(flex.info.gz) Options for Specifying Filenames
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(flex.info.gz) Scanner Options
(flex.info.gz) Scanner Options
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16.1 Options for Specifying Filenames
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`--header-file=FILE, `%option header-file="FILE"''
instructs flex to write a C header to `FILE'. This file contains
function prototypes, extern variables, and types used by the
scanner. Only the external API is exported by the header file.
Many macros that are usable from within scanner actions are not
exported to the header file. This is due to namespace problems and
the goal of a clean external API.
While in the header, the macro `yyIN_HEADER' is defined, where `yy'
is substituted with the appropriate prefix.
The `--header-file' option is not compatible with the `--c++'
option, since the C++ scanner provides its own header in
`yyFlexLexer.h'.
`-oFILE, --outfile=FILE, `%option outfile="FILE"''
directs flex to write the scanner to the file `FILE' instead of
`lex.yy.c'. If you combine `--outfile' with the `--stdout' option,
then the scanner is written to `stdout' but its `#line' directives
(see the `-l' option above) refer to the file `FILE'.
`-t, --stdout, `%option stdout''
instructs `flex' to write the scanner it generates to standard
output instead of `lex.yy.c'.
`-SFILE, --skel=FILE'
overrides the default skeleton file from which `flex' constructs
its scanners. You'll never need this option unless you are doing
`flex' maintenance or development.
`--tables-file=FILE'
Write serialized scanner dfa tables to FILE. The generated scanner
will not contain the tables, and requires them to be loaded at
runtime. serialization.
`--tables-verify'
This option is for flex development. We document it here in case
you stumble upon it by accident or in case you suspect some
inconsistency in the serialized tables. Flex will serialize the
scanner dfa tables but will also generate the in-code tables as it
normally does. At runtime, the scanner will verify that the
serialized tables match the in-code tables, instead of loading
them.
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