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Initial implementation of elaboration system tasks

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(IEEE1800-2017 section 20.11)
This PR allows us to use $info/$warning/$error/$fatal **at elaboration time** within a generate block.
This is very useful to stop a synthesis of a parametrized block when an
illegal combination of parameters is chosen.
This commit is contained in:
Udi Finkelstein 2019-05-03 03:10:43 +03:00
parent 98925f6c4b
commit ac10e7d96d
10 changed files with 107 additions and 5 deletions
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5
frontends/verilog/verilog_lexer.l
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@ -301,6 +301,11 @@ supply1 { return TOK_SUPPLY1; }
return TOK_ID;
}
"$"(info|warning|error|fatal) {
frontend_verilog_yylval.string = new std::string(yytext);
return TOK_ELAB_TASK;
}
"$signed" { return TOK_TO_SIGNED; }
"$unsigned" { return TOK_TO_UNSIGNED; }