Can now track the source file and line of all constructs.

 On branch master
 Your branch is up-to-date with 'origin/master'.

 Changes to be committed:
	modified:   scratchpad.md
	modified:   src/main.c
	modified:   src/verilog_ast.c
	modified:   src/verilog_parser_wrapper.c
	modified:   src/verilog_preprocessor.c
	modified:   src/verilog_preprocessor.h
	modified:   src/verilog_scanner.l

scratchpad.md

@@ -10,7 +10,7 @@ A file of todo-lists, notes, and other useful stuff.
 ### Features
 
 - [ ] `ast_expression_tostring()` function
-- [ ] Track source *file* of a construct, as well as line number.
+- [X] Track source *file* of a construct, as well as line number.
 - [ ] Track macro evaluations.
 - [ ] Freeing of individual memory structures, rather than all at once.
 

src/main.c

@@ -34,6 +34,8 @@ int main(int argc, char ** argv)
 
             // Load the file.
             FILE * fh = fopen(argv[F], "r");
+
+            verilog_preprocessor_set_file(yy_preproc, argv[F]);
 
             // Parse the file and store the result.
             int result = verilog_parse_file(fh);