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v/compiler/parser.v
drswinghead 7ca00c8f5e Fix decl c struct follow a v struct 
struct C.CURL

struct Curl {
    h *C.CURL
}
2019-06-27 02:25:39 +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 rand
struct Var {
mut:
typ string
name string
is_arg bool
is_const bool
is_import_const bool // TODO remove import consts entirely
args []Var // function args
attr string // [json] etc
is_mut bool
ptr bool
ref bool
parent_fn string // Variables can only be defined in functions
pkg string // module where this var is stored TODO rename to `mod`
line_nr int
access_mod AccessMod
is_global bool // __global (translated from C only)
is_used bool
scope_level int
}
struct Parser {
file_path string // "/home/user/hello.v"
file_name string // "hello.v"
mut:
scanner *Scanner
// tokens []Token // TODO cache all tokens, right now they have to be scanned twice
token_idx int
tok Token
prev_tok Token
prev_tok2 Token // TODO remove these once the tokens are cached
lit string
cgen *CGen
table *Table
run Pass // TODO rename `run` to `pass`
os Os
pkg string
inside_const bool
expr_var Var
assigned_type string
tmp_cnt int
// TODO all these options are copy-pasted from the V struct. Create a Settings struct instead?
is_test bool
is_script bool
is_live bool
is_so bool
is_prof bool
translated bool
is_prod bool
is_verbose bool
obfuscate bool
is_play bool
is_repl bool
builtin_pkg bool
build_mode BuildMode
vh_lines []string
inside_if_expr bool
is_struct_init bool
if_expr_cnt int
for_expr_cnt int // to detect whether `continue` can be used
ptr_cast bool
calling_c bool
cur_fn *Fn
returns bool
vroot string
}
const (
EmptyFn = &Fn { }
)
fn (c mut V) new_parser(path string, run Pass) Parser {
c.log('new_parser("$path")')
c.cgen.run = run
mut p := Parser {
file_path: path
file_name: path.all_after('/')
scanner: new_scanner(path)
table: c.table
cur_fn: EmptyFn
cgen: c.cgen
is_test: c.is_test
is_script: (c.is_script && path == c.dir)
is_so: c.is_so
os: c.os
is_prof: c.is_prof
is_prod: c.is_prod
is_play: c.is_play
translated: c.translated
obfuscate: c.obfuscate
is_verbose: c.is_verbose
build_mode: c.build_mode
is_repl: c.is_repl
run: run
vroot: c.vroot
}
p.next()
// p.scanner.debug_tokens()
return p
}
fn (p mut Parser) next() {
p.prev_tok2 = p.prev_tok
p.prev_tok = p.tok
res := p.scanner.scan()
p.tok = res.tok
p.lit = res.lit
}
fn (p &Parser) log(s string) {
if !p.is_verbose {
return
}
println(s)
}
fn (p mut Parser) parse() {
p.log('\nparse() run=$p.run file=$p.file_name tok=${p.strtok()}')// , "script_file=", script_file)
// `module main` is not required if it's a single file program
if p.is_script || p.is_test {
p.pkg = 'main'
// User may still specify `module main`
if p.tok == PACKAGE {
p.next()
p.fgen('module ')
p.pkg = p.check_name()
}
}
else {
p.check(PACKAGE)
p.pkg = p.check_name()
}
p.fgenln('\n')
p.builtin_pkg = p.pkg == 'builtin'
// Import pass - the first and the smallest pass that only analyzes imports
p.table.register_package(p.pkg)
if p.run == RUN_IMPORTS {
for p.tok == IMPORT && p.peek() != CONST {
p.import_statement()
}
return
}
// Go through every top level token or throw a compilation error if a non-top level token is met
for {
switch p.tok {
case IMPORT:
if p.peek() == CONST {
p.const_decl()
}
else {
// TODO remove imported consts from the language
p.import_statement()
}
case ENUM:
p.next()
if p.tok == NAME {
p.fgen('enum ')
name := p.check_name()
p.fgen(' ')
p.enum_decl(name)
}
// enum without a name, only allowed in code, translated from C
// it's a very bad practice in C as well, but is used unfortunately (for example, by DOOM)
// such fields are basically int consts
else if p.translated {
p.enum_decl('int')
}
else {
p.check(NAME)
}
case PUB:
if p.peek() == FUNC {
p.fn_decl()
} else if p.peek() == STRUCT {
p.error('structs can\'t be declared public *yet*')
// TODO public structs
} else {
p.error('wrong pub keyword usage')
}
case FUNC:
p.fn_decl()
case TIP:
p.type_decl()
case STRUCT, INTERFACE, UNION, LSBR:// `[` can only mean an [attribute] before the struct definition
p.struct_decl()
case CONST:
p.const_decl()
case HASH:
// insert C code, TODO this is going to be removed ASAP
// some libraries (like UI) still have lots of C code
// # puts("hello");
p.chash()
case DOLLAR:
// $if, $else
p.comp_time()
case GLOBAL:
if !p.translated {
p.error('__global is only allowed in translated code')
}
p.next()
name := p.check_name()
typ := p.get_type()
p.register_global(name, typ)
// p.genln(p.table.cgen_name_type_pair(name, typ))
mut g := p.table.cgen_name_type_pair(name, typ)
if p.tok == ASSIGN {
p.next()
// p.gen(' = ')
g += ' = '
p.cgen.start_tmp()
p.bool_expression()
// g += '<<< ' + p.cgen.end_tmp() + '>>>'
g += p.cgen.end_tmp()
}
// p.genln('; // global')
g += ('; // global')
p.cgen.consts << g
case EOF:
p.log('end of parse()')
if true && !p.first_run() && p.fileis('test') {
out := os.create('/var/tmp/fmt.v')
out.appendln(p.scanner.fmt_out.str())
out.close()
}
return
default:
// no `fn main`, add this "global" statement to cgen.fn_main
if p.is_script && !p.is_test {
if p.cur_fn.scope_level == 0 {
// p.cur_fn.scope_level++
}
// println('is script')
p.print_tok()
start := p.cgen.lines.len
p.statement(true)
end := p.cgen.lines.len
lines := p.cgen.lines.slice(start, end)
// p.cgen.fn_main << p.cgen.prev_line
// println('fn line:')
// println(p.cgen.fn_main + lines.join('\n'))
p.cgen.fn_main = p.cgen.fn_main + lines.join('\n')
p.cgen.cur_line = ''
for i := start; i < end; i++ {
// p.cgen.lines[p.cgen.lines.len - 1] = ''
p.cgen.lines[i] = ''
}
// exit('')
}
else {
p.error('unexpected token `${p.strtok()}`')
}
}
}
}
fn (p mut Parser) import_statement() {
p.check(IMPORT)
// `import ()`
if p.tok == LPAR {
p.check(LPAR)
for p.tok != RPAR && p.tok != EOF {
pkg := p.lit.trim_space()
p.next()
if p.table.imports.contains(pkg) {
continue
}
p.table.imports << pkg
p.table.register_package(pkg)
}
p.check(RPAR)
return
}
// `import foo`
if p.tok != NAME {
p.error('bad import format')
}
pkg := p.lit.trim_space()
p.next()
p.fgenln(' ' + pkg)
// Make sure there are no duplicate imports
if p.table.imports.contains(pkg) {
return
}
p.log('adding import $pkg')
p.table.imports << pkg
p.table.register_package(pkg)
}
fn (p mut Parser) const_decl() {
is_import := p.tok == IMPORT
p.inside_const = true
if is_import {
p.next()
}
p.check(CONST)
p.fspace()
p.check(LPAR)
p.fgenln('')
p.scanner.fmt_indent++
for p.tok == NAME {
// `Age = 20`
mut name := p.check_name()
if p.is_play && ! (name[0] >= `A` && name[0] <= `Z`) {
p.error('const name must be capitalized')
}
// Imported consts (like GL_TRIANGLES) dont need pkg prepended (gl__GL_TRIANGLES)
if !is_import {
name = p.prepend_pkg(name)
}
mut typ := 'int'
if !is_import {
p.check_space(ASSIGN)
typ = p.expression()
}
if p.first_run() && !is_import && p.table.known_const(name) {
p.error('redefinition of `$name`')
}
p.table.register_const(name, typ, p.pkg, is_import)
if p.run == RUN_MAIN && !is_import {
// TODO hack
// cur_line has const's value right now. if it's just a number, then optimize generation:
// output a #define so that we don't pollute the binary with unnecessary global vars
if is_compile_time_const(p.cgen.cur_line) {
p.cgen.consts << '#define $name $p.cgen.cur_line'
p.cgen.cur_line = ''
p.fgenln('')
continue
}
if typ.starts_with('[') {
p.cgen.consts << p.table.cgen_name_type_pair(name, typ) +
' = $p.cgen.cur_line;'
}
else {
p.cgen.consts << p.table.cgen_name_type_pair(name, typ) + ';'
p.cgen.consts_init << '$name = $p.cgen.cur_line;'
}
p.cgen.cur_line = ''
}
p.fgenln('')
}
p.scanner.fmt_indent--
p.check(RPAR)
p.fgenln('\n')
p.inside_const = false
}
// `type myint int`
// `type onclickfn fn(voidptr) int`
fn (p mut Parser) type_decl() {
p.check(TIP)
name := p.check_name()
parent := p.get_type()
nt_pair := p.table.cgen_name_type_pair(name, parent)
// TODO dirty C typedef hacks for DOOM
// Unknown type probably means it's a struct, and it's used before the struct is defined,
// so specify "struct"
_struct := if !parent.contains('[') && !parent.starts_with('fn ') && !p.table.known_type(parent){'struct'} else { ''}
p.gen_typedef('typedef $_struct $nt_pair; // type alias name="$name" parent="$parent"')
p.table.register_type_with_parent(name, parent)
}
// also unions and interfaces
fn (p mut Parser) struct_decl() {
// Attribute before type?
mut objc_parent := ''
mut is_objc := false// V can generate Objective C for integration with Cocoa
// [attr]
if p.tok == LSBR {
p.check(LSBR)
// `[interface:ParentInterface]`
is_objc = p.tok == INTERFACE
p.next()
if is_objc {
p.check(COLON)
objc_parent = p.check_name()
}
p.check(RSBR)
}
is_interface := p.tok == INTERFACE
is_union := p.tok == UNION
is_struct := p.tok == STRUCT
p.fgen(p.tok.str() + ' ')
// Get type name
p.next()
mut name := p.check_name()
if name.contains('_') && !p.translated {
p.error('type names cannot contain `_`')
}
if is_interface && !name.ends_with('er') {
p.error('interface names temporarily have to end with `er` (e.g. `Speaker`, `Reader`)')
}
is_c := name == 'C' && p.tok == DOT
if is_c {
p.check(DOT)
name = p.check_name()
}
// Specify full type name
if !is_c && !p.builtin_pkg && p.pkg != 'main' {
name = p.prepend_pkg(name)
}
if p.run == RUN_DECLS && p.table.known_type(name) {
p.error('`$name` redeclared')
}
// Generate type definitions
if is_objc {
p.gen_type('@interface $name : $objc_parent { @public')
}
else {
// type alias is generated later
if !is_c {
kind := if is_union{'union'} else { 'struct'}
p.gen_typedef('typedef $kind $name $name;')
p.gen_type('$kind $name {')
}
}
// V used to have 'type Foo struct', many Go users might use this syntax
if !is_c && p.tok == STRUCT {
p.error('use `struct $name {` instead of `type $name struct {`')
}
// Register the type
mut typ := p.table.find_type(name)
mut is_ph := false
if typ.is_placeholder {
is_ph = true
typ.name = name
typ.pkg = p.pkg
typ.is_c = is_c
typ.is_placeholder = false
}
else {
typ = &Type {
name: name
pkg: p.pkg
is_c: is_c
is_interface: is_interface
}
}
// Struct `C.Foo` declaration, no body
// println('EEEE $is_c $is_struct')
if is_c && is_struct && p.tok != LCBR {
// println('skipping struct header $name')
p.table.register_type2(typ)
return
}
p.fgen(' ')
p.check(LCBR)
// Struct fields
mut is_pub := false
mut is_mut := false
mut names := []string// to avoid dup names TODO alloc perf
// mut is_mut_mut := false
for p.tok != RCBR {
if p.tok == PUB {
if is_pub {
p.error('structs can only have one `pub:`, all public fields have to be grouped')
}
is_pub = true
p.scanner.fmt_indent--
p.check(PUB)
if p.tok != MUT {
p.check(COLON)
}
p.scanner.fmt_indent++
p.fgenln('')
}
if p.tok == MUT {
if is_mut {
p.error('structs can only have one `mut:`, all private mutable fields have to be grouped')
}
is_mut = true
p.scanner.fmt_indent--
p.check(MUT)
if p.tok != MUT {
p.check(COLON)
}
p.scanner.fmt_indent++
p.fgenln('')
}
// if is_pub {
// }
// (mut) user *User
// if p.tok == PLUS {
// p.next()
// }
// Check dups
field_name := p.check_name()
if field_name in names {
p.error('duplicate field `$field_name`')
}
names << field_name
// We are in an interface?
// `run() string` => run is a method, not a struct field
if is_interface {
mut interface_method := &Fn {
name: field_name
is_interface: true
is_method: true
receiver_typ: name
}
println('is interface. field=$field_name run=$p.run')
p.fn_args(mut interface_method)
p.fspace()
interface_method.typ = p.get_type()// method return type
typ.add_method(interface_method)
p.fgenln('')
continue
}
// `pub` access mod
access_mod := if is_pub{PUBLIC} else { PRIVATE}
p.fgen(' ')
field_type := p.get_type()
is_atomic := p.tok == ATOMIC
if is_atomic {
p.next()
p.gen_type('_Atomic ')
}
if !is_c {
p.gen_type(p.table.cgen_name_type_pair(field_name, field_type) + ';')
}
// [ATTR]
mut attr := ''
if p.tok == LSBR {
p.next()
attr = p.check_name()
p.check(RSBR)
}
typ.add_field(field_name, field_type, is_mut, attr, access_mod)
p.fgenln('')
}
if !is_ph && p.first_run() {
p.table.register_type2(typ)
}
p.check(RCBR)
if !is_c {
p.gen_type('}; ')
}
if is_objc {
p.gen_type('@end')
}
p.fgenln('\n')
}
fn (p mut Parser) enum_decl(_enum_name string) {
mut enum_name := _enum_name
// Specify full type name
if !p.builtin_pkg && p.pkg != 'main' {
enum_name = p.prepend_pkg(enum_name)
}
p.table.register_type2(&Type {
name: enum_name
pkg: p.pkg
parent: 'int'
is_enum: true
})
// Skip empty enums
if enum_name != 'int' {
p.cgen.typedefs << 'typedef int $enum_name ;\n'
}
p.check(LCBR)
mut val := 0
for p.tok == NAME {
field := p.check_name()
// name := '${p.pkg}__${enum_name}_$field'
// name := '${enum_name}_$field'
name := '$field'
p.fgenln('')
if p.run == RUN_MAIN {
p.cgen.consts << '#define $name $val \n'
}
if p.tok == COMMA {
p.next()
}
p.table.register_const(name, enum_name, p.pkg, false)
val++
}
p.check(RCBR)
p.fgenln('\n')
}
// check_name checks for a name token and returns its literal
fn (p mut Parser) check_name() string {
name := p.lit
p.check(NAME)
return name
}
fn (p mut Parser) check_string() string {
s := p.lit
p.check(STRING)
return s
}
fn (p &Parser) strtok() string {
if p.tok == NAME {
return p.lit
}
if p.tok == STRING {
return '"$p.lit"'
}
res := p.tok.str()
if res == '' {
n := int(p.tok)
return n.str()
}
return res
}
// same as check(), but addes a space to the formatter output
// TODO bad name
fn (p mut Parser) check_space(expected Token) {
p.fspace()
p.check(expected)
p.fspace()
}
fn (p mut Parser) check(expected Token) {
if p.tok != expected {
println('check()')
mut s := 'expected `${expected.str()}` but got `${p.strtok()}`'
p.next()
println('next token = `${p.strtok()}`')
print_backtrace()
p.error(s)
}
if expected == RCBR {
p.scanner.fmt_indent--
}
p.fgen(p.strtok())
// vfmt: increase indentation on `{` unless it's `{}`
if expected == LCBR && p.scanner.text[p.scanner.pos + 1] != `}` {
p.fgenln('')
p.scanner.fmt_indent++
}
p.next()
}
fn (p mut Parser) error(s string) {
// Dump all vars and types for debugging
if false {
file_types := os.create('$TmpPath/types')
file_vars := os.create('$TmpPath/vars')
// ////debug("ALL T", q.J(p.table.types))
// os.write_to_file('/var/tmp/lang.types', '')//pes(p.table.types))
// //debug("ALL V", q.J(p.table.vars))
// os.write_to_file('/var/tmp/lang.vars', q.J(p.table.vars))
file_types.close()
file_vars.close()
}
if !p.is_repl {
println('pass=$p.run fn=`$p.cur_fn.name`')
}
p.cgen.save()
// V git pull hint
cur_path := os.getwd()
if p.file_path.contains('v/compiler') || cur_path.contains('v/compiler') {
println('\n=========================')
println('It looks like you are building V. It is being frequently updated every day.')
println('If you didn\'t modify the compiler\'s code, most likely there was a change that ')
println('lead to this error.')
println('\nTry to run `git pull && make clean && make`, that will most likely fix it.')
println('\nIf this doesn\'t help, re-install V from source or download a precompiled' + ' binary from\nhttps://vlang.io.')
println('=========================\n')
}
// p.scanner.debug_tokens()
// Print `[]int` instead of `array_int` in errors
p.scanner.error(s.replace('array_', '[]').replace('__', '.'))
}
fn (p &Parser) first_run() bool {
return p.run == RUN_DECLS
}
// TODO return Type instead of string?
fn (p mut Parser) get_type() string {
debug := p.fileis('fn_test') && false
mut mul := false
mut nr_muls := 0
mut typ = ''
// fn type
if p.tok == FUNC {
if debug {
println('\nget_type() GOT FN TYP line=$p.scanner.line_nr')
}
mut f := Fn{name: '_', pkg: p.pkg}
p.next()
line_nr := p.scanner.line_nr
p.fn_args(mut f)
// Same line, it's a return type
if p.scanner.line_nr == line_nr {
if debug {
println('same line getting type')
}
f.typ = p.get_type()
// println('fn return typ=$f.typ')
}
else {
f.typ = 'void'
}
// Register anon fn type
fn_typ := Type {
name: f.typ_str()// 'fn (int, int) string'
pkg: p.pkg
func: f
}
p.table.register_type2(fn_typ)
return f.typ_str()
}
// arrays ([]int)
mut is_arr := false
mut is_arr2 := false// [][]int TODO remove this and allow unlimited levels of arrays
is_question := p.tok == QUESTION
if is_question {
p.check(QUESTION)
}
if p.tok == LSBR {
p.check(LSBR)
// [10]int
if p.tok == INT {
typ = '[$p.lit]'
p.next()
}
else {
is_arr = true
}
p.check(RSBR)
// [10][3]int
if p.tok == LSBR {
p.next()
if p.tok == INT {
typ += '[$p.lit]'
p.check(INT)
}
else {
is_arr2 = true
}
p.check(RSBR)
}
}
for p.tok == MUL {
mul = true
nr_muls++
p.next()
}
if p.tok == AMP {
mul = true
nr_muls++
p.next()
}
typ += p.lit
if !p.is_struct_init {
// Otherwise we get `foo := FooFoo{` because `Foo` was already generated in name_expr()
p.fgen(p.lit)
}
// C.Struct import
if p.lit == 'C' && p.peek() == DOT {
p.next()
p.check(DOT)
typ = p.lit
}
else {
// Package specified? (e.g. gx.Image)
if p.peek() == DOT {
p.next()
p.check(DOT)
typ += '__$p.lit'
}
mut t := p.table.find_type(typ)
// "typ" not found? try "pkg__typ"
if t.name == '' && !p.builtin_pkg {
// && !p.first_run() {
if !typ.contains('array_') && p.pkg != 'main' && !typ.contains('__') {
typ = p.prepend_pkg(typ)
}
t = p.table.find_type(typ)
if t.name == '' && !p.translated && !p.first_run() && !typ.starts_with('[') {
println('get_type() bad type')
// println('all registered types:')
// for q in p.table.types {
// println(q.name)
// }
p.error('unknown type `$typ`')
}
}
}
if typ == 'void' {
p.error('unknown type `$typ`')
}
if mul {
typ += repeat_char(`*`, nr_muls)
}
// Register an []array type
if is_arr2 {
typ = 'array_array_$typ'
p.register_array(typ)
}
else if is_arr {
typ = 'array_$typ'
// p.log('ARR TYPE="$typ" run=$p.run')
// We come across "[]User" etc ?
p.register_array(typ)
}
p.next()
if p.tok == QUESTION || is_question {
typ = 'Option_$typ'
p.table.register_type_with_parent(typ, 'Option')
if p.tok == QUESTION {
p.next()
}
}
// Because the code uses * to see if it's a pointer
if typ == 'byteptr' {
return 'byte*'
}
if typ == 'voidptr' {
//if !p.builtin_pkg && p.pkg != 'os' && p.pkg != 'gx' && p.pkg != 'gg' && !p.translated {
//p.error('voidptr can only be used in unsafe code')
//}
return 'void*'
}
if typ.last_index('__') > typ.index('__') {
p.error('2 __ in gettype(): typ="$typ"')
}
return typ
}
fn (p &Parser) print_tok() {
if p.tok == NAME {
println(p.lit)
return
}
if p.tok == STRING {
println('"$p.lit"')
return
}
println(p.tok.str())
}
// statements() returns the type of the last statement
fn (p mut Parser) statements() string {
p.log('statements()')
typ := p.statements_no_curly_end()
if !p.inside_if_expr {
p.genln('}')
}
if p.fileis('if_expr') {
println('statements() ret=$typ line=$p.scanner.line_nr')
}
return typ
}
fn (p mut Parser) statements_no_curly_end() string {
p.cur_fn.open_scope()
if !p.inside_if_expr {
p.genln('')
}
mut i := 0
mut last_st_typ := ''
for p.tok != RCBR && p.tok != EOF && p.tok != CASE && p.tok != DEFAULT {
// println(p.tok.str())
// p.print_tok()
last_st_typ = p.statement(true)
// println('last st typ=$last_st_typ')
if !p.inside_if_expr {
p.genln('')// // end st tok= ${p.strtok()}')
p.fgenln('')
}
i++
if i > 50000 {
p.cgen.save()
p.error('more than 50 000 statements in function `$p.cur_fn.name`')
}
}
if p.tok != CASE && p.tok != DEFAULT {
// p.next()
p.check(RCBR)
}
else {
// p.check(RCBR)
}
p.scanner.fmt_indent--
// println('close scope line=$p.scanner.line_nr')
p.cur_fn.close_scope()
return last_st_typ
}
fn (p mut Parser) genln(s string) {
p.cgen.genln(s)
}
fn (p mut Parser) gen(s string) {
p.cgen.gen(s)
}
// Generate V header from V source
fn (p mut Parser) vh_genln(s string) {
p.vh_lines << s
}
fn (p mut Parser) fmt_inc() {
p.scanner.fmt_indent++
}
fn (p mut Parser) fmt_dec() {
p.scanner.fmt_indent--
}
fn (p mut Parser) statement(add_semi bool) string {
p.cgen.is_tmp = false
tok := p.tok
mut q := ''
switch tok {
case NAME:
next := p.peek()
if p.is_verbose {
println(next.str())
}
// goto_label:
if p.peek() == COLON {
p.fmt_dec()
label := p.check_name()
p.fmt_inc()
p.genln(label + ':')
p.check(COLON)
return ''
}
else if p.peek() == DECL_ASSIGN {
p.log('var decl')
p.var_decl()
}
else if p.lit == 'jsdecode' {
p.js_decode()
}
else {
// "a + 3", "a(7)" or maybe just "a"
q = p.bool_expression()
}
case GOTO:
p.check(GOTO)
p.fgen(' ')
label := p.check_name()
p.genln('goto $label;')
return ''
case HASH:
p.chash()
return ''
case DOLLAR:
p.comp_time()
case IF:
p.if_st(false)
case FOR:
p.for_st()
case SWITCH, MATCH:
p.switch_statement()
case MUT, STATIC:
p.var_decl()
case RETURN:
p.return_st()
case LCBR:// {} block
p.next()
p.genln('{')
p.statements()
return ''
case CONTINUE:
if p.for_expr_cnt == 0 {
p.error('`continue` statement outside `for`')
}
p.genln('continue')
p.next()
case BREAK:
if p.for_expr_cnt == 0 {
p.error('`break` statement outside `for`')
}
p.genln('break')
p.next()
case GO:
p.go_statement()
case ASSERT:
p.assert_statement()
default:
// An expression as a statement
typ := p.expression()
if p.inside_if_expr {
}
else {
p.genln('; ')
}
return typ
}
// ? : uses , as statement separators
if p.inside_if_expr && p.tok != RCBR {
p.gen(', ')
}
if add_semi && !p.inside_if_expr {
p.genln(';')
}
return q
// p.cgen.end_statement()
}
// is_map: are we in map assignment? (m[key] = val) if yes, dont generate '='
// this can be `user = ...` or `user.field = ...`, in both cases `v` is `user`
fn (p mut Parser) assign_statement(v Var, ph int, is_map bool) {
p.log('assign_statement() name=$v.name tok=')
// p.print_tok()
// p.gen(name)
// p.assigned_var = name
tok := p.tok
if !v.is_mut && !v.is_arg && !p.translated {
p.error('`$v.name` is immutable')
}
if !v.is_mut && p.is_play && !p.builtin_pkg && !p.translated {
// no mutable args in play
p.error('`$v.name` is immutable')
}
is_str := v.typ == 'string'
switch tok {
case ASSIGN:
if !is_map {
p.gen(' = ')
}
case PLUS_ASSIGN:
if is_str {
p.gen('= string_add($v.name, ')// TODO can't do `foo.bar += '!'`
}
else if !is_map {
p.gen(' += ')
}
default:
if tok != MINUS_ASSIGN && tok != MULT_ASSIGN && tok != XOR_ASSIGN
&& tok != MOD_ASSIGN && tok != AND_ASSIGN && tok != OR_ASSIGN
&& tok != RIGHT_SHIFT_ASSIGN && tok != LEFT_SHIFT_ASSIGN && tok != DIV_ASSIGN {
p.gen(' ' + p.tok.str() + ' ')
}
}
p.fgen(' ' + p.tok.str() + ' ')
p.next()
pos := p.cgen.cur_line.len
expr_type := p.bool_expression()
// Allow `num = 4` where `num` is an `?int`
if p.assigned_type.starts_with('Option_') && expr_type == p.assigned_type.right('Option_'.len) {
println('allowing option asss')
expr := p.cgen.cur_line.right(pos)
left := p.cgen.cur_line.left(pos)
p.cgen.cur_line = left + 'opt_ok($expr)'
}
else if !p.builtin_pkg && !p.check_types_no_throw(expr_type, p.assigned_type) {
p.scanner.line_nr--
p.error('cannot use type `$expr_type` as type `$p.assigned_type` in assignment')
}
if is_str && tok == PLUS_ASSIGN {
p.gen(')')
}
// p.assigned_var = ''
p.assigned_type = ''
if !v.is_used {
p.cur_fn.mark_var_used(v)
}
}
fn (p mut Parser) var_decl() {
is_mut := p.tok == MUT || p.prev_tok == FOR
is_static := p.tok == STATIC
if p.tok == MUT {
p.check(MUT)
p.fspace()
}
if p.tok == STATIC {
p.check(STATIC)
p.fspace()
}
// println('var decl tok=${p.strtok()} ismut=$is_mut')
name := p.check_name()
p.fgen(' := ')
// Don't allow declaring a variable with the same name. Even in a child scope
// (shadowing is not allowed)
if !p.builtin_pkg && p.cur_fn.known_var(name) {
v := p.cur_fn.find_var(name)
p.error('redefinition of `$name`')
// Check if this variable has already been declared only in the first run.
// Otherwise the is_script code outside main will run in the first run
// since we can't skip the function body since there's no function.
// And the variable will be registered twice.
if p.is_play && p.first_run() && !p.builtin_pkg {
p.error('variable `$name` is already declared.')
}
}
// println('var_decl $name')
// p.assigned_var = name
p.next()// :=
// Generate expression to tmp because we need its type first
// [TYP NAME =] bool_expression()
pos := p.cgen.add_placeholder()
// p.gen('typ $name = ')
// p.gen('/*^^^*/')
mut typ := p.bool_expression()
// p.gen('/*VVV*/')
// Option check ? or {
or_else := p.tok == OR_ELSE
tmp := p.get_tmp()
// assigned_var_copy := p.assigned_var
if or_else {
// Option_User tmp = get_user(1);
// if (!tmp.ok) { or_statement }
// User user = *(User*)tmp.data;
// p.assigned_var = ''
p.cgen.set_placeholder(pos, '$typ $tmp = ')
p.gen(';')
typ = typ.replace('Option_', '')
p.next()
p.check(LCBR)
p.genln('if (!$tmp .ok) {')
p.statements()
p.genln('$typ $name = *($typ*) $tmp . data;')
if !p.returns && p.prev_tok2 != CONTINUE && p.prev_tok2 != BREAK {
println(p.prev_tok2)
p.error('`or` statement must return/continue/break')
}
// p.assigned_var = assigned_var_copy
}
p.register_var(Var {
name: name
typ: typ
is_mut: is_mut
})
mut cgen_typ := typ
if !or_else {
gen_name := p.table.var_cgen_name(name)
// p.cgen.set_placeholder(pos, '$cgen_typ $gen_name = ')
mut nt_gen := p.table.cgen_name_type_pair(gen_name, cgen_typ) + '='
if is_static {
nt_gen = 'static $nt_gen'
// p.gen('static ')
}
p.cgen.set_placeholder(pos, nt_gen)
}
}
fn (p mut Parser) bool_expression() string {
tok := p.tok
typ := p.bterm()
for p.tok == AND || p.tok == OR {
p.gen(' ${p.tok.str()} ')
p.next()
p.check_types(p.bterm(), typ)
}
if typ == '' {
println('curline:')
println(p.cgen.cur_line)
println(tok.str())
p.error('expr() returns empty type')
}
return typ
}
fn (p mut Parser) bterm() string {
ph := p.cgen.add_placeholder()
mut typ = p.expression()
is_str := typ.eq('string')
tok := p.tok
// if tok in [ EQ, GT, LT, LE, GE, NE] {
if tok == EQ || tok == GT || tok == LT || tok == LE || tok == GE || tok == NE {
p.fgen(' ${p.tok.str()} ')
if is_str {
p.gen(',')
}
else {
p.gen(tok.str())
}
p.next()
p.check_types(p.expression(), typ)
typ = 'bool'
if is_str {
p.gen(')')
switch tok {
case EQ: p.cgen.set_placeholder(ph, 'string_eq(')
case NE: p.cgen.set_placeholder(ph, 'string_ne(')
case LE: p.cgen.set_placeholder(ph, 'string_le(')
case GE: p.cgen.set_placeholder(ph, 'string_ge(')
case GT: p.cgen.set_placeholder(ph, 'string_gt(')
case LT: p.cgen.set_placeholder(ph, 'string_lt(')
}
}
}
return typ
}
// also called on *, &
fn (p mut Parser) name_expr() string {
p.log('\nname expr() pass=$p.run tok=${p.tok.str()} $p.lit')
// print('known type:')
// println(p.table.known_type(p.lit))
// hack for struct_init TODO
hack_pos := p.scanner.pos
hack_tok := p.tok
hack_lit := p.lit
// amp
ptr := p.tok == AMP
deref := p.tok == MUL
if ptr || deref {
p.next()
}
if deref {
if p.is_play && !p.builtin_pkg {
p.error('dereferencing is temporarily disabled on the playground, will be fixed soon')
}
}
mut name := p.lit
p.fgen(name)
// known_type := p.table.known_type(name)
orig_name := name
is_c := name == 'C' && p.peek() == DOT
mut is_c_struct_init := is_c && ptr// a := &C.mycstruct{}
if is_c {
p.next()
p.check(DOT)
name = p.lit
p.fgen(name)
// Currently struct init is set to true only we have `&C.Foo{}`, handle `C.Foo{}`:
if !is_c_struct_init && p.peek() == LCBR {
is_c_struct_init = true
}
}
// //////////////////////////
// module ?
// Allow shadowing (gg = gg.newcontext(); gg.draw_triangle())
if p.table.known_pkg(name) && !p.cur_fn.known_var(name) {
// println('"$name" is a known pkg')
pkg := name
p.next()
p.check(DOT)
name = p.lit
p.fgen(name)
name = prepend_pkg(pkg, name)
}
else if !p.table.known_type(name) && !p.cur_fn.known_var(name) &&
!p.table.known_fn(name) && !p.table.known_const(name) && !is_c {
name = p.prepend_pkg(name)
}
// Variable
v := p.cur_fn.find_var(name)
if v.name.len != 0 {
if ptr {
p.gen('& /*vvar*/ ')
}
else if deref {
p.gen('*')
}
mut typ := p.var_expr(v)
// *var
if deref {
if !typ.contains('*') && !typ.ends_with('ptr') {
println('name="$name", t=$v.typ')
p.error('dereferencing requires a pointer, but got `$typ`')
}
typ = typ.replace('ptr', '')// TODO
typ = typ.replace('*', '')// TODO
}
// &var
else if ptr {
typ += '*'
}
return typ
}
// if known_type || is_c_struct_init || (p.first_run() && p.peek() == LCBR) {
// known type? int(4.5) or Color.green (enum)
if p.table.known_type(name) {
// float(5), byte(0), (*int)(ptr) etc
if p.peek() == LPAR || (deref && p.peek() == RPAR) {
// println('CASTT $name')
if deref {
// p.check(RPAR)
// p.next()
name += '*'
}
else if ptr {
name += '*'
}
p.gen('(/*casttt*/')
mut typ := p.cast(name)
p.gen(')')
for p.tok == DOT {
typ = p.dot(typ, 0)
}
return typ
}
// Color.green
else if p.peek() == DOT {
enum_type := p.table.find_type(name)
if !enum_type.is_enum {
p.error('`$name` is not an enum')
}
p.next()
p.check(DOT)
val := p.lit
// println('enum val $val')
p.gen(p.pkg + '__' + enum_type.name + '_' + val)// `color = main__Color_green`
p.next()
return enum_type.name
}
else {
// go back to name start (pkg.name)
p.scanner.pos = hack_pos
p.tok = hack_tok
p.lit = hack_lit
// TODO hack. If it's a C type, we may need to add struct before declaration:
// a := &C.A{} ==> struct A* a = malloc(sizeof(struct A));
if is_c_struct_init && name != 'tm' {
p.cgen.insert_before('struct ')
}
return p.struct_init(is_c_struct_init)
}
}
// C fn
if is_c {
f := Fn {
name: name// .replace('c_', '')
is_c: true
}
p.fn_call(f, 0, '', '')
// Try looking it up. Maybe its defined with "C.fn_name() fn_type",
// then we know what type it returns
cfn := p.table.find_fn(name)
// Not Found? Return 'void*'
if cfn.name == '' {
return 'void*'
}
return cfn.typ
}
// Constant
mut c := p.table.find_const(name)
if c.name != '' && ptr && !c.is_global {
p.error('cannot take the address of constant `$c.name`')
}
if c.name.len != 0 {
if ptr {
// c.ptr = true
p.gen('& /*const*/ ')
}
p.log('calling var expr')
mut typ := p.var_expr(c)
if ptr {
typ += '*'
}
return typ
}
// Function (not method btw, methods are handled in dot())
f := p.table.find_fn(name)
if f.name == '' {
println(p.cur_fn.name)
println(p.cur_fn.args.len)
// if !p.first_run() && !p.translated {
if !p.first_run() {
// println('name_expr():')
// If orig_name is a pkg, then printing undefined: `pkg` tells us nothing
if p.table.known_pkg(orig_name) {
name = name.replace('__', '.')
p.error('undefined: `$name`')
}
else {
p.error('undefined: `$orig_name`')
}
}
p.next()
return 'void'
}
// no () after func, so func is an argument, just gen its name
// TODO verify this and handle errors
if p.peek() != LPAR {
p.gen(p.table.cgen_name(f))
p.next()
return 'void*'
}
// TODO bring back
if f.typ == 'void' && !p.inside_if_expr {
// p.error('`$f.name` used as value')
}
p.log('calling function')
p.fn_call(f, 0, '', '')
// dot after a function call: `get_user().age`
if p.tok == DOT {
mut typ := ''
for p.tok == DOT {
// println('dot #$dc')
typ = p.dot(f.typ, 0)
}
return typ
}
p.log('end of name_expr')
return f.typ
}
fn (p mut Parser) var_expr(v Var) string {
p.log('\nvar_expr() v.name="$v.name" v.typ="$v.typ"')
// println('var expr is_tmp=$p.cgen.is_tmp\n')
// p.gen('VAR EXPR ')
p.cur_fn.mark_var_used(v)
fn_ph := p.cgen.add_placeholder()
p.expr_var = v
p.gen(p.table.var_cgen_name(v.name))
p.next()
mut typ := v.typ
// fn_pointer()
if typ.starts_with('fn ') {
println('CALLING FN PTR')
p.print_tok()
T := p.table.find_type(typ)
p.gen('(')
p.fn_call_args(T.func)
p.gen(')')
typ = T.func.typ
}
// users[0] before dot so that we can have
// users[0].name
if p.tok == LSBR {
typ = p.index_expr(typ, fn_ph)
// ////println('QQQQ KEK $typ')
}
// a.b.c().d chain
// mut dc := 0
for p.tok == DOT {
// println('dot #$dc')
typ = p.dot(typ, fn_ph)
p.log('typ after dot=$typ')
// print('tok after dot()')
// p.print_tok()
// dc++
if p.tok == LSBR {
// typ = p.index_expr(typ, fn_ph, v)
}
}
// a++ and a--
if p.tok == INC || p.tok == DEC {
if !v.is_mut && !v.is_arg && !p.translated {
p.error('`$v.name` is immutable')
}
if typ != 'int' {
if !p.translated && !is_number_type(typ) {
// if T.parent != 'int' {
p.error('cannot ++/-- value of type `$typ`')
}
}
p.gen(p.tok.str())
p.fgen(p.tok.str())
p.next()// ++
// allow a := c++ in translated
if p.translated {
return p.index_expr(typ, fn_ph)
// return typ
}
else {
return 'void'
}
}
typ = p.index_expr(typ, fn_ph)
return typ
}
fn (p &Parser) fileis(s string) bool {
return p.scanner.file_path.contains(s)
}
// user.name => `str_typ` is `User`
// user.company.name => `str_typ` is `Company`
fn (p mut Parser) dot(str_typ string, method_ph int) string {
p.check(DOT)
field_name := p.lit
p.fgen(field_name)
p.log('dot() field_name=$field_name typ=$str_typ')
if p.fileis('hi_test') {
println('dot() field_name=$field_name typ=$str_typ')
}
typ := p.find_type(str_typ)
if typ.name.len == 0 {
p.error('dot(): cannot find type `$str_typ`')
}
has_field := p.table.type_has_field(typ, field_name)
has_method := p.table.type_has_method(typ, field_name)
if !typ.is_c && !has_field && !has_method && !p.first_run() {
// println(typ.str())
if typ.name.starts_with('Option_') {
opt_type := typ.name.substr(7, typ.name.len)
p.error('unhandled option type: $opt_type?')
}
println('dot():')
println('fields:')
for field in typ.fields {
println(field.name)
}
println('methods:')
for field in typ.methods {
println(field.name)
}
println('str_typ=="$str_typ"')
p.error('type `$typ.name` has no field or method `$field_name`')
}
mut dot := '.'
if str_typ.contains('*') {
dot = '->'
}
// field
if has_field {
field := p.table.find_field(typ, field_name)
// Is the next token `=`, `+=` etc? (Are we modifying the field?)
next := p.peek()
modifying := next.is_assign() || next == INC || next == DEC
is_vi := p.fileis('vi')
if !p.builtin_pkg && !p.translated && modifying && !field.is_mut && !is_vi {
p.error('cannot modify immutable field `$field_name` (type `$typ.name`)')
}
if !p.builtin_pkg && p.pkg != typ.pkg {
}
// if p.is_play && field.access_mod == PRIVATE && !p.builtin_pkg && p.pkg != typ.pkg {
// Don't allow `arr.data`
if field.access_mod == PRIVATE && !p.builtin_pkg && !p.translated && p.pkg != typ.pkg {
// println('$typ.name :: $field.name ')
// println(field.access_mod)
p.error('cannot refer to unexported field `$field_name` (type `$typ.name`)')
}
// if field.access_mod == PUBLIC && p.peek() == ASSIGN && !p.builtin_pkg && p.pkg != typ.pkg {
// Don't allow `str.len = 0`
if field.access_mod == PUBLIC && !p.builtin_pkg && p.pkg != typ.pkg {
// if field.name == 'age' {
// println('HOHOH')
// println(next.str())
// }
if !field.is_mut && !p.translated && modifying {
p.error('cannot modify public immutable field `$field_name` (type `$typ.name`)')
}
}
p.gen('${dot}${field_name}')
// p.gen(dot + field_name)
p.next()
return field.typ
}
// method
// mut method := typ.find_method(field_name)
mut method := p.table.find_method(typ, field_name)
p.fn_call(method, method_ph, '', str_typ)
// Methods returning "array" (like slice_fast) should return "array_string"
if method.typ == 'array' && typ.name.starts_with('array_') {
return typ.name
}
// Array Methods returning `voidptr` (like `last()`) should return element type
if method.typ == 'void*' && typ.name.starts_with('array_') {
// return typ.name.replace('array_', '')
return typ.name.right(6)
}
if false && p.tok == LSBR {
// if is_indexer {
return p.index_expr(method.typ, method_ph)
}
return method.typ
}
fn (p mut Parser) index_expr(typ string, fn_ph int) string {
if p.fileis('int_test') {
println('index expr typ=$typ')
}
// a[0]
v := p.expr_var
is_map := typ.starts_with('map_')
is_str := typ == 'string'
is_arr0 := typ.starts_with('array_')
is_arr := is_arr0 || typ == 'array'
is_ptr := typ == 'byte*' || typ == 'byteptr' || typ.contains('*')
is_indexer := p.tok == LSBR
mut close_bracket := false
if is_indexer {
is_fixed_arr := typ[0] == `[`
if !is_str && !is_arr && !is_map && !is_ptr && !is_fixed_arr {
p.error('Cant [] non-array/string/map. Got type "$typ"')
}
p.check(LSBR)
// Get element type (set `typ` to it)
if is_str {
typ = 'byte'
p.fgen('[')
// Direct faster access to .str[i] in builtin package
if p.builtin_pkg {
p.gen('.str[')
close_bracket = true
}
else {
// Bounds check everywhere else
p.gen(',')
}
}
if is_fixed_arr {
// `[10]int` => `int`, `[10][3]int` => `[3]int`
if typ.contains('][') {
pos := typ.index_after('[', 1)
typ = typ.right(pos)
}
else {
typ = typ.all_after(']')
}
p.gen('[')
close_bracket = true
}
else if is_ptr {
// typ = 'byte'
typ = typ.replace('*', '')
// modify(mut []string) fix
if !is_arr {
p.gen('[/*ptr*/')
close_bracket = true
}
}
if is_arr {
p.fgen('[')
// array_int a; a[0]
// type is "array_int", need "int"
// typ = typ.replace('array_', '')
if is_arr0 {
if p.fileis('int_test') {
println('\nRRRR0 $typ')
}
typ = typ.right(6)
if p.fileis('int_test') {
println('RRRR $typ')
}
}
// array a; a.first() voidptr
// type is "array", need "void*"
if typ == 'array' {
typ = 'void*'
}
// No bounds check in translated from C code
if p.translated {
// Cast void* to typ*: add (typ*) to the beginning of the assignment :
// ((int*)a.data = ...
p.cgen.set_placeholder(fn_ph, '(($typ*)(')
p.gen('.data))[')
}
else {
p.gen(',')
}
}
// map is tricky
// need to replace "m[key] = val" with "tmp = val; map_set(&m, key, &tmp)"
// need to replace "m[key]" with "tmp = val; map_get(&m, key, &tmp)"
// can only do that later once we know whether there's an "=" or not
if is_map {
typ = typ.replace('map_', '')
if typ == 'map' {
typ = 'void*'
}
p.gen(',')
}
// expression inside [ ]
if is_arr {
T := p.table.find_type(p.expression())
if T.parent != 'int' {
p.check_types(T.name, 'int')
}
}
else {
p.expression()
}
p.check(RSBR)
// if (is_str && p.builtin_pkg) || is_ptr || is_fixed_arr && ! (is_ptr && is_arr) {
if close_bracket {
p.gen(']/*r$typ $v.is_mut*/')
}
}
// TODO if p.tok in ...
// if p.tok in [ASSIGN, PLUS_ASSIGN, MINUS_ASSIGN]
if p.tok == ASSIGN || p.tok == PLUS_ASSIGN || p.tok == MINUS_ASSIGN ||
p.tok == MULT_ASSIGN || p.tok == DIV_ASSIGN || p.tok == XOR_ASSIGN || p.tok == MOD_ASSIGN ||
p.tok == OR_ASSIGN || p.tok == AND_ASSIGN || p.tok == RIGHT_SHIFT_ASSIGN ||
p.tok == LEFT_SHIFT_ASSIGN {
if is_map || is_arr {
// Don't generate indexer right away, but assign it to tmp
// p.cgen.start_tmp()
}
if is_indexer && is_str && !p.builtin_pkg {
p.error('strings are immutable')
}
// println('111 "$p.cgen.cur_line"')
assign_pos := p.cgen.cur_line.len
p.assigned_type = typ
p.assign_statement(v, fn_ph, is_indexer && (is_map || is_arr))
// m[key] = val
if is_indexer && (is_map || is_arr) {
// a[0] = 7
// curline right now: "a , 0 = 7"
// println('222 "$p.cgen.cur_line"')
// Cant have &7, so need a tmp
tmp := p.get_tmp()
tmp_val := p.cgen.cur_line.right(assign_pos)
p.cgen.cur_line = p.cgen.cur_line.left(assign_pos)
// val := p.cgen.end_tmp()
if is_map {
p.cgen.set_placeholder(fn_ph, 'map__set(&')
}
else {
if is_ptr {
p.cgen.set_placeholder(fn_ph, 'array_set(')
}
else {
p.cgen.set_placeholder(fn_ph, 'array_set(&/*q*/')
}
}
p.gen(', & $tmp)')
p.cgen.insert_before('$typ $tmp = $tmp_val;')
}
return typ
return 'void'
}
// else if p.is_verbose && p.assigned_var != '' {
// p.error('didnt assign')
// }
// m[key]. no =, just a getter
else if (is_map || is_arr || (is_str && !p.builtin_pkg)) && is_indexer {
// Erase var name we generated earlier: "int a = m, 0"
// "m, 0" gets killed since we need to start from scratch. It's messy.
// "m, 0" is an index expression, save it before deleting and insert later in map_get()
index_expr := p.cgen.cur_line.right(fn_ph)
p.cgen.cur_line = p.cgen.cur_line.left(fn_ph)
// Can't pass integer literal, because map_get() requires a void*
tmp := p.get_tmp()
tmp_ok := p.get_tmp()
if is_map {
p.gen('$tmp')
def := type_default(typ)
p.cgen.insert_before('$typ $tmp = $def; bool $tmp_ok = map_get($index_expr, & $tmp);')
}
else if is_arr {
if p.translated {
p.gen('$index_expr ]')
}
else {
p.gen('( *($typ*) array__get($index_expr) )')
}
}
else if is_str && !p.builtin_pkg {
p.gen('string_at($index_expr)')
}
// Zero the string after map_get() if it's nil, numbers are automatically 0
// This is ugly, but what can I do without generics?
// TODO what about user types?
if is_map && typ == 'string' {
// p.cgen.insert_before('if (!${tmp}.str) $tmp = tos("", 0);')
p.cgen.insert_before('if (!$tmp_ok) $tmp = tos("", 0);')
}
}
// else if is_arr && is_indexer{}
return typ
}
// returns resulting type
fn (p mut Parser) expression() string {
if p.scanner.file_path.contains('test_test') {
println('epxression() pass=$p.run tok=')
p.print_tok()
}
p.cgen('/* expr start*/')
ph := p.cgen.add_placeholder()
mut typ := p.term()
is_str := typ.eq('string')
// a << b ==> array2_push(&a, b)
if p.tok == LEFT_SHIFT {
if typ.contains('array_') {
// Can't pass integer literal, because push requires a void*
// a << 7 => int tmp = 7; array_push(&a, &tmp);
// _PUSH(&a, expression(), tmp, string)
tmp := p.get_tmp()
tmp_typ := typ.right(6)// skip "array_"
p.next()
// Get the value we are pushing
p.gen(', (')
// Immutable? Can we push?
if !p.expr_var.is_mut && !p.translated {
p.error('`$p.expr_var.name` is immutable (can\'t <<)')
}
p.check_types(p.expression(), tmp_typ)
// Pass tmp var info to the _PUSH macro
p.gen('), $tmp, $tmp_typ)')
// Prepend tmp initialisation and push call
// Don't dereference if it's already a mutable array argument (`fn foo(mut []int)`)
push_call := if typ.contains('*'){'_PUSH('} else { '_PUSH(&'} // p.cgen.set_placeholder(ph, '_PUSH(&')
p.cgen.set_placeholder(ph, push_call)
return 'void'
}
else {
p.next()
p.gen(' << ')
p.check_types(p.expression(), typ)
return 'int'
}
}
// a in [1,2,3]
if p.tok == IN {
p.fgen(' ')
p.check(IN)
p.fgen(' ')
p.gen(', ')
arr_typ := p.expression()
if !arr_typ.starts_with('array_') {
p.error('`in` requires an array')
}
T := p.table.find_type(arr_typ)
if !T.has_method('contains') {
p.error('$arr_typ has no method `contains`')
}
// `typ` is element type
p.cgen.set_placeholder(ph, '_IN($typ, ')
p.gen(')')
return 'bool'
}
if p.tok == RIGHT_SHIFT {
p.next()
p.gen(' >> ')
p.check_types(p.expression(), typ)
return 'int'
}
if p.tok == DOT {
for p.tok == DOT {
typ = p.dot(typ, 0)
}
}
// + - |
for p.tok == PLUS || p.tok == MINUS || p.tok == PIPE || p.tok == AMP || p.tok == XOR {
// for p.tok in [PLUS, MINUS, PIPE, AMP, XOR] {
tok_op := p.tok
is_num := typ == 'void*' || typ == 'byte*' || is_number_type(typ)
p.next()
if is_str && tok_op == PLUS {
p.cgen.set_placeholder(ph, 'string_add(')
p.gen(',')
}
// 3 + 4
else if is_num {
p.gen(tok_op.str())
}
// Vec + Vec
else {
if p.translated {
p.gen(tok_op.str() + ' /*doom hack*/')// TODO hack to fix DOOM's angle_t
}
else {
p.gen(',')
}
}
p.check_types(p.term(), typ)
if is_str && tok_op == PLUS {
p.gen(')')
}
// Make sure operators are used with correct types
if !p.translated && !is_str && !is_num {
T := p.table.find_type(typ)
if tok_op == PLUS {
if T.has_method('+') {
p.cgen.set_placeholder(ph, typ + '_plus(')
p.gen(')')
}
else {
p.error('operator + not defined on `$typ`')
}
}
else if tok_op == MINUS {
if T.has_method('-') {
p.cgen.set_placeholder(ph, '${typ}_minus(')
p.gen(')')
}
else {
p.error('operator - not defined on `$typ`')
}
}
}
}
return typ
}
fn (p mut Parser) term() string {
line_nr := p.scanner.line_nr
if p.fileis('fn_test') {
println('\nterm() $line_nr')
}
typ := p.unary()
if p.fileis('fn_test') {
println('2: $line_nr')
}
// `*` on a newline? Can't be multiplication, only dereference
if p.tok == MUL && line_nr != p.scanner.line_nr {
return typ
}
for p.tok == MUL || p.tok == DIV || p.tok == MOD {
tok := p.tok
is_div := tok == DIV
is_mod := tok == MOD
// is_mul := tok == MOD
p.next()
p.gen(tok.str())// + ' /*op2*/ ')
p.fgen(' ' + tok.str() + ' ')
if is_div && p.tok == INT && p.lit == '0' {
p.error('division by zero')
}
if is_mod && (is_float_type(typ) || !is_number_type(typ)) {
p.error('operator MOD requires integer types')
}
p.check_types(p.unary(), typ)
}
return typ
}
fn (p mut Parser) unary() string {
mut typ := ''
tok := p.tok
switch tok {
case NOT:
p.gen('!')
p.next()
typ = 'bool'
p.bool_expression()
case BIT_NOT:
p.gen('~')
p.next()
typ = p.bool_expression()
default:
typ = p.factor()
}
return typ
}
fn (p mut Parser) factor() string {
mut typ := ''
tok := p.tok
switch tok {
case INT:
typ = 'int'
// Check if float (`1.0`, `1e+3`) but not if is hexa
if (p.lit.contains('.') || p.lit.contains('e')) &&
!(p.lit[0] == `0` && p.lit[1] == `x`) {
typ = 'f32'
// typ = 'f64' // TODO
}
p.gen(p.lit)
p.fgen(p.lit)
case MINUS:
p.gen('-')
p.fgen('-')
p.next()
return p.factor()
// Variable
case SIZEOF:
p.gen('sizeof(')
p.fgen('sizeof(')
p.next()
p.check(LPAR)
mut sizeof_typ := p.get_type()
if sizeof_typ.ends_with('*') {
// Move * from the end to the beginning, as C requires
sizeof_typ = '*' + sizeof_typ.left(sizeof_typ.len - 1)
}
p.check(RPAR)
p.gen('$sizeof_typ)')
p.fgen('$sizeof_typ)')
return 'int'
case AMP:
return p.name_expr()
case DOT:
return p.name_expr()// `.green` (enum)
case MUL:
return p.name_expr()
case NAME:
// map[string]int
if p.lit == 'map' && p.peek() == LSBR {
return p.map_init()
}
if p.lit == 'json' && p.peek() == DOT {
return p.js_decode()
}
typ = p.name_expr()
return typ
case DEFAULT:
p.next()
p.next()
name := p.check_name()
if name != 'T' {
p.error('default needs T')
}
p.gen('default(T)')
p.next()
return 'T'
case LPAR:
p.gen('(/*lpar*/')
p.next()// (
typ = p.bool_expression()
// Hack. If this `)` referes to a ptr cast `(*int__)__`, it was already checked
// TODO: fix parser so that it doesn't think it's a par expression when it sees `(` in
// __(__*int)(
if !p.ptr_cast {
p.check(RPAR)
}
p.ptr_cast = false
p.gen(')')
return typ
case CHAR:
p.char_expr()
typ = 'byte'
return typ
case STRING:
p.string_expr()
typ = 'string'
return typ
case FALSE:
typ = 'bool'
p.gen('0')
p.fgen('false')
case TRUE:
typ = 'bool'
p.gen('1')
p.fgen('true')
case LSBR:
// `[1,2,3]` or `[]` or `[20]byte`
// TODO have to return because arrayInit does next()
// everything should do next()
return p.array_init()
case LCBR:
// { user | name :'new name' }
return p.assoc()
case IF:
typ = p.if_st(true)
return typ
default:
next := p.peek()
println('PREV=${p.prev_tok.str()}')
println('NEXT=${next.str()}')
p.error('unexpected token: `${p.tok.str()}`')
}
p.next()// TODO everything should next()
return typ
}
// { user | name: 'new name' }
fn (p mut Parser) assoc() string {
// println('assoc()')
p.next()
name := p.check_name()
if !p.cur_fn.known_var(name) {
p.error('unknown variable `$name`')
}
var := p.cur_fn.find_var(name)
p.check(PIPE)
p.gen('($var.typ){')
mut fields := []string// track the fields user is setting, the rest will be copied from the old object
for p.tok != RCBR {
field := p.check_name()
fields << field
p.gen('.$field = ')
p.check(COLON)
p.bool_expression()
p.gen(',')
if p.tok != RCBR {
p.check(COMMA)
}
}
// Copy the rest of the fields
T := p.table.find_type(var.typ)
for ffield in T.fields {
f := ffield.name
if f in fields {
continue
}
p.gen('.$f = $name . $f,')
}
p.check(RCBR)
p.gen('}')
return var.typ
}
fn (p mut Parser) char_expr() {
p.gen('\'$p.lit\'')
p.next()
}
fn format_str(str string) string {
str = str.replace('"', '\\"')
str = str.replace('\n', '\\n')
return str
}
fn (p mut Parser) typ_to_fmt(typ string) string {
t := p.table.find_type(typ)
if t.parent == 'int' {
return '%d'
}
switch typ {
case 'string': return '%.*s'
case 'ustring': return '%.*s'
case 'byte': return '%d'
case 'int': return '%d'
case 'char': return '%d'
case 'byte': return '%d'
case 'bool': return '%d'
case 'u32': return '%d'
case 'f64', 'f32': return '%f'
case 'i64': return '%lld'
case 'byte*': return '%s'
// case 'array_string': return '%s'
// case 'array_int': return '%s'
case 'void': p.error('cannot interpolate this value')
default:
p.error('unhandled sprintf format "$typ" ')
}
return ''
}
fn (p mut Parser) string_expr() {
// println('STRING EXPR')
str := p.lit
p.fgen('\'$str\'')
// No ${}, just return simple string
if p.peek() != DOLLAR {
// println('before format: "$str"')
f := format_str(str)
// println('after format: "$str"')
if p.calling_c || p.translated {
p.gen('"$f"')
}
else {
p.gen('tos2("$f")')// TODO dont call strlen here
}
p.next()
return
}
// tmp := p.get_tmp()
mut args := '"'
mut format := '"'
for p.tok == STRING {
// Add the string between %d's
format += format_str(p.lit)
p.next()// skip $
if p.tok != DOLLAR {
continue
}
// Handle DOLLAR
p.next()
// Get bool expr inside a temp var
p.cgen.start_tmp()
typ := p.bool_expression()
mut val := p.cgen.end_tmp()
val = val.trim_space()
args += ', $val'
if typ == 'string' {
// args += '.str'
// printf("%.*s", a.len, a.str) syntax
args += '.len, ${val}.str'
}
if typ == 'ustring' {
args += '.len, ${val}.s.str'
}
// Custom format? ${t.hour:02d}
custom := p.tok == COLON
if custom {
format += '%'
p.next()
if p.tok == DOT {
format += '.'
p.next()
}
format += p.lit// 02
p.next()
format += p.lit// f
// println('custom str F=$format')
p.next()
}
else {
format += p.typ_to_fmt(typ)
}
}
// println("hello %d", num) optimization.
if p.cgen.nogen {
return
}
// Don't allocate a new string, just print it. TODO HACK PRINT OPT
cur_line := p.cgen.cur_line.trim_space()
if cur_line.contains('println(') && p.tok != PLUS && !p.is_prod && !cur_line.contains('string_add') {
p.cgen.cur_line = cur_line.replace('println(', 'printf(')
p.gen('$format\\n$args')
return
}
// '$age'! means the user wants this to be a tmp string (uses global buffer, no allocation,
// won't be used again)
if p.tok == NOT {
p.next()
p.gen('_STR_TMP($format$args)')
}
else {
// Otherwise do ugly len counting + allocation + sprintf
p.gen('_STR($format$args)')
}
}
// m := map[string]int{}
fn (p mut Parser) map_init() string {
p.next()
p.check(LSBR)
key_type := p.check_name()
if key_type != 'string' {
p.error('only string key maps allowed for now')
}
p.check(RSBR)
val_type := p.check_name()
if !p.table.known_type(val_type) {
p.error('map init unknown type "$val_type"')
}
p.gen('new_map(1, sizeof($val_type))')
p.check(LCBR)
p.check(RCBR)
return 'map_$val_type'
}
// [1,2,3]
fn (p mut Parser) array_init() string {
p.check(LSBR)
is_integer := p.tok == INT
lit := p.lit
mut typ := ''
new_arr_ph := p.cgen.add_placeholder()
mut i := 0
pos := p.cgen.cur_line.len// remember cur line to fetch first number in cgen for [0; 10]
for p.tok != RSBR {
val_typ := p.bool_expression()
// Get type of the first expression
if i == 0 {
typ = val_typ
// fixed width array initialization? (`arr := [20]byte`)
if is_integer && p.tok == RSBR && p.peek() == NAME {
nextc := p.scanner.text[p.scanner.pos + 1]
// TODO whitespace hack
// Make sure there's no space in `[10]byte`
if !nextc.is_space() {
p.check(RSBR)
name := p.check_name()
if p.table.known_type(name) {
p.cgen.cur_line = ''
p.gen('{} /* arkek init*/')
return '[$lit]$name'
}
else {
p.error('bad type `$name`')
}
}
}
}
if val_typ != typ {
if !p.check_types_no_throw(val_typ, typ) {
p.error('bad array element type `$val_typ` instead of `$typ`')
}
}
if p.tok != RSBR && p.tok != SEMICOLON {
p.gen(',')
p.check(COMMA)
}
i++
// Repeat (a = [0;5] )
if i == 1 && p.tok == SEMICOLON {
p.check_space(SEMICOLON)
val := p.cgen.cur_line.right(pos)
// p.cgen.cur_line = ''
p.cgen.cur_line = p.cgen.cur_line.left(pos)
// Special case for zero
if false && val.trim_space() == '0' {
p.gen('array_repeat( & V_ZERO, ')
}
else {
tmp := p.get_tmp()
p.cgen.insert_before('$typ $tmp = $val;')
p.gen('array_repeat(&$tmp, ')
}
p.check_types(p.bool_expression(), 'int')
p.gen(', sizeof($typ) )')
p.check(RSBR)
return 'array_$typ'
}
}
p.check(RSBR)
// type after `]`? (e.g. "[]string")
if p.tok != NAME && i == 0 {
p.error('specify array type: `[]typ` instead of `[]`')
}
if p.tok == NAME && i == 0 {
// vals.len == 0 {
typ = p.get_type()
// println('GOT TYP after [] $typ')
}
// ! after array => no malloc and no copy
no_alloc := p.tok == NOT
if no_alloc {
p.next()
}
// [1,2,3]!! => [3]int{1,2,3}
is_fixed_size := p.tok == NOT
if is_fixed_size {
p.next()
p.gen(' }')
if !p.first_run() {
// If we are defining a const array, we don't need to specify the type:
// `a = {1,2,3}`, not `a = (int[]) {1,2,3}`
if p.inside_const {
p.cgen.set_placeholder(new_arr_ph, '{ ')
}
else {
p.cgen.set_placeholder(new_arr_ph, '($typ[]) { ')
}
}
return '[$i]$typ'
}
// if ptr {
// typ += '_ptr"
// }
mut new_arr := 'new_array_from_c_array'
if no_alloc {
new_arr += '_no_alloc'
}
p.gen(' })')
// p.gen('$new_arr($vals.len, $vals.len, sizeof($typ), ($typ[]) $c_arr );')
// TODO why need !first_run()?? Otherwise it goes to the very top of the out.c file
if !p.first_run() {
p.cgen.set_placeholder(new_arr_ph, '$new_arr($i, $i, sizeof($typ), ($typ[]) { ')
}
typ = 'array_$typ'
p.register_array(typ)
return typ
}
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 $typ;'
}
}
// name == 'User'
fn (p mut Parser) struct_init(is_c_struct_init bool) string {
p.is_struct_init = true
mut typ := p.get_type()
p.scanner.fmt_out.cut(typ.len)
ptr := typ.contains('*')
p.check(LCBR)
// tmp := p.get_tmp()
if !ptr {
if typ == 'tm' {
p.gen('(struct tm) {')// TODO struct tm hack, handle all C structs
}
else {
p.gen('($typ){')
}
}
else {
// TODO tmp hack for 0 pointers init
// &User{!} ==> 0
if p.tok == NOT {
p.next()
p.gen('0')
p.check(RCBR)
return typ
}
mut type_gen := typ.replace('*', '')
// All V types are typedef'ed, C structs aren't, so we need to prepend "struct "
if is_c_struct_init {
type_gen = 'struct $type_gen'
}
// p.gen('malloc(sizeof($type_gen)); \n')
no_star := typ.replace('*', '')
p.gen('ALLOC_INIT($no_star, {')
}
// Loop thru all struct init keys and assign values
// u := User{age:20, name:'bob'}
// Remember which fields were set, so that we dont have to zero them later
mut inited_fields := []string
peek := p.peek()
if peek == COLON || p.tok == RCBR {
t := p.table.find_type(typ)
for p.tok != RCBR {
field := p.check_name()
if !t.has_field(field) {
p.error('`$t.name` has no field `$field`')
}
inited_fields << field
p.gen('.$field = ')
p.check(COLON)
p.fspace()
p.expression()
if p.tok == COMMA {
p.next()
}
if p.tok != RCBR {
p.gen(',')
}
p.fgenln('')
}
// If we already set some fields, need to prepend a comma
if t.fields.len != inited_fields.len && inited_fields.len > 0 {
p.gen(',')
}
// Zero values: init all fields (ints to 0, strings to '' etc)
for i, field in t.fields {
// println('### field.name')
// Skip if this field has already been assigned to
if inited_fields.contains(field.name) {
continue
}
field_typ := field.typ
if !p.builtin_pkg && field_typ.ends_with('*') && field_typ.contains('Cfg') {
p.error('pointer field `${typ}.${field.name}` must be initialized')
}
def_val := type_default(field_typ)
if def_val != '' {
p.gen('.$field.name = $def_val')
if i != t.fields.len - 1 {
p.gen(',')
}
}
}
}
// Point{3,4} syntax
else {
mut T := p.table.find_type(typ)
// Aliases (TODO Hack, implement proper aliases)
if T.fields.len == 0 && T.parent != '' {
T = p.table.find_type(T.parent)
}
for i, ffield in T.fields {
expr_typ := p.bool_expression()
if !p.check_types_no_throw(expr_typ, ffield.typ) {
p.error('field value #${i+1} `$ffield.name` has type `$ffield.typ`, got `$expr_typ` ')
}
if i < T.fields.len - 1 {
if p.tok != COMMA {
p.error('too few values in `$typ` literal (${i+1} instead of $T.fields.len)')
}
p.gen(',')
p.next()
}
}
// Allow `user := User{1,2,3,}`
// The final comma will be removed by vfmt, since we are not calling `p.fgen()`
if p.tok == COMMA {
p.next()
}
if p.tok != RCBR {
p.error('too many fields initialized: `$typ` has $T.fields.len field(s)')
}
}
p.gen('}')
if ptr {
p.gen(')')
}
p.check(RCBR)
p.is_struct_init = false
// println('struct init typ=$typ')
return typ
}
// `f32(3)`
// tok is `f32` or `)` if `(*int)(ptr)`
fn (p mut Parser) cast(typ string) string {
// typ := p.lit
if p.file_path.contains('test') {
println('CAST TYP=$typ tok=')
p.print_tok()
}
p.gen('($typ)(')
// p.fgen(typ)
p.next()
if p.tok == RPAR {
// skip `)` if it's `(*int)(ptr)`, not `int(a)`
p.ptr_cast = true
p.next()
}
p.check(LPAR)
p.gen('/*77*/')
expr_typ := p.bool_expression()
p.check(RPAR)
p.gen(')')
if typ == 'string' && expr_typ == 'int' {
p.error('cannot convert `$expr_typ` to `$typ`')
}
return typ
}
fn (p mut Parser) get_tmp() string {
p.tmp_cnt++
return 'tmp$p.tmp_cnt'
}
fn (p mut Parser) get_tmp_counter() int {
p.tmp_cnt++
return p.tmp_cnt
}
fn os_name_to_ifdef(name string) string {
switch name {
case 'windows': return '_WIN32'
case 'mac': return '__APPLE__'
case 'linux': return '__linux__'
}
panic('bad os ifdef name "$name"')
return ''
}
fn (p mut Parser) comp_time() {
p.next()
if p.tok == IF {
p.next()
not := p.tok == NOT
if not {
p.next()
}
name := p.check_name()
if name in SupportedPlatforms {
ifdef_name := os_name_to_ifdef(name)
if not {
p.genln('#ifndef $ifdef_name')
}
else {
p.genln('#ifdef $ifdef_name')
}
p.check(LCBR)
p.statements_no_curly_end()
if ! (p.tok == DOLLAR && p.peek() == ELSE) {
p.genln('#endif')
}
}
else {
println('Supported platforms:')
println(SupportedPlatforms)
p.error('unknown platform `$name`')
}
}
else if p.tok == FOR {
p.next()
name := p.check_name()
if name != 'field' {
p.error('for field only')
}
p.check(IN)
p.check_name()
p.check(DOT)
p.check_name()// fields
p.check(LCBR)
// for p.tok != RCBR && p.tok != EOF {
res_name := p.check_name()
println(res_name)
p.check(DOT)
p.check(DOLLAR)
p.check(NAME)
p.check(ASSIGN)
p.cgen.start_tmp()
p.bool_expression()
val := p.cgen.end_tmp()
println(val)
p.check(RCBR)
// }
}
else if p.tok == ELSE {
p.next()
p.check(LCBR)
p.genln('#else')
p.statements_no_curly_end()
p.genln('#endif')
}
else {
p.error('bad comptime expr')
}
}
fn (p mut Parser) chash() {
hash := p.lit.trim_space()
// println('chsh() file=$p.file is_sig=${p.is_sig()} hash="$hash"')
p.next()
is_sig := p.is_sig()
if is_sig {
// p.cgen.nogen = true
}
if hash == 'live' {
if p.is_so {
return
}
p.is_live = true
return
}
if hash.starts_with('flag ') {
mut flag := hash.right(5)
// No the right os? Skip!
// mut ok := true
if hash.contains('linux') && p.os != LINUX {
return
}
else if hash.contains('darwin') && p.os != MAC {
return
}
else if hash.contains('windows') && p.os != WINDOWS {
return
}
// Remove "linux" etc from flag
if flag.contains('linux') || flag.contains('darwin') || flag.contains('windows') {
pos := flag.index(' ')
flag = flag.right(pos)
}
flag = flag.trim_space().replace('@VROOT', p.vroot)
if p.table.flags.contains(flag) {
return
}
p.log('adding flag "$flag"')
p.table.flags << flag// .all_after(' '))
// }
return
}
if hash.starts_with('include') {
if p.first_run() && !is_sig {
p.cgen.includes << '#$hash'
return
}
}
else if hash.starts_with('typedef') {
if p.first_run() {
p.cgen.typedefs << '$hash'
}
}
// TODO remove after ui_mac.m is removed
else if hash.contains('embed') {
pos := hash.index('embed') + 5
file := hash.right(pos)
if p.build_mode != DEFAULT_MODE {
p.genln('#include $file')
}
}
else if is_c_pre(hash) {
// Skip not current OS hack
if hash.starts_with('ifdef') {
os := hash.right(6).trim_space()
// println('ifdef "$os" $p.scanner.line_nr')
if os == 'linux' && p.os != LINUX {
// println('linux ifdef skip')
for p.tok != EOF {
if p.tok == HASH && p.lit.contains('else') || p.lit.contains('endif') {
break
}
// println('skipping')
p.next()
}
}
}
// Move defines on top (like old gdefine)
if hash.contains('define') {
p.cgen.includes << '#$hash'
}
else {
p.genln('#$hash')
}
}
else {
if p.cur_fn.name == '' {
// p.error('# outside of fn')
}
p.genln(hash)
}
// p.cgen.nogen = false
// println('HASH=$hash')
}
fn is_c_pre(hash string) bool {
return hash.contains('ifdef') || hash.contains('define') ||
hash.contains('endif') || hash.contains('elif') ||
hash.contains('ifndef') || (hash.contains('else') && !hash.contains('{'))
}
fn (p mut Parser) if_st(is_expr bool) string {
if is_expr {
if p.fileis('if_expr') {
println('IF EXPR')
}
p.inside_if_expr = true
p.gen('(')
}
else {
p.gen('if (')
p.fgen('if ')
}
p.next()
p.check_types(p.bool_expression(), 'bool')
if is_expr {
p.gen(') ? (')
}
else {
p.genln(') {')
p.fgenln('{')
p.genln('/*if*/')
}
p.fgen(' ')
p.check(LCBR)
mut typ := ''
// if { if hack
if p.tok == IF && p.inside_if_expr {
println('AAAWWFAFAF')
typ = p.factor()
println('QWEWQE typ=$typ')
p.next()
}
else {
typ = p.statements()
}
// println('IF TYp=$typ')
if p.tok == ELSE {
p.next()
if p.tok == IF {
p.gen(' else ')
return p.if_st(is_expr)
// return ''
}
if is_expr {
p.gen(') : (')
}
else {
p.genln(' else { ')
p.genln('/*else if*/')
}
p.check(LCBR)
// statements() returns the type of the last statement
typ = p.statements()
p.inside_if_expr = false
if is_expr {
p.gen(')')
}
return typ
}
p.inside_if_expr = false
if p.fileis('test_test') {
println('if ret typ="$typ" line=$p.scanner.line_nr')
}
return typ
}
fn (p mut Parser) for_st() {
p.check(FOR)
p.fgen(' ')
p.for_expr_cnt++
next_tok := p.peek()
debug := p.scanner.file_path.contains('r_draw')
if debug {
println('\n\nFOR {')
}
p.cur_fn.open_scope()
if p.tok == LCBR {
// Infinite loop
p.gen('while (1) {')
}
else if p.tok == MUT {
p.error('`mut` is not required in for loops')
}
// for i := 0; i < 10; i++ {
else if next_tok == DECL_ASSIGN || next_tok == ASSIGN || p.tok == SEMICOLON {
if debug {
println('for 1')
}
p.genln('for (')
if next_tok == DECL_ASSIGN {
p.var_decl()
}
else if p.tok != SEMICOLON {
// allow `for ;; i++ {`
// Allow `for i = 0; i < ...`
p.statement(false)
}
if debug {
println('for 2')
}
p.check(SEMICOLON)
p.gen(' ; ')
p.fgen(' ')
if p.tok != SEMICOLON {
p.bool_expression()
}
if debug {
println('for 3')
}
p.check(SEMICOLON)
p.gen(' ; ')
p.fgen(' ')
if p.tok != LCBR {
p.statement(false)
}
if debug {
println('for 4')
}
p.fgen(' ')
p.genln(') { ')
}
// for i, val in array
else if p.peek() == COMMA {
// for i, val in array { ==>
//
// array_int tmp = array;
// for (int i = 0; i < tmp.len; i++) {
// int val = tmp[i];
i := p.check_name()
p.check(COMMA)
val := p.check_name()
p.fgen(' ')
p.check(IN)
p.fgen(' ')
tmp := p.get_tmp()
p.cgen.start_tmp()
typ := p.bool_expression()
expr := p.cgen.end_tmp()
p.genln('$typ $tmp = $expr ;')
var_typ := typ.right(6)
// typ = strings.Replace(typ, "_ptr", "*", -1)
// Register temp var
val_var := Var {
name: val
typ: var_typ
// parent_fn: p.cur_fn
ptr: typ.contains('*')
}
p.register_var(val_var)
i_var := Var {
name: i
typ: 'int'
// parent_fn: p.cur_fn
is_mut: true
}
p.register_var(i_var)
p.genln(';\nfor (int $i = 0; $i < $tmp .len; $i ++) {')
p.genln('$var_typ $val = (($var_typ *) $tmp . data)[$i];')
}
// `for val in vals`
else if p.peek() == IN {
val := p.check_name()
p.fgen(' ')
p.check(IN)
p.fspace()
tmp := p.get_tmp()
p.cgen.start_tmp()
typ := p.bool_expression()
expr := p.cgen.end_tmp()
// println('if in:')
// println(p.strtok())
is_range := p.tok == DOTDOT
mut range_end := ''
if is_range {
p.check_types(typ, 'int')
p.check_space(DOTDOT)
p.cgen.start_tmp()
p.check_types(p.bool_expression(), 'int')
range_end = p.cgen.end_tmp()
}
is_arr := typ.contains('array')
is_str := typ == 'string'
// ////if !typ.contains('array') && typ != 'string' {
if !is_arr && !is_str && !is_range {
p.error('`for in` requires an array or a string but got `$typ`')
}
p.genln('$typ $tmp = $expr;')
// TODO var_type := if...
mut var_type := ''
if is_arr {
var_type = typ.right(6)// all after `array_`
}
else if is_str {
var_type = 'byte'
}
else if is_range {
var_type = 'int'
}
// println('for typ=$typ vartyp=$var_typ')
// Register temp var
val_var := Var {
name: val
typ: var_type
ptr: typ.contains('*')
}
p.register_var(val_var)
i := p.get_tmp()
if is_range {
p.genln(';\nfor (int $i = $tmp; $i < $range_end; $i++) {')
}
else {
p.genln(';\nfor (int $i = 0; $i < $tmp .len; $i ++) {')
}
if is_arr {
p.genln('$var_type $val = (($var_type *) ${tmp}.data)[$i];')
}
else if is_str {
p.genln('$var_type $val = (($var_type *) ${tmp}.str)[$i];')
}
else if is_range {
p.genln('$var_type $val = $i;')
}
}
else {
// `for a < b {`
p.gen('while (')
p.check_types(p.bool_expression(), 'bool')
p.genln(') {')
}
p.check(LCBR)
p.statements()
p.cur_fn.close_scope()
p.for_expr_cnt--
}
fn (p mut Parser) switch_statement() {
p.next()
p.cgen.start_tmp()
typ := p.bool_expression()
expr := p.cgen.end_tmp()
p.check(LCBR)
mut i := 0
for p.tok == CASE || p.tok == DEFAULT {
if p.tok == DEFAULT {
p.genln('else { // default:')
p.next()
p.check(COLON)
p.statements()
break
}
if i > 0 {
p.gen('else ')
}
p.gen('if (')
// Multiple checks separated by comma
mut got_comma := false
for {
if got_comma {
p.gen(') || ')
}
if typ == 'string' {
p.gen('string_eq($expr, ')
}
else {
p.gen('($expr == ')
}
if p.tok == CASE || p.tok == DEFAULT {
p.next()
}
p.bool_expression()
if p.tok != COMMA {
break
}
p.check(COMMA)
got_comma = true
}
p.check(COLON)
p.gen(')) {')
p.genln('/* case */')
p.statements()
i++
}
}
fn (p mut Parser) assert_statement() {
p.check(ASSERT)
p.fspace()
tmp := p.get_tmp()
p.gen('bool $tmp = ')
p.check_types(p.bool_expression(), 'bool')
// TODO print "expected: got" for failed tests
filename := p.file_path
p.genln(';\n
if (!$tmp) {
puts("\\x1B[31mFAILED: $p.cur_fn.name() in $filename:$p.scanner.line_nr\\x1B[0m");
g_test_ok = 0 ;
// TODO
// Maybe print all vars in a test function if it fails?
}
else {
puts("\\x1B[32mPASSED: $p.cur_fn.name()\\x1B[0m");
}')
}
fn (p mut Parser) return_st() {
p.cgen.insert_before(p.cur_fn.defer)
p.gen('return ')
if p.cur_fn.name == 'main' {
p.gen(' 0')
}
p.check(RETURN)
p.fgen(' ')
fn_returns := p.cur_fn.typ != 'void'
if fn_returns {
if p.tok == RCBR {
p.error('`$p.cur_fn.name` needs to return `$p.cur_fn.typ`')
}
else {
ph := p.cgen.add_placeholder()
expr_type := p.bool_expression()
// Automatically wrap an object inside an option if the function returns an option
if p.cur_fn.typ.ends_with(expr_type) && p.cur_fn.typ.starts_with('Option_') {
p.cgen.set_placeholder(ph, 'opt_ok(& ')
p.gen(')')
}
p.check_types(expr_type, p.cur_fn.typ)
}
}
else {
// Don't allow `return val` in functions that don't return anything
// if p.tok != RCBR && p.tok != HASH {
if false && p.tok == NAME || p.tok == INT {
p.error('function `$p.cur_fn.name` does not return a value')
}
}
p.returns = true
}
fn prepend_pkg(pkg, name string) string {
return '${pkg}__${name}'
}
fn (p &Parser) prepend_pkg(name string) string {
return prepend_pkg(p.pkg, name)
}
fn (p mut Parser) go_statement() {
p.check(GO)
// TODO copypasta of name_expr() ?
// Method
if p.peek() == DOT {
var_name := p.lit
v := p.cur_fn.find_var(var_name)
p.cur_fn.mark_var_used(v)
p.next()
p.check(DOT)
typ := p.table.find_type(v.typ)
mut method := p.table.find_method(typ, p.lit)
p.async_fn_call(method, 0, var_name, v.typ)
}
// Normal function
else {
f := p.table.find_fn(p.lit)
if f.name == 'println' {
p.error('`go` cannot be used with `println`')
}
// println(f.name)
p.async_fn_call(f, 0, '', '')
}
}
fn (p mut Parser) register_var(v Var) {
if v.line_nr == 0 {
v.line_nr = p.scanner.line_nr
}
p.cur_fn.register_var(v)
}
// user:=jsdecode(User, user_json_string)
fn (p mut Parser) js_decode() string {
p.check(NAME)// json
p.check(DOT)
op := p.check_name()
if op == 'decode' {
// User tmp2; tmp2.foo = 0; tmp2.bar = 0;// I forgot to zero vals before => huge bug
// Option_User tmp3 = jsdecode_User(json_parse( s), &tmp2); ;
// if (!tmp3 .ok) {
// return
// }
// User u = *(User*) tmp3 . data; // TODO remove this (generated in or {} block handler)
p.check(LPAR)
typ := p.get_type()
p.check(COMMA)
p.cgen.start_tmp()
p.check_types(p.bool_expression(), 'string')
expr := p.cgen.end_tmp()
p.check(RPAR)
tmp := p.get_tmp()
cjson_tmp := p.get_tmp()
mut decl := '$typ $tmp; '
// Init the struct
T := p.table.find_type(typ)
for field in T.fields {
def_val := type_default(field.typ)
if def_val != '' {
decl += '$tmp . $field.name = $def_val;\n'
}
}
p.gen_json_for_type(T)
decl += 'cJSON* $cjson_tmp = json__json_parse($expr);'
p.cgen.insert_before(decl)
// p.gen('jsdecode_$typ(json_parse($expr), &$tmp);')
p.gen('json__jsdecode_$typ($cjson_tmp, &$tmp); cJSON_Delete($cjson_tmp);')
opt_type := 'Option_$typ'
p.cgen.typedefs << 'typedef Option $opt_type;'
p.table.register_type(opt_type)
return opt_type
}
else if op == 'encode' {
p.check(LPAR)
p.cgen.start_tmp()
typ := p.bool_expression()
T := p.table.find_type(typ)
p.gen_json_for_type(T)
expr := p.cgen.end_tmp()
p.check(RPAR)
p.gen('json__json_print(json__jsencode_$typ($expr))')
return 'string'
}
else {
p.error('bad json op "$op"')
}
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
}
// fmt helpers
fn (scanner mut Scanner) fgen(s string) {
/*
if scanner.fmt_line_empty {
s = repeat_char(`\t`, scanner.fmt_indent) + s
}
scanner.fmt_out.write(s)
scanner.fmt_line_empty = false
*/
}
fn (scanner mut Scanner) fgenln(s string) {
/*
if scanner.fmt_line_empty {
s = repeat_char(`\t`, scanner.fmt_indent) + s
}
scanner.fmt_out.writeln(s)
scanner.fmt_line_empty = true
*/
}
fn (p mut Parser) fgen(s string) {
//p.scanner.fgen(s)
}
fn (p mut Parser) fspace() {
//p.fgen(' ')
}
fn (p mut Parser) fgenln(s string) {
//p.scanner.fgenln(s)
}
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