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cgen: handle `is` for interfaces

pull/4895/head
Alexander Medvednikov 2020-05-14 16:56:45 +02:00
parent b233c24d19
commit 2369a5c8c6
2 changed files with 13 additions and 9 deletions
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9
vlib/v/gen/cgen.v
View File

@ -325,7 +325,7 @@ fn (g &Gen) base_type(t table.Type) string {
fn (mut g Gen) register_optional(t table.Type, styp string) { fn (mut g Gen) register_optional(t table.Type, styp string) {
// g.typedefs2.writeln('typedef Option $x;') // g.typedefs2.writeln('typedef Option $x;')
no_ptr := styp.replace('*','_ptr') no_ptr := styp.replace('*', '_ptr')
g.hotcode_definitions.writeln('typedef struct { g.hotcode_definitions.writeln('typedef struct {
$styp data; $styp data;
string error; string error;
@ -3260,7 +3260,12 @@ fn (mut g Gen) is_expr(node ast.InfixExpr) {
} else { } else {
g.write('.') g.write('.')
} }
g.write('typ == ') sym := g.table.get_type_symbol(node.left_type)
if sym.kind == .interface_ {
g.write('_interface_idx == ')
} else if sym.kind == .sum_type {
g.write('typ == ')
}
g.expr(node.right) g.expr(node.right)
} }

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

@ -26,7 +26,7 @@ fn (c Cat) name_detailed(pet_name string) string {
return '$pet_name the ${typeof(c)}, breed:${c.breed}' return '$pet_name the ${typeof(c)}, breed:${c.breed}'
} }
fn (c mut Cat) set_breed(new string) { fn (mut c Cat) set_breed(new string) {
c.breed = new c.breed = new
} }
@ -49,12 +49,11 @@ fn (d Dog) name_detailed(pet_name string) string {
return '$pet_name the ${typeof(d)}, breed:${d.breed}' return '$pet_name the ${typeof(d)}, breed:${d.breed}'
} }
fn (d mut Dog) set_breed(new string) { fn (mut d Dog) set_breed(new string) {
println('Nah') println('Nah')
} }
// do not add to Dog the utility function 'str', so the default one will be used, as a sample // do not add to Dog the utility function 'str', so the default one will be used, as a sample
fn test_todo() { fn test_todo() {
if true { if true {
} else { } else {
@ -66,9 +65,9 @@ fn perform_speak(a Animal) {
assert true assert true
name := a.name() name := a.name()
assert name == 'Dog' || name == 'Cat' assert name == 'Dog' || name == 'Cat'
// if a is Dog { if a is Dog {
// assert name == 'Dog' assert name == 'Dog'
// } }
println(a.name()) println(a.name())
println('Got animal of type: ${typeof(a)}') // TODO: get implementation type (if possible) println('Got animal of type: ${typeof(a)}') // TODO: get implementation type (if possible)
// assert a is Dog || a is Cat // TODO: enable when available // assert a is Dog || a is Cat // TODO: enable when available
@ -151,7 +150,7 @@ fn test_perform_name_detailed() {
perform_speak(cat_persian2) perform_speak(cat_persian2)
cat_persian2_str := cat_persian2.str() cat_persian2_str := cat_persian2.str()
println("Persian Cat 2: '$cat_persian2_str' ...") println("Persian Cat 2: '$cat_persian2_str' ...")
assert cat_persian2_str == "Custom string conversion for Cat: Persian" assert cat_persian2_str == 'Custom string conversion for Cat: Persian'
println('Test (dummy/empty) on array of animals ...') println('Test (dummy/empty) on array of animals ...')
handle_animals([dog, cat]) handle_animals([dog, cat])
handle_animals_mutable([dog, cat]) handle_animals_mutable([dog, cat])