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lemon left-hand-side optimizations

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This commit is contained in:
Kelvin Sherlock 2016-08-05 10:34:05 -04:00
parent 5b343cc7dd
commit 9d5d3ca9e8
1 changed files with 14 additions and 21 deletions
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35
phase2-parser.lemon
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@ -69,13 +69,10 @@ command_list ::= command_list command(C) sep . {
compound_list ::= .
compound_list(RV) ::= compound_list(L) sep. {
RV = std::move(L);
}
compound_list(L) ::= compound_list(L) sep.
compound_list(RV) ::= compound_list(L) command(C) sep . {
RV = std::move(L);
if (C) RV.emplace_back(std::move(C));
compound_list(L) ::= compound_list(L) command(C) sep . {
if (C) L.emplace_back(std::move(C));
}
@ -99,17 +96,17 @@ command(RV) ::= command(L) PIPE opt_nl command(R). {
RV = std::make_unique<pipe_command>(std::move(L), std::move(R));
}
command(RV) ::= term(T). { RV = std::move(T); }
command(C) ::= term(C).
term(RV) ::= COMMAND(C). { RV = std::make_unique<simple_command>(std::move(C)); }
term(RV) ::= EVALUATE(C). { RV = std::make_unique<evaluate_command>(std::move(C)); }
term(RV) ::= BREAK(C). { RV = std::make_unique<break_command>(std::move(C)); }
term(RV) ::= CONTINUE(C). { RV = std::make_unique<continue_command>(std::move(C)); }
term(RV) ::= if_command(C). { RV = std::move(C); }
term(RV) ::= begin_command(C). { RV = std::move(C); }
term(RV) ::= paren_command(C). { RV = std::move(C); }
term(RV) ::= loop_command(C). { RV = std::move(C); }
term(RV) ::= for_command(C). { RV = std::move(C); }
term(C) ::= if_command(C).
term(C) ::= begin_command(C).
term(C) ::= paren_command(C).
term(C) ::= loop_command(C).
term(C) ::= for_command(C).
/* lexer error (mismatched quotes, etc) */
@ -140,13 +137,10 @@ term(RV) ::= FOR error END.
/* compound list ends with a separator. paren command does not need the final separator */
%type paren_list { command_ptr_vector }
paren_list(RV) ::= compound_list(L) . {
RV = std::move(L);
}
paren_list(L) ::= compound_list(L) .
paren_list(RV) ::= compound_list(L) command(C) . {
RV = std::move(L);
RV.emplace_back(std::move(C));
paren_list(L) ::= compound_list(L) command(C) . {
L.emplace_back(std::move(C));
}
paren_command(RV) ::= LPAREN(T) paren_list(L) RPAREN(E). {
@ -197,9 +191,8 @@ else_command(RV) ::= else(E) sep compound_list(L). {
}
else_command(RV) ::= else_command(EC) else(E) sep compound_list(L). {
RV = std::move(EC);
RV.emplace_back(std::make_unique<if_else_clause>(@E, std::move(L), std::move(E)));
else_command(EC) ::= else_command(EC) else(E) sep compound_list(L). {
EC.emplace_back(std::make_unique<if_else_clause>(@E, std::move(L), std::move(E)));
}