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interfaces: fix is

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This commit is contained in:
Alexander Medvednikov 2020-05-29 05:54:50 +02:00
parent b3f2c629c6
commit bec3e07635
2 changed files with 21 additions and 3 deletions
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11
vlib/v/gen/cgen.v
View File

@ -3614,6 +3614,11 @@ fn (mut g Gen) is_expr(node ast.InfixExpr) {
sym := g.table.get_type_symbol(node.left_type)
if sym.kind == .interface_ {
g.write('_interface_idx == ')
// `_Animal_Dog_index`
sub_type := node.right as ast.Type
sub_sym := g.table.get_type_symbol(sub_type.typ)
g.write('_${sym.name}_${sub_sym.name}_index')
return
} else if sym.kind == .sum_type {
g.write('typ == ')
}
@ -3662,9 +3667,9 @@ fn (mut g Gen) gen_str_for_type_with_styp(typ table.Type, styp string) string {
}
already_generated_key := '${styp}:${str_fn_name}'
if !sym_has_str_method && already_generated_key !in g.str_types {
$if debugautostr? {
eprintln('> gen_str_for_type_with_styp: |typ: ${typ:5}, ${sym.name:20}|has_str: ${sym_has_str_method:5}|expects_ptr: ${str_method_expects_ptr:5}|nr_args: ${str_nr_args:1}|fn_name: ${str_fn_name:20}')
}
$if debugautostr ? {
eprintln('> gen_str_for_type_with_styp: |typ: ${typ:5}, ${sym.name:20}|has_str: ${sym_has_str_method:5}|expects_ptr: ${str_method_expects_ptr:5}|nr_args: ${str_nr_args:1}|fn_name: ${str_fn_name:20}')
}
g.str_types << already_generated_key
match sym.info {
table.Alias { g.gen_str_default(sym, styp, str_fn_name) }

13
vlib/v/tests/interface_test.v
View File

@ -225,3 +225,16 @@ fn test_interface_ptr_array() {
assert true
assert animals.len == 3
}
fn test_is() {
dog := Dog{}
assert foo2(dog) == 1
}
fn foo2(a Animal) int {
if a is Dog {
return 1
} else {
return 0
}
}