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https://github.com/shockerli/spiker
A Go package implementation of real-time computing
https://github.com/shockerli/spiker
ast go golang golang-library realtime-compute tdop
Last synced: 2 months ago
JSON representation
A Go package implementation of real-time computing
- Host: GitHub
- URL: https://github.com/shockerli/spiker
- Owner: shockerli
- License: mit
- Created: 2020-11-06T02:38:56.000Z (about 4 years ago)
- Default Branch: master
- Last Pushed: 2021-11-17T07:28:56.000Z (about 3 years ago)
- Last Synced: 2024-09-28T22:40:55.329Z (3 months ago)
- Topics: ast, go, golang, golang-library, realtime-compute, tdop
- Language: Go
- Homepage:
- Size: 200 KB
- Stars: 5
- Watchers: 2
- Forks: 2
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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- go-awesome - Spiker - A simple regular expression executor written in Go, supporting custom functions and process control, suitable for scenarios with complex business rules (Open source library / Interpreter)
README
# Spiker
[](https://pkg.go.dev/github.com/shockerli/spiker)
[](https://goreportcard.com/report/github.com/shockerli/spiker)
[](https://codecov.io/gh/shockerli/spiker)
> A Go package implementation of real-time computing
>
> lexer is inspired by [tdop](https://github.com/cristiandima/tdop)
English | [中文](README_ZH.md)
## Install
```sh
go get -u github.com/shockerli/spiker
```
## Usage
- Execute
```go
spiker.Execute(`1 + 2 * 3 / 4`)
```
- ExecuteWithScope
```go
var scopes = spiker.NewScopeTable("demo", 1, nil)
scopes.Set("a", 3)
scopes.Set("b", 4)
spiker.ExecuteWithScope(`a * 2 + b`, )
```
- Format
```go
spiker.Format(`a + b * 3`)
```
## Architecture
## Examples
### Keywords
```js
true/false/if/else/in/...
```
### Instruction separation
Spiker requires instructions to be terminated with a semicolon at the end of each statement
### Data type
- Number
> Integer, Float
```js
123;
-123;
12.34;
-12.34;
```
- String
```js
"abc"
```
- Boolean
```js
true;
false;
```
- Array
```js
[];
[1, 2, "a"];
[1, [], [2,], [3, 4,], 5];
```
- Dict
```js
v = [9:99, 8:8.8, "hello":12.02];
v = ["name":"jioby", "age":18, "log":[1:2, 3:4]];
v = [1, 9:9.9, 3];
```
### Arithmetic Operators
```js
1 + 2 - 3 * 4 / 5 % 6;
-0.19 + 3.2983;
3 ** 2;
```
### Bitwise Operators
```js
1 & 2;
1 | 2;
1 ^ 2;
1 >> 2;
1 << 2;
```
### Comparison Operators
```js
3 == 2;
3 != 2;
3 > 2;
3 >= 2;
3 < 2;
3 <= 2;
```
### Logical Operators
```js
!2;
1 && 2;
1 || 2;
```
### Assignment Operators
```js
v = 2;
v += 2;
v -= 2;
v *= 2;
v /= 2;
v %= 2;
a = b = c = 100;
```
### In Operator
```js
"john" in ["joy", "john"]; // true
100 in [100, 200, 300]; // true
9 in [9:"999", 8:"888"]; // true
9 in "123456789"; // true
```
### Build-in functions
- export
> return the expression value and interrupt script
```js
export(v);
export(v[i]);
```
- exist
> determines whether a variable or index exists
```js
exist(v);
exist(v[i]);
```
- len
> return the length of a value
```js
len("123");
len(v);
len(v[i]);
```
- del
> delete one or more variable or index
```js
del(a)
del(a, b)
del(a, b[1])
del(a[i], b[i])
```
### Custom function
- single
```js
sum = (a, b) -> a + b;
export(sum(1, 2)); # 3
```
```js
pow2 = x -> x ** 2;
export(pow2(5)); # 25
```
- block
```js
max = (a, b) -> {
if (a > b) {
return a;
} else {
return b;
}
};
export(max(1, 2)); # 2
```
### Control structures
- if/else
```js
if (a > b && c != d) {
a = b;
} else if (c > b) {
a = c;
} else {
export(c + d);
}
```
- while
```js
while (true) {
a = 0;
while (a < 10) {
print(a, "\n");
a += 1;
}
}
```
### More
```js
a = 101;
b = 102;
c = "103";
d = [1, 2, a, b, c+b, "abc"];
if (a > b) {
export(len(d));
} else if (a < b) {
if (c) {
d = -1000;
} else {
d = 0;
}
d += len(c);
export(d);
}
export(d[2]);
```
## License
This project is licensed under the terms of the [MIT](LICENSE) license.