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Parsing case-insensitive languages #26
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- grammar extended to understand `i` postfix modifier on string literals and character classes (e.g. "string"i or [a-z]i) the way PEG.js defines case-insensitive matching. - grammar also extended to support hexadecimal escape sequences in string and character classes, e.g. "\x45" is parsed as "E"
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This PR implements case-insensitive string literals and character classes both in the grammar definition (
greg.g) and parser implementation (compile.c) which is a very useful feature for parsing case-insensitive languages like SQL. The PR implements hex escape sequences in literals and classes too.ipostfix modifier on string literals and character classes (e.g."string"ior[a-z]i) the way PEG.js defines case-insensitive matching"\x45"is parsed the same as"E"in strings and classes