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added exprSize in the Haskell binding

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This commit is contained in:
Krasimir Angelov
2017-09-05 09:50:29 +02:00
parent a5fe5b9378
commit 85cf2d9f5a
4 changed files with 47 additions and 2 deletions
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33
src/runtime/c/pgf/expr.c
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@@ -1177,6 +1177,39 @@ pgf_expr_hash(GuHash h, PgfExpr e)
return h;
}
PGF_API size_t
pgf_expr_size(PgfExpr expr)
{
GuVariantInfo ei = gu_variant_open(expr);
switch (ei.tag) {
case PGF_EXPR_ABS: {
PgfExprAbs* abs = ei.data;
return pgf_expr_size(abs->body);
}
case PGF_EXPR_APP: {
PgfExprApp* app = ei.data;
return pgf_expr_size(app->fun) + pgf_expr_size(app->arg);
}
case PGF_EXPR_LIT:
case PGF_EXPR_META:
case PGF_EXPR_FUN:
case PGF_EXPR_VAR: {
return 1;
}
case PGF_EXPR_TYPED: {
PgfExprTyped* typed = ei.data;
return pgf_expr_size(typed->expr);
}
case PGF_EXPR_IMPL_ARG: {
PgfExprImplArg* impl = ei.data;
return pgf_expr_size(impl->expr);
}
default:
gu_impossible();
return 0;
}
}
PGF_API void
pgf_print_cid(PgfCId id,
GuOut* out, GuExn* err)