AS3Parser - proposed new syntax

[hydroper]

I've really covered a lot of cases in AS3Parser, fixed a lot of bugs as I could see in demo (mostly related to error recovery), and introduced both CONFIG::X { ... } (parses inner with same parent directive context) and a multiple branching configuration { ... } directive (if-else).

configuration {
    if (FOO::EXAMPLE=bar) {
        /* Action */
    } else if (ANOTHER_CONST) {
        /* Action */
    } else {
        /* Action */
    }
}

Demo

It would be nice if Apache Royale takes into consideration the syntactic features introduced in AS3Parser.

New Syntax

Processing Deviations

In short, I try to introduce solely syntactic features that conform to ECMAScript 4 and Java dialects. The only processing deviation is the include directive which does not concatenate text, but contributes syntactic nodes instead, maintaining lines and columns.

[hydroper]

I've done a few definitive changes so far.

Function bodies

• Function bodies consisting of an expression: an expression is consumed only if one of the following conditions are met:
  • The offending token is inline.
  • The offending token of the expression is in a line whose indentation is higher than that of the previous token.
  • The offending token of the expression is (.

This is to avoid issues with expressions not belonging to the body of a native or abstract method.

Removed Syntax

I have removed the new embed { ... } expression as it is inconsistent with the Embed meta-data, and it is not very useful in practice, I realize it myself.

Parser Updates

I've finished a CSS parser (I'm backwards to Royale in terms of function calls such as {x}-gradient(...), but I believe it's straightforward to support their syntax).

I've made the diagnostics very flexible as well, taking arbitrary arguments without much cumbersome in Rust (diagarg![...] macro), and approximated them more to Flex messages.

There have been a number of improvements, error recovery reinforcements, bug fixes, interface changes, name changes. A lot of refactoring and lots of weird things have gone off.

v1.0.0 released.

Also, if you want a Rust introduction, I've wrote a detailed quickstart at the wiki.