Identifiers with ' (single quotes) parse but generate illegal C

[gstew5]

The following code:

fun foo'(x : int) { return x }
let comp main = read[int] >>> map foo' >>> write[int]

generates illegal C (C identifiers cannot contain single quote), causing gcc warnings and errors:

gcc -std=c99 -msse3 -I . -c test.c -o test.o
test.c:26:10: warning: missing terminating ' character [enabled by default]
 int32 foo'_ln1_1(int32 x2);
          ^
...

Two potential fixes:

• Catch single-quote ids at parse-time (by making them illegal), or
• Choose related (fresh) names for these identifiers before code generation.

[ghost]

Possible duplicate: https://github.com/dimitriv/Ziria/issues/80

[gstew5]

Closed as duplicate of #80