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- allow struct extensions in zscript.

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This is mainly for splitting the Doom specific content off the main definitions for easier reuse.
This commit is contained in:
Christoph Oelckers 2020-10-05 19:15:08 +02:00
commit f99ac8b28b
6 changed files with 70 additions and 25 deletions
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12
src/common/scripting/frontend/zcc-parse.lemon
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@ -234,6 +234,7 @@ class_head(X) ::= EXTEND CLASS(T) IDENTIFIER(A).
X = head;
}
class_head(X) ::= CLASS(T) IDENTIFIER(A) class_ancestry(B) class_flags(C).
{
NEW_AST_NODE(Class,head,T);
@ -394,6 +395,17 @@ struct_def(X) ::= STRUCT(T) IDENTIFIER(A) struct_flags(S) LBRACE opt_struct_body
X = def;
}
struct_def(X) ::= EXTEND STRUCT(T) IDENTIFIER(A) LBRACE opt_struct_body(B) RBRACE opt_semicolon.
{
NEW_AST_NODE(Struct,def,T);
def->NodeName = A.Name();
def->Body = B;
def->Type = nullptr;
def->Symbol = nullptr;
def->Flags = ZCC_Extension;
X = def;
}
%type struct_flags{ClassFlagsBlock}
struct_flags(X) ::= . { X.Flags = 0; X.Version = {0, 0}; }
struct_flags(X) ::= struct_flags(A) UI. { X.Flags = A.Flags | ZCC_UIFlag; }