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add attributes for enumerated values in ilang

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- information also useful for strongly-typed enums (not implemented)
- resolves enum values in ilang part of #1594
- still need to output enums to VCD (or better yet FST) files
This commit is contained in:
Jeff Wang 2020-02-03 01:12:24 -05:00 • committed by Jeff Wang
parent 6320f2692b
commit d12ba42a74
5 changed files with 79 additions and 5 deletions
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9
frontends/verilog/verilog_parser.y
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@ -1243,9 +1243,12 @@ single_defparam_decl:
};
enum_type: TOK_ENUM {
static int enum_count;
// create parent node for the enum
astbuf2 = new AstNode(AST_ENUM);
ast_stack.back()->children.push_back(astbuf2);
astbuf2->str = std::string("$enum");
astbuf2->str += std::to_string(enum_count++);
// create the template for the names
astbuf1 = new AstNode(AST_ENUM_ITEM);
astbuf1->children.push_back(AstNode::mkconst_int(0, true));
@ -1254,6 +1257,7 @@ enum_type: TOK_ENUM {
delete astbuf1;
astbuf1 = tnode;
tnode->type = AST_WIRE;
tnode->attributes["\\enum_type"] = AstNode::mkconst_str(astbuf2->str);
// drop constant but keep any range
delete tnode->children[0];
tnode->children.erase(tnode->children.begin()); }
@ -1311,7 +1315,10 @@ enum_var: TOK_ID {
}
;
enum_decl: enum_type enum_var_list ';' { delete astbuf1; }
enum_decl: enum_type enum_var_list ';' {
//enum_type creates astbuf1 for use by typedef only
delete astbuf1;
}
;
wire_decl: