change handling of standard input

For `-f /dev/stdin`, the `pathname` of the parsing context will be empty
as for any other streamed input.

`instance_t::include_directive` did not work as expected for `-f /dev/stdin`
and relative file names. One would expect them to be relative to the current
directory rather than `/dev`.

This will lead to `While parsing file ""` messages. This could be
adjusted to read `While parsing standard input`, but maybe it's not
worth the special cases.

This commit also fixes bug 788: behaviour of source_context for '-f -'

1 files changed, 12 insertions, 0 deletions

diff --git a/test/regress/BF3C1F82-2.test b/test/regress/BF3C1F82-2.test
new file mode 100644
index 00000000..453151ce
--- /dev/null
+++ b/test/regress/BF3C1F82-2.test
@@ -0,0 +1,12 @@
+; Check that include directives are relative for "-f /dev/stdin"
+include non-existent-ledger-file-BF3C1F82
+test -f - reg -> 1
+__ERROR__
+While parsing file "", line 2: 
+Error: File to include was not found: "./non-existent-ledger-file-BF3C1F82"
+end test
+test -f /dev/stdin reg -> 1
+__ERROR__
+While parsing file "", line 2: 
+Error: File to include was not found: "./non-existent-ledger-file-BF3C1F82"
+end test