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v/compiler/main.v
Alexander Medvednikov a1b6e4e523 V 0.1.1
2019-06-25 02:07:32 +02:00

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// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
module main
import os
import time
const (
Version = '0.1.1'
)
// TODO no caps
enum BuildMode {
// `v program.v'
// Build user code only, and add pre-compiled vlib (`cc program.o builtin.o os.o...`)
DEFAULT_MODE
// `v -embed_vlib program.v`
// vlib + user code in one file (slower compilation, but easier when working on vlib and cross-compiling)
EMBED_VLIB
// `v -lib ~/v/os`
// build any module (generate os.o + os.vh)
BUILD // TODO a better name would be smth like `.build_module` I think
}
fn vtmp_path() string {
return os.home_dir() + '/.vlang/'
}
const (
SupportedPlatforms = ['windows', 'mac', 'linux']
TmpPath = vtmp_path()
)
enum Os {
MAC
LINUX
WINDOWS
}
enum Pass {
// A very short pass that only looks at imports in the begginning of each file
RUN_IMPORTS
// First pass, only parses and saves declarations (fn signatures, consts, types).
// Skips function bodies.
// We need this because in V things can be used before they are declared.
RUN_DECLS
// Second pass, parses function bodies and generates C or machine code.
RUN_MAIN
}
/*
// TODO rename to:
enum Pass {
imports
decls
main
}
*/
struct V {
mut:
build_mode BuildMode
os Os // the OS to build for
nofmt bool // disable vfmt
out_name_c string // name of the temporary C file
files []string // all V files that need to be parsed and compiled
dir string // directory (or file) being compiled (TODO rename to path?)
table *Table // table with types, vars, functions etc
cgen *CGen // C code generator
is_test bool // `v test string_test.v`
is_script bool // single file mode (`v program.v`), `fn main(){}` can be skipped
is_so bool
is_live bool // for hot code reloading
is_prof bool // benchmark every function
translated bool // `v translated doom.v` are we running V code translated from C? allow globals, ++ expressions, etc
obfuscate bool // `v -obf program.v`, renames functions to "f_XXX"
lang_dir string // "~/code/v"
is_verbose bool // print extra information with `v.log()`
is_run bool // `v run program.v`
is_play bool // playground mode
show_c_cmd bool // `v -show_c_cmd` prints the C command to build program.v.c
sanitize bool // use Clang's new "-fsanitize" option
out_name string // "program.exe"
is_prod bool // use "-O2" and skip printlns (TODO I don't thik many people want printlns to disappear in prod buidls)
is_repl bool
}
fn main() {
// There's no `flags` module yet, so args have to be parsed manually
args := os.args
// Print the version and exit.
if 'version' in args {
println('V $Version')
return
}
if '-h' in args || '--help' in args || 'help' in args {
println(HelpText)
return
}
if 'translate' in args {
println('Translating C to V will be available in V 0.3')
return
}
// TODO quit if the compiler is too old
// u := os.file_last_mod_unix('/var/tmp/alex')
// Create a temp directory if it's not there.
if !os.file_exists(TmpPath) {
os.mkdir(TmpPath)
}
// If there's no tmp path with current version yet, the user must be using a pre-built package
// Copy the `vlib` directory to the tmp path.
/*
// TODO
if !os.file_exists(TmpPath) && os.file_exists('vlib') {
}
*/
// Just fmt and exit
if args.contains('fmt') {
file := args.last()
if !os.file_exists(file) {
println('"$file" does not exist')
exit(1)
}
if !file.ends_with('.v') {
println('v fmt can only be used on .v files')
exit(1)
}
println('vfmt is temporarily disabled')
return
}
// V with no args? REPL
if args.len < 2 {
run_repl()
return
}
// Construct the V object from command line arguments
mut c := new_v(args)
if c.is_verbose {
println(args)
}
// Generate the docs and exit
if args.contains('doc') {
// c.gen_doc_html_for_module(args.last())
exit(0)
}
c.compile()
}
fn (c mut V) compile() {
mut cgen := c.cgen
cgen.genln('// Generated by V')
// Add user files to compile
c.add_user_v_files()
if c.is_verbose {
println('all .v files:')
println(c.files)
}
// First pass (declarations)
for file in c.files {
mut p := c.new_parser(file, RUN_DECLS)
p.parse()
}
// Main pass
cgen.run = RUN_MAIN
if c.is_play {
cgen.genln('#define VPLAY (1) ')
}
cgen.genln('
#include <stdio.h> // TODO remove all these includes, define all function signatures and types manually
#include <stdlib.h>
#include <signal.h>
#include <stdarg.h> // for va_list
#include <inttypes.h> // int64_t etc
#ifdef __linux__
#include <pthread.h>
#endif
#ifdef __APPLE__
#endif
#ifdef _WIN32
#include <windows.h>
//#include <WinSock2.h>
#endif
//================================== TYPEDEFS ================================*/
typedef unsigned char byte;
typedef unsigned int uint;
typedef int64_t i64;
typedef int32_t i32;
typedef int16_t i16;
typedef int8_t i8;
typedef uint64_t u64;
typedef uint32_t u32;
typedef uint16_t u16;
typedef uint8_t u8;
typedef uint32_t rune;
typedef float f32;
typedef double f64;
typedef unsigned char* byteptr;
typedef int* intptr;
typedef void* voidptr;
typedef struct array array;
typedef struct map map;
typedef array array_string;
typedef array array_int;
typedef array array_byte;
typedef array array_uint;
typedef array array_float;
typedef map map_int;
typedef map map_string;
#ifndef bool
typedef int bool;
#define true 1
#define false 0
#endif
//============================== HELPER C MACROS =============================*/
#define _PUSH(arr, val, tmp, tmp_typ) {tmp_typ tmp = (val); array__push(arr, &tmp);}
#define _IN(typ, val, arr) array_##typ##_contains(arr, val)
#define ALLOC_INIT(type, ...) (type *)memdup((type[]){ __VA_ARGS__ }, sizeof(type))
#define UTF8_CHAR_LEN( byte ) (( 0xE5000000 >> (( byte >> 3 ) & 0x1e )) & 3 ) + 1
//================================== GLOBALS =================================*/
//int V_ZERO = 0;
byteptr g_str_buf;
int load_so(byteptr);
void reload_so();
void init_consts();')
imports_json := c.table.imports.contains('json')
// TODO remove global UI hack
if c.os == MAC && ((c.build_mode == EMBED_VLIB && c.table.imports.contains('ui')) ||
(c.build_mode == BUILD && c.dir.contains('/ui'))) {
cgen.genln('id defaultFont = 0; // main.v')
}
// TODO remove ugly .c include once V has its own json parser
// Embed cjson either in embedvlib or in json.o
if imports_json && c.build_mode == EMBED_VLIB ||
(c.build_mode == BUILD && c.out_name.contains('json.o')) {
cgen.genln('#include "cJSON.c" ')
}
// We need the cjson header for all the json decoding user will do in default mode
if c.build_mode == DEFAULT_MODE {
if imports_json {
cgen.genln('#include "cJSON.h"')
}
}
if c.build_mode == EMBED_VLIB || c.build_mode == DEFAULT_MODE {
// If we declare these for all modes, then when running `v a.v` we'll get
// `/usr/bin/ld: multiple definition of 'total_m'`
cgen.genln('i64 total_m = 0; // For counting total RAM allocated')
cgen.genln('int g_test_ok = 1; ')
if c.table.imports.contains('json') {
cgen.genln('
#define js_get(object, key) cJSON_GetObjectItemCaseSensitive((object), (key))
')
}
}
if os.args.contains('-debug_alloc') {
cgen.genln('#define DEBUG_ALLOC 1')
}
cgen.genln('/*================================== FNS =================================*/')
cgen.genln('this line will be replaced with definitions')
defs_pos := cgen.lines.len - 1
for file in c.files {
mut p := c.new_parser(file, RUN_MAIN)
p.parse()
// p.g.gen_x64()
// Format all files (don't format automatically generated vlib headers)
if !c.nofmt && !file.contains('/vlib/') {
// new vfmt is not ready yet
}
}
c.log('Done parsing.')
// Write everything
mut d := new_string_builder(10000)// Just to avoid some unnecessary allocations
d.writeln(cgen.includes.join_lines())
d.writeln(cgen.typedefs.join_lines())
d.writeln(cgen.types.join_lines())
d.writeln('\nstring _STR(const char*, ...);\n')
d.writeln('\nstring _STR_TMP(const char*, ...);\n')
d.writeln(cgen.fns.join_lines())
d.writeln(cgen.consts.join_lines())
d.writeln(cgen.thread_args.join_lines())
if c.is_prof {
d.writeln('; // Prof counters:')
d.writeln(c.prof_counters())
}
dd := d.str()
cgen.lines.set(defs_pos, dd)// TODO `def.str()` doesn't compile
// if c.build_mode in [.default, .embed_vlib] {
if c.build_mode == DEFAULT_MODE || c.build_mode == EMBED_VLIB {
// vlib can't have `init_consts()`
cgen.genln('void init_consts() { g_str_buf=malloc(1000); ${cgen.consts_init.join_lines()} }')
// _STR function can't be defined in vlib
cgen.genln('
string _STR(const char *fmt, ...) {
va_list argptr;
va_start(argptr, fmt);
size_t len = vsnprintf(0, 0, fmt, argptr) + 1;
va_end(argptr);
byte* buf = malloc(len);
va_start(argptr, fmt);
vsprintf(buf, fmt, argptr);
va_end(argptr);
#ifdef DEBUG_ALLOC
puts("_STR:");
puts(buf);
#endif
return tos2(buf);
}
string _STR_TMP(const char *fmt, ...) {
va_list argptr;
va_start(argptr, fmt);
size_t len = vsnprintf(0, 0, fmt, argptr) + 1;
va_end(argptr);
va_start(argptr, fmt);
vsprintf(g_str_buf, fmt, argptr);
va_end(argptr);
#ifdef DEBUG_ALLOC
//puts("_STR_TMP:");
//puts(g_str_buf);
#endif
return tos2(g_str_buf);
}
')
}
// Make sure the main function exists
// Obviously we don't need it in libraries
if c.build_mode != BUILD {
if !c.table.main_exists() && !c.is_test {
// It can be skipped in single file programs
if c.is_script {
println('Generating main()...')
cgen.genln('int main() { $cgen.fn_main; return 0; }')
}
else {
println('panic: function `main` is undeclared in the main module')
}
}
// Generate `main` which calls every single test function
else if c.is_test {
cgen.genln('int main() { init_consts();')
for v in c.table.fns {
if v.name.starts_with('test_') {
cgen.genln('$v.name();')
}
}
cgen.genln('return g_test_ok == 0; }')
}
}
if c.is_live {
cgen.genln(' int load_so(byteptr path) {
printf("load_so %s\\n", path); dlclose(live_lib); live_lib = dlopen(path, RTLD_LAZY);
if (!live_lib) {puts("open failed"); exit(1); return 0;}
')
for so_fn in cgen.so_fns {
cgen.genln('$so_fn = dlsym(live_lib, "$so_fn"); ')
}
cgen.genln('return 1; }')
}
cgen.save()
c.log('flags=')
if c.is_verbose {
println(c.table.flags)
}
c.cc()
if c.is_test || c.is_run {
if true || c.is_verbose {
println('============running $c.out_name==============================')
}
cmd := if c.out_name.starts_with('/') {
c.out_name
}
else {
'./' + c.out_name
}
ret := os.system2(cmd)
if ret != 0 {
s := os.system(cmd)
println(s)
println('ret not 0, exiting')
exit(1)
}
}
}
fn (c mut V) cc() {
linux_host := os.user_os() == 'linux'
c.log('cc() isprod=$c.is_prod outname=$c.out_name')
mut a := ['-w']// arguments for the C compiler
flags := c.table.flags.join(' ')
/*
mut shared := ''
if c.is_so {
a << '-shared'// -Wl,-z,defs'
c.out_name = c.out_name + '.so'
}
*/
if c.is_prod {
a << '-O2'
}
else {
a << '-g'
}
mut libs := ''// builtin.o os.o http.o etc
if c.build_mode == BUILD {
a << '-c'
}
else if c.build_mode == EMBED_VLIB {
//
}
else if c.build_mode == DEFAULT_MODE {
libs = '$TmpPath/vlib/builtin.o'
if !os.file_exists(libs) {
println('`builtin.o` not found')
exit(1)
}
for imp in c.table.imports {
if imp == 'webview' {
continue
}
libs += ' $TmpPath/vlib/${imp}.o'
}
}
// -I flags
/*
mut args := ''
for flag in c.table.flags {
if !flag.starts_with('-l') {
args += flag
args += ' '
}
}
*/
if c.sanitize {
a << '-fsanitize=leak'
}
// Cross compiling linux
sysroot := '/Users/alex/tmp/lld/linuxroot/'
if c.os == LINUX && !linux_host {
// Build file.o
a << '-c --sysroot=$sysroot -target x86_64-linux-gnu'
// Right now `out_name` can be `file`, not `file.o`
if !c.out_name.ends_with('.o') {
c.out_name = c.out_name + '.o'
}
}
// Cross compiling windows
// sysroot := '/Users/alex/tmp/lld/linuxroot/'
// Output executable name
// else {
a << '-o $c.out_name'
// The C file we are compiling
a << '$TmpPath/$c.out_name_c'
// }
// Min macos version is mandatory I think?
if c.os == MAC {
a << '-mmacosx-version-min=10.7'
}
a << flags
a << libs
// macOS code can include objective C TODO remove once objective C is replaced with C
if c.os == MAC {
a << '-x objective-c'
}
// Without these libs compilation will fail on Linux
if c.os == LINUX && c.build_mode != BUILD {
a << '-lm -ldl -lpthread'
}
// Find clang executable
fast_clang := '/usr/local/Cellar/llvm/8.0.0/bin/clang'
args := a.join(' ')
cmd := if os.file_exists(fast_clang) {
'$fast_clang -I. $args'
}
else {
'cc -I. $args'
}
// Print the C command
if c.show_c_cmd || c.is_verbose {
println('\n==========\n$cmd\n=========\n')
}
// Run
res := os.system(cmd)
// println('C OUTPUT:')
if res.contains('error: ') {
println(res)
panic('clang error')
}
// Link it if we are cross compiling and need an executable
if c.os == LINUX && !linux_host && c.build_mode != BUILD {
c.out_name = c.out_name.replace('.o', '')
obj_file := c.out_name + '.o'
println('linux obj_file=$obj_file out_name=$c.out_name')
ress := os.system('/usr/local/Cellar/llvm/8.0.0/bin/ld.lld --sysroot=$sysroot ' +
'-v -o $c.out_name ' +
'-m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 ' +
'/usr/lib/x86_64-linux-gnu/crt1.o ' +
'$sysroot/lib/x86_64-linux-gnu/libm-2.28.a ' +
'/usr/lib/x86_64-linux-gnu/crti.o ' +
obj_file +
' /usr/lib/x86_64-linux-gnu/libc.so ' +
'/usr/lib/x86_64-linux-gnu/crtn.o')
println(ress)
if ress.contains('error:') {
os.exit(1)
}
println('linux cross compilation done. resulting binary: "$c.out_name"')
}
// print_time('after gcc')
}
fn (c &V) v_files_from_dir(dir string) []string {
mut res := []string
if !os.file_exists(dir) {
panic('$dir doesn\'t exist')
} else if !os.dir_exists(dir) {
panic('$dir isn\'t a directory')
}
mut files := os.ls(dir)
if c.is_verbose {
println('v_files_from_dir ("$dir")')
}
// println(files.len)
// println(files)
files.sort()
for file in files {
c.log('F=$file')
if !file.ends_with('.v') && !file.ends_with('.vh') {
continue
}
if file.ends_with('_test.v') {
continue
}
if file.ends_with('_win.v') && c.os != WINDOWS {
continue
}
if file.ends_with('_lin.v') && c.os != LINUX {
continue
}
if file.ends_with('_mac.v') && c.os != MAC {
lin_file := file.replace('_mac.v', '_lin.v')
// println('lin_file="$lin_file"')
// If there are both _mac.v and _lin.v, don't use _mac.v
if os.file_exists('$dir/$lin_file') {
continue
}
else if c.os == WINDOWS {
continue
}
else {
// If there's only _mac.v, then it can be used on Linux too
}
}
res << '$dir/$file'
}
return res
}
// Parses imports, adds necessary libs, and then user files
fn (c mut V) add_user_v_files() {
mut dir := c.dir
c.log('add_v_files($dir)')
// Need to store user files separately, because they have to be added after libs, but we dont know
// which libs need to be added yet
mut user_files := []string
// v volt/slack_test.v: compile all .v files to get the environment
// I need to implement user packages! TODO
is_test_with_imports := dir.ends_with('_test.v') &&
(dir.contains('/volt') || dir.contains('/c2volt'))// TODO
if is_test_with_imports {
user_files << dir
pos := dir.last_index('/')
dir = dir.left(pos) + '/'// TODO WHY IS THIS NEEDED?
}
if dir.ends_with('.v') {
// Just compile one file and get parent dir
user_files << dir
dir = dir.all_before('/')
}
else {
// Add files from the dir user is compiling (only .v files)
files := c.v_files_from_dir(dir)
for file in files {
user_files << file
}
}
if user_files.len == 0 {
println('No input .v files')
exit(1)
}
if c.is_verbose {
c.log('user_files:')
println(user_files)
}
// Parse user imports
for file in user_files {
mut p := c.new_parser(file, RUN_IMPORTS)
p.parse()
}
// Parse lib imports
if c.build_mode == DEFAULT_MODE {
for i := 0; i < c.table.imports.len; i++ {
pkg := c.table.imports[i]
vfiles := c.v_files_from_dir('$TmpPath/vlib/$pkg')
// Add all imports referenced by these libs
for file in vfiles {
mut p := c.new_parser(file, RUN_IMPORTS)
p.parse()
}
}
}
else {
// TODO this used to crash compiler?
// for pkg in c.table.imports {
for i := 0; i < c.table.imports.len; i++ {
pkg := c.table.imports[i]
// mut import_path := '$c.lang_dir/$pkg'
vfiles := c.v_files_from_dir('$c.lang_dir/$pkg')
// Add all imports referenced by these libs
for file in vfiles {
mut p := c.new_parser(file, RUN_IMPORTS)
p.parse()
}
}
}
if c.is_verbose {
c.log('imports:')
println(c.table.imports)
}
// Only now add all combined lib files
for pkg in c.table.imports {
mut module_path := '$c.lang_dir/$pkg'
// If we are in default mode, we don't parse vlib .v files, but header .vh files in
// TmpPath/vlib
// These were generated by vfmt
if c.build_mode == DEFAULT_MODE || c.build_mode == BUILD {
module_path = '$TmpPath/vlib/$pkg'
}
vfiles := c.v_files_from_dir(module_path)
for vfile in vfiles {
c.files << vfile
}
// TODO c.files.append_array(vfiles)
}
// Add user code last
for file in user_files {
c.files << file
}
// c.files.append_array(user_files)
}
fn get_arg(joined_args, arg, def string) string {
key := '-$arg '
mut pos := joined_args.index(key)
if pos == -1 {
return def
}
pos += key.len
mut space := joined_args.index_after(' ', pos)
if space == -1 {
space = joined_args.len
}
res := joined_args.substr(pos, space)
// println('get_arg($arg) = "$res"')
return res
}
fn (c &V) log(s string) {
if !c.is_verbose {
return
}
println(s)
}
fn new_v(args[]string) *V {
mut dir := args.last()
// println('new compiler "$dir"')
if args.len < 2 {
dir = ''
}
joined_args := args.join(' ')
target_os := get_arg(joined_args, 'os', '')
mut out_name := get_arg(joined_args, 'o', 'a.out')
// build mode
mut build_mode := DEFAULT_MODE
if args.contains('-lib') {
build_mode = BUILD
// v -lib ~/v/os => os.o
base := dir.all_after('/')
println('Building module ${base}...')
out_name = '$TmpPath/vlib/${base}.o'
// Cross compiling? Use separate dirs for each os
if target_os != os.user_os() {
os.mkdir('$TmpPath/vlib/$target_os')
out_name = '$TmpPath/vlib/$target_os/${base}.o'
println('Cross compiling $out_name')
}
}
// TODO embed_vlib is temporarily the default mode. It's much slower.
else if !args.contains('-embed_vlib') {
build_mode = EMBED_VLIB
}
//
is_test := dir.ends_with('_test.v')
is_script := dir.ends_with('.v')
if is_script && !os.file_exists(dir) {
println('`$dir` does not exist')
exit(1)
}
// No -o provided? foo.v => foo
if out_name == 'a.out' && dir.ends_with('.v') {
out_name = dir.left(dir.len - 2)
}
// if we are in `/foo` and run `v .`, the executable should be `foo`
if dir == '.' && out_name == 'a.out' {
base := os.getwd().all_after('/')
out_name = base.trim_space()
}
mut _os := MAC
// No OS specifed? Use current system
if target_os == '' {
$if linux {
_os = LINUX
}
$if mac {
_os = MAC
}
$if windows {
_os = WINDOWS
}
}
else {
switch target_os {
case 'linux': _os = LINUX
case 'windows': _os = WINDOWS
case 'mac': _os = MAC
}
}
builtins := [
'array.v',
'string.v',
'builtin.v',
'int.v',
'utf8.v',
'map.v',
'smap.v',
'option.v',
'string_builder.v',
]
// Location of all vlib files
mut lang_dir = ''
// First try fetching it from VROOT if it's defined
vroot_path := TmpPath + '/VROOT'
if os.file_exists(vroot_path) {
vroot := os.read_file(vroot_path).trim_space()
if os.dir_exists(vroot) && os.dir_exists(vroot + '/builtin') {
lang_dir = vroot
}
}
// no "~/.vlang/VROOT" file, so the user must be running V for the first
// time.
if lang_dir == '' {
println('Looks like you are running V for the first time.')
// The parent directory should contain vlib if V is run
// from "v/compiler"
cur_dir := os.getwd()
lang_dir = cur_dir.all_before_last('/')
if os.dir_exists('$lang_dir/builtin') {
println('Setting VROOT to "$lang_dir".')
os.write_file(TmpPath + '/VROOT', lang_dir)
} else {
println('Please do it from "v/compiler" directory.')
exit(1)
}
}
out_name_c := out_name.all_after('/') + '.c'
mut files := []string
// Add builtin files
if !out_name.contains('builtin.o') {
for builtin in builtins {
mut f := '$lang_dir/builtin/$builtin'
// In default mode we use precompiled vlib.o, point to .vh files with signatures
if build_mode == DEFAULT_MODE || build_mode == BUILD {
f = '$TmpPath/vlib/builtin/${builtin}h'
}
files << f
}
}
obfuscate := args.contains('-obf')
return &V {
os: _os
out_name: out_name
files: files
dir: dir
lang_dir: lang_dir
table: new_table(obfuscate)
out_name: out_name
out_name_c: out_name_c
is_test: is_test
is_script: is_script
is_so: args.contains('-shared')
is_play: args.contains('play')
is_prod: args.contains('-prod')
is_verbose: args.contains('-verbose')
obfuscate: obfuscate
is_prof: args.contains('-prof')
is_live: args.contains('-live')
sanitize: args.contains('-sanitize')
nofmt: args.contains('-nofmt')
show_c_cmd: args.contains('-show_c_cmd')
translated: args.contains('translated')
cgen: new_cgen(out_name_c)
build_mode: build_mode
is_run: args.contains('run')
is_repl: args.contains('-repl')
}
}
fn run_repl() []string {
println('V $Version')
println('Use Ctrl-D to exit')
println('For now you have to use println() to print values, this will be fixed soon\n')
file := TmpPath + '/vrepl.v'
mut lines := []string
for {
print('>>> ')
mut line := os.get_line().trim_space()
if line == '' {
break
}
// Save the source only if the user is printing something,
// but don't add this print call to the `lines` array,
// so that it doesn't get called during the next print.
if line.starts_with('print') {
// TODO remove this once files without main compile correctly
void_line := line.substr(line.index('(') + 1, line.len - 1)
lines << void_line
source_code := 'fn main(){' + lines.join('\n') + '\n' + line + '}'
os.write_file(file, source_code)
mut v := new_v( ['v', '-repl', file])
v.compile()
s := os.system(TmpPath + '/vrepl')
println(s)
}
else {
lines << line
}
}
return lines
}
// This definitely needs to be better :)
const (
HelpText = '
- Build a V program:
v file.v
- Get current V version:
v version
- Build an optimized executable:
v -prod file.v
- Specify the executable\'s name:
v -o program file.v
- Build and execute a V program:
v run file.v
- Obfuscate the resulting binary:
v -obf -prod build file.v
- Test:
v string_test.v
'
)
/*
- To disable automatic formatting:
v -nofmt file.v
- To build a program with an embedded vlib (use this if you do not have prebuilt vlib libraries or if you
are working on vlib)
v -embed_vlib file.v
*/
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