SYNOPSIS

Compile it with:

eyapp -b '' Tieins.eyp

Run it with:

./Tieins.pm -t -f inputforsemanticinfo.txt

try also:

./Tieins.pm -t -f inputforsemanticinfo2.txt

THIS EXAMPLE

In this "Calc"-like example we have a language with a special construct hex (hex-expr). After the keyword hex comes an expression in parentheses in which all integers are hexadecimal. In particular, strings in /[A-F0-9]+/ like A1B must be treated as an hex integer unless they were previously declared.

SEE ALSO

• File SemanticInfoInTokens.eyp

• http://www.gnu.org/software/bison/manual/html_mono/bison.html#Lexical-Tie_002dins

• http://en.wikipedia.org/wiki/The_lexer_hack

• http://eli.thegreenplace.net/2007/11/24/the-context-sensitivity-of-cs-grammar/