parzig
所属分类：collect
开发工具：Zig
文件大小：0KB
下载次数：0
上传日期：2021-08-20 11:25:47
上 传 者：
sh-1993
说明： Zig的分析器组合器库
(Parser Combinator library for Zig)
文件列表:
LICENSE (1070, 2021-08-17)
build.zig (420, 2021-08-17)
examples/ (0, 2021-08-17)
examples/numeric_expression.zig (976, 2021-08-17)
exports.zig (1839, 2021-08-17)
src/ (0, 2021-08-17)
src/ghost_party.zig (132, 2021-08-17)
src/input.zig (4070, 2021-08-17)
src/meta.zig (1510, 2021-08-17)
src/parser.zig (12019, 2021-08-17)
src/result.zig (2765, 2021-08-17)
src/string_parser.zig (6665, 2021-08-17)
src/testing.zig (2440, 2021-08-17)
[](https://github.com/notCalle/parzig/actions?query=workflow%3Azig-nightly)
[](https://github.com/notCalle/parzig/actions?query=workflow%3Azig-v0.8.0)
# ParZig
A parser combinator library for [Zig].
## Install
- Git submodule
```shell
git submodule add https://github.com/notCalle/parzig lib/parzig
```
```zig
const parzig = Pkg { .name = "parzig", .path = "lib/parzig/exports.zig" };
```
- Import declaration for [`zkg`]
```zig
pub const parzig = zkg.import.git(
"https://github.com/notCalle/parzig",
"main",
null,
);
```
## Examples
- Party Ghosts vs Ghost Parties
```zig
usingnamespace @import("parzig");
const Ghost = Char('');
const Party = Char('');
const ghost = "";
const party = "";
test "ghost party" {
const GhostParty = Ghost.Seq(Party));
const ghost_party = ghost ++ party;
const party_ghost = party ++ ghost;
std.testing.expectEqualSlices(
u8,
ghost_party,
GhostParty.parse(ghost_party).value().?,
);
std.testing.expect(.None == GhostParty.parse(party_ghost));
}
```
- Numeric expression evaluator
```zig
usingnamespace @import("parzig");
const Expression = Parser(struct {
pub fn parse(input: Input) Result(i32) {
return Term.Opt(AddSub.Seq(Term)).Map(evalExpression);
}
});
const Term = Parser(struct {
pub fn parse(input: Input) Result(i32) {
return Factor.Opt(MulDiv.Seq(Factor)).Map(evalTerm);
}
});
const Factor = Parser(struct {
pub fn parse(input: Input) Result(i32) {
return Opt(Char('-')).Seq(Number.Or(Paren)).Map(evalFactor);
}
});
const Number = Parser(struct {
pub fn parse(input: Input) Result(i32) {
return CharRange('0', '9').Many1.Map(evalNumber);
}
});
const Paren = Parser(struct {
pub fn parse(input: Input) Result(i32) {
return Char('(').Seq(Expression).Seq(Char(')')).Map(evalParen);
}
});
// ...
test "" {
std.testing.expectEqual(
Result(i32).some(7, ""),
Expression.parse("-(1-2)*3+4"),
);
}
```
[Zig]: https://ziglang.org
[`zkg`]: https://github.com/mattnite/zkg
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