Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

67 lines (57 sloc) 1.284 kb
package main
//-------------------------------------------------------------------------
// scope
//-------------------------------------------------------------------------
type scope struct {
parent *scope // nil for universe scope
entities map[string]*decl
}
func new_scope(outer *scope) *scope {
s := new(scope)
s.parent = outer
s.entities = make(map[string]*decl)
return s
}
// returns: new, prev
func advance_scope(s *scope) (*scope, *scope) {
if len(s.entities) == 0 {
return s, s.parent
}
return new_scope(s), s
}
// adds declaration or returns an existing one
func (s *scope) add_named_decl(d *decl) *decl {
return s.add_decl(d.name, d)
}
func (s *scope) add_decl(name string, d *decl) *decl {
decl, ok := s.entities[name]
if !ok {
s.entities[name] = d
return d
}
return decl
}
func (s *scope) replace_decl(name string, d *decl) {
s.entities[name] = d
}
func (s *scope) merge_decl(d *decl) {
decl, ok := s.entities[d.name]
if !ok {
s.entities[d.name] = d
} else {
decl := decl.deep_copy()
decl.expand_or_replace(d)
s.entities[d.name] = decl
}
}
func (s *scope) lookup(name string) *decl {
decl, ok := s.entities[name]
if !ok {
if s.parent != nil {
return s.parent.lookup(name)
} else {
return nil
}
}
return decl
}
Jump to Line
Something went wrong with that request. Please try again.