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v/compiler/table.v

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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.
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module main
import math
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import strings
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struct Table {
mut:
types []Type
consts []Var
fns map[string]Fn
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generic_fns []GenTable //map[string]GenTable // generic_fns['listen_and_serve'] == ['Blog', 'Forum']
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obf_ids map[string]int // obf_ids['myfunction'] == 23
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packages []string // List of all modules registered by the application
imports []string // List of all imports
flags []string // ['-framework Cocoa', '-lglfw3']
fn_cnt int atomic
obfuscate bool
}
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struct GenTable {
fn_name string
types []string
}
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// Holds import information scoped to the parsed file
struct FileImportTable {
mut:
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module_name string
file_path string
imports map[string]string
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}
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enum AccessMod {
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private // private immutable
private_mut // private mutable
public // public immutable (readonly)
public_mut // public, but mutable only in this module
public_mut_mut // public and mutable both inside and outside (not recommended to use, that's why it's so verbose)
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}
struct Type {
mut:
mod string
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name string
fields []Var
methods []Fn
parent string
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func Fn // For cat == FN (type myfn fn())
is_c bool // C.FI.le
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is_interface bool
is_enum bool
enum_vals []string
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gen_types []string
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// This field is used for types that are not defined yet but are known to exist.
// It allows having things like `fn (f Foo) bar()` before `Foo` is defined.
// This information is needed in the first pass.
is_placeholder bool
}
// For debugging types
fn (t Type) str() string {
mut s := 'type "$t.name" {'
if t.fields.len > 0 {
// s += '\n $t.fields.len fields:\n'
for field in t.fields {
s += '\n $field.name $field.typ'
}
s += '\n'
}
if t.methods.len > 0 {
// s += '\n $t.methods.len methods:\n'
for method in t.methods {
s += '\n ${method.str()}'
}
s += '\n'
}
s += '}\n'
return s
}
const (
CReserved = [
'exit',
'unix',
'print',
// 'ok',
'error',
'malloc',
'calloc',
'char',
'free',
'panic',
'register'
]
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)
// This is used in generated C code
fn (f Fn) str() string {
t := Table{}
str_args := f.str_args(t)
return '$f.name($str_args) $f.typ'
}
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fn (t &Table) debug_fns() string {
mut s := strings.new_builder(1000)
for _, f in t.fns {
s.writeln(f.name)
}
return s.str()
}
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// fn (types array_Type) print_to_file(f string) {
// }
const (
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NUMBER_TYPES = ['number', 'int', 'i8', 'u8', 'i16', 'u16', 'i32', 'u32', 'byte', 'i64', 'u64', 'f32', 'f64']
FLOAT_TYPES = ['f32', 'f64']
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)
fn is_number_type(typ string) bool {
return NUMBER_TYPES.contains(typ)
}
fn is_float_type(typ string) bool {
return FLOAT_TYPES.contains(typ)
}
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fn is_primitive_type(typ string) bool {
return is_number_type(typ) || typ == 'string'
}
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fn new_table(obfuscate bool) *Table {
mut t := &Table {
obf_ids: map[string]int{}
fns: map[string]Fn{}
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//generic_fns: map[string]GenTable{}
generic_fns: []GenTable
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obfuscate: obfuscate
}
t.register_type('int')
t.register_type('size_t')
t.register_type_with_parent('i8', 'int')
t.register_type_with_parent('u8', 'int')
t.register_type_with_parent('i16', 'int')
t.register_type_with_parent('u16', 'int')
t.register_type_with_parent('i32', 'int')
t.register_type_with_parent('u32', 'int')
t.register_type_with_parent('byte', 'int')
t.register_type_with_parent('i64', 'int')
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t.register_type_with_parent('u64', 'int')
t.register_type('byteptr')
t.register_type('intptr')
t.register_type('f32')
t.register_type('f64')
t.register_type('rune')
t.register_type('bool')
t.register_type('void')
t.register_type('voidptr')
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t.register_type('T')
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t.register_type('va_list')
t.register_const('stdin', 'int', 'main', false)
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t.register_const('stdout', 'int', 'main', false)
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t.register_const('stderr', 'int', 'main', false)
t.register_const('errno', 'int', 'main', false)
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t.register_type_with_parent('map_string', 'map')
t.register_type_with_parent('map_int', 'map')
return t
}
// If `name` is a reserved C keyword, returns `v_name` instead.
fn (t mut Table) var_cgen_name(name string) string {
if CReserved.contains(name) {
return 'v_$name'
}
else {
return name
}
}
fn (t mut Table) register_package(pkg string) {
if t.packages.contains(pkg) {
return
}
t.packages << pkg
}
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fn (p mut Parser) register_import() {
if p.tok != .name {
p.error('bad import format')
}
mut pkg := p.lit.trim_space()
mut mod_alias := pkg
// submodule support
mut depth := 1
p.next()
for p.tok == .dot {
p.check(.dot)
submodule := p.check_name()
mod_alias = submodule
pkg += '.' + submodule
depth++
if depth > MaxModuleDepth {
p.error('module depth of $MaxModuleDepth exceeded: $pkg')
}
}
// aliasing (import encoding.base64 as b64)
if p.tok == .key_as && p.peek() == .name {
p.check(.key_as)
mod_alias = p.check_name()
}
// add import to file scope import table
p.import_table.register_alias(mod_alias, pkg)
// Make sure there are no duplicate imports
if p.table.imports.contains(pkg) {
return
}
p.log('adding import $pkg')
p.table.imports << pkg
p.table.register_package(pkg)
p.fgenln(' ' + pkg)
}
fn (p mut Parser) register_array(typ string) {
if typ.contains('*') {
println('bad arr $typ')
return
}
if !p.table.known_type(typ) {
p.register_type_with_parent(typ, 'array')
p.cgen.typedefs << 'typedef array $typ;'
}
}
fn (p mut Parser) register_map(typ string) {
if typ.contains('*') {
println('bad map $typ')
return
}
if !p.table.known_type(typ) {
p.register_type_with_parent(typ, 'map')
p.cgen.typedefs << 'typedef map $typ;'
}
}
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fn (table &Table) known_pkg(pkg string) bool {
return pkg in table.packages
}
fn (t mut Table) register_const(name, typ, mod string, is_imported bool) {
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t.consts << Var {
name: name
typ: typ
is_const: true
is_import_const: is_imported
mod: mod
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}
}
// Only for translated code
fn (p mut Parser) register_global(name, typ string) {
p.table.consts << Var {
name: name
typ: typ
is_const: true
is_global: true
mod: p.mod
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}
}
fn (t mut Table) register_fn(new_fn Fn) {
t.fns[new_fn.name] = new_fn
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}
fn (table &Table) known_type(typ string) bool {
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// 'byte*' => look up 'byte', but don't mess up fns
if typ.ends_with('*') && !typ.contains(' ') {
typ = typ.left(typ.len - 1)
}
for t in table.types {
if t.name == typ && !t.is_placeholder {
return true
}
}
return false
}
fn (t &Table) find_fn(name string) Fn {
f := t.fns[name]
if !isnil(f.name.str) {
return f
}
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return Fn{}
}
fn (t &Table) known_fn(name string) bool {
f := t.find_fn(name)
return f.name != ''
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}
fn (t &Table) known_const(name string) bool {
v := t.find_const(name)
// TODO use optional
return v.name.len > 0
}
fn (t mut Table) register_type(typ string) {
if typ.len == 0 {
return
}
for typ2 in t.types {
if typ2.name == typ {
return
}
}
// if t.types.filter( _.name == typ.name).len > 0 {
// return
// }
t.types << Type {
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name: typ
}
}
fn (p mut Parser) register_type_with_parent(strtyp, parent string) {
typ := Type {
name: strtyp
parent: parent
mod: p.mod
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}
p.table.register_type2(typ)
}
fn (t mut Table) register_type_with_parent(typ, parent string) {
if typ.len == 0 {
return
}
// if t.types.filter(_.name == typ) > 0
for typ2 in t.types {
if typ2.name == typ {
return
}
}
/*
mut pkg := ''
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if parent == 'array' {
pkg = 'builtin'
}
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*/
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t.types << Type {
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name: typ
parent: parent
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//mod: mod
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}
}
fn (t mut Table) register_type2(typ Type) {
if typ.name.len == 0 {
return
}
for typ2 in t.types {
if typ2.name == typ.name {
return
}
}
t.types << typ
}
fn (t mut Type) add_field(name, typ string, is_mut bool, attr string, access_mod AccessMod) {
// if t.name == 'Parser' {
// println('adding field $name')
// }
v := Var {
name: name
typ: typ
is_mut: is_mut
attr: attr
access_mod: access_mod
}
t.fields << v
}
fn (t &Type) has_field(name string) bool {
field := t.find_field(name)
return (field.name != '')
}
fn (t &Type) has_enum_val(name string) bool {
return name in t.enum_vals
}
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fn (t &Type) find_field(name string) Var {
for field in t.fields {
if field.name == name {
return field
}
}
return Var{}
}
fn (table &Table) type_has_field(typ &Type, name string) bool {
field := table.find_field(typ, name)
return (field.name != '')
}
fn (table &Table) find_field(typ &Type, name string) Var {
field := typ.find_field(name)
if field.name.len == 0 && typ.parent.len > 0 {
parent := table.find_type(typ.parent)
return parent.find_field(name)
}
return field
}
fn (t mut Type) add_method(f Fn) {
// if t.name.contains('Parser') {
// println('!!!add_method() $f.name to $t.name len=$t.methods.len cap=$t.methods.cap')
// }
t.methods << f
// println('end add_method()')
}
fn (t &Type) has_method(name string) bool {
method := t.find_method(name)
return (method.name != '')
}
fn (table &Table) type_has_method(typ &Type, name string) bool {
method := table.find_method(typ, name)
return (method.name != '')
}
// TODO use `?Fn`
fn (table &Table) find_method(typ &Type, name string) Fn {
// println('TYPE HAS METHOD $name')
method := typ.find_method(name)
if method.name.len == 0 && typ.parent.len > 0 {
parent := table.find_type(typ.parent)
return parent.find_method(name)
// println('parent = $parent.name $res')
// return res
}
return method
}
fn (t &Type) find_method(name string) Fn {
// println('$t.name find_method($name) methods.len=$t.methods.len')
for method in t.methods {
// println('method=$method.name')
if method.name == name {
return method
}
}
return Fn{}
}
/*
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fn (t mut Type) add_gen_type(type_name string) {
// println('add_gen_type($s)')
if t.gen_types.contains(type_name) {
return
}
t.gen_types << type_name
}
*/
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fn (p &Parser) find_type(name string) *Type {
typ := p.table.find_type(name)
if typ.name.len == 0 {
return p.table.find_type(p.prepend_pkg(name))
}
return typ
}
fn (t &Table) find_type(name string) *Type {
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if name.ends_with('*') && !name.contains(' ') {
name = name.left(name.len - 1)
}
// TODO PERF use map
for i, typ in t.types {
if typ.name == name {
return &t.types[i]
}
}
return &Type{}
}
fn (p mut Parser) _check_types(got, expected string, throw bool) bool {
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p.log('check types got="$got" exp="$expected" ')
if p.pref.translated {
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return true
}
// Allow ints to be used as floats
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if got == 'int' && expected == 'f32' {
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return true
}
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if got == 'int' && expected == 'f64' {
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return true
}
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if got == 'f64' && expected == 'f32' {
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return true
}
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if got == 'f32' && expected == 'f64' {
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return true
}
// Allow ints to be used as longs
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if got=='int' && expected=='i64' {
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return true
}
if got == 'void*' && expected.starts_with('fn ') {
return true
}
if got.starts_with('[') && expected == 'byte*' {
return true
}
// Todo void* allows everything right now
if got=='void*' || expected=='void*' {
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// if !p.builtin_pkg {
if p.pref.is_play {
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return false
}
return true
}
// TODO only allow numeric consts to be assigned to bytes, and
// throw an error if they are bigger than 255
if got=='int' && expected=='byte' {
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return true
}
if got=='byteptr' && expected=='byte*' {
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return true
}
if got=='byte*' && expected=='byteptr' {
return true
}
if got=='int' && expected=='byte*' {
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return true
}
// byteptr += int
if got=='int' && expected=='byteptr' {
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return true
}
if got == 'Option' && expected.starts_with('Option_') {
return true
}
// lines := new_array
if got == 'array' && expected.starts_with('array_') {
return true
}
// Expected type "Option_os__File", got "os__File"
if expected.starts_with('Option_') && expected.ends_with(got) {
return true
}
// NsColor* return 0
if !p.pref.is_play {
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if expected.ends_with('*') && got == 'int' {
return true
}
// if got == 'T' || got.contains('<T>') {
// return true
// }
// if expected == 'T' || expected.contains('<T>') {
// return true
// }
// Allow pointer arithmetic
if expected=='void*' && got=='int' {
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return true
}
}
expected = expected.replace('*', '')
got = got.replace('*', '')
if got != expected {
// Interface check
if expected.ends_with('er') {
if p.satisfies_interface(expected, got, throw) {
return true
}
}
if !throw {
return false
}
else {
p.error('expected type `$expected`, but got `$got`')
}
}
return true
}
// throw by default
fn (p mut Parser) check_types(got, expected string) bool {
return p._check_types(got, expected, true)
}
fn (p mut Parser) check_types_no_throw(got, expected string) bool {
return p._check_types(got, expected, false)
}
fn (p mut Parser) satisfies_interface(interface_name, _typ string, throw bool) bool {
int_typ := p.table.find_type(interface_name)
typ := p.table.find_type(_typ)
for method in int_typ.methods {
if !typ.has_method(method.name) {
// if throw {
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p.error('Type "$_typ" doesn\'t satisfy interface "$interface_name" (method "$method.name" is not implemented)')
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// }
return false
}
}
return true
}
fn type_default(typ string) string {
if typ.starts_with('array_') {
typ = typ.right(6)
return 'new_array(0, 1, sizeof($typ))'
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}
// Always set pointers to 0
if typ.ends_with('*') {
return '0'
}
// User struct defined in another module.
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if typ.contains('__') {
return 'STRUCT_DEFAULT_VALUE'
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}
// Default values for other types are not needed because of mandatory initialization
switch typ {
case 'bool': return '0'
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case 'string': return 'tos("", 0)'
case 'i8': return '0'
case 'i16': return '0'
case 'i32': return '0'
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case 'i64': return '0'
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case 'u8': return '0'
case 'u16': return '0'
case 'u32': return '0'
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case 'u64': return '0'
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case 'byte': return '0'
case 'int': return '0'
case 'rune': return '0'
case 'f32': return '0.0'
case 'f64': return '0.0'
case 'byteptr': return '0'
case 'voidptr': return '0'
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}
return 'STRUCT_DEFAULT_VALUE'
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}
// TODO PERF O(n)
fn (t &Table) is_interface(name string) bool {
for typ in t.types {
if typ.is_interface && typ.name == name {
return true
}
}
return false
}
// Do we have fn main()?
fn (t &Table) main_exists() bool {
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for _, f in t.fns {
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if f.name == 'main' {
return true
}
}
return false
}
// TODO use `?Var`
fn (t &Table) find_const(name string) Var {
for c in t.consts {
if c.name == name {
return c
}
}
return Var{}
}
fn (table mut Table) cgen_name(f &Fn) string {
mut name := f.name
if f.is_method {
name = '${f.receiver_typ}_$f.name'
name = name.replace(' ', '')
name = name.replace('*', '')
name = name.replace('+', 'plus')
name = name.replace('-', 'minus')
}
// Avoid name conflicts (with things like abs(), print() etc).
// Generate b_abs(), b_print()
// TODO duplicate functionality
if f.pkg == 'builtin' && CReserved.contains(f.name) {
return 'v_$name'
}
// Obfuscate but skip certain names
// TODO ugly, fix
if table.obfuscate && f.name != 'main' && f.name != 'WinMain' && f.pkg != 'builtin' && !f.is_c &&
f.pkg != 'darwin' && f.pkg != 'os' && !f.name.contains('window_proc') && f.name != 'gg__vec2' &&
f.name != 'build_token_str' && f.name != 'build_keys' && f.pkg != 'json' &&
!name.ends_with('_str') && !name.contains('contains') {
mut idx := table.obf_ids[name]
// No such function yet, register it
if idx == 0 {
table.fn_cnt++
table.obf_ids[name] = table.fn_cnt
idx = table.fn_cnt
}
old := name
name = 'f_$idx'
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println('$old ==> $name')
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}
return name
}
// ('s', 'string') => 'string s'
// ('nums', '[20]byte') => 'byte nums[20]'
// ('myfn', 'fn(int) string') => 'string (*myfn)(int)'
fn (table &Table) cgen_name_type_pair(name, typ string) string {
// Special case for [10]int
if typ.len > 0 && typ[0] == `[` {
tmp := typ.all_after(']')
size := typ.all_before(']')
return '$tmp $name $size ]'
}
// fn()
else if typ.starts_with('fn (') {
T := table.find_type(typ)
if T.name == '' {
println('this should never happen')
exit(1)
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}
str_args := T.func.str_args(table)
return '$T.func.typ (*$name)( $str_args /*FFF*/ )'
}
// TODO tm hack, do this for all C struct args
else if typ == 'tm' {
return 'struct /*TM*/ tm $name'
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}
return '$typ $name'
}
fn is_valid_int_const(val, typ string) bool {
x := val.int()
switch typ {
case 'byte', 'u8': return 0 <= x && x <= math.MaxU8
case 'u16': return 0 <= x && x <= math.MaxU16
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//case 'u32': return 0 <= x && x <= math.MaxU32
//case 'u64': return 0 <= x && x <= math.MaxU64
//////////////
case 'i8': return math.MinI8 <= x && x <= math.MaxI8
case 'i16': return math.MinI16 <= x && x <= math.MaxI16
case 'int', 'i32': return math.MinI32 <= x && x <= math.MaxI32
//case 'i64':
//x64 := val.i64()
//return i64(-(1<<63)) <= x64 && x64 <= i64((1<<63)-1)
}
return true
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}
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fn (t mut Table) register_generic_fn(fn_name string) {
t.generic_fns << GenTable{fn_name, []string}
}
fn (t mut Table) fn_gen_types(fn_name string) []string {
for _, f in t.generic_fns {
if f.fn_name == fn_name {
return f.types
}
}
}
// `foo<Bar>()`
// fn_name == 'foo'
// typ == 'Bar'
fn (t mut Table) register_generic_fn_type(fn_name, typ string) {
for i, f in t.generic_fns {
if f.fn_name == fn_name {
t.generic_fns[i].types << typ
return
}
}
}
fn (p mut Parser) typ_to_fmt(typ string, level int) string {
t := p.table.find_type(typ)
if t.is_enum {
return '%d'
}
switch typ {
case 'string': return '%.*s'
case 'ustring': return '%.*s'
case 'byte', 'int', 'char', 'byte', 'bool', 'u32', 'i32', 'i16', 'u16', 'i8', 'u8': return '%d'
case 'f64', 'f32': return '%f'
case 'i64', 'u64': return '%lld'
case 'byte*', 'byteptr': return '%s'
// case 'array_string': return '%s'
// case 'array_int': return '%s'
case 'void': p.error('cannot interpolate this value')
default:
if typ.ends_with('*') {
return '%p'
}
}
if t.parent != '' && level == 0 {
return p.typ_to_fmt(t.parent, level+1)
}
return ''
}
fn is_compile_time_const(s string) bool {
s = s.trim_space()
if s == '' {
return false
}
if s.contains('\'') {
return true
}
for c in s {
if ! ((c >= `0` && c <= `9`) || c == `.`) {
return false
}
}
return true
}
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// Once we have a module format we can read from module file instead
// this is not optimal
fn (table &Table) qualify_module(mod string, file_path string) string {
for m in table.imports {
if m.contains('.') && m.contains(mod) {
m_parts := m.split('.')
m_path := m_parts.join('/')
if mod == m_parts[m_parts.len-1] && file_path.contains(m_path) {
return m
}
}
}
return mod
}
fn new_file_import_table(file_path string) *FileImportTable {
return &FileImportTable{
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file_path: file_path
imports: map[string]string{}
}
}
fn (fit &FileImportTable) known_import(mod string) bool {
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return mod in fit.imports || fit.is_aliased(mod)
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}
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fn (fit mut FileImportTable) register_import(mod string) {
fit.register_alias(mod, mod)
}
fn (fit mut FileImportTable) register_alias(alias string, mod string) {
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if alias in fit.imports {
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panic('cannot import $mod as $alias: import name $alias already in use in "${fit.file_path}".')
return
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}
if mod.contains('.internal.') {
mod_parts := mod.split('.')
mut internal_mod_parts := []string
for part in mod_parts {
if part == 'internal' { break }
internal_mod_parts << part
}
internal_parent := internal_mod_parts.join('.')
if !fit.module_name.starts_with(internal_parent) {
panic('module $mod can only be imported internally by libs.')
}
}
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fit.imports[alias] = mod
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}
fn (fit &FileImportTable) known_alias(alias string) bool {
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return alias in fit.imports
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}
fn (fit &FileImportTable) is_aliased(mod string) bool {
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for _, val in fit.imports {
if val == mod {
return true
}
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}
return false
}
fn (fit &FileImportTable) resolve_alias(alias string) string {
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return fit.imports[alias]
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}