feat: add std.d

crates/erg_compiler/lib/std.d/Float.d.er

@@ -0,0 +1,32 @@
+.Float: ClassType
+.Float.
+    '''
+    the real part of a complex number
+    '''
+    '''japanese
+    複素数の実部
+    '''
+    Real: Float
+    '''
+    the imaginary part of a complex number
+    '''
+    '''japanese
+    複素数の虚部
+    '''
+    Imag: Float
+    '''
+    Return a hexadecimal representation of a floating-point number.
+    '''
+    '''erg
+    assert (100.0).hex() == "0x1.9000000000000p+6"
+    assert (12.34).hex() == "0x1.8ae147ae147aep+3"
+    '''
+    hex: (self: .Float) -> Str
+    '''
+    Return True if the float is an integer.
+    '''
+    '''erg
+    assert (1.0).is_integer()
+    assert not (1.1).is_integer()
+    '''
+    is_integer: (self: .Float) -> Bool

crates/erg_compiler/lib/std.d/Int.d.er

@@ -0,0 +1,28 @@
+.Int: ClassType
+.Int.
+    '''
+    Number of ones in the binary representation of the absolute value of self.
+
+    Also known as the population count.
+    '''
+    '''japanese
+    2進数表現の絶対値の中の1の数。
+
+    ハミング重みとも呼ばれる。
+    '''
+    '''erg
+    assert bin(13) == "0b1101"
+    assert 13.bit_count() == 3
+    '''
+    bit_count: (self: .Int) -> Nat
+    '''
+    Number of bits necessary to represent self in binary.
+    '''
+    '''japanese
+    2進数表現においてselfを表すのに必要なビット数。
+    '''
+    '''erg
+    assert bin(37) == "0b100101"
+    assert 37.bit_length() == 6
+    '''
+    bit_length: (self: .Int) -> Nat

crates/erg_compiler/lib/std.d/Str.d.er

@@ -0,0 +1,33 @@
+.Str: ClassType
+.Str.
+    '''
+    Return a capitalized version of the string.
+
+    More specifically, make the first character have upper case and the rest lower
+    case.
+    '''
+    '''erg
+    assert "hello".capitalize() == "Hello"
+    assert "HELLO".capitalize() == "Hello"
+    '''
+    capitalize: (self: .Str) -> .Str
+    '''
+    Return a version of the string suitable for caseless comparisons.
+    '''
+    '''erg
+    assert "camelCase".casefold() == "camelcase"
+    assert "CamelCase".casefold() == "camelcase"
+    assert "FULLCAPS".casefold() == "fullcaps"
+    assert "snake_case".casefold() == "snake_case"
+    '''
+    casefold: (self: .Str) -> .Str
+    '''
+    Return a centered string of length width.
+
+    Padding is done using the specified fill character (default is a space).
+    '''
+    '''erg
+    assert "hello".center(10) == "  hello   "
+    assert "hello".center(10, "-") == "--hello---"
+    '''
+    center: (self: .Str, width: Int, fillchar: .Str) -> .Str