Open
Description
The c2 module defines the following constants:
i8 min_i8 = -128;
i8 max_i8 = 127;
u8 min_u8 = 0;
u8 max_u8 = 255;
i16 min_i16 = -32768;
i16 max_i16 = 32767;
u16 min_u16 = 0;
u16 max_u16 = 65535;
i32 min_i32 = -2147483647-1;
i32 max_i32 = 2147483647;
u32 min_u32 = 0;
u32 max_u32 = 4294967295;
i64 min_i64 = -9223372036854775807-1;
i64 max_i64 = 9223372036854775807;
u64 min_u64 = 0;
u64 max_u64 = 18446744073709551615;
#if (ast.getWordSize() == 4)
i32 min_isize = -2147483647-1;
i32 max_isize = 2147483647;
u32 min_usize = 0;
u32 max_usize = 4294967295;
#else
i64 min_isize = -9223372036854775807-1;
i64 max_isize = 9223372036854775807;
u64 min_usize = 0;
u64 max_usize = 18446744073709551615;
#endif
This poses multiple problems:
- to use them, one must import the c2 module, which prevents the definition of variables called
c2, a rather common name if you already havecandc1... - they are constants, but the name does not start with an uppercase letter
- the name is not very intuitive: here are some common equivalents in other languages:
- C:
INT_MIN,INT32_MIN... - C++:
std::numeric_limits<int32_t>::min(), ... - Java:
Int.MIN_VALUE, ... - C#:
Int32.MinValue, ... - go:
math.MinInt32, ... - Rust:
i32::MIN, ...
- C:
The solution used in Rust is quite appealing and would translate in C2 as i32.MIN, etc. These constants would be always defined along a number of type functions for each builtin type such as:
i32 i32.abs(i32 v);
i32 i32.min(i32 a, i32 b); // for lack of a more general alternative i32 i32.min(...)
i32 i32.max(i32 a, i32 b); // same
Metadata
Metadata
Assignees
Labels
No labels