// ident generates code for an identifier by loading it into the accumulator.
func (c *compiler) ident(e *ast.Ident, lv *arch.LV, tv types.TypeAndValue) *node {
lv.Ident = true
lv.Type = tv.Type.Underlying()
lv.Name = e.Name
_, isFunc := tv.Type.(*types.Signature)
if isFunc {
if x, ok := c.Uses[e]; ok {
switch x := x.(type) {
case *types.Func:
lv.Storage = x.Storage()
return newNode(opAddr, lv, nil, nil, nil)
case *types.Fwrd:
return newNode(opAddr, lv, nil, nil, nil)
}
}
}
v, found := c.variable(e, c.Uses)
if !found {
lv.Ident = false
return nil
}
s, found := c.symbol(v)
if !found {
lv.Ident = false
return nil
}
_, isRecord := lv.Type.(*types.Record)
// arrays decay to pointers, so we need to get the original type
// because the type and value by the typechecker is recorded as a pointer
array, isArray := v.Type().(*types.Array)
lv.Addr = s.Addr
lv.Value = s.Value
lv.Storage = v.Storage()
switch {
// constants
case tv.Value != nil:
lv.Value = tv.Value
return newNode(opLit, lv, nil, nil, nil)
case isArray:
lv.Type = types.NewPointer(array.Elem(), nil)
return newNode(opAddr, lv, nil, nil, nil)
case isRecord:
lv.Ident = false
return newNode(opAddr, lv, nil, nil, nil)
// variable that a integer or a pointer
default:
lv.Addressable = true
return newNode(opIdent, lv, nil, nil, nil)
}
}
// Pointer returns the size of a pointer.
func (c *Emitter) Pointer() int {
return c.Sizeof(types.NewPointer(types.Typ[types.Int], nil))
}