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compiler: stabilize the interface code generation a little

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This commit is contained in:
Delyan Angelov
2020-03-02 18:10:26 +02:00
committed by GitHub
parent 8fafaf38a3
commit c6107276df
3 changed files with 85 additions and 12 deletions
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18
vlib/compiler/fn.v
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@ -1115,12 +1115,18 @@ fn (p mut Parser) fn_call_args(f mut Fn, generic_param_types []string) {
if arg.typ.ends_with('er') || arg.typ[0] == `I` {
t := p.table.find_type(arg.typ)
if t.cat == .interface_ {
// perform((Speaker) { ._object = &dog,
// _interface_idx = _Speaker_Dog_index })
if !f.is_method {
concrete_type_name := typ.replace('*', '_ptr')
p.cgen.set_placeholder(ph, '($arg.typ) { ._object = &')
p.gen(', ._interface_idx = _${arg.typ}_${concrete_type_name}_index} ')
// NB: here concrete_type_name can be 'Dog' OR 'Dog_ptr'
// cgen should have generated a _I_Dog_to_Speaker conversion function
// C: perform( _I_Dog_to_Speaker((Dog){...}) )
// In case of _ptr, there is no need for conversion, so the generated
// code will be just:
// C: perform( dog_ptr )
concrete_type_name := typ.replace('*', '_ptr')
// concrete_type_name here can be say Dog, or ui__Group_ptr (in vui)
//eprintln('arg.typ: $arg.typ | concrete_type_name: $concrete_type_name ')
if !concrete_type_name.ends_with('_ptr') {
p.cgen.set_placeholder(ph, 'I_${concrete_type_name}_to_${arg.typ}(')
p.gen(')')
}
p.table.add_gen_type(arg.typ, typ)
}