On 2013-07-17 16:13, Ary Borenszweig wrote:
Since Descent used a port of the D compiler to Java, I think the same can be done by tweaking dmd. You have the generated AST after semantic analysis and you can easily output that. But of course you need to be able to convert the AST to string with correct indentation.In general, I think a compiler should *really* care about setting line and column numbers to AST nodes and assisting the user as much as possible, like providing a way to output the final representation of the program as a String. For example compiling this program with D: --- string foo() { return "void bar() {\n return 1 + 2\n}"; } void main() { mixin(foo()); } --- gives this error: foo.d(7): Error: expression expected, not ')' foo.d(8): Error: found '}' when expecting ';' following statement foo.d(8): Error: found 'EOF' when expecting '}' following compound statement foo.d(7): Error: + has no effect in expression (1 + 2 + 0) Can you see where is the error? I'll show here some ideas which D can use, which we have implemented in Crystal. [Snip]
That's how error messages should look like :) -- /Jacob Carlborg
