Mercurial Hosting > luan
annotate core/src/luan/impl/LenExpr.java @ 404:d55e873e1f0d
metatables now only apply to tables
author | Franklin Schmidt <fschmidt@gmail.com> |
---|---|
date | Wed, 29 Apr 2015 07:04:40 -0600 |
parents | 3dcb0f9bee82 |
children | d9df6d6cb927 |
rev | line source |
---|---|
166
4eaee12f6c65
move luan/interp to impl
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
114
diff
changeset
|
1 package luan.impl; |
2
4da26b11d12a
start interp
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
2 |
48
64ecb7a3aad7
rename Lua to Luan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
46
diff
changeset
|
3 import luan.Luan; |
64ecb7a3aad7
rename Lua to Luan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
46
diff
changeset
|
4 import luan.LuanTable; |
64ecb7a3aad7
rename Lua to Luan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
46
diff
changeset
|
5 import luan.LuanFunction; |
64ecb7a3aad7
rename Lua to Luan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
46
diff
changeset
|
6 import luan.LuanException; |
64ecb7a3aad7
rename Lua to Luan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
46
diff
changeset
|
7 import luan.LuanSource; |
88
6ca02b188dba
add LuanBit to clean up code;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
49
diff
changeset
|
8 import luan.LuanBit; |
2
4da26b11d12a
start interp
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
9 |
4da26b11d12a
start interp
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
10 |
7
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
3
diff
changeset
|
11 final class LenExpr extends UnaryOpExpr { |
2
4da26b11d12a
start interp
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
12 |
48
64ecb7a3aad7
rename Lua to Luan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
46
diff
changeset
|
13 LenExpr(LuanSource.Element se,Expr op) { |
40
e3624b7cd603
implement stack trace
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
37
diff
changeset
|
14 super(se,op); |
2
4da26b11d12a
start interp
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
15 } |
4da26b11d12a
start interp
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
16 |
49
8ede219cd111
add WebShell
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
48
diff
changeset
|
17 @Override public Object eval(LuanStateImpl luan) throws LuanException { |
8ede219cd111
add WebShell
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
48
diff
changeset
|
18 Object o = op.eval(luan); |
35
e51906de0f11
implement metatables
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
31
diff
changeset
|
19 if( o instanceof String ) { |
e51906de0f11
implement metatables
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
31
diff
changeset
|
20 String s = (String)o; |
46
a443637829c1
remove LuaNumber
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
44
diff
changeset
|
21 return s.length(); |
2
4da26b11d12a
start interp
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
22 } |
114
c599206448b9
minor
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
112
diff
changeset
|
23 if( o instanceof byte[] ) { |
c599206448b9
minor
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
112
diff
changeset
|
24 byte[] a = (byte[])o; |
c599206448b9
minor
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
112
diff
changeset
|
25 return a.length; |
c599206448b9
minor
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
112
diff
changeset
|
26 } |
88
6ca02b188dba
add LuanBit to clean up code;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
49
diff
changeset
|
27 LuanBit bit = luan.bit(se); |
404
d55e873e1f0d
metatables now only apply to tables
Franklin Schmidt <fschmidt@gmail.com>
parents:
171
diff
changeset
|
28 if( !(o instanceof LuanTable) ) |
d55e873e1f0d
metatables now only apply to tables
Franklin Schmidt <fschmidt@gmail.com>
parents:
171
diff
changeset
|
29 throw bit.exception( "attempt to get length of a " + Luan.type(o) + " value" ); |
d55e873e1f0d
metatables now only apply to tables
Franklin Schmidt <fschmidt@gmail.com>
parents:
171
diff
changeset
|
30 LuanTable t = (LuanTable)o; |
d55e873e1f0d
metatables now only apply to tables
Franklin Schmidt <fschmidt@gmail.com>
parents:
171
diff
changeset
|
31 LuanFunction fn = bit.getHandlerFunction("__len",t); |
35
e51906de0f11
implement metatables
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
31
diff
changeset
|
32 if( fn != null ) |
112
f5af13062b10
fix previous rev
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
88
diff
changeset
|
33 return Luan.first(bit.call(fn,"__len",new Object[]{o})); |
404
d55e873e1f0d
metatables now only apply to tables
Franklin Schmidt <fschmidt@gmail.com>
parents:
171
diff
changeset
|
34 return t.length(); |
2
4da26b11d12a
start interp
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
35 } |
4da26b11d12a
start interp
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
36 } |