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builtin(str): implement withCapacity

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Signed-off-by: Prajwal S N <prajwalnadig21@gmail.com>
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Prajwal S N 2022-10-07 18:48:24 +05:30
parent f0786121fb
commit 9013e4ce11
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11 changed files with 59 additions and 2 deletions
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1
crates/compiler/builtins/bitcode/src/main.zig
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@ -144,6 +144,7 @@ comptime {
exportStrFn(str.strTrimLeft, "trim_left");
exportStrFn(str.strTrimRight, "trim_right");
exportStrFn(str.strCloneTo, "clone_to");
exportStrFn(str.withCapacity, "with_capacity");
inline for (INTEGERS) |T| {
str.exportFromInt(T, ROC_BUILTINS ++ "." ++ STR ++ ".from_int.");

4
crates/compiler/builtins/bitcode/src/str.zig
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@ -2596,6 +2596,10 @@ pub fn reserve(string: RocStr, capacity: usize) callconv(.C) RocStr {
}
}
pub fn withCapacity(capacity: usize) callconv(.C) RocStr {
return RocStr.allocate(0, capacity);
}
pub fn getScalarUnsafe(string: RocStr, index: usize) callconv(.C) extern struct { bytesParsed: usize, scalar: u32 } {
const slice = string.asSlice();
const bytesParsed = @intCast(usize, std.unicode.utf8ByteSequenceLength(slice[index]) catch unreachable);