Don't lex floating-point number in Rust field expression

Consider this Rust tuple:

    let tuple_tuple = ((23i32, 24i32), 25i32);

Here, the value is a tuple whose first element is also a tuple.
You should be able to print this with:

    (gdb) print tuple_tuple.0.1

However, currently the Rust lexer sees "0.1" as a floating-point
number.

This patch fixes the problem by introducing a special case in the
lexer: when parsing a field expression, the parser informs the lexer
that a number should be handled as a decimal integer only.

This change then lets us remove the decimal integer special case from
lex_number.

v2: I realized that the other DECIMAL_INTEGER cases aren't needed any
more.

Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=32472

0 files changed, 0 insertions, 0 deletions