.new_builder(10)
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for t in types {
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//if t.cat != .union_ && t.cat != .struct_ && t.cat != .objc_interface {
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if !(t.cat in [.union_, .struct_, .objc_interface, .interface_]) {
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continue
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}
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//if is_atomic {
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//sb.write('_Atomic ')
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//}
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if t.cat == .objc_interface {
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sb.writeln('@interface $t.name : $t.parent { @public')
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}
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else {
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kind := if t.cat == .union_ {'union'} else {'struct'}
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sb.writeln('$kind $t.name {')
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if t.cat == .interface_ {
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sb.writeln('\tvoid* _object;')
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sb.writeln('\tint _interface_idx; // int t')
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}
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}
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for field in t.fields {
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sb.write('\t')
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sb.writeln(table.cgen_name_type_pair(field.name,
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field.typ) + ';')
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}
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sb.writeln('};\n')
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if t.cat == .objc_interface {
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sb.writeln('@end')
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}
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}
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return sb.str()
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}
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fn (p mut Parser) index_get(typ string, fn_ph int, cfg IndexConfig) {
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// Erase var name we generated earlier: "int a = m, 0"
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// "m, 0" gets killed since we need to start from scratch. It's messy.
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// "m, 0" is an index expression, save it before deleting and insert later in map_get()
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mut index_expr := ''
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if p.cgen.is_tmp {
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index_expr = p.cgen.tmp_line[fn_ph..]
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p.cgen.resetln(p.cgen.tmp_line[..fn_ph])
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} else {
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index_expr = p.cgen.cur_line[fn_ph..]
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p.cgen.resetln(p.cgen.cur_line[..fn_ph])
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}
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// Can't pass integer literal, because map_get() requires a void*
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tmp := p.get_tmp()
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tmp_ok := p.get_tmp()
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if cfg.is_map {
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p.gen('$tmp')
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def := type_default(typ)
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p.cgen.insert_before('$typ $tmp = $def; ' +
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'bool $tmp_ok = map_get(/*$p.file_name : $p.scanner.line_nr*/$index_expr, & $tmp);')
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}
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else if cfg.is_arr {
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if p.pref.translated && !p.builtin_mod {
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p.gen('$index_expr ]')
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}
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else {
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ref := if cfg.is_ptr { '*' } else { '' }
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if cfg.is_slice {
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p.gen(' array_slice2($ref $index_expr) ')
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}
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else {
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p.gen('( *($typ*) array_get($ref $index_expr) )')
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}
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}
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}
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else if cfg.is_str && !p.builtin_mod {
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if p.pref.is_bare {
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p.gen(index_expr)
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}
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else if cfg.is_slice {
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p.gen('string_substr2($index_expr)')
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} else {
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p.gen('string_at($index_expr)')
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}
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}
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// Zero the string after map_get() if it's nil, numbers are automatically 0
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// This is ugly, but what can I do without generics?
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// TODO what about user types?
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if cfg.is_map && typ == 'string' {
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// p.cgen.insert_before('if (!${tmp}.str) $tmp = tos("", 0);')
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p.cgen.insert_before('if (!$tmp_ok) $tmp = tos((byte *)"", 0);')
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}
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}
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fn (table mut Table) fn_gen_name(f &Fn) string {
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mut name := f.name
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if f.is_method {
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name = '${f.receiver_typ}_$f.name'
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name = name.replace(' ', '')
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if f.name.len == 1 {
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match f.name[0] {
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`+` { name = name.replace('+', 'op_plus') }
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`-` { name = name.replace('-', 'op_minus') }
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`*` { name = name.replace('*', 'op_mul') }
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`/` { name = name.replace('/', 'op_div') }
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`%` { name = name.replace('%', 'op_mod') }
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else {}
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}
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}
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}
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if f.is_interface {
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// iname := f.args[0].typ // Speaker
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// var := p.expr_var.name
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return ''
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}
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// Avoid name conflicts (with things like abs(), print() etc).
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// Generate v_abs(), v_print()
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// TODO duplicate functionality
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if f.mod == 'builtin' && f.name in c_reserved {
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return 'v_$name'
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}
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// Obfuscate but skip certain names
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// TODO ugly, fix
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// NB: the order here is from faster to potentially slower checks
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if table.obfuscate &&
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!f.is_c &&
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f.name != 'main' && f.name != 'WinMain' && f.name != 'main__main' &&
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f.name != 'gg__vec2' &&
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f.name != 'build_token_str' &&
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f.name != 'build_keys' &&
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f.mod != 'builtin' &&
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f.mod != 'darwin' &&
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f.mod != 'os' &&
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f.mod != 'json' &&
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!f.name.ends_with('_init') &&
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!f.name.contains('window_proc') &&
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!name.ends_with('_str') &&
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!name.contains('contains') {
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mut idx := table.obf_ids[name]
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// No such function yet, register it
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if idx == 0 {
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table.fn_cnt++
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table.obf_ids[name] = table.fn_cnt
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idx = table.fn_cnt
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}
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old := name
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name = 'f_$idx'
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println('$old ==> $name')
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}
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return name
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}
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fn (p mut Parser) gen_method_call(receiver &Var, receiver_type string,
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cgen_name string, ftyp string, method_ph int)
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{
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//mut cgen_name := p.table.fn_gen_name(f)
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mut method_call := cgen_name + ' ('
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// if receiver is key_mut or a ref (&), generate & for the first arg
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if receiver.ref || (receiver.is_mut && !receiver_type.contains('*')) {
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method_call += '& /* ? */'
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}
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// generate deref (TODO copy pasta later in fn_call_args)
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if !receiver.is_mut && receiver_type.contains('*') {
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method_call += '*'
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}
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mut cast := ''
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// Method returns (void*) => cast it to int, string, user etc
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// number := *(int*)numbers.first()
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if ftyp == 'void*' {
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if receiver_type.starts_with('array_') {
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// array_int => int
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cast = receiver_type.all_after('array_')
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cast = '*($cast*) '
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} else {
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cast = '(voidptr) '
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}
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}
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p.cgen.set_placeholder(method_ph, '$cast $method_call')
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}
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fn (p mut Parser) gen_array_at(typ_ string, is_arr0 bool, fn_ph int) {
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mut typ := typ_
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//p.fgen('[')
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// array_int a; a[0]
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// type is "array_int", need "int"
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// typ = typ.replace('array_', '')
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// if is_arr0 {
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// typ = typ.right(6)
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// }
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// array a; a.first() voidptr
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// type is "array", need "void*"
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if typ == 'array' {
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typ = 'void*'
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}
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// No bounds check in translated from C code
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if p.pref.translated && !p.builtin_mod {
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// Cast void* to typ*: add (typ*) to the beginning of the assignment :
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// ((int*)a.data = ...
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p.cgen.set_placeholder(fn_ph, '(($typ*)(')
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p.gen('.data))[')
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}
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else {
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p.gen(',')
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}
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}
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fn (p mut Parser) gen_for_header(i, tmp, var_typ, val string) {
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p.genln('for (int $i = 0; $i < ${tmp}.len; $i++) {')
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if val == '_' { return }
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p.genln('$var_typ $val = (($var_typ *) $tmp . data)[$i];')
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}
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fn (p mut Parser) gen_for_fixed_header(i, tmp, var_typ, val string) {
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p.genln('for (int $i = 0; $i < sizeof(${tmp}) / sizeof($tmp [0]); $i++) {')
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if val == '_' { return }
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p.genln('$var_typ $val = $tmp[$i];')
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}
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fn (p mut Parser) gen_for_str_header(i, tmp, var_typ, val string) {
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// TODO var_typ is always byte
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//p.genln('array_byte bytes_$tmp = string_bytes( $tmp );')
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p.genln(';\nfor (int $i = 0; $i < $tmp .len; $i ++) {')
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if val == '_' { return }
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//p.genln('$var_typ $val = (($var_typ *) bytes_$tmp . data)[$i];')
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p.genln('$var_typ $val = ${tmp}.str[$i];')
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}
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fn (p mut Parser) gen_for_range_header(i, range_end, tmp, var_type, val string) {
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p.genln(';\nfor (int $i = $tmp; $i < $range_end; $i++) {')
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if val == '_' { return }
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p.genln('$var_type $val = $i;')
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}
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fn (p mut Parser) gen_for_map_header(i, tmp, var_typ, val, typ string) {
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def := type_default(typ)
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p.genln('array_string keys_$tmp = map_keys(& $tmp ); ')
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p.genln('for (int l = 0; l < keys_$tmp .len; l++) {')
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p.genln('string $i = ((string*)keys_$tmp .data)[l];')
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// TODO don't call map_get() for each key, fetch values while traversing
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// the tree (replace `map_keys()` above with `map_key_vals()`)
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if val == '_' { return }
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p.genln('$var_typ $val = $def; map_get($tmp, $i, & $val);')
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}
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fn (p mut Parser) gen_for_varg_header(i, varg, var_typ, val string) {
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p.genln('for (int $i = 0; $i < ${varg}->len; $i++) {')
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if val == '_' { return }
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p.genln('$var_typ $val = (($var_typ *) $varg->args)[$i];')
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}
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fn (p mut Parser) gen_array_init(typ string, no_alloc bool, new_arr_ph int, nr_elems int) {
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mut new_arr := 'new_array_from_c_array'
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if no_alloc {
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new_arr += '_no_alloc'
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}
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if nr_elems == 0 {
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p.gen(' TCCSKIP(0) })')
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} else {
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p.gen(' })')
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}
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// Need to do this in the second pass, otherwise it goes to the very top of the out.c file
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if !p.first_pass() {
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p.cgen.set_placeholder(new_arr_ph,
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'$new_arr($nr_elems, $nr_elems, sizeof($typ), EMPTY_ARRAY_OF_ELEMS( $typ, $nr_elems ) { ')
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}
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}
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fn (p mut Parser) gen_array_set(typ string, is_ptr, is_map bool,fn_ph, assign_pos int, is_cao bool) {
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// `a[0] = 7`
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// curline right now: `a , 0 = 7`
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mut val := p.cgen.cur_line[assign_pos..]
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p.cgen.resetln(p.cgen.cur_line[..assign_pos])
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mut cao_tmp := p.cgen.cur_line
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mut func := ''
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if is_map {
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if is_ptr {
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func = 'map_set('
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} else {
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func = 'map_set(&'
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}
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// CAO on map is a bit more complicated as it loads
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// the value inside a pointer instead of returning it.
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}
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else {
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if is_ptr {
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func = 'array_set('
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if is_cao {
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cao_tmp = '*($p.expected_type *) array_get(*$cao_tmp)'
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}
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}
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else {
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func = 'array_set(&/*q*/'
|
|
if is_cao {
|
|
cao_tmp = '*($p.expected_type *) array_get($cao_tmp)'
|
|
}
|
|
}
|
|
}
|
|
p.cgen.set_placeholder(fn_ph, func)
|
|
if is_cao {
|
|
val = cao_tmp + val.all_before('=') + val.all_after('=')
|
|
}
|
|
p.gen(', & ($typ []) { $val })')
|
|
}
|
|
|
|
|
|
// returns true in case of an early return
|
|
fn (p mut Parser) gen_struct_init(typ string, t Type) bool {
|
|
// TODO hack. If it's a C type, we may need to add "struct" before declaration:
|
|
// a := &C.A{} ==> struct A* a = malloc(sizeof(struct A));
|
|
if p.is_c_struct_init {
|
|
if t.cat != .c_typedef {
|
|
p.cgen.insert_before('struct /*c struct init*/')
|
|
}
|
|
}
|
|
// TODO tm struct struct bug
|
|
if typ == 'tm' {
|
|
p.cgen.lines[p.cgen.lines.len-1] = ''
|
|
}
|
|
p.next()
|
|
p.check(.lcbr)
|
|
ptr := typ.contains('*')
|
|
// `user := User{foo:bar}` => `User user = (User){ .foo = bar}`
|
|
if !ptr {
|
|
if p.is_c_struct_init {
|
|
// `face := C.FT_Face{}` => `FT_Face face;`
|
|
if p.tok == .rcbr {
|
|
p.is_empty_c_struct_init = true
|
|
p.check(.rcbr)
|
|
return true
|
|
}
|
|
p.gen('(struct $typ) {')
|
|
p.is_c_struct_init = false
|
|
}
|
|
else {
|
|
p.gen('($typ) {')
|
|
}
|
|
}
|
|
else {
|
|
if p.tok == .not {
|
|
// old &User{!} ==> 0 hack
|
|
p.error('use `$t.name(0)` instead of `&$t.name{!}`')
|
|
/*
|
|
p.next()
|
|
p.gen('0')
|
|
p.check(.rcbr)
|
|
return true
|
|
*/
|
|
}
|
|
p.gen('($t.name*)memdup(&($t.name) {')
|
|
}
|
|
return false
|
|
}
|
|
|
|
fn (p mut Parser) gen_struct_field_init(field string) {
|
|
p.gen('.$field = ')
|
|
}
|
|
|
|
fn (p mut Parser) gen_empty_map(typ string) {
|
|
p.gen('new_map(1, sizeof($typ))')
|
|
}
|
|
|
|
fn (p mut Parser) cast(typ string) {
|
|
p.gen('(')
|
|
defer { p.gen(')') }
|
|
p.next()
|
|
pos := p.cgen.add_placeholder()
|
|
if p.tok == .rpar {
|
|
// skip `)` if it's `(*int)(ptr)`, not `int(a)`
|
|
p.ptr_cast = true
|
|
p.next()
|
|
}
|
|
p.check(.lpar)
|
|
p.expected_type = typ
|
|
expr_typ := p.bool_expression()
|
|
// Do not allow `int(my_int)`
|
|
if expr_typ == typ {
|
|
p.warn('casting `$typ` to `$expr_typ` is not needed')
|
|
}
|
|
// `face := FT_Face(cobj)` => `FT_Face face = *((FT_Face*)cobj);`
|
|
casting_voidptr_to_value := expr_typ == 'void*' && typ != 'int' &&
|
|
typ != 'byteptr' && !typ.ends_with('*')
|
|
p.expected_type = ''
|
|
// `string(buffer)` => `tos2(buffer)`
|
|
// `string(buffer, len)` => `tos(buffer, len)`
|
|
// `string(bytes_array, len)` => `tos(bytes_array.data, len)`
|
|
is_byteptr := expr_typ == 'byte*' || expr_typ == 'byteptr'
|
|
is_bytearr := expr_typ == 'array_byte'
|
|
if typ == 'string' {
|
|
if is_byteptr || is_bytearr {
|
|
if p.tok == .comma {
|
|
p.check(.comma)
|
|
p.cgen.set_placeholder(pos, 'tos((byte *)')
|
|
if is_bytearr {
|
|
p.gen('.data')
|
|
}
|
|
p.gen(', ')
|
|
p.check_types(p.expression(), 'int')
|
|
} else {
|
|
if is_bytearr {
|
|
p.gen('.data')
|
|
}
|
|
p.cgen.set_placeholder(pos, 'tos2((byte *)')
|
|
}
|
|
}
|
|
// `string(234)` => error
|
|
else if expr_typ == 'int' {
|
|
p.error('cannot cast `$expr_typ` to `$typ`, use `str()` method instead')
|
|
}
|
|
else {
|
|
p.error('cannot cast `$expr_typ` to `$typ`')
|
|
}
|
|
}
|
|
else if typ == 'byte' && expr_typ == 'string' {
|
|
p.error('cannot cast `$expr_typ` to `$typ`, use backquotes `` to create a `$typ` or access the value of an index of `$expr_typ` using []')
|
|
}
|
|
else if casting_voidptr_to_value {
|
|
p.cgen.set_placeholder(pos, '($typ)(')
|
|
}
|
|
else {
|
|
// Nothing can be cast to bool
|
|
if typ == 'bool' {
|
|
if is_number_type(expr_typ) || is_float_type(expr_typ) {
|
|
p.error('cannot cast a number to `bool`')
|
|
}
|
|
p.error('cannot cast `$expr_typ` to `bool`')
|
|
}
|
|
// Strings can't be cast
|
|
if expr_typ == 'string' {
|
|
p.error('cannot cast `$expr_typ` to `$typ`')
|
|
}
|
|
// Nothing can be cast to bool
|
|
if expr_typ == 'bool' {
|
|
p.error('cannot cast `bool` to `$typ`')
|
|
}
|
|
p.cgen.set_placeholder(pos, '($typ)(')
|
|
}
|
|
p.check(.rpar)
|
|
p.gen(')')
|
|
}
|
|
|
|
fn type_default(typ string) string {
|
|
if typ.starts_with('array_') {
|
|
return 'new_array(0, 1, sizeof( ${typ[6..]} ))'
|
|
}
|
|
// Always set pointers to 0
|
|
if typ.ends_with('*') {
|
|
return '0'
|
|
}
|
|
// User struct defined in another module.
|
|
if typ.contains('__') {
|
|
return '{0}'
|
|
}
|
|
// Default values for other types are not needed because of mandatory initialization
|
|
match typ {
|
|
'bool'{ return '0'}
|
|
'string'{ return 'tos3("")'}
|
|
'i8'{ return '0'}
|
|
'i16'{ return '0'}
|
|
'i64'{ return '0'}
|
|
'u16'{ return '0'}
|
|
'u32'{ return '0'}
|
|
'u64'{ return '0'}
|
|
'byte'{ return '0'}
|
|
'int'{ return '0'}
|
|
'rune'{ return '0'}
|
|
'f32'{ return '0.0'}
|
|
'f64'{ return '0.0'}
|
|
'byteptr'{ return '0'}
|
|
'voidptr'{ return '0'}
|
|
else {}
|
|
}
|
|
return '{0}'
|
|
|
|
|
|
// TODO this results in
|
|
// error: expected a field designator, such as '.field = 4'
|
|
//- Empty ee= (Empty) { . = {0} } ;
|
|
/*
|
|
return match typ {
|
|
'bool'{ '0'}
|
|
'string'{ 'tos3("")'}
|
|
'i8'{ '0'}
|
|
'i16'{ '0'}
|
|
'i64'{ '0'}
|
|
'u16'{ '0'}
|
|
'u32'{ '0'}
|
|
'u64'{ '0'}
|
|
'byte'{ '0'}
|
|
'int'{ '0'}
|
|
'rune'{ '0'}
|
|
'f32'{ '0.0'}
|
|
'f64'{ '0.0'}
|
|
'byteptr'{ '0'}
|
|
'voidptr'{ '0'}
|
|
else { '{0} '}
|
|
}
|
|
*/
|
|
}
|
|
|
|
fn (p mut Parser) gen_array_push(ph int, typ, expr_type, tmp, elm_type string) {
|
|
// Two arrays of the same type?
|
|
push_array := typ == expr_type
|
|
if push_array {
|
|
p.cgen.set_placeholder(ph, '_PUSH_MANY(&' )
|
|
p.gen('), $tmp, $typ)')
|
|
} else {
|
|
p.check_types(expr_type, elm_type)
|
|
// Pass tmp var info to the _PUSH macro
|
|
// Prepend tmp initialisation and push call
|
|
// Don't dereference if it's already a mutable array argument (`fn foo(mut []int)`)
|
|
push_call := if typ.contains('*'){'_PUSH('} else { '_PUSH(&'}
|
|
p.cgen.set_placeholder(ph, push_call)
|
|
if elm_type.ends_with('*') {
|
|
p.gen('), $tmp, ${elm_type[..elm_type.len - 1]})')
|
|
} else {
|
|
p.gen('), $tmp, $elm_type)')
|
|
}
|
|
}
|
|
}
|
|
|