Fix an issue of compile errors by Clang

Author: arithy

examples/calc.peg

@@ -43,7 +43,7 @@ _      <- [ \t]*
 EOL    <- '\n' / '\r\n' / '\r' / ';'
 
 %%
-int main() {
+int main(int argc, char **argv) {
     calc_context_t *ctx = calc_create(NULL);
     while (calc_parse(ctx, NULL));
     calc_destroy(ctx);

src/packcc.c

@@ -3228,13 +3228,24 @@ static code_reach_t generate_quantifying_code(generate_t *gen, const node_t *exp
             stream__write_characters(gen->stream, ' ', indent);
             stream__puts(gen->stream, "const size_t n0 = chunk->thunks.len;\n");
         }
-        stream__write_characters(gen->stream, ' ', indent);
-        stream__puts(gen->stream, "int i;\n");
-        stream__write_characters(gen->stream, ' ', indent);
-        if (max < 0)
-            stream__puts(gen->stream, "for (i = 0;; i++) {\n");
-        else
+        if (max < 0) {
+            if (min > 0) {
+                stream__write_characters(gen->stream, ' ', indent);
+                stream__puts(gen->stream, "int i;\n");
+                stream__write_characters(gen->stream, ' ', indent);
+                stream__puts(gen->stream, "for (i = 0;; i++) {\n");
+            }
+            else {
+                stream__write_characters(gen->stream, ' ', indent);
+                stream__puts(gen->stream, "for (;;) {\n");
+            }
+        }
+        else {
+            stream__write_characters(gen->stream, ' ', indent);
+            stream__puts(gen->stream, "int i;\n");
+            stream__write_characters(gen->stream, ' ', indent);
             stream__printf(gen->stream, "for (i = 0; i < %d; i++) {\n", max);
+        }
         stream__write_characters(gen->stream, ' ', indent + 4);
         stream__puts(gen->stream, "const size_t p = ctx->cur;\n");
         stream__write_characters(gen->stream, ' ', indent + 4);

tests/code_generation.d/generation.bats

@@ -7,12 +7,7 @@ load "$TESTDIR/utils.sh"
 }
 
 @test "Testing code_generation.d - compilation" {
-    test_compile \
-        -D pcc_create=my_create \
-        -D pcc_destroy=my_destroy \
-        -D pcc_parse=my_parse \
-        -D pcc_context_t=my_context_t \
-        -D RET_TYPE=double
+    ${CC:-cc} -I "$BATS_TEST_DIRNAME" "$BATS_TEST_DIRNAME/parser.c" "$BATS_TEST_DIRNAME/main.c" -o "$BATS_TEST_DIRNAME/parser" "$@"
 }
 
 @test "Testing code_generation.d - earlyheader" {

tests/code_generation.d/input.peg

@@ -1,7 +1,7 @@
 %header { /* HEADER ONLY */ }
 
 %source {
-    int custom_function() {
+    int custom_function(void) {
         return 42;
     }
 }

tests/code_generation.d/main.c

@@ -0,0 +1,9 @@
+#include "parser.h"
+
+int main(int argc, char **argv) {
+    double ret;
+    my_context_t *ctx = my_create(0);
+    while (my_parse(ctx, &ret));
+    my_destroy(ctx);
+    return 0;
+}