Re: [Vala] Worried about the state of Genie
On 10/09/2013 06:00, Landon Blake wrote: I have some interest in making small improvements to Genie. I've been wanting to learn more Vala programming...and Genie seems like a great little language. I think this might be a cool project. (I think both Genie and Vala are important for to make Gnome programming more accessible to more programmers.) I'd obviously would need to start by looking at the Vala source code files for Genie. I'm a little confused at how Genie works. I read on the Genie web page that it compiles down to byte code like Vala, yet it is written in Vala. That makes me think it would work more like an interpreted language than a compiled one...but I could be missing something obvious. I do know a bit about parsing, and have written some fairly gnarly parsers before. Your vision of Genie is quite complex :-) Forget about what you said. This is how vala works: lexer - parser - analysis - codegen. Genie only has its own lexer and parser. It's just 3 files: - https://git.gnome.org/browse/vala/tree/vala/valagenieparser.vala - https://git.gnome.org/browse/vala/tree/vala/valageniescanner.vala - https://git.gnome.org/browse/vala/tree/vala/valagenietokentype.vala In other words, the only difference between Vala and Genie is the syntax, the semantics is the same for both Vala and Genie. The code is really really straightforward to understand. Best regards, ___ vala-list mailing list vala-list@gnome.org https://mail.gnome.org/mailman/listinfo/vala-list
Re: [Vala] Worried about the state of Genie
On Mon, 2013-09-09 at 21:00 -0700, Landon Blake wrote: I have some interest in making small improvements to Genie. I've been wanting to learn more Vala programming...and Genie seems like a great little language. I think this might be a cool project. (I think both Genie and Vala are important for to make Gnome programming more accessible to more programmers.) I'd obviously would need to start by looking at the Vala source code files for Genie. I'm a little confused at how Genie works. I read on the Genie web page that it compiles down to byte code like Vala, yet it is written in Vala. That makes me think it would work more like an interpreted language than a compiled one...but I could be missing something obvious. I'm not sure where you're looking, but that's not true. Genie is compiled by valac to C (just like Vala) which is then compiled by a C compiler into native code. Internally, Genie uses the same AST as Vala, which is why it is part of the Vala project. The AST is not what is used when executing the code— it is merely an intermediate representation which is part of the compiler. If that's what made you think bytecode, you should read the Wikipedia page on ASTs: https://en.wikipedia.org/wiki/Abstract_syntax_tree -Evan ___ vala-list mailing list vala-list@gnome.org https://mail.gnome.org/mailman/listinfo/vala-list
[Vala] [PATCH] [Genie] Add coalescing functionality to Genie
Vala Devs,
I originally attached this patch to:
https://bugzilla.gnome.org/show_bug.cgi?id=620133
Upon further review though I'm not really sure if the patch and the bug
report are related. Given that, I've decided to re-post the patch here. I
think it's still worth committing even if it doesn't solve the
aforementioned bug.
Steven N. Oliver
From f7dd5161bc35306b2ff8ad12e4d8a5e16f32c773 Mon Sep 17 00:00:00 2001
From: Steven Oliver oliver.ste...@gmail.com
Date: Mon, 9 Sep 2013 17:17:22 -0400
Subject: [PATCH] [Genie] Add coalescing function
---
vala/valagenieparser.vala| 11 +++
vala/valagenietokentype.vala | 1 +
2 files changed, 12 insertions(+)
diff --git a/vala/valagenieparser.vala b/vala/valagenieparser.vala
index f479905..ad84415 100644
--- a/vala/valagenieparser.vala
+++ b/vala/valagenieparser.vala
@@ -1520,6 +1520,17 @@ public class Vala.Genie.Parser : CodeVisitor {
return left;
}
+Expression parse_coalescing_expression () throws ParseError {
+ var begin = get_location ();
+ var left = parse_conditional_or_expression ();
+ if (accept (TokenType.OP_COALESCING)) {
+ var right = parse_coalescing_expression ();
+ return new BinaryExpression (BinaryOperator.COALESCE,
left, right, get_src (begin));
+ } else {
+ return left;
+ }
+ }
+
Expression parse_conditional_or_expression () throws ParseError {
var begin = get_location ();
var left = parse_conditional_and_expression ();
diff --git a/vala/valagenietokentype.vala b/vala/valagenietokentype.vala
index 920a96a..df78e22 100644
--- a/vala/valagenietokentype.vala
+++ b/vala/valagenietokentype.vala
@@ -107,6 +107,7 @@ public enum Vala.Genie.TokenType {
OF,
OUT,
OP_AND,
+ OP_COALESCING,
OP_DEC,
OP_EQ,
OP_GE,
--
1.8.3.1
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