Remove '@' from the operator character set, but add the math, symbol, punctuation, arrow, and line- and box-drawing characters. Also allow operators to contain (but not start with) combining characters--this should be safe, because identifiers can't start with combining characters either, and we don't allow them anywhere else.
Swift SVN r5019
Extend the character set for identifiers according to WG14 N1518, which recommends an extended character set for identifier start and continuation characters in C. Mangle identifiers containing non-ASCII characters by borrowing the Punycode encoding used for international domain names.
No Unicode operators just yet.
Swift SVN r4968
Tweak the mangling rules to fix some collisions I found:
- Mangle variadic tuples with a lowercase 't' to distinguish them from nonvariadic tuples with a slice as their final element.
- Mangle the fixity of operators using 'op' for prefix, 'oP' for postfix, and 'oi' for infix, so that operator declarations that differ only in fixity can coexist.
While we're here, 'Slice' seems worthy of a standard substitution, so mangle it to 'Sa'.
This fixes <rdar://problem/13757744> and <rdar://problem/13757750>.
Swift SVN r4965
Sever the last load-bearing link between SILFunction and SILConstant by naming SILFunctions with their mangled symbol names. Move the core of the mangler up to SIL, and teach SILGen how to use it to mangle a SILConstant.
Swift SVN r4964
