--- /dev/null
+# RUN: yaml2obj -E -Dfoo=wibble %s | FileCheck %s
+
+This is a test of yaml2obj's pure preprocessing mode, so it doesn't
+have to contain valid YAML, or any YAML at all. But we do have to be
+careful with the FileCheck CHECK directives, because they'll be
+emitted into the preprocessed output, and risk matching themselves!
+For that reason, each one matches only at the start of a line.
+
+Expand a macro:
+[[foo]] # CHECK: {{^wibble}}
+
+Expand an undefined macro:
+[[bar]] # CHECK: {{^\[\[bar\]\]}}
+
+Expand an undefined macro where we provided a default value:
+[[baz=123]] # CHECK: {{^123}}
"definition. The syntax is <macro>=<definition>"),
cl::cat(Cat));
+cl::opt<bool> PreprocessOnly("E", cl::desc("Just print the preprocessed file"),
+ cl::cat(Cat));
+
cl::opt<unsigned>
DocNum("docnum", cl::init(1),
cl::desc("Read specified document from input (default = 1)"),
Optional<std::string> Buffer = preprocess(Buf.get()->getBuffer(), ErrHandler);
if (!Buffer)
return 1;
- yaml::Input YIn(*Buffer);
- if (!convertYAML(YIn, Out->os(), ErrHandler, DocNum,
- MaxSize == 0 ? UINT64_MAX : MaxSize))
- return 1;
+ if (PreprocessOnly) {
+ Out->os() << Buffer;
+ } else {
+ yaml::Input YIn(*Buffer);
+
+ if (!convertYAML(YIn, Out->os(), ErrHandler, DocNum,
+ MaxSize == 0 ? UINT64_MAX : MaxSize))
+ return 1;
+ }
Out->keep();
Out->os().flush();