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
|
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright (C) 2001 Gerwin Klein <lsf@jflex.de> *
* Copyright (C) 2001 Bernhard Rumpe <rumpe@in.tum.de> *
* All rights reserved. *
* *
* License: BSD *
* *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/**
* AST node for a list of expressions.
*
* The interpretation of a list of expressions stores the
* results of the expressions in an array that can be used
* as parameter list for function calls.
*/
class Texplist implements AST {
Texplist explist; // next list element (optional null)
Texp exp; // expression of this list node
public Texplist(Texplist p, Texp e) {
explist=p;
exp=e;
}
public Texplist(Texp e) {
explist=null;
exp=e;
}
public String toString() {
if (explist!=null)
return explist+","+exp;
else
return exp.toString();
}
public void checkcontext(SymTab st) {
if (explist!=null)
explist.checkcontext(st);
exp.checkcontext(st); // CoCo (DefFun,DefVar,Arity)
} // in expression
public int length() {
if (explist!=null)
return 1+explist.length();
else
return 1;
}
public void prepInterp(SymTab st) { // set pointers and indices
exp.prepInterp(st);
if (explist!=null) explist.prepInterp(st);
}
public void interpret(int[] in, int[] par, int[] res, int index) {
res[index] = exp.interpret(in,par);
if (explist!=null) explist.interpret(in,par,res,index+1);
}
}
|
