bc: support void functions (GNU compat)

function                                             old     new   delta
xc_program_print                                       -     689    +689
zxc_vm_process                                       814     869     +55
zxc_program_exec                                    4098    4116     +18
zxc_program_assign                                   385     392      +7
bc_result_free                                        43      46      +3
zxc_program_binOpPrep                                243     245      +2
zdc_program_execStr                                  518     520      +2
zxc_program_print                                    683       -    -683
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 6/0 up/down: 776/-683)           Total: 93 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/testsuite/bc.tests b/testsuite/bc.tests
index 0a8222be6..3fde60a2c 100755
--- a/testsuite/bc.tests
+++ b/testsuite/bc.tests
@@ -123,6 +123,23 @@ testing "bc define with body on next line" \
         "8\n9\n" \
         "" "define w()\n{ auto z; return 8; }\nw()\n9"
 
+testing "bc void function" \
+        "bc" \
+        "void9\n" \
+        "" "define void w() {print \"void\"}\nw()\n9"
+
+# Extra POSIX compat - GNU bc does not allow this
+testing "bc function named 'void'" \
+        "bc" \
+        "void0\n9\n" \
+        "" "define void() {print \"void\"}\nvoid()\n9"
+
+# Extra POSIX compat - GNU bc does not allow this
+testing "bc variable named 'void'" \
+        "bc" \
+        "6\n9\n" \
+        "" "void=6\nvoid\n9"
+
 testing "bc if(cond)<NL>" \
         "bc" \
         "9\n" \