func buildNamedParaList(b *builder, lst *ast.ParaList) []*types.Arg {
ret := make([]*types.Arg, lst.Len())
// named typeed list
for i, para := range lst.Paras {
if para.Ident == nil {
b.Errorf(ast.ExprPos(para.Type),
"expect identifer as argument name",
)
return nil
}
name := para.Ident.Lit
if name == "_" {
name = ""
}
ret[i] = &types.Arg{Name: name}
if para.Type == nil {
continue
}
t := b.buildType(para.Type)
if t == nil {
return nil
}
// go back and assign types
for j := i; j >= 0 && ret[j].T == nil; j-- {
ret[j].T = t
}
}
// check that everything has a type
if len(ret) > 0 && ret[len(ret)-1].T == nil {
b.Errorf(lst.Rparen.Pos, "missing type in argument list")
return nil
}
return ret
}
func buildAnonyParaList(b *builder, lst *ast.ParaList) []*types.Arg {
ret := make([]*types.Arg, lst.Len())
for i, para := range lst.Paras {
if para.Ident != nil && para.Type != nil {
// anonymous typed list must all be single
panic("bug")
}
var t types.T
expr := para.Type
if expr == nil {
expr = &ast.Operand{para.Ident}
}
t = b.buildType(expr)
if t == nil {
return nil
}
ret[i] = &types.Arg{T: t}
}
return ret
}