From 9e19969e09ffee8aca39f28a42d566cc62b479d6 Mon Sep 17 00:00:00 2001
From: Adam Goertz <adambgoertz@gmail.com>
Date: Sat, 29 Jul 2023 02:55:25 +0000
Subject: [PATCH] Remove math.ln in favor of `@log`

---
 CMakeLists.txt      |  1 -
 lib/std/math.zig    |  3 +--
 lib/std/math/ln.zig | 34 ----------------------------------
 3 files changed, 1 insertion(+), 37 deletions(-)
 delete mode 100644 lib/std/math/ln.zig

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2bd95fdcc9..0765c5c0c4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -273,7 +273,6 @@ set(ZIG_STAGE2_SOURCES
     "${CMAKE_SOURCE_DIR}/lib/std/math/frexp.zig"
     "${CMAKE_SOURCE_DIR}/lib/std/math/isinf.zig"
     "${CMAKE_SOURCE_DIR}/lib/std/math/isnan.zig"
-    "${CMAKE_SOURCE_DIR}/lib/std/math/ln.zig"
     "${CMAKE_SOURCE_DIR}/lib/std/math/log.zig"
     "${CMAKE_SOURCE_DIR}/lib/std/math/log10.zig"
     "${CMAKE_SOURCE_DIR}/lib/std/math/log2.zig"
diff --git a/lib/std/math.zig b/lib/std/math.zig
index 25ecd779e9..6d5faeb7ee 100644
--- a/lib/std/math.zig
+++ b/lib/std/math.zig
@@ -244,7 +244,6 @@ pub const atan2 = @import("math/atan2.zig").atan2;
 pub const hypot = @import("math/hypot.zig").hypot;
 pub const expm1 = @import("math/expm1.zig").expm1;
 pub const ilogb = @import("math/ilogb.zig").ilogb;
-pub const ln = @import("math/ln.zig").ln;
 pub const log = @import("math/log.zig").log;
 pub const log2 = @import("math/log2.zig").log2;
 pub const log10 = @import("math/log10.zig").log10;
@@ -395,7 +394,6 @@ test {
     _ = hypot;
     _ = expm1;
     _ = ilogb;
-    _ = ln;
     _ = log;
     _ = log2;
     _ = log10;
@@ -438,6 +436,7 @@ pub const min = @compileError("deprecated; use @min instead");
 pub const max = @compileError("deprecated; use @max instead");
 pub const min3 = @compileError("deprecated; use @min instead");
 pub const max3 = @compileError("deprecated; use @max instead");
+pub const ln = @compileError("deprecated; use @log instead");
 
 /// Limit val to the inclusive range [lower, upper].
 pub fn clamp(val: anytype, lower: anytype, upper: anytype) @TypeOf(val, lower, upper) {
diff --git a/lib/std/math/ln.zig b/lib/std/math/ln.zig
deleted file mode 100644
index 65db861587..0000000000
--- a/lib/std/math/ln.zig
+++ /dev/null
@@ -1,34 +0,0 @@
-const std = @import("../std.zig");
-const math = std.math;
-const testing = std.testing;
-
-/// Returns the natural logarithm of x.
-///
-/// Special Cases:
-///  - ln(+inf)  = +inf
-///  - ln(0)     = -inf
-///  - ln(x)     = nan if x < 0
-///  - ln(nan)   = nan
-///  TODO remove this in favor of `@log`.
-pub fn ln(x: anytype) @TypeOf(x) {
-    const T = @TypeOf(x);
-    switch (@typeInfo(T)) {
-        .ComptimeFloat => {
-            return @as(comptime_float, @log(x));
-        },
-        .Float => return @log(x),
-        .ComptimeInt => {
-            return @as(comptime_int, @floor(@log(@as(f64, x))));
-        },
-        .Int => |IntType| switch (IntType.signedness) {
-            .signed => @compileError("ln not implemented for signed integers"),
-            .unsigned => return @as(T, @floor(@log(@as(f64, x)))),
-        },
-        else => @compileError("ln not implemented for " ++ @typeName(T)),
-    }
-}
-
-test "math.ln" {
-    try testing.expect(ln(@as(f32, 0.2)) == @log(0.2));
-    try testing.expect(ln(@as(f64, 0.2)) == @log(0.2));
-}