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package printer
import (
"go/format"
"github.com/mmcloughlin/avo/buildtags"
"github.com/mmcloughlin/avo/internal/prnt"
"github.com/mmcloughlin/avo/ir"
)
type stubs struct {
cfg Config
prnt.Generator
}
// NewStubs constructs a printer for writing stub function declarations.
func NewStubs(cfg Config) Printer {
return &stubs{cfg: cfg}
}
func (s *stubs) Print(f *ir.File) ([]byte, error) {
s.Comment(s.cfg.GeneratedWarning())
if len(f.Constraints) > 0 {
constraints, err := buildtags.Format(f.Constraints)
if err != nil {
s.AddError(err)
}
s.NL()
s.Printf(constraints)
}
s.NL()
s.Printf("package %s\n", s.cfg.Pkg)
for _, fn := range f.Functions() {
s.NL()
s.Comment(fn.Doc...)
for _, pragma := range fn.Pragmas {
s.pragma(pragma)
}
s.Printf("%s\n", fn.Stub())
}
// Apply formatting to the result. This is the simplest way to ensure
// comment formatting rules introduced in Go 1.19 are applied. See
// https://go.dev/doc/comment.
src, err := s.Result()
if err != nil {
return nil, err
}
return format.Source(src)
}
func (s *stubs) pragma(p ir.Pragma) {
s.Printf("//go:%s", p.Directive)
for _, arg := range p.Arguments {
s.Printf(" %s", arg)
}
s.NL()
}
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