[clang-tools-extra] Add clang-tidy check to suggest replacement of conditional statement with std::min/std::max (PR #77816)
Piotr Zegar via cfe-commits
cfe-commits at lists.llvm.org
Sun Jan 14 00:03:48 PST 2024
================
@@ -0,0 +1,58 @@
+// RUN: %check_clang_tidy %s readability-use-std-min-max %t
+
+constexpr int myConstexprMin(int a, int b) {
+ return a < b ? a : b;
+}
+
+constexpr int myConstexprMax(int a, int b) {
+ return a > b ? a : b;
+}
+
+int bar(int x, int y) {
+ return x < y ? x : y;
+}
+
+void foo() {
+ int value1,value2,value3;
+ short value4;
+
+ // CHECK-MESSAGES: :[[@LINE+1]]:3: warning: use `std::max` instead of `<` [readability-use-std-min-max]
+ if (value1 < value2)
+ value1 = value2; // CHECK-FIXES: value1 = std::max(value1, value2);
+
+ // CHECK-MESSAGES: :[[@LINE+1]]:3: warning: use `std::min` instead of `<` [readability-use-std-min-max]
+ if (value1 < value2)
+ value2 = value1; // CHECK-FIXES: value2 = std::min(value1, value2);
+
+ // CHECK-MESSAGES: :[[@LINE+1]]:3: warning: use `std::min` instead of `>` [readability-use-std-min-max]
+ if (value2 > value1)
+ value2 = value1; // CHECK-FIXES: value2 = std::min(value2, value1);
+
+ // CHECK-MESSAGES: :[[@LINE+1]]:3: warning: use `std::max` instead of `>` [readability-use-std-min-max
+ if (value2 > value1)
+ value1 = value2; // CHECK-FIXES: value1 = std::max(value2, value1);
+
+ // No suggestion needed here
+ if (value1 == value2)
+ value1 = value2;
+
+ // CHECK-MESSAGES: :[[@LINE+1]]:3: warning: use `std::max` instead of `<` [readability-use-std-min-max]
+ if(value1<value4)
+ value1=value4; // CHECK-FIXES: value1 = std::max(value1, value4);
+
+ // CHECK-MESSAGES: :[[@LINE+1]]:3: warning: use `std::min` instead of `<` [readability-use-std-min-max]
+ if(value1+value2<value3)
+ value3 = value1+value2; // CHECK-FIXES: value3 = std::min(value1+value2, value3);
+
+ // CHECK-MESSAGES: :[[@LINE+1]]:3: warning: use `std::max` instead of `<` [readability-use-std-min-max]
+ if (value1 < myConstexprMin(value2, value3))
+ value1 = myConstexprMin(value2, value3); // CHECK-FIXES: value1 = std::max(value1, myConstexprMin(value2, value3));
+
+ // CHECK-MESSAGES: :[[@LINE+1]]:3: warning: use `std::min` instead of `>` [readability-use-std-min-max]
+ if (value1 > myConstexprMax(value2, value3))
+ value1 = myConstexprMax(value2, value3); // CHECK-FIXES: value1 = std::min(value1, myConstexprMax(value2, value3));
+
+ // CHECK-MESSAGES: :[[@LINE+1]]:3: warning: use `std::max` instead of `<` [readability-use-std-min-max]
+ if (value1 < bar(value2, value3))
+ value1 = bar(value2, value3); // CHECK-FIXES: value1 = std::max(value1, bar(value2, value3));
+}
----------------
PiotrZSL wrote:
add tests for <= and >=
https://github.com/llvm/llvm-project/pull/77816
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