xdc: A hypothetical D cross-compiler and AST manipulation tool.

[Chad Joan]

On Saturday, 20 July 2013 at 04:38:20 UTC, cal wrote:
> On Thursday, 18 July 2013 at 03:26:10 UTC, Chad Joan wrote:
> [...]
>
> Is the input to xdc a semantically-analyzed D AST, or does 
> semantic analysis occur during pattern-matching/lowering?

The latter.

xdc would accept D code as text input (.d files) and parse it to 
produce its own AST.  Semantic analysis is then done by matching 
patterns in the AST and doing substitutions until all that's left 
are the AST nodes the backend wants.  The backend then matches 
patterns and emits the desired output (instead of substituting 
AST nodes).