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cgen: fix error for cast to empty interface (fix #14162) (#14176)

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yuyi 2022-04-26 18:26:48 +08:00 committed by GitHub
parent b9a0e2d285
commit 660201c188
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3 changed files with 52 additions and 19 deletions
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18
vlib/v/gen/c/auto_str_methods.v
View File

@ -384,18 +384,18 @@ fn (mut g Gen) gen_str_for_interface(info ast.Interface, styp string, str_fn_nam
clean_interface_v_type_name = util.strip_main_name(clean_interface_v_type_name)
fn_builder.writeln('static string indent_${str_fn_name}($styp x, int indent_count) { /* gen_str_for_interface */')
for typ in info.types {
subtype := g.table.sym(typ)
sub_sym := g.table.sym(ast.mktyp(typ))
mut func_name := g.get_str_fn(typ)
sym_has_str_method, str_method_expects_ptr, _ := subtype.str_method_info()
if should_use_indent_func(subtype.kind) && !sym_has_str_method {
sym_has_str_method, str_method_expects_ptr, _ := sub_sym.str_method_info()
if should_use_indent_func(sub_sym.kind) && !sym_has_str_method {
func_name = 'indent_$func_name'
}
// str_intp
deref := if sym_has_str_method && str_method_expects_ptr { ' ' } else { '*' }
if typ == ast.string_type {
mut val := '${func_name}(${deref}($subtype.cname*)x._$subtype.cname'
if should_use_indent_func(subtype.kind) && !sym_has_str_method {
mut val := '${func_name}(${deref}($sub_sym.cname*)x._$sub_sym.cname'
if should_use_indent_func(sub_sym.kind) && !sym_has_str_method {
val += ', indent_count'
}
val += ')'
@ -403,11 +403,11 @@ fn (mut g Gen) gen_str_for_interface(info ast.Interface, styp string, str_fn_nam
{_SLIT("${clean_interface_v_type_name}(\'"), $c.si_s_code, {.d_s = $val}},
{_SLIT("\')"), 0, {.d_c = 0 }}
}))'
fn_builder.write_string('\tif (x._typ == _${styp}_${subtype.cname}_index)')
fn_builder.write_string('\tif (x._typ == _${styp}_${sub_sym.cname}_index)')
fn_builder.write_string(' return $res;')
} else {
mut val := '${func_name}(${deref}($subtype.cname*)x._$subtype.cname'
if should_use_indent_func(subtype.kind) && !sym_has_str_method {
mut val := '${func_name}(${deref}($sub_sym.cname*)x._$sub_sym.cname'
if should_use_indent_func(sub_sym.kind) && !sym_has_str_method {
val += ', indent_count'
}
val += ')'
@ -415,7 +415,7 @@ fn (mut g Gen) gen_str_for_interface(info ast.Interface, styp string, str_fn_nam
{_SLIT("${clean_interface_v_type_name}("), $c.si_s_code, {.d_s = $val}},
{_SLIT(")"), 0, {.d_c = 0 }}
}))'
fn_builder.write_string('\tif (x._typ == _${styp}_${subtype.cname}_index)')
fn_builder.write_string('\tif (x._typ == _${styp}_${sub_sym.cname}_index)')
fn_builder.write_string(' return $res;\n')
}
}

24
vlib/v/gen/c/cgen.v
View File

@ -859,16 +859,16 @@ pub fn (mut g Gen) write_typeof_functions() {
g.definitions.writeln('static char * v_typeof_interface_${sym.cname}(int sidx);')
g.writeln('static char * v_typeof_interface_${sym.cname}(int sidx) { /* $sym.name */ ')
for t in inter_info.types {
subtype := g.table.sym(t)
g.writeln('\tif (sidx == _${sym.cname}_${subtype.cname}_index) return "${util.strip_main_name(subtype.name)}";')
sub_sym := g.table.sym(ast.mktyp(t))
g.writeln('\tif (sidx == _${sym.cname}_${sub_sym.cname}_index) return "${util.strip_main_name(sub_sym.name)}";')
}
g.writeln('\treturn "unknown ${util.strip_main_name(sym.name)}";')
g.writeln('}')
g.writeln('')
g.writeln('static int v_typeof_interface_idx_${sym.cname}(int sidx) { /* $sym.name */ ')
for t in inter_info.types {
subtype := g.table.sym(t)
g.writeln('\tif (sidx == _${sym.cname}_${subtype.cname}_index) return ${int(t)};')
sub_sym := g.table.sym(ast.mktyp(t))
g.writeln('\tif (sidx == _${sym.cname}_${sub_sym.cname}_index) return ${int(t)};')
}
g.writeln('\treturn ${int(ityp)};')
g.writeln('}')
@ -1319,7 +1319,11 @@ pub fn (mut g Gen) write_interface_typesymbol_declaration(sym ast.TypeSymbol) {
g.type_definitions.writeln('\tunion {')
g.type_definitions.writeln('\t\tvoid* _object;')
for variant in info.types {
vcname := g.table.sym(variant).cname
mk_typ := ast.mktyp(variant)
if mk_typ != variant && mk_typ in info.types {
continue
}
vcname := g.table.sym(mk_typ).cname
g.type_definitions.writeln('\t\t$vcname* _$vcname;')
}
g.type_definitions.writeln('\t};')
@ -2085,11 +2089,11 @@ fn (mut g Gen) expr_with_cast(expr ast.Expr, got_type_raw ast.Type, expected_typ
g.expr(expr)
return
}
if exp_sym.info is ast.Interface && got_type_raw.idx() != expected_type.idx()
if exp_sym.info is ast.Interface && got_type.idx() != expected_type.idx()
&& !expected_type.has_flag(.optional) {
if expr is ast.StructInit && !got_type.is_ptr() {
g.inside_cast_in_heap++
got_styp := g.cc_type(got_type_raw.ref(), true)
got_styp := g.cc_type(got_type.ref(), true)
// TODO: why does cc_type even add this in the first place?
exp_styp := exp_sym.cname
mut fname := 'I_${got_styp}_to_Interface_$exp_styp'
@ -2100,7 +2104,7 @@ fn (mut g Gen) expr_with_cast(expr ast.Expr, got_type_raw ast.Type, expected_typ
got_styp)
g.inside_cast_in_heap--
} else {
got_styp := g.cc_type(got_type_raw, true)
got_styp := g.cc_type(got_type, true)
got_is_shared := got_type.has_flag(.shared_f)
exp_styp := if got_is_shared { '__shared__$exp_sym.cname' } else { exp_sym.cname }
// If it's shared, we need to use the other caster:
@ -5334,10 +5338,10 @@ fn (mut g Gen) interface_table() string {
iinidx_minimum_base := 1000 // Note: NOT 0, to avoid map entries set to 0 later, so `if already_generated_mwrappers[name] > 0 {` works.
mut current_iinidx := iinidx_minimum_base
for st in inter_info.types {
st_sym := g.table.sym(st)
st_sym := g.table.sym(ast.mktyp(st))
// cctype is the Cleaned Concrete Type name, *without ptr*,
// i.e. cctype is always just Cat, not Cat_ptr:
cctype := g.cc_type(st, true)
cctype := g.cc_type(ast.mktyp(st), true)
$if debug_interface_table ? {
eprintln('>> interface name: $isym.name | concrete type: $st.debug() | st symname: $st_sym.name')
}

29
vlib/v/tests/cast_to_empty_interface_test.v Normal file
View File

@ -0,0 +1,29 @@
interface Any {}
fn thing(any Any) string {
return match any {
int { 'int${*any:17}' }
f64 { 'f64${*any:20}' }
else { 'literal type tag?${any:10}' }
}
}
fn test_cast_to_empty_interface() {
mut ret_strings := []string{}
mut arr := [Any(int(11)), int(22), Any(8888), 9999, Any(f64(1.11)), f64(2.22), Any(8.88), 9.99]
for i in arr {
println(thing(i))
ret_strings << thing(i)
}
assert ret_strings.len == 8
assert ret_strings[0] == 'int 11'
assert ret_strings[1] == 'int 22'
assert ret_strings[2] == 'int 8888'
assert ret_strings[3] == 'int 9999'
assert ret_strings[4] == 'f64 1.110'
assert ret_strings[5] == 'f64 2.220'
assert ret_strings[6] == 'f64 8.880'
assert ret_strings[7] == 'f64 9.990'
}