1package ssa
 2
 3import (
 4	"fmt"
 5	"strings"
 6)
 7
 8// Signature is a function prototype.
 9type Signature struct {
10	// ID is a unique identifier for this signature used to lookup.
11	ID SignatureID
12	// Params and Results are the types of the parameters and results of the function.
13	Params, Results []Type
14
15	// used is true if this is used by the currently-compiled function.
16	// Debugging only.
17	used bool
18}
19
20// String implements fmt.Stringer.
21func (s *Signature) String() string {
22	str := strings.Builder{}
23	str.WriteString(s.ID.String())
24	str.WriteString(": ")
25	if len(s.Params) > 0 {
26		for _, typ := range s.Params {
27			str.WriteString(typ.String())
28		}
29	} else {
30		str.WriteByte('v')
31	}
32	str.WriteByte('_')
33	if len(s.Results) > 0 {
34		for _, typ := range s.Results {
35			str.WriteString(typ.String())
36		}
37	} else {
38		str.WriteByte('v')
39	}
40	return str.String()
41}
42
43// SignatureID is an unique identifier used to lookup.
44type SignatureID int
45
46// String implements fmt.Stringer.
47func (s SignatureID) String() string {
48	return fmt.Sprintf("sig%d", s)
49}