aoc_lib: add helper function to read lines into a vector

Author: yut23

2023/src/day23.hpp

@@ -63,7 +63,9 @@ class TrailMap {
 
   public:
     explicit TrailMap(const std::vector<std::string> &grid_);
-    static TrailMap read(std::istream &);
+    static TrailMap read(std::istream &is) {
+        return TrailMap{aoc::read_lines(is)};
+    }
     int part_1() const;
     int part_2() const;
 };
@@ -82,15 +84,6 @@ TrailMap::Key TrailMap::pos_to_key(const Pos &pos) {
 
 Pos TrailMap::key_to_pos(const Key key) const { return key_positions[key]; }
 
-TrailMap TrailMap::read(std::istream &is) {
-    std::vector<std::string> grid;
-    std::string line;
-    while (std::getline(is, line)) {
-        grid.push_back(std::move(line));
-    }
-    return TrailMap{grid};
-}
-
 TrailMap::TrailMap(const std::vector<std::string> &grid_) : grid(grid_) {
     assert(grid.height > 2 && grid.width > 2);
     // starting point

2024/src/day04.hpp

@@ -78,12 +78,7 @@ bool check_mas(const Grid<char> &grid, const Pos &p) {
 }
 
 Grid<char> read_input(std::istream &is) {
-    std::vector<std::string> lines;
-    std::string line;
-    while (std::getline(is, line)) {
-        lines.push_back(std::move(line));
-    }
-    return Grid<char>{std::move(lines)};
+    return Grid<char>{aoc::read_lines(is)};
 }
 
 } // namespace aoc::day04

2024/src/day12.hpp

@@ -65,13 +65,7 @@ class Garden {
 };
 
 Garden Garden::read(std::istream &is) {
-    // read file line-by-line
-    std::vector<std::string> plot_data;
-    std::string line;
-    while (std::getline(is, line)) {
-        plot_data.push_back(line);
-    }
-    Garden garden{aoc::ds::Grid<char>{plot_data}};
+    Garden garden{aoc::ds::Grid<char>{aoc::read_lines(is)}};
     garden.plots.for_each_with_pos(
         std::bind_front(&Garden::process_plot, &garden));
     return garden;

aoc_lib/src/lib.hpp

@@ -23,6 +23,7 @@
 #include <string>           // for string, operator==
 #include <type_traits> // for underlying_type_t, is_same_v, is_signed_v, conditional_t, is_const_v
 #include <utility> // for move
+#include <vector>  // for vector
 
 namespace aoc {
 
@@ -489,6 +490,18 @@ std::string read_whole_stream(std::istream &is) {
     return std::string{std::istreambuf_iterator<char>(is), {}};
 }
 
+/**
+ * @brief Reads lines from a stream.
+ */
+std::vector<std::string> read_lines(std::istream &is) {
+    std::vector<std::string> lines;
+    std::string line;
+    while (std::getline(is, line)) {
+        lines.push_back(std::move(line));
+    }
+    return lines;
+}
+
 } // namespace aoc
 
 template <std::integral int_type>