antlr.v4.runtime.RewriteOperation source code

1 /*
2  * Copyright (c) 2012-2019 The ANTLR Project. All rights reserved.
3  * Use of this file is governed by the BSD 3-clause license that
4  * can be found in the LICENSE.txt file in the project root.
5  */
6 
7 module antlr.v4.runtime.RewriteOperation;
8 
9 import antlr.v4.runtime.TokenStreamRewriter;
10 import std.conv;
11 import std.format;
12 import std.variant;
13 
14 /**
15  * TODO add class description
16  */
17 class RewriteOperation : TokenStreamRewriter
18 {
19 
20     /**
21      * What index into rewrites List are we?
22      */
23     public size_t instructionIndex;
24 
25     /**
26      * Token buffer index.
27      */
28     public size_t index;
29 
30     public Variant text;
31 
32     public this(size_t index)
33     {
34         this.index = index;
35     }
36 
37     public this(size_t index, Variant text)
38     {
39         this.index = index;
40         this.text = text;
41     }
42 
43     /**
44      * Execute the rewrite operation by possibly adding to the buffer.
45      *  Return the index of the next token to operate on.
46      */
47     public size_t execute(ref Variant buf)
48     {
49         return index;
50     }
51 
52     /**
53      * @uml
54      * @override
55      */
56     public override string toString()
57     {
58         import std.array : split;
59         auto opName = this.classinfo.name.split(".")[$-1];
60         return format("<%s@%s:\"%s\">", opName, tokens.get(to!int(index)), text);
61     }
62 
63 }