summaryrefslogtreecommitdiffstatshomepage
path: root/src/lib/netlist/plib/pfunction.cpp
diff options
context:
space:
mode:
author Vas Crabb <vas@vastheman.com>2017-03-30 15:23:23 +1100
committer Vas Crabb <vas@vastheman.com>2017-03-30 15:51:14 +1100
commit5e8fefbb1214e9936253a81da4946cc42cc20b9d (patch)
tree30d297c7eb05c68326488bf1618505a8d00bd135 /src/lib/netlist/plib/pfunction.cpp
parent35b673ea45da6b4759f170813f99c124c7db9d70 (diff)
Turn psring iterator into a real forward iterator that works with standard algorithms.
There are a few changes to achieve this: * Rename to const_iterator since it's immutable * Typedef iterator to const_iterator for now as there's no mutable iterator * Add default constrcutor and operator-> required by concept, const-qualify operators * Remove operator+ and operator+= since it's not a random-access iterator (use std::next and std::advance instead) * Return reference/pointer to a proxy rather than a code_t value from opertator*/operator-> The final change is required to meet the requirement that operator* for two equivalent forward iterators return an equivalent reference. The pstring doesn't actually contain a sequence of code_t, so there's no way to return a reference to code_t directly. Instead, a reference to a proxy object aliased on the string storage is returned. The proxy is implicitly convertible to code_t. The most noticeable side effect is that auto c = *s.begin() or for (auto c : s) won't work. You need to do for (auto &c : s) or for (code_t c : s) instead.
Diffstat (limited to 'src/lib/netlist/plib/pfunction.cpp')
-rw-r--r--src/lib/netlist/plib/pfunction.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/lib/netlist/plib/pfunction.cpp b/src/lib/netlist/plib/pfunction.cpp
index 0f48860d15b..7113a6e07fb 100644
--- a/src/lib/netlist/plib/pfunction.cpp
+++ b/src/lib/netlist/plib/pfunction.cpp
@@ -86,7 +86,7 @@ static int get_prio(pstring v)
{
if (v == "(" || v == ")")
return 1;
- else if (v.left(v.begin()+1) >= "a" && v.left(v.begin()+1) <= "z")
+ else if (v.left(std::next(v.begin(),1)) >= "a" && v.left(std::next(v.begin(),1)) <= "z")
return 0;
else if (v == "*" || v == "/")
return 20;