feat: add \U style 8-hex-digit unicode escape support in string literals

Extend the compiler's string parser to handle `\U` escapes with 8 hex digits
for codepoints above U+FFFF, replacing the previous TODO comment. The
`readUnicodeEscape` helper now accepts a variable digit count (4 or 8) and
the `readString` function dispatches `\u` with length 4 and `\U` with length 8.
New test cases verify correct encoding of emoji and ancient scripts, plus
error handling for incomplete long escapes and values that fit in 4 digits.

This commit is contained in:

Will Speak

2015-10-03 16:28:25 +00:00

parent 0f932e1f3a

commit 645296cbd8

4 changed files with 17 additions and 6 deletions

test/language/string/incomplete_long_unicode_escape.wren

View File

@@ -0,0 +1,2 @@
 // expect error line 2
 "\U01F603"