diff options
Diffstat (limited to 'libbuild2/lexer.hxx')
| -rw-r--r-- | libbuild2/lexer.hxx | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/libbuild2/lexer.hxx b/libbuild2/lexer.hxx index 6dc5027..8dd58c8 100644 --- a/libbuild2/lexer.hxx +++ b/libbuild2/lexer.hxx @@ -43,13 +43,22 @@ namespace build2 // split words separated by the pair character (to disable pairs one can // pass `\0` as a pair character). // - // The normal mode recognizes `%` at the beginning of the line as special. - // The cmdvar mode is like normal but does not treat `%` as special. + // The normal mode recognizes `%` and `{{...` at the beginning of the line + // as special. The cmdvar mode is like normal but does not treat these + // character sequences as special. + // + // Finally, the foreign mode reads everything until encountering a line that + // contains nothing (besides whitespaces) other than the closing multi- + // curly-brace (`}}...`) (or eos) returning the contents as the word token + // followed by the multi_rcbrace (or eos). In a way it is similar to the + // single-quote mode. The number of closing braces to expect is passed as + // mode data. // // The alternative modes must be set manually. The value/values and derived // modes automatically expires after the end of the line. The attribute mode // expires after the closing `]`. The variable mode expires after the word - // token. And the eval mode expires after the closing `)`. + // token. The eval mode expires after the closing `)`. And the foreign mode + // expires after the closing braces. // // Note that normally it is only safe to switch mode when the current token // is not quoted (or, more generally, when you are not in the double-quoted @@ -85,6 +94,7 @@ namespace build2 eval, single_quoted, double_quoted, + foreign, buildspec, value_next @@ -163,8 +173,10 @@ namespace build2 protected: struct state { - lexer_mode mode; - uintptr_t data; + lexer_mode mode; + uintptr_t data; + optional<token> hold; + bool attributes; char sep_pair; @@ -190,6 +202,9 @@ namespace build2 token next_quoted (); + token + next_foreign (); + // Lex a word assuming current is the top state (which may already have // been "expired" from the top). // |