lexer, parser: add tokens and nodes for built-in functions#48
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lexer, parser: add tokens and nodes for built-in functions#48gabrielhnf wants to merge 1 commit into
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Adds lexer tokens and parser AST support for awk built-in functions
POSIX builtins (length, substr, split, sub, gsub, match, index, sprintf, toupper, tolower, close, fflush, system, int, sqrt, exp, log, sin, cos, atan2, rand, srand) are added as plain keywords.
gawk extensions (gensub, patsplit, strtonum, systime, mktime, strftime, typeof, isarray, asort, asorti, and, or, xor, compl, lshift, rshift) fall back to identifiers in POSIX strict mode via parse_non_posix_keyword.