Give backtraces for diagnostics from macros and include files.

Partly this means that dmnsn_diagnostic() can't be called anywhere except
during parsing, because the dmnsn_parse_location::parent pointers dangle.

1 files changed, 8 insertions, 0 deletions

diff --git a/dimension/common.rules b/dimension/common.rules
index d77ab1a..157edca 100644
--- a/dimension/common.rules
+++ b/dimension/common.rules
@@ -477,6 +477,14 @@ FLOAT: ARITH_EXPR {
      }
 ;
 
+INT: FLOAT {
+     $$ = $1;
+     if ($$.type == DMNSN_AST_FLOAT) {
+       dmnsn_diagnostic(@$, "WARNING: float rounded to integer");
+     }
+   }
+;
+
 FLOAT_LITERAL: "integer" {
                $$ = dmnsn_new_astnode(DMNSN_AST_INTEGER, @$);
                $$.ptr = dmnsn_malloc(sizeof(long));