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v/vlib/compiler/parser2.v
Alexander Medvednikov 8dd335295e new enum step 2
2019-11-06 06:26:04 +03:00

170 lines
3.4 KiB
V

module compiler
import strings
fn (p mut Parser) get_type2() Type {
mut mul := false
mut nr_muls := 0
mut typ := ''
mut cat := TypeCategory.struct_
// fn type
if p.tok == .key_fn {
mut f := Fn{name: '_', mod: p.mod}
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 p.tok == .name {
f.typ = p.get_type()
}
else {
f.typ = 'void'
}
// println('fn return typ=$f.typ')
}
else {
f.typ = 'void'
}
// Register anon fn type
fn_typ := Type {
name: f.typ_str()// 'fn (int, int) string'
mod: p.mod
func: f
cat: .func
}
p.table.register_type2(fn_typ)
return fn_typ
}
// arrays ([]int)
mut is_arr := false
mut is_arr2 := false// [][]int TODO remove this and allow unlimited levels of arrays
is_question := p.tok == .question
if is_question {
p.check(.question)
}
if p.tok == .lsbr {
p.check(.lsbr)
// [10]int
if p.tok == .number {
typ = '[$p.lit]'
p.next()
}
else {
is_arr = true
}
p.check(.rsbr)
// [10][3]int
if p.tok == .lsbr {
p.next()
if p.tok == .number {
typ += '[$p.lit]'
p.check(.number)
}
else {
is_arr2 = true
}
p.check(.rsbr)
}
cat = .array
}
// map[string]int
if !p.builtin_mod && p.tok == .name && p.lit == 'map' {
p.next()
p.check(.lsbr)
key_type := p.check_name()
if key_type != 'string' {
p.error('maps only support string keys for now')
}
p.check(.rsbr)
val_type := p.get_type()// p.check_name()
typ = 'map_$val_type'
p.register_map(typ)
return Type{name: typ}
}
//
for p.tok == .mul {
if p.first_pass() {
p.warn('use `&Foo` instead of `*Foo`')
}
mul = true
nr_muls++
p.check(.mul)
}
if p.tok == .amp {
mul = true
nr_muls++
p.check(.amp)
}
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 {
// Module specified? (e.g. gx.Image)
if p.peek() == .dot {
// try resolve full submodule
if !p.builtin_mod && p.import_table.known_alias(typ) {
mod := p.import_table.resolve_alias(typ)
if mod.contains('.') {
typ = mod.replace('.', '_dot_')
}
}
p.next()
p.check(.dot)
typ += '__$p.lit'
}
mut t := p.table.find_type(typ)
// "typ" not found? try "mod__typ"
if t.name == '' && !p.builtin_mod {
// && !p.first_pass() {
if !typ.contains('array_') && p.mod != 'main' && !typ.contains('__') &&
!typ.starts_with('[') {
typ = p.prepend_mod(typ)
}
t = p.table.find_type(typ)
if t.name == '' && !p.pref.translated && !p.first_pass() && !typ.starts_with('[') {
println('get_type() bad type')
// println('all registered types:')
// for q in p.table.types {
// println(q.name)
// }
p.error('unknown type `$typ`')
}
}
}
if typ == 'void' {
p.error('unknown type `$typ`')
}
if mul {
typ += strings.repeat(`*`, nr_muls)
}
// Register an []array type
if is_arr2 {
typ = 'array_array_$typ'
p.register_array(typ)
}
else if is_arr {
typ = 'array_$typ'
// We come across "[]User" etc ?
p.register_array(typ)
}
p.next()
if is_question {
typ = 'Option_$typ'
p.table.register_type_with_parent(typ, 'Option')
}
if typ.last_index('__') > typ.index('__') {
p.error('2 __ in gettype(): typ="$typ"')
}
return Type{name: typ, cat: cat}
}