62 lines
1.7 KiB
V
62 lines
1.7 KiB
V
// Copyright (c) 2019-2022 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 c
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import v.ast
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fn (mut g Gen) unwrap_generic(typ ast.Type) ast.Type {
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if typ.has_flag(.generic) {
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/*
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resolve_generic_to_concrete should not mutate the table.
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It mutates if the generic type is for example []T and the
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concrete type is an array type that has not been registered
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yet. This should have already happened in the checker, since
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it also calls resolve_generic_to_concrete. g.table is made
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non-mut to make sure no one else can accidentally mutates the table.
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*/
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mut muttable := unsafe { &ast.Table(g.table) }
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if t_typ := muttable.resolve_generic_to_concrete(typ, if unsafe { g.cur_fn != 0 } {
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g.cur_fn.generic_names
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} else {
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[]string{}
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}, g.cur_concrete_types)
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{
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return t_typ
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}
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}
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return typ
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}
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struct Type {
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// typ is the original type
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typ ast.Type [required]
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sym &ast.TypeSymbol [required]
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// unaliased is `typ` once aliased have been resolved
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// it may not contain informations such as flags and nr_muls
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unaliased ast.Type [required]
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unaliased_sym &ast.TypeSymbol [required]
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}
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// unwrap returns the following variants of a type:
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// * generics unwrapped
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// * alias unwrapped
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fn (mut g Gen) unwrap(typ ast.Type) Type {
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no_generic := g.unwrap_generic(typ)
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no_generic_sym := g.table.sym(no_generic)
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if no_generic_sym.kind != .alias {
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return Type{
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typ: no_generic
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sym: no_generic_sym
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unaliased: no_generic
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unaliased_sym: no_generic_sym
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}
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}
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return Type{
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typ: no_generic
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sym: no_generic_sym
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unaliased: no_generic_sym.parent_idx
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unaliased_sym: g.table.sym(no_generic_sym.parent_idx)
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}
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}
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