diff options
| author | Boris Kolpackov <boris@codesynthesis.com> | 2019-09-27 13:55:07 +0200 |
|---|---|---|
| committer | Boris Kolpackov <boris@codesynthesis.com> | 2019-09-30 15:30:45 +0200 |
| commit | 12268f7741ba73c75a73fafb6063f1393e485aae (patch) | |
| tree | c80fe4918c18702f6cb199c9016366338f8f5061 /libbuild2/lexer.cxx | |
| parent | e59c2bc979293d8cdea3f9733ecd59c080fce63c (diff) | |
Add support for custom match/extract functions in switch expression
Diffstat (limited to 'libbuild2/lexer.cxx')
| -rw-r--r-- | libbuild2/lexer.cxx | 34 |
1 files changed, 29 insertions, 5 deletions
diff --git a/libbuild2/lexer.cxx b/libbuild2/lexer.cxx index ac62996..17b0c7d 100644 --- a/libbuild2/lexer.cxx +++ b/libbuild2/lexer.cxx @@ -55,6 +55,12 @@ namespace build2 s2 = " "; break; } + case lexer_mode::switch_expressions: + { + s1 = " $(){}[],:#\t\n"; + s2 = " "; + break; + } case lexer_mode::case_patterns: { s1 = " $(){}[],|#\t\n"; @@ -119,6 +125,7 @@ namespace build2 case lexer_mode::normal: case lexer_mode::value: case lexer_mode::values: + case lexer_mode::switch_expressions: case lexer_mode::case_patterns: case lexer_mode::attribute: case lexer_mode::variable: @@ -157,8 +164,9 @@ namespace build2 { // Expire value/values modes at the end of the line. // - if (m == lexer_mode::value || - m == lexer_mode::values || + if (m == lexer_mode::value || + m == lexer_mode::values || + m == lexer_mode::switch_expressions || m == lexer_mode::case_patterns) state_.pop (); @@ -190,6 +198,22 @@ namespace build2 } } + // The following characters are special in the normal, variable, and + // switch_expressions modes. + // + if (m == lexer_mode::normal || + m == lexer_mode::variable || + m == lexer_mode::switch_expressions) + { + switch (c) + { + // NOTE: remember to update mode(), next_eval() if adding new special + // characters. + // + case ':': return make_token (type::colon); + } + } + // The following characters are special in the normal and variable modes. // if (m == lexer_mode::normal || m == lexer_mode::variable) @@ -199,7 +223,6 @@ namespace build2 // NOTE: remember to update mode(), next_eval() if adding new special // characters. // - case ':': return make_token (type::colon); case '=': { if (peek () == '+') @@ -236,8 +259,9 @@ namespace build2 // The following characters are special in the values and buildspec mode. // - if (m == lexer_mode::buildspec || - m == lexer_mode::values || + if (m == lexer_mode::buildspec || + m == lexer_mode::values || + m == lexer_mode::switch_expressions || m == lexer_mode::case_patterns) { // NOTE: remember to update mode() if adding new special characters. |