cgen: fix interface fn return with struct_init (#10675)
parent
dacfb71820
commit
59d80e2758
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@ -77,6 +77,7 @@ mut:
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is_sql bool // Inside `sql db{}` statement, generating sql instead of C (e.g. `and` instead of `&&` etc)
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is_shared bool // for initialization of hidden mutex in `[rw]shared` literals
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is_vlines_enabled bool // is it safe to generate #line directives when -g is passed
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is_cast_in_heap bool // fn return struct_init to interface type (cannot use stack, should use heap)
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arraymap_set_pos int // map or array set value position
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vlines_path string // set to the proper path for generating #line directives
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optionals []string // to avoid duplicates TODO perf, use map
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@ -4726,7 +4727,14 @@ fn (mut g Gen) return_stmt(node ast.Return) {
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g.expr(expr0)
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}
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} else {
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g.expr_with_cast(node.exprs[0], node.types[0], g.fn_decl.return_type)
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rs := g.table.get_type_symbol(g.fn_decl.return_type)
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if node.exprs[0] is ast.StructInit && rs.kind == .interface_ && !node.types[0].is_ptr() {
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g.is_cast_in_heap = true
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g.expr_with_cast(node.exprs[0], node.types[0].to_ptr(), g.fn_decl.return_type)
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g.is_cast_in_heap = false
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} else {
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g.expr_with_cast(node.exprs[0], node.types[0], g.fn_decl.return_type)
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}
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}
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if use_tmp_var {
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g.writeln(';')
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@ -4914,7 +4922,7 @@ fn (mut g Gen) struct_init(struct_init ast.StructInit) {
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mut shared_typ := struct_init.typ.set_flag(.shared_f)
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shared_styp = g.typ(shared_typ)
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g.writeln('($shared_styp*)__dup${shared_styp}(&($shared_styp){.mtx = {0}, .val =($styp){')
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} else if is_amp {
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} else if is_amp || g.is_cast_in_heap {
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g.write('($styp*)memdup(&($styp){')
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} else if struct_init.typ.is_ptr() {
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basetyp := g.typ(struct_init.typ.set_nr_muls(0))
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@ -5104,7 +5112,7 @@ fn (mut g Gen) struct_init(struct_init ast.StructInit) {
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g.write('}')
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if g.is_shared && !g.inside_opt_data && !g.is_arraymap_set {
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g.write('}, sizeof($shared_styp))')
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} else if is_amp {
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} else if is_amp || g.is_cast_in_heap {
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g.write(', sizeof($styp))')
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}
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}
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@ -0,0 +1,34 @@
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struct Animal {
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class_name string = 'Animal'
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pub mut:
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interf Adoptable
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}
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interface Adoptable {
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class_name string
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age int
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test int
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}
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struct Cat {
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pub mut:
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class_name string = 'Cat'
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age int = 2
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test int = 2
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}
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fn new_adoptable() Adoptable {
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return Cat{}
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}
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fn test_interface_fn_return_with_struct_init() {
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mut a := Animal{
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interf: new_adoptable()
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}
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println(a.interf.class_name)
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assert a.interf.class_name == 'Cat'
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println(a.interf.age)
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assert a.interf.age == 2
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println(a.interf.test)
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assert a.interf.test == 2
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}
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