diff options
Diffstat (limited to 'libbuild2/test/script/parser.cxx')
| -rw-r--r-- | libbuild2/test/script/parser.cxx | 157 |
1 files changed, 108 insertions, 49 deletions
diff --git a/libbuild2/test/script/parser.cxx b/libbuild2/test/script/parser.cxx index a99f80a..0ba5a79 100644 --- a/libbuild2/test/script/parser.cxx +++ b/libbuild2/test/script/parser.cxx @@ -311,9 +311,10 @@ namespace build2 // enter: next token is peeked at (type in tt) // leave: newline - assert (!fct || - *fct == line_type::cmd_if || - *fct == line_type::cmd_while); + assert (!fct || + *fct == line_type::cmd_if || + *fct == line_type::cmd_while || + *fct == line_type::cmd_for); // Note: token is only peeked at. // @@ -373,6 +374,7 @@ namespace build2 if (n == "if") lt = line_type::cmd_if; else if (n == "if!") lt = line_type::cmd_ifn; else if (n == "while") lt = line_type::cmd_while; + else if (n == "for") lt = line_type::cmd_for; } break; @@ -414,16 +416,70 @@ namespace build2 mode (lexer_mode::variable_line); parse_variable_line (t, tt); + // Note that the semicolon token is only required during + // pre-parsing to decide which line list the current line should + // go to and provides no additional semantics during the + // execution. Moreover, build2::script::parser::exec_lines() + // doesn't expect this token to be present. Thus, we just drop + // this token from the saved tokens. + // semi = (tt == type::semi); - if (tt == type::semi) + if (semi) + { + replay_pop (); next (t, tt); + } if (tt != type::newline) fail (t) << "expected newline instead of " << t; break; } + case line_type::cmd_for: + { + // First take care of the variable name. There is no reason not to + // support variable attributes. + // + mode (lexer_mode::normal); + + next_with_attributes (t, tt); + attributes_push (t, tt); + + if (tt != type::word || t.qtype != quote_type::unquoted) + fail (t) << "expected variable name instead of " << t; + + string& n (t.value); + + if (special_variable (n)) + fail (t) << "attempt to set '" << n << "' variable directly"; + + ln.var = &script_->var_pool.insert (move (n)); + + next (t, tt); + + if (tt != type::colon) + { + // @@ TMP We will need to fallback to parsing the 'for x <...' + // form instead. + // + fail (t) << "expected ':' instead of " << t + << " after variable name"; + } + + expire_mode (); // Expire the normal lexer mode. + + // Parse the value similar to the var line type (see above), + // except for the fact that we don't expect a trailing semicolon. + // + mode (lexer_mode::variable_line); + parse_variable_line (t, tt); + + if (tt != type::newline) + fail (t) << "expected newline instead of " << t << " after for"; + + break; + } case line_type::cmd_elif: case line_type::cmd_elifn: case line_type::cmd_else: @@ -480,7 +536,8 @@ namespace build2 case type::semi: { semi = true; - next (t, tt); // Get newline. + replay_pop (); // See above for the reasoning. + next (t, tt); // Get newline. break; } } @@ -506,18 +563,29 @@ namespace build2 ln.tokens = replay_data (); ls->push_back (move (ln)); - if (lt == line_type::cmd_if || lt == line_type::cmd_ifn) + switch (lt) { - semi = pre_parse_if_else (t, tt, d, *ls); + case line_type::cmd_if: + case line_type::cmd_ifn: + { + semi = pre_parse_if_else (t, tt, d, *ls); - // If this turned out to be scope-if, then ls is empty, semi is - // false, and none of the below logic applies. - // - if (ls->empty ()) - return semi; + // If this turned out to be scope-if, then ls is empty, semi is + // false, and none of the below logic applies. + // + if (ls->empty ()) + return semi; + + break; + } + case line_type::cmd_while: + case line_type::cmd_for: + { + semi = pre_parse_loop (t, tt, lt, d, *ls); + break; + } + default: break; } - else if (lt == line_type::cmd_while) - semi = pre_parse_while (t, tt, d, *ls); // Unless we were told where to put it, decide where it actually goes. // @@ -540,6 +608,7 @@ namespace build2 case line_type::cmd_if: case line_type::cmd_ifn: case line_type::cmd_while: + case line_type::cmd_for: { // See if this is a variable-only flow control construct. // @@ -896,8 +965,9 @@ namespace build2 break; } case line_type::cmd_while: + case line_type::cmd_for: { - fct = line_type::cmd_while; + fct = bt; break; } default: assert(false); @@ -990,13 +1060,16 @@ namespace build2 } bool parser:: - pre_parse_while (token& t, type& tt, - optional<description>& d, - lines& ls) + pre_parse_loop (token& t, type& tt, + line_type lt, + optional<description>& d, + lines& ls) { // enter: <newline> (previous line) // leave: <newline> + assert (lt == line_type::cmd_while || lt == line_type::cmd_for); + tt = peek (lexer_mode::first_token); // Parse lines until we see closing 'end'. @@ -1005,8 +1078,7 @@ namespace build2 { size_t i (ls.size ()); - bool semi ( - pre_parse_block_line (t, tt, line_type::cmd_while, d, ls)); + bool semi (pre_parse_block_line (t, tt, lt, d, ls)); if (ls[i].type == line_type::cmd_end) return semi; @@ -1359,11 +1431,8 @@ namespace build2 pair<command_expr, here_docs> p ( parse_command_expr (t, tt, lexer::redirect_aliases)); - switch (tt) - { - case type::colon: parse_trailing_description (t, tt); break; - case type::semi: next (t, tt); break; // Get newline. - } + if (tt == type::colon) + parse_trailing_description (t, tt); assert (tt == type::newline); @@ -1480,30 +1549,19 @@ namespace build2 // Note that we rely on "small function object" optimization for the // exec_*() lambdas. // - auto exec_set = [this] (const variable& var, - token& t, build2::script::token_type& tt, - const location&) + auto exec_assign = [this] (const variable& var, + value&& val, + type kind, + const location& l) { - next (t, tt); - type kind (tt); // Assignment kind. - - // We cannot reuse the value mode (see above for details). - // - mode (lexer_mode::variable_line); - value rhs (parse_variable_line (t, tt)); - - if (tt == type::semi) - next (t, tt); - - assert (tt == type::newline); - - // Assign. - // value& lhs (kind == type::assign ? scope_->assign (var) : scope_->append (var)); - apply_value_attributes (&var, lhs, move (rhs), kind); + if (kind == type::assign) + lhs = move (val); + else + append_value (&var, lhs, move (val), l); if (script_->test_command_var (var.name)) scope_->reset_special (); @@ -1550,16 +1608,17 @@ namespace build2 ct = command_type::test; exec_lines (t->tests_.begin (), t->tests_.end (), - exec_set, exec_cmd, exec_cond, + exec_assign, exec_cmd, exec_cond, nullptr /* iteration_index */, li); } else if (group* g = dynamic_cast<group*> (scope_)) { ct = command_type::setup; - bool exec_scope (exec_lines (g->setup_.begin (), g->setup_.end (), - exec_set, exec_cmd, exec_cond, - nullptr /* iteration_index */, li)); + bool exec_scope ( + exec_lines (g->setup_.begin (), g->setup_.end (), + exec_assign, exec_cmd, exec_cond, + nullptr /* iteration_index */, li)); if (exec_scope) { @@ -1729,7 +1788,7 @@ namespace build2 ct = command_type::teardown; exec_lines (g->tdown_.begin (), g->tdown_.end (), - exec_set, exec_cmd, exec_cond, + exec_assign, exec_cmd, exec_cond, nullptr /* iteration_index */, li); } else |