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expr.d: metafy a bit more

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nazrin 2025-05-28 22:56:01 +00:00
parent 192b8d1c27
commit b466717c6e
1 changed files with 6 additions and 2 deletions
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8
src/expr.d
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@ -1,5 +1,6 @@
import std.conv; import std.conv;
import std.stdio; import std.stdio;
import std.meta : AliasSeq;
import taggedalgebraic; import taggedalgebraic;
@ -13,13 +14,16 @@ abstract class Expr{
R visit(Literal expr); R visit(Literal expr);
R visit(Unary expr); R visit(Unary expr);
} }
abstract string accept(Visitor!string visitor); private alias rTypes = AliasSeq!(string);
static foreach(T; rTypes)
abstract T accept(Visitor!T visitor);
private template defCtorAndAccept(){ private template defCtorAndAccept(){
this(Args...)(auto ref Args args){ this(Args...)(auto ref Args args){
static foreach(i, a; args) static foreach(i, a; args)
this.tupleof[i] = a; this.tupleof[i] = a;
} }
override string accept(Visitor!string visitor) => visitor.visit(this); static foreach(T; rTypes)
override T accept(Visitor!T visitor) => visitor.visit(this);
} }
static class Binary : Expr{ static class Binary : Expr{