979 lines
27 KiB
Go
979 lines
27 KiB
Go
// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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module main
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import strings
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const (
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MaxLocalVars = 50
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)
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struct Fn {
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// addr int
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mut:
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name string
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mod string
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local_vars []Var
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var_idx int
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args []Var
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is_interface bool
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// called_fns []string
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// idx int
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scope_level int
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typ string // return type
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is_c bool
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receiver_typ string
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is_public bool
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is_method bool
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returns_error bool
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is_decl bool // type myfn fn(int, int)
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defer_text string
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//gen_types []string
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}
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fn (f &Fn) find_var(name string) Var {
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for i in 0 .. f.var_idx {
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if f.local_vars[i].name == name {
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return f.local_vars[i]
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}
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}
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return Var{}
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}
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fn (f mut Fn) open_scope() {
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f.scope_level++
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}
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fn (f &Fn) mark_var_used(v Var) {
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for i, vv in f.local_vars {
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if vv.name == v.name {
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//mut ptr := &f.local_vars[i]
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//ptr.is_used = true
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f.local_vars[i].is_used = true
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return
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}
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}
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}
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fn (f &Fn) mark_var_changed(v Var) {
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for i, vv in f.local_vars {
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if vv.name == v.name {
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//mut ptr := &f.local_vars[i]
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//ptr.is_used = true
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f.local_vars[i].is_changed = true
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// return
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}
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}
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}
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fn (f &Fn) known_var(name string) bool {
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v := f.find_var(name)
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return v.name.len > 0
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}
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fn (f mut Fn) register_var(v Var) {
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new_var := {v | scope_level: f.scope_level}
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// Expand the array
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if f.var_idx >= f.local_vars.len {
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f.local_vars << new_var
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}
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else {
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f.local_vars[f.var_idx] = new_var
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}
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f.var_idx++
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}
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fn (f mut Fn) clear_vars() {
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f.var_idx = 0
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f.local_vars = []Var
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}
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// vlib header file?
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fn (p mut Parser) is_sig() bool {
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return (p.pref.build_mode == .default_mode || p.pref.build_mode == .build) &&
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(p.file_path.contains(ModPath))
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}
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fn new_fn(mod string, is_public bool) *Fn {
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return &Fn {
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mod: mod
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local_vars: [Var{} ; MaxLocalVars]
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is_public: is_public
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}
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}
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// Function signatures are added to the top of the .c file in the first run.
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fn (p mut Parser) fn_decl() {
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p.fgen('fn ')
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defer { p.fgenln('\n') }
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is_pub := p.tok == .key_pub
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is_live := p.attr == 'live' && !p.pref.is_so && p.pref.is_live
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if p.attr == 'live' && p.first_pass() && !p.pref.is_live && !p.pref.is_so {
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println('INFO: run `v -live program.v` if you want to use [live] functions')
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}
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if is_pub {
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p.next()
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}
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p.returns = false
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p.next()
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mut f := new_fn(p.mod, is_pub)
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// Method receiver
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mut receiver_typ := ''
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if p.tok == .lpar {
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f.is_method = true
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p.check(.lpar)
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receiver_name := p.check_name()
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is_mut := p.tok == .key_mut
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is_amp := p.tok == .amp
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if is_mut || is_amp {
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p.check_space(p.tok)
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}
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receiver_typ = p.get_type()
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T := p.table.find_type(receiver_typ)
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if T.is_interface {
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p.error('invalid receiver type `$receiver_typ` (`$receiver_typ` is an interface)')
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}
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// Don't allow modifying types from a different module
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if !p.first_pass() && !p.builtin_mod && T.mod != p.mod {
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println('T.mod=$T.mod')
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println('p.mod=$p.mod')
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p.error('cannot define new methods on non-local type `$receiver_typ`')
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}
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// (a *Foo) instead of (a mut Foo) is a common mistake
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if !p.builtin_mod && receiver_typ.contains('*') {
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t := receiver_typ.replace('*', '')
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p.error('use `($receiver_name mut $t)` instead of `($receiver_name *$t)`')
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}
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f.receiver_typ = receiver_typ
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if is_mut || is_amp {
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receiver_typ += '*'
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}
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p.check(.rpar)
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p.fspace()
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receiver := Var {
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name: receiver_name
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is_arg: true
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typ: receiver_typ
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is_mut: is_mut
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ref: is_amp
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ptr: is_mut
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line_nr: p.scanner.line_nr
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}
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f.args << receiver
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f.register_var(receiver)
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}
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if p.tok == .plus || p.tok == .minus || p.tok == .mul {
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f.name = p.tok.str()
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p.next()
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}
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else {
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f.name = p.check_name()
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}
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// C function header def? (fn C.NSMakeRect(int,int,int,int))
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is_c := f.name == 'C' && p.tok == .dot
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// Just fn signature? only builtin.v + default build mode
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// is_sig := p.builtin_mod && p.pref.build_mode == default_mode
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// is_sig := p.pref.build_mode == default_mode && (p.builtin_mod || p.file.contains(LANG_TMP))
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is_sig := p.is_sig()
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// println('\n\nfn decl !!is_sig=$is_sig name=$f.name $p.builtin_mod')
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if is_c {
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p.check(.dot)
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f.name = p.check_name()
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f.is_c = true
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}
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else if !p.pref.translated && !p.file_path.contains('view.v') {
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if contains_capital(f.name) {
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p.error('function names cannot contain uppercase letters, use snake_case instead')
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}
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if f.name.contains('__') {
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p.error('function names cannot contain double underscores, use single underscores instead')
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}
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}
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// simple_name := f.name
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// println('!SIMP.le=$simple_name')
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// user.register() => User_register()
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has_receiver := receiver_typ.len > 0
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if receiver_typ != '' {
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// f.name = '${receiver_typ}_${f.name}'
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}
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// full mod function name
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// os.exit ==> os__exit()
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if !is_c && !p.builtin_mod && p.mod != 'main' && receiver_typ.len == 0 {
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f.name = p.prepend_mod(f.name)
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}
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if p.first_pass() && p.table.known_fn(f.name) && receiver_typ.len == 0 {
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existing_fn := p.table.find_fn(f.name)
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// This existing function could be defined as C decl before (no body), then we don't need to throw an erro
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if !existing_fn.is_decl {
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p.error('redefinition of `$f.name`')
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}
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}
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// Generic?
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mut is_generic := false
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if p.tok == .lt {
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is_generic = true
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p.next()
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gen_type := p.check_name()
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if gen_type != 'T' {
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p.error('only `T` is allowed as a generic type for now')
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}
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p.check(.gt)
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if p.first_pass() {
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p.table.register_generic_fn(f.name)
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} else {
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//gen_types := p.table.fn_gen_types(f.name)
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//println(gen_types)
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}
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}
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// Args (...)
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p.fn_args(mut f)
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// Returns an error?
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if p.tok == .not {
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p.next()
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f.returns_error = true
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}
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// Returns a type?
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mut typ := 'void'
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if p.tok == .name || p.tok == .mul || p.tok == .amp || p.tok == .lsbr ||
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p.tok == .question {
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p.fgen(' ')
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// TODO In
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// if p.tok in [ .name, .mul, .amp, .lsbr ] {
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typ = p.get_type()
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}
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// Translated C code can have empty functions (just definitions)
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is_fn_header := !is_c && !is_sig && (p.pref.translated || p.pref.is_test) && p.tok != .lcbr
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if is_fn_header {
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f.is_decl = true
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}
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// { required only in normal function declarations
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if !is_c && !is_sig && !is_fn_header {
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p.fgen(' ')
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p.check(.lcbr)
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}
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// Register ?option type
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if typ.starts_with('Option_') {
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p.cgen.typedefs << 'typedef Option $typ;'
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}
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// Register function
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f.typ = typ
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mut str_args := f.str_args(p.table)
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// Special case for main() args
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if f.name == 'main' && !has_receiver {
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if str_args != '' || typ != 'void' {
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p.error('fn main must have no arguments and no return values')
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}
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typ = 'int'
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str_args = 'int argc, char** argv'
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}
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dll_export_linkage := if p.os == .msvc && p.attr == 'live' && p.pref.is_so {
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'__declspec(dllexport) '
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} else {
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''
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}
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if !p.is_vweb {
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p.cur_fn = f
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}
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// Generate `User_register()` instead of `register()`
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// Internally it's still stored as "register" in type User
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mut fn_name_cgen := p.table.cgen_name(f)
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// Start generation of the function body
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skip_main_in_test := f.name == 'main' && p.pref.is_test
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if !is_c && !is_live && !is_sig && !is_fn_header && !skip_main_in_test {
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if p.pref.obfuscate {
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p.genln('; // $f.name')
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}
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// Generate this function's body for all generic types
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if is_generic {
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gen_types := p.table.fn_gen_types(f.name)
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// Remember current scanner position, go back here for each type
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// TODO remove this once tokens are cached in `new_parser()`
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cur_pos := p.scanner.pos
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cur_tok := p.tok
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cur_lit := p.lit
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for gen_type in gen_types {
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p.genln('$dll_export_linkage$typ ${fn_name_cgen}_$gen_type($str_args) {')
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p.genln('// T start $p.pass ${p.strtok()}')
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p.cur_gen_type = gen_type // TODO support more than T
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p.statements()
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p.scanner.pos = cur_pos
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p.tok = cur_tok
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p.lit = cur_lit
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}
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}
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else {
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p.genln('$dll_export_linkage$typ $fn_name_cgen($str_args) {')
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}
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}
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if is_fn_header {
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p.genln('$typ $fn_name_cgen($str_args);')
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p.fgenln('')
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}
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if is_c {
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p.fgenln('\n')
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}
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// Register the method
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if receiver_typ != '' {
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mut receiver_t := p.table.find_type(receiver_typ)
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// No such type yet? It could be defined later. Create a new type.
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// struct declaration later will modify it instead of creating a new one.
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if p.first_pass() && receiver_t.name == '' {
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// println('fn decl !!!!!!! REG PH $receiver_typ')
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p.table.register_type2(Type {
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name: receiver_typ.replace('*', '')
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mod: p.mod
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is_placeholder: true
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})
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}
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// f.idx = p.table.fn_cnt
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receiver_t.add_method(f)
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}
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else {
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// println('register_fn typ=$typ isg=$is_generic')
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p.table.register_fn(f)
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}
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if is_sig || p.first_pass() || is_live || is_fn_header || skip_main_in_test {
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// First pass? Skip the body for now
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// Look for generic calls.
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if !is_sig && !is_fn_header {
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mut opened_scopes := 0
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mut closed_scopes := 0
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for {
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if p.tok == .lcbr {
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opened_scopes++
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}
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if p.tok == .rcbr {
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closed_scopes++
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}
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p.next()
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// find `foo<Bar>()` in function bodies and register generic types
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// TODO remove this once tokens are cached
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if p.tok == .gt && p.prev_tok == .name && p.prev_tok2 == .lt &&
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p.scanner.text[p.scanner.pos-1] != `T` {
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p.scanner.pos -= 3
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for p.scanner.pos > 0 && (is_name_char(p.scanner.text[p.scanner.pos]) ||
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p.scanner.text[p.scanner.pos] == `.` ||
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p.scanner.text[p.scanner.pos] == `<` ) {
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p.scanner.pos--
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}
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p.scanner.pos--
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p.next()
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// Run the function in the firt pass to register the generic type
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p.name_expr()
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}
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if p.tok.is_decl() && !(p.prev_tok == .dot && p.tok == .key_type) {
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break
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}
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// fn body ended, and a new fn attribute declaration like [live] is starting?
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if closed_scopes > opened_scopes && p.prev_tok == .rcbr {
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if p.tok == .lsbr {
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break
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}
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}
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}
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}
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// Live code reloading? Load all fns from .so
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if is_live && p.first_pass() && p.mod == 'main' {
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//println('ADDING SO FN $fn_name_cgen')
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p.cgen.so_fns << fn_name_cgen
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fn_name_cgen = '(* $fn_name_cgen )'
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}
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// Function definition that goes to the top of the C file.
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mut fn_decl := '$dll_export_linkage$typ $fn_name_cgen($str_args)'
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if p.pref.obfuscate {
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fn_decl += '; // $f.name'
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}
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// Add function definition to the top
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if !is_c && f.name != 'main' && p.first_pass() {
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// TODO hack to make Volt compile without -embed_vlib
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if f.name == 'darwin__nsstring' && p.pref.build_mode == .default_mode {
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return
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}
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p.cgen.fns << fn_decl + ';'
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}
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return
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}
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if p.attr == 'live' && p.pref.is_so {
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//p.genln('// live_function body start')
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p.genln('pthread_mutex_lock(&live_fn_mutex);')
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}
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if f.name == 'main' || f.name == 'WinMain' {
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p.genln('init_consts();')
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if p.table.imports.contains('os') {
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if f.name == 'main' {
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p.genln('os__args = os__init_os_args(argc, argv);')
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}
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else if f.name == 'WinMain' {
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p.genln('os__args = os__parse_windows_cmd_line(pCmdLine);')
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}
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}
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// We are in live code reload mode, call the .so loader in bg
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if p.pref.is_live {
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file_base := p.file_path.replace('.v', '')
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if p.os != .windows && p.os != .msvc {
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so_name := file_base + '.so'
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p.genln('
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load_so("$so_name");
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pthread_t _thread_so;
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pthread_create(&_thread_so , NULL, &reload_so, NULL); ')
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} else {
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so_name := file_base + if p.os == .msvc {'.dll'} else {'.so'}
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p.genln('
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live_fn_mutex = CreateMutexA(0, 0, 0);
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load_so("$so_name");
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unsigned long _thread_so;
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_thread_so = CreateThread(0, 0, (LPTHREAD_START_ROUTINE)&reload_so, 0, 0, 0);
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')
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}
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}
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if p.pref.is_test && !p.scanner.file_path.contains('/volt') {
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p.error('tests cannot have function `main`')
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}
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}
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// println('is_c=$is_c name=$f.name')
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if is_c || is_sig || is_fn_header {
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// println('IS SIG .key_returnING tok=${p.strtok()}')
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return
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}
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// Profiling mode? Start counting at the beginning of the function (save current time).
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if p.pref.is_prof && f.name != 'main' && f.name != 'time__ticks' {
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p.genln('double _PROF_START = time__ticks();//$f.name')
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cgen_name := p.table.cgen_name(f)
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f.defer_text = ' ${cgen_name}_time += time__ticks() - _PROF_START;'
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}
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if is_generic {
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// Don't need to generate body for the actual generic definition
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p.cgen.nogen = true
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}
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p.statements_no_rcbr()
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p.cgen.nogen = false
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// Print counting result after all statements in main
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if p.pref.is_prof && f.name == 'main' {
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p.genln(p.print_prof_counters())
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}
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// Counting or not, always need to add defer before the end
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p.genln(f.defer_text)
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if typ != 'void' && !p.returns && f.name != 'main' && f.name != 'WinMain' {
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p.error('$f.name must return "$typ"')
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}
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if p.attr == 'live' && p.pref.is_so {
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//p.genln('// live_function body end')
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p.genln('pthread_mutex_unlock(&live_fn_mutex);')
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}
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// {} closed correctly? scope_level should be 0
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if p.mod == 'main' {
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// println(p.cur_fn.scope_level)
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}
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if p.cur_fn.scope_level > 2 {
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// p.error('unclosed {')
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}
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// Make sure all vars in this function are used (only in main for now)
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// if p.builtin_mod || p.mod == 'os' ||p.mod=='http'{
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if p.mod != 'main' {
|
|
if !is_generic {
|
|
p.genln('}')
|
|
}
|
|
return
|
|
}
|
|
p.check_unused_variables()
|
|
p.cur_fn = EmptyFn
|
|
if !is_generic {
|
|
p.genln('}')
|
|
}
|
|
}
|
|
|
|
fn (p mut Parser) check_unused_variables() {
|
|
for var in p.cur_fn.local_vars {
|
|
if var.name == '' {
|
|
break
|
|
}
|
|
if !var.is_used && !p.pref.is_repl && !var.is_arg && !p.pref.translated && var.name != '_' {
|
|
p.scanner.line_nr = var.line_nr - 1
|
|
p.error('`$var.name` declared and not used')
|
|
}
|
|
if !var.is_changed && var.is_mut && !p.pref.is_repl && !var.is_arg && !p.pref.translated && var.name != '_' {
|
|
p.scanner.line_nr = var.line_nr - 1
|
|
p.error('`$var.name` is declared as mutable, but it was never changed')
|
|
}
|
|
}
|
|
}
|
|
|
|
// user.register() => "User_register(user)"
|
|
// method_ph - where to insert "user_register("
|
|
// receiver_var - "user" (needed for pthreads)
|
|
// receiver_type - "User"
|
|
fn (p mut Parser) async_fn_call(f Fn, method_ph int, receiver_var, receiver_type string) {
|
|
// println('\nfn_call $f.name is_method=$f.is_method receiver_type=$f.receiver_type')
|
|
// p.print_tok()
|
|
mut thread_name := ''
|
|
// Normal function => just its name, method => TYPE_FN.name
|
|
mut fn_name := f.name
|
|
if f.is_method {
|
|
fn_name = receiver_type.replace('*', '') + '_' + f.name
|
|
//fn_name = '${receiver_type}_${f.name}'
|
|
}
|
|
// Generate tmp struct with args
|
|
arg_struct_name := 'thread_arg_$fn_name'
|
|
tmp_struct := p.get_tmp()
|
|
p.genln('$arg_struct_name * $tmp_struct = malloc(sizeof($arg_struct_name));')
|
|
mut arg_struct := 'typedef struct $arg_struct_name { '
|
|
p.next()
|
|
p.check(.lpar)
|
|
// str_args contains the args for the wrapper function:
|
|
// wrapper(arg_struct * arg) { fn("arg->a, arg->b"); }
|
|
mut str_args := ''
|
|
mut did_gen_something := false
|
|
for i, arg in f.args {
|
|
arg_struct += '$arg.typ $arg.name ;'// Add another field (arg) to the tmp struct definition
|
|
str_args += 'arg->$arg.name'
|
|
if i == 0 && f.is_method {
|
|
p.genln('$tmp_struct -> $arg.name = $receiver_var ;')
|
|
if i < f.args.len - 1 {
|
|
str_args += ','
|
|
}
|
|
continue
|
|
}
|
|
// Set the struct values (args)
|
|
p.genln('$tmp_struct -> $arg.name = ')
|
|
p.expression()
|
|
p.genln(';')
|
|
if i < f.args.len - 1 {
|
|
p.check(.comma)
|
|
str_args += ','
|
|
}
|
|
did_gen_something = true
|
|
}
|
|
|
|
if !did_gen_something {
|
|
// Msvc doesnt like empty struct
|
|
arg_struct += 'EMPTY_STRUCT_DECLARATION'
|
|
}
|
|
|
|
arg_struct += '} $arg_struct_name ;'
|
|
// Also register the wrapper, so we can use the original function without modifying it
|
|
fn_name = p.table.cgen_name(f)
|
|
wrapper_name := '${fn_name}_thread_wrapper'
|
|
wrapper_text := 'void* $wrapper_name($arg_struct_name * arg) {$fn_name( /*f*/$str_args ); }'
|
|
p.cgen.register_thread_fn(wrapper_name, wrapper_text, arg_struct)
|
|
// Create thread object
|
|
tmp_nr := p.get_tmp_counter()
|
|
thread_name = '_thread$tmp_nr'
|
|
if p.os != .windows && p.os != .msvc {
|
|
p.genln('pthread_t $thread_name;')
|
|
}
|
|
tmp2 := p.get_tmp()
|
|
mut parg := 'NULL'
|
|
if f.args.len > 0 {
|
|
parg = ' $tmp_struct'
|
|
}
|
|
// Call the wrapper
|
|
if p.os == .windows || p.os == .msvc {
|
|
p.genln(' CreateThread(0,0, $wrapper_name, $parg, 0,0);')
|
|
}
|
|
else {
|
|
p.genln('int $tmp2 = pthread_create(& $thread_name, NULL, $wrapper_name, $parg);')
|
|
}
|
|
p.check(.rpar)
|
|
}
|
|
|
|
fn (p mut Parser) fn_call(f Fn, method_ph int, receiver_var, receiver_type string) {
|
|
if !f.is_public && !f.is_c && !p.pref.is_test && !f.is_interface && f.mod != p.mod {
|
|
p.error('function `$f.name` is private')
|
|
}
|
|
p.calling_c = f.is_c
|
|
if f.is_c && !p.builtin_mod {
|
|
if f.name == 'free' {
|
|
p.error('use `free()` instead of `C.free()`')
|
|
} else if f.name == 'malloc' {
|
|
p.error('use `malloc()` instead of `C.malloc()`')
|
|
}
|
|
}
|
|
mut cgen_name := p.table.cgen_name(f)
|
|
p.next()
|
|
mut gen_type := ''
|
|
if p.tok == .lt {
|
|
p.check(.lt)
|
|
gen_type = p.check_name()
|
|
// `foo<Bar>()`
|
|
// If we are in the first pass, we need to add `Bar` type to the generic function `foo`,
|
|
// so that generic `foo`s body can be generated for each type in the second pass.
|
|
if p.first_pass() {
|
|
//println('registering $gen_type in $f.name')
|
|
p.table.register_generic_fn_type(f.name, gen_type)
|
|
// Function bodies are skipped in the first passed, we only need to register the generic type here.
|
|
return
|
|
}
|
|
cgen_name += '_' + gen_type
|
|
p.check(.gt)
|
|
}
|
|
// if p.pref.is_prof {
|
|
// p.cur_fn.called_fns << cgen_name
|
|
// }
|
|
// Normal function call
|
|
if !f.is_method {
|
|
p.gen(cgen_name)
|
|
p.gen('(')
|
|
// p.fgen(f.name)
|
|
}
|
|
// If we have a method placeholder,
|
|
// we need to preappend "method(receiver, ...)"
|
|
else {
|
|
mut method_call := '${cgen_name}('
|
|
receiver := f.args.first()
|
|
if receiver.is_mut && !p.expr_var.is_mut {
|
|
println('$method_call recv=$receiver.name recv_mut=$receiver.is_mut')
|
|
p.error('`$p.expr_var.name` is immutable')
|
|
}
|
|
if !p.expr_var.is_changed {
|
|
p.cur_fn.mark_var_changed(p.expr_var)
|
|
}
|
|
// if receiver is key_mut or a ref (&), generate & for the first arg
|
|
if receiver.ref || (receiver.is_mut && !receiver_type.contains('*')) {
|
|
method_call += '& /* ? */'
|
|
}
|
|
// generate deref (TODO copy pasta later in fn_call_args)
|
|
if !receiver.is_mut && receiver_type.contains('*') {
|
|
method_call += '*'
|
|
}
|
|
mut cast := ''
|
|
// Method returns (void*) => cast it to int, string, user etc
|
|
// number := *(int*)numbers.first()
|
|
if f.typ == 'void*' {
|
|
// array_int => int
|
|
cast = receiver_type.all_after('_')
|
|
cast = '*($cast*) '
|
|
}
|
|
p.cgen.set_placeholder(method_ph, '$cast $method_call')
|
|
}
|
|
// foo<Bar>()
|
|
p.fn_call_args(mut f)
|
|
p.gen(')')
|
|
p.calling_c = false
|
|
// println('end of fn call typ=$f.typ')
|
|
}
|
|
|
|
// for declaration
|
|
// return an updated Fn object with args[] field set
|
|
fn (p mut Parser) fn_args(f mut Fn) {
|
|
p.check(.lpar)
|
|
defer { p.check(.rpar) }
|
|
if f.is_interface {
|
|
int_arg := Var {
|
|
typ: f.receiver_typ
|
|
}
|
|
f.args << int_arg
|
|
}
|
|
// `(int, string, int)`
|
|
// Just register fn arg types
|
|
types_only := p.tok == .mul || (p.peek() == .comma && p.table.known_type(p.lit)) || p.peek() == .rpar// (int, string)
|
|
if types_only {
|
|
for p.tok != .rpar {
|
|
typ := p.get_type()
|
|
v := Var {
|
|
typ: typ
|
|
is_arg: true
|
|
// is_mut: is_mut
|
|
line_nr: p.scanner.line_nr
|
|
}
|
|
// f.register_var(v)
|
|
f.args << v
|
|
if p.tok == .comma {
|
|
p.next()
|
|
}
|
|
}
|
|
}
|
|
// `(a int, b, c string)` syntax
|
|
for p.tok != .rpar {
|
|
mut names := [
|
|
p.check_name()
|
|
]
|
|
// `a,b,c int` syntax
|
|
for p.tok == .comma {
|
|
p.check(.comma)
|
|
p.fspace()
|
|
names << p.check_name()
|
|
}
|
|
p.fspace()
|
|
is_mut := p.tok == .key_mut
|
|
if is_mut {
|
|
p.next()
|
|
}
|
|
mut typ := p.get_type()
|
|
if is_mut && is_primitive_type(typ) {
|
|
p.error('mutable arguments are only allowed for arrays, maps, and structs.' +
|
|
'\nreturn values instead: `foo(n mut int)` => `foo(n int) int`')
|
|
}
|
|
for name in names {
|
|
if !p.first_pass() && !p.table.known_type(typ) {
|
|
p.error('fn_args: unknown type $typ')
|
|
}
|
|
if is_mut {
|
|
typ += '*'
|
|
}
|
|
v := Var {
|
|
name: name
|
|
typ: typ
|
|
is_arg: true
|
|
is_mut: is_mut
|
|
ptr: is_mut
|
|
line_nr: p.scanner.line_nr
|
|
}
|
|
f.register_var(v)
|
|
f.args << v
|
|
}
|
|
if p.tok == .comma {
|
|
p.next()
|
|
}
|
|
if p.tok == .dotdot {
|
|
f.args << Var {
|
|
name: '..'
|
|
}
|
|
p.next()
|
|
}
|
|
}
|
|
}
|
|
|
|
// foo *(1, 2, 3, mut bar)*
|
|
fn (p mut Parser) fn_call_args(f mut Fn) *Fn {
|
|
// p.gen('(')
|
|
// println('fn_call_args() name=$f.name args.len=$f.args.len')
|
|
// C func. # of args is not known
|
|
// if f.name.starts_with('c_') {
|
|
p.check(.lpar)
|
|
if f.is_c {
|
|
for p.tok != .rpar {
|
|
p.bool_expression()
|
|
if p.tok == .comma {
|
|
p.gen(', ')
|
|
p.check(.comma)
|
|
}
|
|
}
|
|
p.check(.rpar)
|
|
return f
|
|
}
|
|
// add debug information to panic when -debug arg is passed
|
|
if p.v.pref.is_debug && f.name == 'panic' {
|
|
mod_name := p.mod.replace('_dot_', '.')
|
|
fn_name := p.cur_fn.name.replace('${p.mod}__', '')
|
|
file_path := p.file_path.replace('\\', '\\\\') // escape \
|
|
p.cgen.resetln(p.cgen.cur_line.replace(
|
|
'v_panic (',
|
|
'_panic_debug ($p.scanner.line_nr, tos2("$file_path"), tos2("$mod_name"), tos2("$fn_name"), '
|
|
))
|
|
}
|
|
// Receiver - first arg
|
|
for i, arg in f.args {
|
|
// println('$i) arg=$arg.name')
|
|
// Skip receiver, because it was already generated in the expression
|
|
if i == 0 && f.is_method {
|
|
if f.args.len > 1 {
|
|
p.gen(',')
|
|
}
|
|
continue
|
|
}
|
|
// Reached the final vararg? Quit
|
|
if i == f.args.len - 1 && arg.name == '..' {
|
|
break
|
|
}
|
|
ph := p.cgen.add_placeholder()
|
|
// `)` here means that not enough args were provided
|
|
if p.tok == .rpar {
|
|
str_args := f.str_args(p.table)// TODO this is C args
|
|
p.error('not enough arguments in call to `$f.name ($str_args)`')
|
|
}
|
|
// If `arg` is mutable, the caller needs to provide `mut`:
|
|
// `mut numbers := [1,2,3]; reverse(mut numbers);`
|
|
if arg.is_mut {
|
|
if p.tok != .key_mut {
|
|
p.error('`$arg.name` is a key_mut argument, you need to provide `mut`: `$f.name(...mut a...)`')
|
|
}
|
|
if p.peek() != .name {
|
|
p.error('`$arg.name` is a key_mut argument, you need to provide a variable to modify: `$f.name(... mut a...)`')
|
|
}
|
|
p.check(.key_mut)
|
|
var_name := p.lit
|
|
v := p.cur_fn.find_var(var_name)
|
|
if v.name == '' {
|
|
p.error('`$arg.name` is a key_mut argument, you need to provide a variable to modify: `$f.name(... mut a...)`')
|
|
}
|
|
if !v.is_changed {
|
|
p.cur_fn.mark_var_changed(v)
|
|
}
|
|
}
|
|
p.expected_type = arg.typ
|
|
typ := p.bool_expression()
|
|
// Optimize `println`: replace it with `printf` to avoid extra allocations and
|
|
// function calls. `println(777)` => `printf("%d\n", 777)`
|
|
// (If we don't check for void, then V will compile `println(func())`)
|
|
if i == 0 && f.name == 'println' && typ != 'string' && typ != 'void' {
|
|
T := p.table.find_type(typ)
|
|
$if !windows {
|
|
fmt := p.typ_to_fmt(typ, 0)
|
|
if fmt != '' {
|
|
p.cgen.resetln(p.cgen.cur_line.replace('println (', '/*opt*/printf ("' + fmt + '\\n", '))
|
|
continue
|
|
}
|
|
}
|
|
if typ.ends_with('*') {
|
|
p.cgen.set_placeholder(ph, 'ptr_str(')
|
|
p.gen(')')
|
|
continue
|
|
}
|
|
// Make sure this type has a `str()` method
|
|
if !T.has_method('str') {
|
|
error_msg := ('`$typ` needs to have method `str() string` to be printable')
|
|
if T.fields.len > 0 {
|
|
mut index := p.cgen.cur_line.len - 1
|
|
for index > 0 && p.cgen.cur_line[index] != ` ` { index-- }
|
|
name := p.cgen.cur_line.right(index + 1)
|
|
if name == '}' {
|
|
p.error(error_msg)
|
|
}
|
|
p.cgen.resetln(p.cgen.cur_line.left(index))
|
|
p.scanner.create_type_string(T, name)
|
|
p.cgen.cur_line.replace(typ, '')
|
|
p.next()
|
|
return p.fn_call_args(mut f)
|
|
}
|
|
p.error(error_msg)
|
|
}
|
|
p.cgen.set_placeholder(ph, '${typ}_str(')
|
|
p.gen(')')
|
|
continue
|
|
}
|
|
got := typ
|
|
expected := arg.typ
|
|
// println('fn arg got="$got" exp="$expected"')
|
|
if !p.check_types_no_throw(got, expected) {
|
|
mut err := 'Fn "$f.name" wrong arg #${i+1}. '
|
|
err += 'Expected "$arg.typ" ($arg.name) but got "$typ"'
|
|
p.error(err)
|
|
}
|
|
is_interface := p.table.is_interface(arg.typ)
|
|
// Add `&` or `*` before an argument?
|
|
if !is_interface {
|
|
// Dereference
|
|
if got.contains('*') && !expected.contains('*') {
|
|
p.cgen.set_placeholder(ph, '*')
|
|
}
|
|
// Reference
|
|
// TODO ptr hacks. DOOM hacks, fix please.
|
|
if !got.contains('*') && expected.contains('*') && got != 'voidptr' {
|
|
// Special case for mutable arrays. We can't `&` function results,
|
|
// have to use `(array[]){ expr }` hack.
|
|
if expected.starts_with('array_') && expected.ends_with('*') {
|
|
p.cgen.set_placeholder(ph, '& /*111*/ (array[]){')
|
|
p.gen('} ')
|
|
}
|
|
// println('\ne:"$expected" got:"$got"')
|
|
else if ! (expected == 'void*' && got == 'int') &&
|
|
! (expected == 'byte*' && got.contains(']byte')) &&
|
|
! (expected == 'byte*' && got == 'string') {
|
|
p.cgen.set_placeholder(ph, '& /*112 EXP:"$expected" GOT:"$got" */')
|
|
}
|
|
}
|
|
}
|
|
// interface?
|
|
if is_interface {
|
|
if !got.contains('*') {
|
|
p.cgen.set_placeholder(ph, '&')
|
|
}
|
|
// Pass all interface methods
|
|
interface_type := p.table.find_type(arg.typ)
|
|
for method in interface_type.methods {
|
|
p.gen(', ${typ}_${method.name} ')
|
|
}
|
|
}
|
|
// Check for commas
|
|
if i < f.args.len - 1 {
|
|
// Handle 0 args passed to varargs
|
|
is_vararg := i == f.args.len - 2 && f.args[i + 1].name == '..'
|
|
if p.tok != .comma && !is_vararg {
|
|
p.error('wrong number of arguments for $i,$arg.name fn `$f.name`: expected $f.args.len, but got less')
|
|
}
|
|
if p.tok == .comma {
|
|
p.fgen(', ')
|
|
}
|
|
if !is_vararg {
|
|
p.next()
|
|
p.gen(',')
|
|
}
|
|
}
|
|
}
|
|
// varargs
|
|
if f.args.len > 0 {
|
|
last_arg := f.args.last()
|
|
if last_arg.name == '..' {
|
|
for p.tok != .rpar {
|
|
if p.tok == .comma {
|
|
p.gen(',')
|
|
p.check(.comma)
|
|
}
|
|
p.bool_expression()
|
|
}
|
|
}
|
|
}
|
|
if p.tok == .comma {
|
|
p.error('wrong number of arguments for fn `$f.name`: expected $f.args.len, but got more')
|
|
}
|
|
p.check(.rpar)
|
|
// p.gen(')')
|
|
}
|
|
|
|
// "fn (int, string) int"
|
|
fn (f Fn) typ_str() string {
|
|
mut sb := strings.new_builder(50)
|
|
sb.write('fn (')
|
|
for i, arg in f.args {
|
|
sb.write(arg.typ)
|
|
if i < f.args.len - 1 {
|
|
sb.write(',')
|
|
}
|
|
}
|
|
sb.write(')')
|
|
if f.typ != 'void' {
|
|
sb.write(' $f.typ')
|
|
}
|
|
return sb.str()
|
|
}
|
|
|
|
// f.args => "int a, string b"
|
|
fn (f &Fn) str_args(table *Table) string {
|
|
mut s := ''
|
|
for i, arg in f.args {
|
|
// Interfaces are a special case. We need to pass the object + pointers
|
|
// to all methods:
|
|
// fn handle(r Runner) { =>
|
|
// void handle(void *r, void (*Runner_run)(void*)) {
|
|
if table.is_interface(arg.typ) {
|
|
// First the object (same name as the interface argument)
|
|
s += ' void* $arg.name'
|
|
// Now all methods
|
|
interface_type := table.find_type(arg.typ)
|
|
for method in interface_type.methods {
|
|
s += ', $method.typ (*${arg.typ}_${method.name})(void*'
|
|
if method.args.len > 1 {
|
|
for a in method.args.right(1) {
|
|
s += ', $a.typ'
|
|
}
|
|
}
|
|
s += ')'
|
|
}
|
|
}
|
|
else if arg.name == '..' {
|
|
s += '...'
|
|
}
|
|
else {
|
|
// s += '$arg.typ $arg.name'
|
|
s += table.cgen_name_type_pair(arg.name, arg.typ)// '$arg.typ $arg.name'
|
|
}
|
|
if i < f.args.len - 1 {
|
|
s += ', '
|
|
}
|
|
}
|
|
return s
|
|
}
|