1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
package lexpr
type Token struct {
typ lexType
value string
ivalue int
priority int
leftAssoc bool
}
func (t Token) Number() (int, bool) {
return t.ivalue, t.typ == number
}
func (t Token) String() (string, bool) {
return t.value, t.typ == str
}
func (t Token) Word() (string, bool) {
return t.value, t.typ == word
}
func TokenFromAny(variable any) (Token, bool) {
if s, ok := variable.(string); ok {
return Token{
typ: str,
value: s,
}, true
}
if n, ok := variable.(int); ok {
return Token{
typ: number,
ivalue: n,
}, true
}
if n, ok := variable.(float64); ok {
return Token{
typ: number,
ivalue: int(n),
}, true
}
if n, ok := variable.(float32); ok {
return Token{
typ: number,
ivalue: int(n),
}, true
}
if b, ok := variable.(bool); ok {
n := 0
if b {
n = 1
}
return Token{
typ: number,
ivalue: n,
}, true
}
return Token{}, false
}
func TokenFromWord(wordName string) Token {
return Token{
typ: word,
value: wordName,
}
}
func TokenFromString(s string) Token {
return Token{
typ: str,
value: s,
}
}
func TokenFromInt(n int) Token {
return Token{
typ: number,
ivalue: n,
}
}
|
