-
Notifications
You must be signed in to change notification settings - Fork 0
/
main.go
76 lines (62 loc) · 1.31 KB
/
main.go
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
package main
import (
"flag"
"fmt"
"math/rand"
"os"
"strings"
"time"
"github.com/Bananenpro/crab/interpreter"
)
func main() {
rand.Seed(time.Now().UnixNano())
verbose := flag.Bool("verbose", false, "Print verbose output.")
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "Usage: %s [options] <file>\n", os.Args[0])
fmt.Fprintf(os.Stderr, "\nOptions:\n")
flag.PrintDefaults()
}
flag.Parse()
if flag.NArg() != 1 {
flag.Usage()
os.Exit(1)
}
sourceFile, err := os.Open(flag.Arg(0))
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to open source file: %s\n", err)
os.Exit(1)
}
tokens, lines, err := interpreter.Scan(sourceFile)
sourceFile.Close()
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
if *verbose {
fmt.Println("Tokens:", tokens)
fmt.Println(strings.Repeat("=", 50))
}
program, errs := interpreter.Parse(tokens, lines)
for _, err := range errs {
fmt.Fprintln(os.Stderr, err)
}
if len(errs) > 0 {
os.Exit(1)
}
err = interpreter.Check(program, lines)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
if *verbose {
for _, stmt := range program {
fmt.Println(interpreter.PrintAST(stmt))
}
fmt.Println(strings.Repeat("=", 50))
}
err = interpreter.Interpret(program, lines)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}