4 * base class for parsing segments of token array..
7 * We want to make parsing the whole thing easy..
9 * so we do various tricks:
12 * a) white space collased
15 * { } - collapse into first element.
16 ( ) - collapse into first element.
17 [ ] - collapse into first element.
18 * c) items = , seperation within the above..
20 * usage: x = new Collapse(token_array)
29 public class Collapse : TokenStream {
34 public Collapse(Gee.ArrayList<Token> tokens)
40 var ar = this.collapse(this.tokens);
48 // put spaces into prefix of tokens..
52 var ar = new Gee.ArrayList<Token>();
53 var pref = new Gee.ArrayList<Token>();
57 for (var i = 0; i < this.tokens.size; i ++) {
58 var tok = this.tokens[i];
59 if (tok.is("COMM") || tok.is("WHIT")) {
65 foreach(var e in pref) {
68 pref = new Gee.ArrayList<Token>(); // reset pref..
82 Gee.ArrayList<Token> collapse(Gee.ArrayList<Token> ar)
85 var st = new TokenStream(ar);
86 var ret = new Gee.ArrayList<Token>();
89 var tok = st.look(1,true);
91 // Seed.print(TokenStream.toString(ret));
94 // console.log(tok.data);
96 debug("COL: %s", tok.asString());
121 var start = st.cursor;
124 var add = st.balance(tok.data);
126 debug("BALANCE returned %d items\n", add.size);
131 //console.dump(start + '...' + st.cursor);
132 //console.dump(st.tokens);
136 add.remove_at(0); // remove the first element... (as it's the
139 //Seed.print(JSON.stringify(add, null,4));
143 var toks = add.size > 0 ? this.collapse(add) : add;
145 tok.items = new Gee.ArrayList<Gee.ArrayList<Token>>(); //?? needed?
146 tok.props = new Gee.HashMap<string,TokenKeyMap>();
149 if (tok.data != "{") {
150 // paramters or array elements..
151 tok.items = this.toItems(toks, ",");
153 // check for types.. it could be a list of statements.. or object
154 // format "{" "xXXX" ":" << looks for the ':'.. seems to work.. not sure if it's foolproof...
156 var ost = new TokenStream(toks);
157 //console.dump(ost.look(2,true) );
158 if (ost.look(2,true) != null && ost.look(2,true).data == ":") {
159 // object properties...
160 tok.props = this.toProps(toks);
162 // list of statemetns..
163 tok.items = this.toItems(toks, ";{");;
175 //Seed.print(" ADD : " + add.length + " ITEMS: " + tok.items.length);
188 print("OOPS" + tok.type);
203 // array of arrays of tokens
204 Gee.ArrayList<Gee.ArrayList<Token>> toItems(Gee.ArrayList<Token> ar, string sep)
206 var ret = new Gee.ArrayList<Gee.ArrayList<Token>>() ;
207 var g = new Gee.ArrayList<Token>() ;
209 for (var i = 0; i < ar.size; i ++) {
210 if (sep.index_of(ar.get(i).data) < 0) {
215 if ((ar.get(i).data != ";") && g.size> 0 && (g[0].name == "VAR")) {;
222 g = new Gee.ArrayList<Token>() ;
233 Gee.HashMap<string,TokenKeyMap> toProps (Gee.ArrayList<Token> ar)
236 var ret = new Gee.HashMap<string,TokenKeyMap>();
238 var g = new TokenKeyMap();
243 for (var i = 0; i < ar.size; i ++) {
252 state =2; // should be ':'
255 g.vals.add( ar.get(i));
256 if ( ar.get(i).data != ",") {
260 g = new TokenKeyMap();
266 // last.. - if g.val.length is 0 then it's a trailing ','...
267 // we should really throw a syntax error in that case..
268 if (k.length > 0 && g.vals.size > 0) {