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Filename : 04_generic_api_sentinel.go
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// Code generated by re2c, DO NOT EDIT.
//line "go/eof/04_generic_api_sentinel.re":1
//go:generate re2go $INPUT -o $OUTPUT
package main

import "testing"

// Returns "fake" terminating null if cursor has reached limit.
func peek(str string, cursor int, limit int) byte {
	if cursor >= limit {
		return 0 // fake null
	} else {
		return str[cursor]
	}
}

// Expects a string without terminating null.
func lex(str string) int {
	var cursor int
	limit := len(str)
	count := 0
loop:
	
//line "go/eof/04_generic_api_sentinel.go":25
{
	var yych byte
	yych = peek(str, cursor, limit)
	switch (yych) {
	case 0x00:
		goto yy2
	case ' ':
		goto yy6
	case 'a':
		fallthrough
	case 'b':
		fallthrough
	case 'c':
		fallthrough
	case 'd':
		fallthrough
	case 'e':
		fallthrough
	case 'f':
		fallthrough
	case 'g':
		fallthrough
	case 'h':
		fallthrough
	case 'i':
		fallthrough
	case 'j':
		fallthrough
	case 'k':
		fallthrough
	case 'l':
		fallthrough
	case 'm':
		fallthrough
	case 'n':
		fallthrough
	case 'o':
		fallthrough
	case 'p':
		fallthrough
	case 'q':
		fallthrough
	case 'r':
		fallthrough
	case 's':
		fallthrough
	case 't':
		fallthrough
	case 'u':
		fallthrough
	case 'v':
		fallthrough
	case 'w':
		fallthrough
	case 'x':
		fallthrough
	case 'y':
		fallthrough
	case 'z':
		goto yy9
	default:
		goto yy4
	}
yy2:
	cursor += 1
//line "go/eof/04_generic_api_sentinel.re":29
	{ return count }
//line "go/eof/04_generic_api_sentinel.go":93
yy4:
	cursor += 1
//line "go/eof/04_generic_api_sentinel.re":28
	{ return -1 }
//line "go/eof/04_generic_api_sentinel.go":98
yy6:
	cursor += 1
	yych = peek(str, cursor, limit)
	switch (yych) {
	case ' ':
		goto yy6
	default:
		goto yy8
	}
yy8:
//line "go/eof/04_generic_api_sentinel.re":31
	{ goto loop }
//line "go/eof/04_generic_api_sentinel.go":111
yy9:
	cursor += 1
	yych = peek(str, cursor, limit)
	switch (yych) {
	case 'a':
		fallthrough
	case 'b':
		fallthrough
	case 'c':
		fallthrough
	case 'd':
		fallthrough
	case 'e':
		fallthrough
	case 'f':
		fallthrough
	case 'g':
		fallthrough
	case 'h':
		fallthrough
	case 'i':
		fallthrough
	case 'j':
		fallthrough
	case 'k':
		fallthrough
	case 'l':
		fallthrough
	case 'm':
		fallthrough
	case 'n':
		fallthrough
	case 'o':
		fallthrough
	case 'p':
		fallthrough
	case 'q':
		fallthrough
	case 'r':
		fallthrough
	case 's':
		fallthrough
	case 't':
		fallthrough
	case 'u':
		fallthrough
	case 'v':
		fallthrough
	case 'w':
		fallthrough
	case 'x':
		fallthrough
	case 'y':
		fallthrough
	case 'z':
		goto yy9
	default:
		goto yy11
	}
yy11:
//line "go/eof/04_generic_api_sentinel.re":30
	{ count += 1; goto loop }
//line "go/eof/04_generic_api_sentinel.go":174
}
//line "go/eof/04_generic_api_sentinel.re":32

}

func TestLex(t *testing.T) {
	var tests = []struct {
		res int
		str string
	}{
		{0, ""},
		{3, "one two three"},
		{-1, "f0ur"},
	}

	for _, x := range tests {
		t.Run(x.str, func(t *testing.T) {
			res := lex(x.str)
			if res != x.res {
				t.Errorf("got %d, want %d", res, x.res)
			}
		})
	}
}