mirror of
https://github.com/vlang/v.git
synced 2023-08-10 21:13:21 +03:00
850 lines
23 KiB
V
850 lines
23 KiB
V
// Copyright (c) 2019-2023 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.transformer
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import v.ast
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import v.util
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import v.token
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const maximum_inline_sum_type_variants = 3
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fn (mut p Parser) parse_array_type(expecting token.Kind, is_option bool) ast.Type {
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p.check(expecting)
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// fixed array
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if p.tok.kind in [.number, .name] {
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mut fixed_size := 0
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size_expr := p.expr(0)
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if p.pref.is_fmt {
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fixed_size = 987654321
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} else {
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match size_expr {
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ast.IntegerLiteral {
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fixed_size = size_expr.val.int()
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}
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ast.Ident {
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mut show_non_const_error := false
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if mut const_field := p.table.global_scope.find_const('${p.mod}.${size_expr.name}') {
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if mut const_field.expr is ast.IntegerLiteral {
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fixed_size = const_field.expr.val.int()
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} else {
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if mut const_field.expr is ast.InfixExpr {
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// QUESTION: this should most likely no be done in the parser, right?
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mut t := transformer.new_transformer(p.pref)
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folded_expr := t.infix_expr(mut const_field.expr)
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if folded_expr is ast.IntegerLiteral {
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fixed_size = folded_expr.val.int()
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} else {
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show_non_const_error = true
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}
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} else {
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show_non_const_error = true
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}
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}
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} else {
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if p.pref.is_fmt {
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// for vfmt purposes, pretend the constant does exist
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// it may have been defined in another .v file:
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fixed_size = 1
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} else {
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show_non_const_error = true
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}
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}
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if show_non_const_error {
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p.error_with_pos('non-constant array bound `${size_expr.name}`',
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size_expr.pos)
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}
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}
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else {
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p.error_with_pos('fixed array size cannot use non-constant value',
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size_expr.pos())
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}
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}
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}
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p.check(.rsbr)
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p.fixed_array_dim++
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defer {
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p.fixed_array_dim--
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}
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elem_type := p.parse_type()
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if elem_type.idx() == 0 {
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// error is handled by parse_type
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return 0
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}
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if fixed_size <= 0 {
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p.error_with_pos('fixed size cannot be zero or negative', size_expr.pos())
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}
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idx := p.table.find_or_register_array_fixed(elem_type, fixed_size, size_expr,
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p.fixed_array_dim == 1 && !is_option && p.inside_fn_return)
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if elem_type.has_flag(.generic) {
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return ast.new_type(idx).set_flag(.generic)
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}
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return ast.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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if elem_type.idx() == 0 {
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// error is set in parse_type
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return 0
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}
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if elem_type.idx() == ast.thread_type_idx {
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p.register_auto_import('sync.threads')
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}
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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_token(2).kind !in [.semicolon, .rsbr]
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for p.tok.kind == expecting && 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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idx := p.table.find_or_register_array_with_dims(elem_type, nr_dims)
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if elem_type.has_flag(.generic) {
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return ast.new_type(idx).set_flag(.generic)
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}
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return ast.new_type(idx)
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}
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fn (mut p Parser) parse_map_type() ast.Type {
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is_option := p.tok.kind == .question && p.peek_tok.kind == .name // option map
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if is_option {
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p.next()
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}
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p.next()
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if p.tok.kind != .lsbr {
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return ast.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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if key_type.idx() == 0 {
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// error is reported in parse_type
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return 0
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}
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key_sym := p.table.sym(key_type)
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is_alias := key_sym.kind == .alias
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key_type_supported := key_type in [ast.string_type_idx, ast.voidptr_type_idx]
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|| key_sym.kind in [.enum_, .placeholder, .any]
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|| ((key_type.is_int() || key_type.is_float() || is_alias) && !key_type.is_ptr())
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if !key_type_supported {
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if is_alias {
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p.error('cannot use the alias type as the parent type is unsupported')
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return 0
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}
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s := p.table.type_to_str(key_type)
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p.error_with_pos('maps only support string, integer, float, rune, enum or voidptr keys for now (not `${s}`)',
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p.tok.pos())
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return 0
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}
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p.check(.rsbr)
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value_type := p.parse_type()
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if value_type.idx() == 0 {
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// error is reported in parse_type
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return 0
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}
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if value_type.idx() == ast.void_type_idx {
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p.error_with_pos('map value type cannot be void', p.tok.pos())
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return 0
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}
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idx := p.table.find_or_register_map(key_type, value_type)
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if key_type.has_flag(.generic) || value_type.has_flag(.generic) {
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return ast.new_type(idx).set_flag(.generic)
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}
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if is_option {
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return ast.new_type(idx).set_flag(.option)
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} else {
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return ast.new_type(idx)
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}
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}
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fn (mut p Parser) parse_chan_type() ast.Type {
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if p.peek_tok.kind !in [.name, .key_mut, .amp, .lsbr] {
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p.next()
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return ast.chan_type
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}
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p.register_auto_import('sync')
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p.next()
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p.inside_chan_decl = true
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is_mut := p.tok.kind == .key_mut
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elem_type := p.parse_type()
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p.inside_chan_decl = false
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idx := p.table.find_or_register_chan(elem_type, is_mut)
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if elem_type.has_flag(.generic) {
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return ast.new_type(idx).set_flag(.generic)
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}
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return ast.new_type(idx)
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}
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fn (mut p Parser) parse_thread_type() ast.Type {
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is_opt := p.peek_tok.kind == .question
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if is_opt {
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p.next()
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}
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if p.peek_tok.kind !in [.name, .key_pub, .key_mut, .amp, .lsbr] {
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p.next()
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if is_opt {
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mut ret_type := ast.void_type
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ret_type = ret_type.set_flag(.option)
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idx := p.table.find_or_register_thread(ret_type)
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return ast.new_type(idx)
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} else {
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return ast.thread_type
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}
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}
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if !is_opt {
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p.next()
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}
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if is_opt || p.tok.kind in [.amp, .lsbr]
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|| (p.tok.lit.len > 0 && p.tok.lit[0].is_capital())
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|| ast.builtin_type_names_matcher.matches(p.tok.lit)
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|| p.peek_tok.kind == .dot {
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mut ret_type := p.parse_type()
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if is_opt {
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ret_type = ret_type.set_flag(.option)
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}
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idx := p.table.find_or_register_thread(ret_type)
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if ret_type.has_flag(.generic) {
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return ast.new_type(idx).set_flag(.generic)
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}
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return ast.new_type(idx)
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}
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return ast.thread_type
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}
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fn (mut p Parser) parse_multi_return_type() ast.Type {
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p.check(.lpar)
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mut mr_types := []ast.Type{}
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mut has_generic := false
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for p.tok.kind !in [.eof, .rpar] {
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mr_type := p.parse_type()
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if mr_type.idx() == 0 {
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break
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}
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if mr_type.has_flag(.generic) {
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has_generic = true
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}
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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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if mr_types.len == 1 {
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// no multi return type needed
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return mr_types[0]
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}
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idx := p.table.find_or_register_multi_return(mr_types)
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if has_generic {
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return ast.new_type(idx).set_flag(.generic)
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}
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return ast.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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fn (mut p Parser) parse_fn_type(name string, generic_types []ast.Type) ast.Type {
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fn_type_pos := p.peek_token(-2).pos()
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p.check(.key_fn)
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for attr in p.attrs {
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match attr.name {
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'callconv' {
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if !attr.has_arg {
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p.error_with_pos('callconv attribute is present but its value is missing',
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p.prev_tok.pos())
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}
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if attr.arg !in ['stdcall', 'fastcall', 'cdecl'] {
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p.error_with_pos('unsupported calling convention, supported are stdcall, fastcall and cdecl',
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p.prev_tok.pos())
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}
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}
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else {}
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}
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}
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mut has_generic := false
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line_nr := p.tok.line_nr
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params, _, is_variadic := p.fn_params()
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for param in params {
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if param.typ.has_flag(.generic) {
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has_generic = true
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break
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}
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}
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mut return_type := ast.void_type
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mut return_type_pos := token.Pos{}
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if p.tok.line_nr == line_nr && p.tok.kind.is_start_of_type() && !p.is_attributes() {
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return_type_pos = p.tok.pos()
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return_type = p.parse_type()
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if return_type.has_flag(.generic) {
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has_generic = true
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}
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return_type_pos = return_type_pos.extend(p.prev_tok.pos())
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}
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func := ast.Fn{
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name: name
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params: params
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is_variadic: is_variadic
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return_type: return_type
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return_type_pos: return_type_pos
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generic_names: generic_types.map(p.table.sym(it).name)
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is_method: false
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attrs: p.attrs
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}
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if has_generic && generic_types.len == 0 && name.len > 0 {
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p.error_with_pos('`${name}` type is generic fntype, must specify the generic type names, e.g. ${name}[T]',
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fn_type_pos)
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}
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// MapFooFn typedefs are manually added in cheaders.v
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// because typedefs get generated after the map struct is generated
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has_decl := p.builtin_mod && name.starts_with('Map') && name.ends_with('Fn')
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idx := p.table.find_or_register_fn_type(func, false, has_decl)
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if has_generic {
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return ast.new_type(idx).set_flag(.generic)
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}
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return ast.new_type(idx)
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}
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fn (mut p Parser) parse_type_with_mut(is_mut bool) ast.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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// Parses any language indicators on a type.
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fn (mut p Parser) parse_language() ast.Language {
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language := if p.tok.lit == 'C' {
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ast.Language.c
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} else if p.tok.lit == 'JS' {
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ast.Language.js
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} else if p.tok.lit == 'WASM' {
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ast.Language.wasm
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} else {
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ast.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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return language
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}
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// parse_inline_sum_type parses the type and registers it in case the type is an anonymous sum type.
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// It also takes care of inline sum types where parse_type only parses a standalone type.
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fn (mut p Parser) parse_inline_sum_type() ast.Type {
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if !p.pref.is_fmt {
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p.warn(
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'inline sum types have been deprecated and will be removed on January 1, 2023 due ' +
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'to complicating the language and the compiler too much; define named sum types with `type Foo = Bar | Baz` instead')
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}
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variants := p.parse_sum_type_variants()
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if variants.len > 1 {
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if variants.len > parser.maximum_inline_sum_type_variants {
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pos := variants[0].pos.extend(variants.last().pos)
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p.warn_with_pos('an inline sum type expects a maximum of ${parser.maximum_inline_sum_type_variants} types (${variants.len} were given)',
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pos)
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}
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mut variant_names := variants.map(p.table.sym(it.typ).name)
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variant_names.sort()
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// deterministic name
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name := '_v_anon_sum_type_${variant_names.join('_')}'
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variant_types := variants.map(it.typ)
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prepend_mod_name := p.prepend_mod(name)
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mut idx := p.table.find_type_idx(prepend_mod_name)
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if idx > 0 {
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return ast.new_type(idx)
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}
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idx = p.table.register_sym(ast.TypeSymbol{
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kind: .sum_type
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name: prepend_mod_name
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cname: util.no_dots(prepend_mod_name)
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mod: p.mod
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info: ast.SumType{
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is_anon: true
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variants: variant_types
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}
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})
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return ast.new_type(idx)
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} else if variants.len == 1 {
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return variants[0].typ
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}
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return ast.Type(0)
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}
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// parse_sum_type_variants parses several types separated with a pipe and returns them as a list with at least one node.
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// If there is less than one node, it will add an error to the error list.
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fn (mut p Parser) parse_sum_type_variants() []ast.TypeNode {
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p.inside_sum_type = true
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defer {
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p.inside_sum_type = false
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}
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mut types := []ast.TypeNode{}
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for {
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type_start_pos := p.tok.pos()
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typ := p.parse_type()
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end_comments := p.eat_comments(same_line: true)
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// TODO: needs to be its own var, otherwise TCC fails because of a known stack error
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prev_tok := p.prev_tok
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type_end_pos := prev_tok.pos()
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type_pos := type_start_pos.extend(type_end_pos)
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types << ast.TypeNode{
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typ: typ
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pos: type_pos
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end_comments: end_comments
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}
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if p.tok.kind != .pipe {
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break
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}
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p.check(.pipe)
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}
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return types
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}
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fn (mut p Parser) parse_type() ast.Type {
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// option or result
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mut is_option := false
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mut is_result := false
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line_nr := p.tok.line_nr
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option_pos := p.tok.pos()
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if p.tok.kind == .question {
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p.next()
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is_option = true
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} else if p.tok.kind == .not {
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p.next()
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is_result = true
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}
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if is_option || is_result {
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// maybe the '[' is the start of the field attribute
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is_required_field := p.inside_struct_field_decl && p.tok.kind == .lsbr
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&& p.peek_tok.kind == .name && p.peek_tok.lit == 'required'
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if p.tok.line_nr > line_nr || p.tok.kind in [.comma, .rpar] || is_required_field {
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mut typ := ast.void_type
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if is_option {
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typ = typ.set_flag(.option)
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} else if is_result {
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typ = typ.set_flag(.result)
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}
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return typ
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}
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}
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is_shared := p.tok.kind == .key_shared
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is_atomic := p.tok.kind == .key_atomic
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if is_shared {
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p.register_auto_import('sync')
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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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if p.inside_fn_return {
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p.error_with_pos('cannot use `mut` on fn return type', p.tok.pos())
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} else if p.inside_struct_field_decl {
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p.error_with_pos('cannot use `mut` on struct field type', p.tok.pos())
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}
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}
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if p.tok.kind == .key_mut || is_shared {
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nr_muls++
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p.next()
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}
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if is_atomic {
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p.next()
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}
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if p.tok.kind == .mul {
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p.error('use `&Type` instead of `*Type` when declaring references')
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return 0
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}
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mut nr_amps := 0
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// &Type
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for p.tok.kind == .amp {
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nr_amps++
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nr_muls++
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p.next()
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}
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// Anon structs
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if p.tok.kind == .key_struct {
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p.anon_struct_decl = p.struct_decl(true)
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// Find the registered anon struct type, it was registered above in `p.struct_decl()`
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return p.table.find_type_idx(p.anon_struct_decl.name)
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}
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language := p.parse_language()
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mut typ := ast.void_type
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is_array := p.tok.kind == .lsbr
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pos := p.tok.pos()
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if p.tok.kind != .lcbr {
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typ = p.parse_any_type(language, nr_muls > 0, true, is_option)
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if typ.idx() == 0 {
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// error is set in parse_type
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return 0
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}
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if typ == ast.void_type {
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p.error_with_pos('use `?` instead of `?void`', pos)
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return 0
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}
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sym := p.table.sym(typ)
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if is_option && sym.info is ast.SumType && sym.info.is_anon {
|
|
p.error_with_pos('an inline sum type cannot be an Option', option_pos.extend(p.prev_tok.pos()))
|
|
}
|
|
}
|
|
if is_option {
|
|
typ = typ.set_flag(.option)
|
|
}
|
|
if is_result {
|
|
typ = typ.set_flag(.result)
|
|
}
|
|
if is_shared {
|
|
typ = typ.set_flag(.shared_f)
|
|
}
|
|
if is_atomic {
|
|
typ = typ.set_flag(.atomic_f)
|
|
}
|
|
if typ.idx() == ast.array_type && !p.builtin_mod && p.mod !in ['os', 'strconv', 'sync']
|
|
&& !p.inside_unsafe {
|
|
p.error_with_pos('`array` is an internal type, it cannot be used directly. Use `[]int`, `[]Foo` etc',
|
|
pos)
|
|
}
|
|
if nr_muls > 0 {
|
|
typ = typ.set_nr_muls(nr_muls)
|
|
if is_array && nr_amps > 0 {
|
|
p.error_with_pos('V arrays are already references behind the scenes,
|
|
there is no need to use a reference to an array (e.g. use `[]string` instead of `&[]string`).
|
|
If you need to modify an array in a function, use a mutable argument instead: `fn foo(mut s []string) {}`.',
|
|
pos)
|
|
return 0
|
|
}
|
|
}
|
|
return typ
|
|
}
|
|
|
|
fn (mut p Parser) parse_any_type(language ast.Language, is_ptr bool, check_dot bool, is_option bool) ast.Type {
|
|
mut name := p.tok.lit
|
|
if language == .c {
|
|
name = 'C.${name}'
|
|
} else if language == .js {
|
|
name = 'JS.${name}'
|
|
} else if p.peek_tok.kind == .dot && check_dot && !name[0].is_capital() {
|
|
// `module.Type`
|
|
mut mod := name
|
|
mut mod_pos := p.tok.pos()
|
|
p.next()
|
|
p.check(.dot)
|
|
mut mod_last_part := mod
|
|
for p.peek_tok.kind == .dot {
|
|
mod_pos = mod_pos.extend(p.tok.pos())
|
|
mod_last_part = p.tok.lit
|
|
mod += '.${mod_last_part}'
|
|
p.next()
|
|
p.check(.dot)
|
|
}
|
|
if !p.known_import(mod) && !p.pref.is_fmt {
|
|
mut msg := 'unknown module `${mod}`'
|
|
if mod.len > mod_last_part.len && p.known_import(mod_last_part) {
|
|
msg += '; did you mean `${mod_last_part}`?'
|
|
}
|
|
p.error_with_pos(msg, mod_pos)
|
|
return 0
|
|
}
|
|
if mod in p.imports {
|
|
p.register_used_import(mod)
|
|
mod = p.imports[mod]
|
|
}
|
|
// prefix with full module
|
|
name = '${mod}.${p.tok.lit}'
|
|
if p.tok.lit.len > 0 && !p.tok.lit[0].is_capital() {
|
|
p.error('imported types must start with a capital letter')
|
|
return 0
|
|
}
|
|
} else if p.expr_mod != '' && !p.inside_generic_params {
|
|
// p.expr_mod is from the struct and not from the generic parameter
|
|
name = p.expr_mod + '.' + name
|
|
} else if name in p.imported_symbols {
|
|
name = p.imported_symbols[name]
|
|
} else if !p.builtin_mod && name.len > 1 && name !in p.table.type_idxs {
|
|
// `Foo` in module `mod` means `mod.Foo`
|
|
name = p.mod + '.' + name
|
|
}
|
|
match p.tok.kind {
|
|
.key_fn {
|
|
// func
|
|
return p.parse_fn_type('', []ast.Type{})
|
|
}
|
|
.lsbr, .nilsbr {
|
|
// array
|
|
return p.parse_array_type(p.tok.kind, is_option)
|
|
}
|
|
else {
|
|
if p.tok.kind == .lpar {
|
|
// multiple return
|
|
if is_ptr {
|
|
p.unexpected(prepend_msg: 'parse_type:', got: '`&` before multiple returns')
|
|
return 0
|
|
}
|
|
return p.parse_multi_return_type()
|
|
}
|
|
if ((p.peek_tok.kind == .dot && p.peek_token(3).kind == .pipe)
|
|
|| p.peek_tok.kind == .pipe) && !p.inside_sum_type && !p.inside_receiver_param {
|
|
return p.parse_inline_sum_type()
|
|
}
|
|
if name == 'map' {
|
|
return p.parse_map_type()
|
|
}
|
|
if name == 'chan' {
|
|
return p.parse_chan_type()
|
|
}
|
|
if name == 'thread' {
|
|
return p.parse_thread_type()
|
|
}
|
|
mut ret := ast.Type(0)
|
|
if name == '' {
|
|
// This means the developer is using some wrong syntax like `x: int` instead of `x int`
|
|
p.error('expecting type declaration')
|
|
} else {
|
|
match name {
|
|
'voidptr' {
|
|
ret = ast.voidptr_type
|
|
}
|
|
'byteptr' {
|
|
ret = ast.byteptr_type
|
|
}
|
|
'charptr' {
|
|
ret = ast.charptr_type
|
|
}
|
|
'i8' {
|
|
ret = ast.i8_type
|
|
}
|
|
'i16' {
|
|
ret = ast.i16_type
|
|
}
|
|
'int' {
|
|
ret = ast.int_type
|
|
}
|
|
'i64' {
|
|
ret = ast.i64_type
|
|
}
|
|
'u8' {
|
|
ret = ast.u8_type
|
|
}
|
|
'u16' {
|
|
ret = ast.u16_type
|
|
}
|
|
'u32' {
|
|
ret = ast.u32_type
|
|
}
|
|
'u64' {
|
|
ret = ast.u64_type
|
|
}
|
|
'f32' {
|
|
ret = ast.f32_type
|
|
}
|
|
'f64' {
|
|
ret = ast.f64_type
|
|
}
|
|
'string' {
|
|
ret = ast.string_type
|
|
}
|
|
'char' {
|
|
ret = ast.char_type
|
|
}
|
|
'bool' {
|
|
ret = ast.bool_type
|
|
}
|
|
'float_literal' {
|
|
ret = ast.float_literal_type
|
|
}
|
|
'int_literal' {
|
|
ret = ast.int_literal_type
|
|
}
|
|
'any' {
|
|
if p.file_backend_mode != .js && p.mod != 'builtin' {
|
|
p.error('cannot use `any` type here')
|
|
}
|
|
ret = ast.any_type
|
|
}
|
|
else {
|
|
p.next()
|
|
if name.len == 1 && name[0].is_capital() {
|
|
return p.parse_generic_type(name)
|
|
}
|
|
if p.tok.kind in [.lt, .lsbr]
|
|
&& p.tok.pos - p.prev_tok.pos == p.prev_tok.len {
|
|
return p.parse_generic_inst_type(name)
|
|
}
|
|
return p.find_type_or_add_placeholder(name, language)
|
|
}
|
|
}
|
|
}
|
|
p.next()
|
|
return ret
|
|
}
|
|
}
|
|
}
|
|
|
|
fn (mut p Parser) find_type_or_add_placeholder(name string, language ast.Language) ast.Type {
|
|
// struct / enum / placeholder
|
|
mut idx := p.table.find_type_idx(name)
|
|
if idx > 0 {
|
|
mut typ := ast.new_type(idx)
|
|
sym := p.table.sym(typ)
|
|
match sym.info {
|
|
ast.Struct, ast.Interface, ast.SumType {
|
|
if p.struct_init_generic_types.len > 0 && sym.info.generic_types.len > 0
|
|
&& p.struct_init_generic_types != sym.info.generic_types {
|
|
generic_names := p.struct_init_generic_types.map(p.table.sym(it).name)
|
|
mut sym_name := sym.name + '<'
|
|
for i, gt in generic_names {
|
|
sym_name += gt
|
|
if i != generic_names.len - 1 {
|
|
sym_name += ','
|
|
}
|
|
}
|
|
sym_name += '>'
|
|
existing_idx := p.table.type_idxs[sym_name]
|
|
if existing_idx > 0 {
|
|
idx = existing_idx
|
|
} else {
|
|
idx = p.table.register_sym(ast.TypeSymbol{
|
|
...sym
|
|
name: sym_name
|
|
rname: sym.name
|
|
generic_types: p.struct_init_generic_types.clone()
|
|
})
|
|
}
|
|
typ = ast.new_type(idx)
|
|
}
|
|
}
|
|
ast.Alias {
|
|
if p.inside_fn_return {
|
|
parent_sym := p.table.sym(sym.info.parent_type)
|
|
if parent_sym.kind == .array_fixed {
|
|
info := parent_sym.array_fixed_info()
|
|
typ = p.table.find_or_register_array_fixed(info.elem_type, info.size,
|
|
info.size_expr, p.inside_fn_return)
|
|
}
|
|
}
|
|
}
|
|
else {}
|
|
}
|
|
return typ
|
|
}
|
|
// not found - add placeholder
|
|
idx = p.table.add_placeholder_type(name, language)
|
|
return ast.new_type(idx)
|
|
}
|
|
|
|
fn (mut p Parser) parse_generic_type(name string) ast.Type {
|
|
mut idx := p.table.find_type_idx(name)
|
|
if idx > 0 {
|
|
return ast.new_type(idx).set_flag(.generic)
|
|
}
|
|
idx = p.table.register_sym(ast.TypeSymbol{
|
|
name: name
|
|
cname: util.no_dots(name)
|
|
mod: p.mod
|
|
kind: .any
|
|
is_pub: true
|
|
})
|
|
return ast.new_type(idx).set_flag(.generic)
|
|
}
|
|
|
|
fn (mut p Parser) parse_generic_inst_type(name string) ast.Type {
|
|
mut bs_name := name
|
|
mut bs_cname := name
|
|
start_pos := p.tok.pos()
|
|
p.next()
|
|
p.inside_generic_params = true
|
|
bs_name += '['
|
|
bs_cname += '_T_'
|
|
mut concrete_types := []ast.Type{}
|
|
mut is_instance := true
|
|
for p.tok.kind != .eof {
|
|
mut type_pos := p.tok.pos()
|
|
gt := p.parse_type()
|
|
type_pos = type_pos.extend(p.prev_tok.pos())
|
|
if gt.has_flag(.generic) {
|
|
is_instance = false
|
|
}
|
|
gts := p.table.sym(gt)
|
|
if gts.kind == .multi_return {
|
|
p.error_with_pos('cannot use multi return as generic concrete type', type_pos)
|
|
}
|
|
bs_name += gts.name
|
|
bs_cname += gts.cname
|
|
concrete_types << gt
|
|
if p.tok.kind != .comma {
|
|
break
|
|
}
|
|
p.next()
|
|
bs_name += ', '
|
|
bs_cname += '_'
|
|
}
|
|
if !is_instance {
|
|
p.struct_init_generic_types = concrete_types
|
|
}
|
|
concrete_types_pos := start_pos.extend(p.tok.pos())
|
|
p.next()
|
|
p.inside_generic_params = false
|
|
bs_name += ']'
|
|
// fmt operates on a per-file basis, so is_instance might be not set correctly. Thus it's ignored.
|
|
if (is_instance || p.pref.is_fmt) && concrete_types.len > 0 {
|
|
mut gt_idx := p.table.find_type_idx(bs_name)
|
|
if gt_idx > 0 {
|
|
return ast.new_type(gt_idx)
|
|
}
|
|
gt_idx = p.table.add_placeholder_type(bs_name, .v)
|
|
mut parent_idx := p.table.type_idxs[name]
|
|
if parent_idx == 0 {
|
|
parent_idx = p.table.add_placeholder_type(name, .v)
|
|
}
|
|
parent_sym := p.table.sym(ast.new_type(parent_idx))
|
|
match parent_sym.info {
|
|
ast.Struct {
|
|
if parent_sym.info.generic_types.len == 0 {
|
|
p.error_with_pos('struct `${parent_sym.name}` is not a generic struct, cannot instantiate to the concrete types',
|
|
concrete_types_pos)
|
|
} else if parent_sym.info.generic_types.len != concrete_types.len {
|
|
p.error_with_pos('the number of generic types of struct `${parent_sym.name}` is inconsistent with the concrete types',
|
|
concrete_types_pos)
|
|
}
|
|
}
|
|
ast.Interface {
|
|
if parent_sym.info.generic_types.len == 0 {
|
|
p.error_with_pos('interface `${parent_sym.name}` is not a generic interface, cannot instantiate to the concrete types',
|
|
concrete_types_pos)
|
|
} else if parent_sym.info.generic_types.len != concrete_types.len {
|
|
p.error_with_pos('the number of generic types of interface `${parent_sym.name}` is inconsistent with the concrete types',
|
|
concrete_types_pos)
|
|
}
|
|
}
|
|
ast.SumType {
|
|
if parent_sym.info.generic_types.len == 0 {
|
|
p.error_with_pos('sumtype `${parent_sym.name}` is not a generic sumtype, cannot instantiate to the concrete types',
|
|
concrete_types_pos)
|
|
} else if parent_sym.info.generic_types.len != concrete_types.len {
|
|
p.error_with_pos('the number of generic types of sumtype `${parent_sym.name}` is inconsistent with the concrete types',
|
|
concrete_types_pos)
|
|
}
|
|
}
|
|
else {}
|
|
}
|
|
|
|
idx := p.table.register_sym(ast.TypeSymbol{
|
|
kind: .generic_inst
|
|
name: bs_name
|
|
cname: util.no_dots(bs_cname)
|
|
mod: p.mod
|
|
info: ast.GenericInst{
|
|
parent_idx: parent_idx
|
|
concrete_types: concrete_types
|
|
}
|
|
})
|
|
return ast.new_type(idx)
|
|
}
|
|
return p.find_type_or_add_placeholder(name, .v).set_flag(.generic)
|
|
}
|