Token concatentation (##) in C preprocessor
#define MY_MACRO(A,B) \
instance MyClass A##B where ...
MY_MACRO(Foo,Bar)
Should expand to
instance MyClass FooBar where ...
This behavior is defined in the C standard, and is quite handy. Presently GHC leaves the '##' in the expanded text.
Trac metadata
Trac field | Value |
---|---|
Version | 6.8.3 |
Type | FeatureRequest |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | Unknown |
Architecture | Unknown |