Mercurial Hosting > luan
changeset 106:1a29dd3888f6
support standard Lua numeric "for" statement
git-svn-id: https://luan-java.googlecode.com/svn/trunk@107 21e917c8-12df-6dd8-5cb6-c86387c605b9
| author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
|---|---|
| date | Mon, 19 May 2014 06:23:18 +0000 |
| parents | a9560839104d |
| children | dbf459397217 |
| files | src/luan/interp/LuanParser.java |
| diffstat | 1 files changed, 16 insertions(+), 3 deletions(-) [+] |
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diff -r a9560839104d -r 1a29dd3888f6 src/luan/interp/LuanParser.java --- a/src/luan/interp/LuanParser.java Tue May 13 06:03:09 2014 +0000 +++ b/src/luan/interp/LuanParser.java Mon May 19 06:23:18 2014 +0000 @@ -327,9 +327,22 @@ RequiredMatch( "=" ); Spaces(); Expr from = RequiredExpr(); - RequiredKeyword("to"); - Expr to = RequiredExpr(); - Expr step = Keyword("step") ? RequiredExpr() : new ConstExpr(1); + Expr to; + Expr step; + if( parser.match(',') ) { + Spaces(); + to = RequiredExpr(); + if( parser.match(',') ) { + Spaces(); + step = RequiredExpr(); + } else { + step = new ConstExpr(1); + } + } else { + RequiredKeyword("to"); + to = RequiredExpr(); + step = Keyword("step") ? RequiredExpr() : new ConstExpr(1); + } addSymbol(name); // add "for" var to symbols RequiredKeyword("do"); Stmt loop = RequiredLoopBlock();