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compiler: small fixes + some logic for freeing strings

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This commit is contained in:
Alexander Medvednikov 2019-09-24 22:30:30 +03:00
parent b1f0df0fd1
commit 04e4018228
8 changed files with 78 additions and 45 deletions
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44
compiler/fn.v
View File

@ -89,6 +89,17 @@ fn (p mut Parser) mark_var_changed(v Var) {
p.local_vars[v.idx].is_changed = true
}
fn (p mut Parser) mark_arg_moved(v Var) {
for i, arg in p.cur_fn.args {
if arg.name == v.name {
//println('setting f $p.cur_fn.name arg $arg.name to is_mut')
p.cur_fn.args[i].is_moved = true
break
}
}
p.table.fns[p.cur_fn.name] = p.cur_fn
}
fn (p mut Parser) known_var(name string) bool {
_ = p.find_var(name) or {
return false
@ -759,7 +770,7 @@ fn (p mut Parser) fn_args(f mut Fn) {
if is_mut {
typ += '*'
}
v := Var {
v := Var{
name: name
typ: typ
is_arg: true
@ -775,7 +786,7 @@ fn (p mut Parser) fn_args(f mut Fn) {
p.next()
}
if p.tok == .dotdot {
f.args << Var {
f.args << Var{
name: '..'
}
p.next()
@ -818,10 +829,9 @@ fn (p mut Parser) fn_call_args(f mut Fn) &Fn {
'_panic_debug ($p.scanner.line_nr, tos2((byte *)"$file_path"), tos2((byte *)"$mod_name"), tos2((byte *)"$fn_name"), '
))
}
// Receiver - first arg
for i, arg in f.args {
// println('$i) arg=$arg.name')
// Skip receiver, because it was already generated in the expression
// Receiver is the first arg
// Skip the receiver, because it was already generated in the expression
if i == 0 && f.is_method {
if f.args.len > 1 && !p.is_js {
p.gen(',')
@ -865,7 +875,14 @@ fn (p mut Parser) fn_call_args(f mut Fn) &Fn {
}
}
p.expected_type = arg.typ
clone := p.pref.autofree && arg.typ == 'string' && arg.is_moved && p.mod != 'builtin'
if clone {
p.gen('/*YY f=$f.name arg=$arg.name is_moved=$arg.is_moved*/string_clone(')
}
mut typ := p.bool_expression()
if clone {
p.gen(')')
}
// Optimize `println`: replace it with `printf` to avoid extra allocations and
// function calls.
// `println(777)` => `printf("%d\n", 777)`
@ -927,9 +944,20 @@ fn (p mut Parser) fn_call_args(f mut Fn) &Fn {
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 "$typ"'
p.error(err)
mut j := i
if f.is_method {
j--
}
mut nr := '${i+1}th'
if j == 0 {
nr = 'first'
} else if j == 1 {
nr = 'second'
} else if j == 2 {
nr = 'third'
}
p.error('cannot use type `$typ` as type `$arg.typ` in $nr ' +
'argument to `$f.name()`')
}
is_interface := p.table.is_interface(arg.typ)
// Add `&` or `*` before an argument?

13
compiler/gen_c.v
View File

@ -479,22 +479,23 @@ fn type_default(typ string) string {
return '{0}'
}
fn (p mut Parser) gen_array_push(ph int, typ, expr_type, tmp, tmp_typ string) {
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, 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 tmp_typ.ends_with('*') {
p.gen('), $tmp, ${tmp_typ.left(tmp_typ.len - 1)})')
if elm_type.ends_with('*') {
p.gen('), $tmp, ${elm_type.left(elm_type.len - 1)})')
} else {
p.gen('), $tmp, $tmp_typ)')
p.gen('), $tmp, $elm_type)')
}
}
}

10
compiler/main.v
View File

@ -241,7 +241,7 @@ fn (v mut V) compile() {
for file in v.files {
mut p := v.new_parser(file)
p.parse(.decl)
if p.pref.autofree { p.scanner.text.free() free(p.scanner) }
//if p.pref.autofree { p.scanner.text.free() free(p.scanner) }
}
// Main pass
cgen.pass = Pass.main
@ -307,7 +307,7 @@ fn (v mut V) compile() {
for file in v.files {
mut p := v.new_parser(file)
p.parse(.main)
if p.pref.autofree { p.scanner.text.free() free(p.scanner) }
//if p.pref.autofree { p.scanner.text.free() free(p.scanner) }
// p.g.gen_x64()
// Format all files (don't format automatically generated vlib headers)
if !v.pref.nofmt && !file.contains('/vlib/') {
@ -569,13 +569,13 @@ fn (v mut V) add_v_files_to_compile() {
for file in v.files {
mut p := v.new_parser(file)
p.parse(.imports)
if p.pref.autofree { p.scanner.text.free() free(p.scanner) }
//if p.pref.autofree { p.scanner.text.free() free(p.scanner) }
}
// Parse user imports
for file in user_files {
mut p := v.new_parser(file)
p.parse(.imports)
if p.pref.autofree { p.scanner.text.free() free(p.scanner) }
//if p.pref.autofree { p.scanner.text.free() free(p.scanner) }
}
// Parse lib imports
/*
@ -614,7 +614,7 @@ fn (v mut V) add_v_files_to_compile() {
for file in vfiles {
mut p := v.new_parser(file)
p.parse(.imports)
if p.pref.autofree { p.scanner.text.free() free(p.scanner) }
//if p.pref.autofree { p.scanner.text.free() free(p.scanner) }
}
}
if v.pref.is_verbose {

36
compiler/parser.v
View File

@ -13,9 +13,10 @@ struct Parser {
file_path string // "/home/user/hello.v"
file_name string // "hello.v"
file_platform string // ".v", "_win.v", "_nix.v", "_mac.v", "_lin.v" ...
file_pcguard string // When p.file_pcguard != '', it contains a
// C ifdef guard clause that must be put before
// the #include directives in the parsed .v file
// When p.file_pcguard != '', it contains a
// C ifdef guard clause that must be put before
// the #include directives in the parsed .v file
file_pcguard string
v &V
pref &Preferences // Preferences shared from V struct
mut:
@ -36,7 +37,7 @@ mut:
expr_var Var
has_immutable_field bool
first_immutable_field Var
assigned_type string
assigned_type string // non-empty if we are in an assignment expression
expected_type string
tmp_cnt int
is_script bool
@ -74,7 +75,7 @@ mut:
}
const (
EmptyFn = Fn { }
EmptyFn = Fn{}
MainFn= Fn{name:'main'}
)
@ -712,6 +713,7 @@ fn (p mut Parser) enum_decl(_enum_name string) {
if p.tok == .comma {
p.next()
}
// !!!! NAME free
p.table.register_const(name, enum_name, p.mod)
val++
}
@ -968,7 +970,7 @@ fn (p mut Parser) get_type() string {
typ = p.lit
}
else {
if warn {
if warn && p.mod != 'ui' {
p.warn('use `&Foo` instead of `*Foo`')
}
// Module specified? (e.g. gx.Image)
@ -1119,7 +1121,7 @@ fn (p mut Parser) close_scope() {
break
}
// Clean up memory, only do this if -autofree was passed for now
if p.pref.autofree && v.is_alloc && !p.pref.is_test {
if p.pref.autofree && v.is_alloc { // && !p.pref.is_test {
mut free_fn := 'free'
if v.typ.starts_with('array_') {
free_fn = 'v_array_free'
@ -1136,6 +1138,7 @@ fn (p mut Parser) close_scope() {
continue
}
if p.returns {
// Don't free a variable that's being returned
if !v.is_returned && v.typ != 'FILE*' { //!v.is_c {
prev_line := p.cgen.lines[p.cgen.lines.len-2]
p.cgen.lines[p.cgen.lines.len-2] =
@ -1608,6 +1611,11 @@ fn (p mut Parser) name_expr() string {
else if deref {
p.gen('*')
}
if p.pref.autofree && v.typ == 'string' && v.is_arg &&
p.assigned_type == 'string' {
p.warn('setting moved ' + v.typ)
p.mark_arg_moved(v)
}
mut typ := p.var_expr(v)
// *var
if deref {
@ -2108,11 +2116,7 @@ fn (p mut Parser) index_expr(typ_ string, fn_ph int) string {
}
// TODO move this from index_expr()
// TODO if p.tok in ...
// if p.tok in [.assign, .plus_assign, .minus_assign]
if (p.tok == .assign && !p.is_sql) || p.tok == .plus_assign || p.tok == .minus_assign ||
p.tok == .mult_assign || p.tok == .div_assign || p.tok == .xor_assign || p.tok == .mod_assign ||
p.tok == .or_assign || p.tok == .and_assign || p.tok == .righ_shift_assign ||
p.tok == .left_shift_assign {
if (p.tok == .assign && !p.is_sql) || p.tok.is_assign() {
if is_indexer && is_str && !p.builtin_mod {
p.error('strings are immutable')
}
@ -2219,8 +2223,14 @@ fn (p mut Parser) expression() string {
if !p.expr_var.is_changed {
p.mark_var_changed(p.expr_var)
}
p.gen('/*typ = $typ tmp_typ=$tmp_typ*/')
ph_clone := p.cgen.add_placeholder()
expr_type := p.expression()
// Two arrays of the same type?
// Need to clone the string when appending it to an array?
if p.pref.autofree && typ == 'array_string' && expr_type == 'string' {
p.cgen.set_placeholder(ph_clone, 'string_clone(')
p.gen(')')
}
p.gen_array_push(ph, typ, expr_type, tmp, tmp_typ)
return 'void'
}

9
compiler/scanner.v
View File

@ -57,16 +57,12 @@ fn new_scanner(file_path string) &Scanner {
}
}
text := raw_text
scanner := &Scanner {
return &Scanner {
file_path: file_path
text: text
text: raw_text
fmt_out: strings.new_builder(1000)
should_print_line_on_error: true
}
return scanner
}
@ -670,6 +666,7 @@ fn (s &Scanner) error(msg string) {
// and jump to their source with a keyboard shortcut.
// Using only the filename leads to inability of IDE/editors
// to find the source file, when it is in another folder.
//println('${s.file_path}:${s.line_nr + 1}:${column+1}: $msg')
println('${fullpath}:${s.line_nr + 1}:${column+1}: $msg')
exit(1)
}

5
compiler/table.v
View File

@ -80,7 +80,7 @@ mut:
is_changed bool
scope_level int
is_c bool // todo remove once `typ` is `Type`, not string
moved bool
is_moved bool
scanner_pos ScannerPos // TODO: use only scanner_pos, remove line_nr
line_nr int
}
@ -321,7 +321,8 @@ fn (table &Table) known_type(typ_ string) bool {
}
fn (table &Table) known_type_fast(t &Type) bool {
return t.name.len > 0 && !t.is_placeholder
return t.name != '' && !t.is_placeholder
}
fn (t &Table) find_fn(name string) ?Fn {

1
september.plan
View File

@ -26,7 +26,6 @@
- ui demo: calculator
- declarative ui with hot reload (similar to swiftui)
- "building a simple blog with vweb" tutorial + youtube video
- webassembly backend (via emscripten)
+ javascript backend
- new playground with a v compiler running in the browser
+ o(log n) type lookup

5
vlib/darwin/darwin.v
View File

@ -6,8 +6,7 @@ module darwin
struct C.NSString { }
// macOS and iOS helpers
pub fn nsstring(s string) *NSString {
// #return @"" ;
pub fn nsstring(s string) *C.NSString {
// println('ns $s len=$s.len')
# return [ [ NSString alloc ] initWithBytesNoCopy:s.str length:s.len
# encoding:NSUTF8StringEncoding freeWhenDone: false];
@ -16,7 +15,5 @@ pub fn nsstring(s string) *NSString {
//ns := C.alloc_NSString()
//return ns.initWithBytesNoCopy(s.str, length: s.len,
//encoding: NSUTF8StringEncoding, freeWhenDone: false)
}