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authorJohn Wiegley <johnw@newartisans.com>2009-02-21 18:49:43 -0400
committerJohn Wiegley <johnw@newartisans.com>2009-02-21 18:49:43 -0400
commit1f39d4148e588a5476e96550591131ae65ad0fe2 (patch)
tree86283fd983d6926c3f008f28e790b1d7ddee43ca /src/report.h
parent45e41b023a197151112199db893df70d21858a92 (diff)
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Create a new interactive_t helper class
The purpose of this class is much like Emacs' (interactive) form: it allows a value expression function to declare exactly how many arguments, and of what type, it intends to receive. It then offers type-safe access to theese arguments in a consistent manner. An example value expression function definition in C++: value_t fn_foo(call_scope_t& scope) { // We expect a string, an integer, and an optional date interactive_t args(scope, "sl&d"); std::cout << "String = " << args.get<string>(0) << "Integer = " << args.get<long>(1) << std::endl; if (args.has(2)) // was a date provided? std::cout << "Date = " << args.get<date_t>(2) << std::endl; return NULL_VALUE; } There is also an in_context_t<T> template, which finds the context type T in the current scope hierarchy. The in_context_t then also acts as a smart pointer to reference this context object, in addition to serving the same duty as interactive_t. This combination of intent is solely for the sake of brevity. value_t fn_bar(call_scope_t& scope) { in_context_t<account_t> env(scope, "sl&d"); std::cout << "Account name = " << env->fullname() << "String arg = " << env.get<string>(0) << std::endl; return NULL_VALUE; } As you can see here, 'env' acts as a smart pointer to the required context, and an object to extract the typed arguments.
Diffstat (limited to 'src/report.h')
-rw-r--r--src/report.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/report.h b/src/report.h
index a4020af8..f0408e89 100644
--- a/src/report.h
+++ b/src/report.h
@@ -502,13 +502,13 @@ public:
"3 + date_width + payee_width + account_width + amount_width))"
" %(print(strip(display_total), total_width, "
"4 + date_width + payee_width + account_width + amount_width "
- "+ total_width, true))\n%/"
+ "+ total_width))\n%/"
"%(print(\" \", 2 + date_width + payee_width))"
"%(print(truncate(account, account_width, abbrev_len), account_width))"
" %(print(strip(display_amount), amount_width, 3 + date_width "
"+ payee_width + account_width + amount_width))"
" %(print(strip(display_total), total_width, 4 + date_width "
- "+ payee_width + account_width + amount_width + total_width, true))\n");
+ "+ payee_width + account_width + amount_width + total_width))\n");
});
OPTION(report_t, related); // -r