+- disallow storage class specifiers in struct/union members
+- add constant folding code (optional, ast2firm already does it)
+- Refactor code, so code to handle number values (and strings?) is an own
+ module and replacable
+- Support some attributes. noreturn, unused, printf, scanf, packed would be
+ interesting candidates
+- Add columns to source positions
+- SourcePositions could be stored selectively on expressions that really need
+ them.
+- check semantic for functions declared/defined in global scope and declared
+ again in a local scope
+- print initialisation type_path for initializer errors
+
+ast2firm:
+- handle non-constant initializers
+- output source file positions for panics.
+- handle bitfield members with 0 correctly (standard says they finish the
+ current unit)
+- create asm nodes.
+
+Missing Errors:
+* label: declaration; is no valid C99 but we parse it anyway
+* check switches for double cases
+
+Missing Warnings:
+* dead assignments (int x = 5; x = bla(); -> dead assignment at x = 5;)
+* unused label
+* check switches for all enums values
+* catch the if(k = b) cases, maybe require all assignments to be in parentheses
+ (but some few exceptions like toplevel, nested assignments)
+
+Spec-Status:
+(only test datasets tried yet)
+164.gzip: works
+175.vpr: works
+176.gcc: not ok
+181.mcf: works
+186.crafty: works (~though an asm is replaced with a stub)
+253.perlbmk: not ok
+254.gap: not ok
+255.vortex: works
+256.bzip2: works
+300.twolf: works