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Issue #2142 - Add predicate functions count_if and any_of to ListNode iterator

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Martok 2023-04-26 17:32:55 +02:00 • committed by roytam1
commit 3b9b111b2f
1 changed files with 22 additions and 0 deletions
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22
js/src/frontend/ParseNode.h
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@ -6,6 +6,8 @@
#ifndef frontend_ParseNode_h #ifndef frontend_ParseNode_h
#define frontend_ParseNode_h #define frontend_ParseNode_h
#include <functional>
#include "mozilla/Attributes.h" #include "mozilla/Attributes.h"
#include "builtin/ModuleObject.h" #include "builtin/ModuleObject.h"
@ -1420,6 +1422,8 @@ class ListNode : public ParseNode
} }
}; };
typedef std::function<bool(ParseNode*)> predicate_fun;
#ifdef DEBUG #ifdef DEBUG
MOZ_MUST_USE bool contains(ParseNode* target) const { MOZ_MUST_USE bool contains(ParseNode* target) const {
MOZ_ASSERT(target); MOZ_ASSERT(target);
@ -1460,6 +1464,24 @@ class ListNode : public ParseNode
MOZ_ASSERT_IF(end, contains(end)); MOZ_ASSERT_IF(end, contains(end));
return range(head(), end); return range(head(), end);
} }
// Predicate functions, like their counterparts in C++17
size_t count_if(predicate_fun predicate) const {
size_t count = 0;
for (ParseNode* node = head(); node; node = node->pn_next) {
if (predicate(node))
count++;
}
return count;
}
bool any_of(predicate_fun predicate) const {
for (ParseNode* node = head(); node; node = node->pn_next) {
if (predicate(node))
return true;
}
return false;
}
}; };
inline bool inline bool