328 lines
7.0 KiB
V
328 lines
7.0 KiB
V
// Copyright (c) 2019-2020 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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module parser
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import v.table
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pub fn (mut p Parser) parse_array_type() table.Type {
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p.check(.lsbr)
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// fixed array
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if p.tok.kind == .number {
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size := p.tok.lit.int()
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p.next()
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p.check(.rsbr)
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elem_type := p.parse_type()
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//sym := p.table.get_type_symbol(elem_type)
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idx := p.table.find_or_register_array_fixed(elem_type, size, 1)
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return table.new_type(idx)
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}
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// array
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p.check(.rsbr)
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elem_type := p.parse_type()
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mut nr_dims := 1
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// detect attr
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not_attr := p.peek_tok.kind != .name && p.peek_tok2.kind !in [.semicolon, .rsbr]
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for p.tok.kind == .lsbr && not_attr {
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p.next()
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p.check(.rsbr)
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nr_dims++
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}
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sym := p.table.get_type_symbol(elem_type)
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idx := p.table.find_or_register_array(elem_type, nr_dims, sym.mod)
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return table.new_type(idx)
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}
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pub fn (mut p Parser) parse_map_type() table.Type {
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p.next()
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if p.tok.kind != .lsbr {
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return table.map_type
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}
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p.check(.lsbr)
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key_type := p.parse_type()
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// key_type_sym := p.get_type_symbol(key_type)
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// if key_type_sym.kind != .string {
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if key_type.idx() != table.string_type_idx {
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p.error('maps can only have string keys for now')
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}
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p.check(.rsbr)
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value_type := p.parse_type()
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idx := p.table.find_or_register_map(key_type, value_type)
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return table.new_type(idx)
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}
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pub fn (mut p Parser) parse_multi_return_type() table.Type {
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p.check(.lpar)
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mut mr_types := []table.Type{}
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for {
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mr_type := p.parse_type()
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mr_types << mr_type
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if p.tok.kind == .comma {
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p.next()
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} else {
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break
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}
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}
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p.check(.rpar)
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idx := p.table.find_or_register_multi_return(mr_types)
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return table.new_type(idx)
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}
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// given anon name based off signature when `name` is blank
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pub fn (mut p Parser) parse_fn_type(name string) table.Type {
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// p.warn('parse fn')
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p.check(.key_fn)
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line_nr := p.tok.line_nr
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args, _, is_variadic := p.fn_args()
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mut return_type := table.void_type
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if p.tok.line_nr == line_nr && p.tok.kind.is_start_of_type() {
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return_type = p.parse_type()
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}
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func := table.Fn{
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name: name
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args: args
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is_variadic: is_variadic
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return_type: return_type
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}
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idx := p.table.find_or_register_fn_type(p.mod, func, false, false)
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return table.new_type(idx)
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}
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pub fn (mut p Parser) parse_type_with_mut(is_mut bool) table.Type {
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typ := p.parse_type()
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if is_mut {
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return typ.set_nr_muls(1)
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}
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return typ
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}
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pub fn (mut p Parser) parse_type() table.Type {
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// optional
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mut is_optional := false
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if p.tok.kind == .question {
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p.next()
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is_optional = true
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}
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mut nr_muls := 0
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if p.tok.kind == .key_mut {
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nr_muls++
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p.next()
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}
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// &Type
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for p.tok.kind == .amp {
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nr_muls++
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p.next()
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}
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language := if p.tok.lit == 'C' {
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table.Language.c
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} else if p.tok.lit == 'JS' {
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table.Language.js
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} else {
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table.Language.v
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}
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if language != .v {
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p.next()
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p.check(.dot)
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}
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mut typ := table.void_type
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if p.tok.kind != .lcbr {
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pos := p.tok.position()
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typ = p.parse_any_type(language, nr_muls > 0)
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if typ == table.void_type {
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p.error_with_pos('use `?` instead of `?void`', pos)
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}
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}
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if is_optional {
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typ = typ.set_flag(.optional)
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}
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if nr_muls > 0 {
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typ = typ.set_nr_muls(nr_muls)
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}
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return typ
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}
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pub fn (mut p Parser) parse_any_type(language table.Language, is_ptr bool) table.Type {
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mut name := p.tok.lit
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if language == .c {
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name = 'C.$name'
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} else if language == .js {
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name = 'JS.$name'
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} else if p.peek_tok.kind == .dot {
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// `module.Type`
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// /if !(p.tok.lit in p.table.imports) {
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if !p.known_import(name) {
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println(p.table.imports)
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p.error('unknown module `$p.tok.lit`')
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}
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if p.tok.lit in p.imports {
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p.register_used_import(p.tok.lit)
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}
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p.next()
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p.check(.dot)
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// prefix with full module
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name = '${p.imports[name]}.$p.tok.lit'
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} else if p.expr_mod != '' {
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name = p.expr_mod + '.' + name
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} else if p.mod !in ['builtin'] && name !in p.table.type_idxs && name.len > 1 {
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// `Foo` in module `mod` means `mod.Foo`
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name = p.mod + '.' + name
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}
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// p.warn('get type $name')
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match p.tok.kind {
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.key_fn {
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// func
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return p.parse_fn_type('')
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}
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.lsbr {
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// array
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return p.parse_array_type()
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}
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.lpar {
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// multiple return
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if is_ptr {
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p.error('parse_type: unexpected `&` before multiple returns')
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}
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return p.parse_multi_return_type()
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}
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else {
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// no defer
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if name == 'map' {
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return p.parse_map_type()
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}
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defer {
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p.next()
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}
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match name {
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'voidptr' {
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return table.voidptr_type
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}
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'byteptr' {
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return table.byteptr_type
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}
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'charptr' {
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return table.charptr_type
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}
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'i8' {
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return table.i8_type
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}
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'i16' {
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return table.i16_type
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}
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'int' {
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return table.int_type
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}
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'i64' {
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return table.i64_type
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}
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'byte' {
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return table.byte_type
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}
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'u16' {
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return table.u16_type
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}
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'u32' {
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return table.u32_type
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}
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'u64' {
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return table.u64_type
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}
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'f32' {
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return table.f32_type
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}
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'f64' {
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return table.f64_type
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}
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'string' {
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return table.string_type
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}
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'char' {
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return table.char_type
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}
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'bool' {
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return table.bool_type
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}
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else {
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if name.len == 1 && name[0].is_capital() {
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return p.parse_generic_template_type(name)
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}
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if p.peek_tok.kind == .lt {
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return p.parse_generic_struct_inst_type(name)
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}
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return p.parse_enum_or_struct_type(name)
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}
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}
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}
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}
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}
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pub fn (mut p Parser) parse_enum_or_struct_type(name string) table.Type {
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// struct / enum / placeholder
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// struct / enum
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mut idx := p.table.find_type_idx(name)
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if idx > 0 {
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return table.new_type(idx)
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}
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// not found - add placeholder
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idx = p.table.add_placeholder_type(name)
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// println('NOT FOUND: $name - adding placeholder - $idx')
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return table.new_type(idx)
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}
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pub fn (mut p Parser) parse_generic_template_type(name string) table.Type {
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mut idx := p.table.find_type_idx(name)
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if idx > 0 {
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return table.new_type(idx).set_flag(.generic)
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}
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idx = p.table.register_type_symbol(table.TypeSymbol{
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name: name
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kind: .any
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is_public: true
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})
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return table.new_type(idx).set_flag(.generic)
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}
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pub fn (mut p Parser) parse_generic_struct_inst_type(name string) table.Type {
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mut bs_name := name
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p.next()
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bs_name += '<'
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mut generic_types := []table.Type{}
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mut is_instance := false
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for {
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gt := p.parse_type()
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if !gt.has_flag(.generic) {
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is_instance = true
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}
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gts := p.table.get_type_symbol(gt)
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bs_name += gts.name
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generic_types << gt
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if p.tok.kind != .comma {
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break
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}
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p.next()
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bs_name += ','
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}
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p.check(.gt)
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bs_name += '>'
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if is_instance && generic_types.len > 0 {
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mut gt_idx := p.table.find_type_idx(bs_name)
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if gt_idx > 0 {
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return table.new_type(gt_idx)
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}
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gt_idx = p.table.add_placeholder_type(bs_name)
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idx := p.table.register_type_symbol(table.TypeSymbol{
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kind: .generic_struct_inst
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name: bs_name
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info: table.GenericStructInst{
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parent_idx: p.table.type_idxs[name]
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generic_types: generic_types
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}
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})
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return table.new_type(idx)
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}
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return p.parse_enum_or_struct_type(name)
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}
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