jeff/expressive
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Sync readme

Browse Source
This commit is contained in:
Sebastian Schmidt 2019-04-13 18:27:59 +02:00
parent 0af5e3ed32
commit 1c68866777
1 changed files with 17 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
README.md
View File

@ -18,7 +18,7 @@ Add `evalexpr` as dependency to your `Cargo.toml`:
```toml
[dependencies]
evalexpr = "3"
evalexpr = "5"
```
Add the `extern crate` definition to your `main.rs` or `lib.rs`:
@ -133,7 +133,7 @@ Supported binary operators:
| * | 100 | Product |
| / | 100 | Division |
| % | 100 | Modulo |
| + | 95 | Sum |
| + | 95 | Sum or String Concatenation |
| - | 95 | Difference |
| < | 80 | Lower than |
| \> | 80 | Greater than |
@ -210,13 +210,22 @@ assert_eq!(healing_script.eval_int_with_context_mut(&mut context), Ok(5));
This crate offers a set of builtin functions.
| Identifier | Argument Amount | Description |
|------------|-----------------|-------------|
| min | >= 1 | Returns the minimum of the arguments |
| max | >= 1 | Returns the maximum of the arguments |
| 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 | Returns the character length of a string |
| `str::regex_matches` | 2 | String, String | Returns true if the first argument matches the regex in the second argument |
| `str::regex_replace` | 3 | String, String, String | Returns the first argument with all matches of the regex in the second argument replaced by the third argument |
| `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 |
The `min` and `max` functions can deal with a mixture of integer and floating point arguments.
They return the result as the type it was passed into the function.
If the maximum or minimum is an integer, then an integer is returned.
Otherwise, a float is returned.
The regex functions require the feature flag `regex_support`.
### Values
@ -323,7 +332,7 @@ This can be done like this in the `Cargo.toml`:
```toml
[dependencies]
evalexpr = {version = "3", features = ["serde_support"]}
evalexpr = {version = "5", features = ["serde_support"]}
```
This crate implements `serde::de::Deserialize` for its type `Node` that represents a parsed expression tree.