ivabus/feval
1
0
Fork 0
mirror of https://github.com/ivabus/feval synced 2024-12-04 20:55:06 +03:00
Code Issues Projects Releases Packages Wiki Activity Actions
feval/README.md

112 lines
15 KiB
Markdown
Raw Permalink Normal View History

README.md: add badge
2023-05-31 10:35:20 +03:00
# fEval [![Build](https://github.com/ivabus/feval/actions/workflows/build.yml/badge.svg?branch=master)](https://github.com/ivabus/feval/actions/workflows/build.yml)
Initial commit
2023-01-25 22:03:01 +03:00
> Fast EVALuator
Update README.md
2023-01-25 22:08:08 +03:00
Simple command line tool, that helps you to fastly evaluate expressions. Based on [evalexpr](https://crates.io/crates/evalexpr) crate.
Update README
2023-01-25 22:19:12 +03:00
## Installation
```sh
cargo install feval
```
Update README.md
2023-01-25 22:08:08 +03:00
## Operators
Supported binary operators:
tasks.rs: add exit function
2023-02-03 15:45:34 +03:00
| Operator | Precedence | Description |
|---------------|------------|--------------------------------------------------------------------|
| ^ | 120 | Exponentiation |
| * | 100 | Product |
| / | 100 | Division (integer if both arguments are integers, otherwise float) |
| % | 100 | Modulo (integer if both arguments are integers, otherwise float) |
| + | 95 | Sum or String Concatenation |
| - | 95 | Difference |
| < | 80 | Lower than |
| \> | 80 | Greater than |
| <= | 80 | Lower than or equal |
| \>= | 80 | Greater than or equal |
| == | 80 | Equal |
| != | 80 | Not equal |
| && | 75 | Logical and |
| &#124;&#124; | 70 | Logical or |
| = | 50 | Assignment |
| += | 50 | Sum-Assignment or String-Concatenation-Assignment |
| -= | 50 | Difference-Assignment |
| *= | 50 | Product-Assignment |
| /= | 50 | Division-Assignment |
| %= | 50 | Modulo-Assignment |
| ^= | 50 | Exponentiation-Assignment |
| &&= | 50 | Logical-And-Assignment |
| &#124;&#124;= | 50 | Logical-Or-Assignment |
| , | 40 | Aggregation |
| ; | 0 | Expression Chaining |
Update README.md
2023-01-25 22:08:08 +03:00
Supported unary operators:
| Operator | Precedence | Description |
|----------|------------|-------------|
tasks.rs: add exit function
2023-02-03 15:45:34 +03:00
| - | 110 | Negation |
| ! | 110 | Logical not |
Update README.md
2023-01-25 22:08:08 +03:00
## Functions
tasks.rs: add exit function
2023-02-03 15:45:34 +03:00
| Identifier | Argument Amount | Argument Types | Description |
|---------------------|-----------------|-------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `min` | >= 1 | Numeric | Returns the minimum of the arguments |
| `max` | >= 1 | Numeric | Returns the maximum of the arguments |
| `len` | 1 | String/Tuple | Returns the character length of a string, or the amount of elements in a tuple (not recursively) |
| `floor` | 1 | Numeric | Returns the largest integer less than or equal to a number |
| `round` | 1 | Numeric | Returns the nearest integer to a number. Rounds half-way cases away from 0.0 |
| `ceil` | 1 | Numeric | Returns the smallest integer greater than or equal to a number |
| `if` | 3 | Boolean, Any, Any | If the first argument is true, returns the second argument, otherwise, returns the third |
| `typeof` | 1 | Any | returns "string", "float", "int", "boolean", "tuple", or "empty" depending on the type of the argument |
| `math::is_nan` | 1 | Numeric | Returns true if the argument is the floating-point value NaN, false if it is another floating-point value, and throws an error if it is not a number |
| `math::is_finite` | 1 | Numeric | Returns true if the argument is a finite floating-point number, false otherwise |
| `math::is_infinite` | 1 | Numeric | Returns true if the argument is an infinite floating-point number, false otherwise |
| `math::is_normal` | 1 | Numeric | Returns true if the argument is a floating-point number that is neither zero, infinite, [subnormal](https://en.wikipedia.org/wiki/Subnormal_number), or NaN, false otherwise |
| `math::ln` | 1 | Numeric | Returns the natural logarithm of the number |
| `math::log` | 2 | Numeric, Numeric | Returns the logarithm of the number with respect to an arbitrary base |
| `math::log2` | 1 | Numeric | Returns the base 2 logarithm of the number |
| `math::log10` | 1 | Numeric | Returns the base 10 logarithm of the number |
| `math::exp` | 1 | Numeric | Returns `e^(number)`, (the exponential function) |
| `math::exp2` | 1 | Numeric | Returns `2^(number)` |
| `math::pow` | 2 | Numeric, Numeric | Raises a number to the power of the other number |
| `math::cos` | 1 | Numeric | Computes the cosine of a number (in radians) |
| `math::acos` | 1 | Numeric | Computes the arccosine of a number. The return value is in radians in the range [0, pi] or NaN if the number is outside the range [-1, 1] |
| `math::cosh` | 1 | Numeric | Hyperbolic cosine function |
| `math::acosh` | 1 | Numeric | Inverse hyperbolic cosine function |
| `math::sin` | 1 | Numeric | Computes the sine of a number (in radians) |
| `math::asin` | 1 | Numeric | Computes the arcsine of a number. The return value is in radians in the range [-pi/2, pi/2] or NaN if the number is outside the range [-1, 1] |
| `math::sinh` | 1 | Numeric | Hyperbolic sine function |
| `math::asinh` | 1 | Numeric | Inverse hyperbolic sine function |
| `math::tan` | 1 | Numeric | Computes the tangent of a number (in radians) |
| `math::atan` | 1 | Numeric | Computes the arctangent of a number. The return value is in radians in the range [-pi/2, pi/2] |
| `math::atan2` | 2 | Numeric, Numeric | Computes the four quadrant arctangent in radians |
| `math::tanh` | 1 | Numeric | Hyperbolic tangent function |
| `math::atanh` | 1 | Numeric | Inverse hyperbolic tangent function. |
| `math::sqrt` | 1 | Numeric | Returns the square root of a number. Returns NaN for a negative number |
| `math::cbrt` | 1 | Numeric | Returns the cube root of a number |
| `math::hypot` | 2 | Numeric | Calculates the length of the hypotenuse of a right-angle triangle given legs of length given by the two arguments |
| `str::to_lowercase` | 1 | String | Returns the lower-case version of the string |
| `str::to_uppercase` | 1 | String | Returns the upper-case version of the string |
| `str::trim` | 1 | String | Strips whitespace from the start and the end of the string |
| `str::from` | >= 0 | Any | Returns passed value as string |
| `bitand` | 2 | Int | Computes the bitwise and of the given integers |
| `bitor` | 2 | Int | Computes the bitwise or of the given integers |
| `bitxor` | 2 | Int | Computes the bitwise xor of the given integers |
| `bitnot` | 1 | Int | Computes the bitwise not of the given integer |
| `shl` | 2 | Int | Computes the given integer bitwise shifted left by the other given integer |
| `shr` | 2 | Int | Computes the given integer bitwise shifted right by the other given integer |
| `exit` | 0 | None | Exits |
Update README.md
2023-01-25 22:08:08 +03:00
## Constants
tasks.rs: add exit function
2023-02-03 15:45:34 +03:00
| Identifier | Value | Description |
|------------|--------------------------------------------|----------------|
| `math::pi` | 3.141592653589793 (`std::f64::consts::PI`) | Pi |
| `math::e` | 2.718281828459045 (`std::f64::consts::E`) | Euler's number |
Add License to README.md
2023-01-25 22:08:47 +03:00
## License
README.md: add badge
2023-05-31 10:35:20 +03:00
This project is primarily distributed under the terms of the MIT license.
Reference in a new issue Copy permalink