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Add precedences to operators in docs

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Sebastian Schmidt 2019-03-19 11:03:34 +02:00
parent 1e5b0bda22
commit a51680da08
2 changed files with 72 additions and 30 deletions
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51
README.md
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@ -11,23 +11,44 @@ Evalexpr is a powerful arithmetic and boolean expression evaluator.
## Features ## Features
### Operators
Supported binary operators: Supported binary operators:
| Operator | Description | | Operator | Precedence | Description | | Operator | Precedence | Description |
|----------|-------------| |----------|------------|-------------|---|----------|------------|-------------|
| + | Sum | | + | 95 | Sum | | < | 80 | Lower than |
| - | Difference | | - | 95 | Difference | | \> | 80 | Greater than |
| * | Product | | * | 100 | Product | | <= | 80 | Lower than or equal |
| / | Division | | / | 100 | Division | | \>= | 80 | Greater than or equal |
| % | Modulo | | % | 100 | Modulo | | == | 80 | Equal |
| < | Lower than | | && | 75 | Logical and | | != | 80 | Not equal |
| \> | Greater than | | &#124;&#124; | 70 | Logical or | | | |
| <= | Lower than or equal |
| \>= | Greater than or equal | Supported unary operators:
| == | Equal |
| != | Not equal | | Operator | Precedence | Description |
| && | Logical and | |----------|------------|-------------|
| &#124;&#124; | Logical or | | - | 110 | Negation |
| ! | 110 | Logical not |
### Values
Operators take values as arguments and produce values as results.
Values can be boolean, integer or floating point numbers.
Strings are supported as well, but there are no operations defined for them yet.
Integers are internally represented as `i64`, and floating point numbers are represented as `f64`.
Operators that take numbers as arguments can either take integers or floating point numbers.
If one of the arguments is a floating point number, all others are converted to floating point numbers as well, and the resulting value is a floating point number as well.
Otherwise, the result is an integer.
### Variables
Supported binary operators: `!` `!=` `""` `''` `()` `[]` `,` `>` `<` `>=` `<=` `==` Supported binary operators: `!` `!=` `""` `''` `()` `[]` `,` `>` `<` `>=` `<=` `==`
`+` unary/binary `-` `*` `/` `%` `&&` `||` `n..m`. `+` unary/binary `-` `*` `/` `%` `&&` `||` `n..m`.

51
src/lib.rs
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@ -1,23 +1,44 @@
//! //!
//! ## Features //! ## Features
//! //!
//! ### Operators
//!
//! Supported binary operators: //! Supported binary operators:
//! //!
//! | Operator | Description | //! | Operator | Precedence | Description | | Operator | Precedence | Description |
//! |----------|-------------| //! |----------|------------|-------------|---|----------|------------|-------------|
//! | + | Sum | //! | + | 95 | Sum | | < | 80 | Lower than |
//! | - | Difference | //! | - | 95 | Difference | | \> | 80 | Greater than |
//! | * | Product | //! | * | 100 | Product | | <= | 80 | Lower than or equal |
//! | / | Division | //! | / | 100 | Division | | \>= | 80 | Greater than or equal |
//! | % | Modulo | //! | % | 100 | Modulo | | == | 80 | Equal |
//! | < | Lower than | //! | && | 75 | Logical and | | != | 80 | Not equal |
//! | > | Greater than | //! | &#124;&#124; | 70 | Logical or | | | |
//! | <= | Lower than or equal | //!
//! | >= | Greater than or equal | //! Supported unary operators:
//! | == | Equal | //!
//! | != | Not equal | //! | Operator | Precedence | Description |
//! | && | Logical and | //! |----------|------------|-------------|
//! | || | Logical or | //! | - | 110 | Negation |
//! | ! | 110 | Logical not |
//!
//! ### Values
//!
//! Operators take values as arguments and produce values as results.
//! Values can be boolean, integer or floating point numbers.
//! Strings are supported as well, but there are no operations defined for them yet.
//!
//! Integers are internally represented as `i64`, and floating point numbers are represented as `f64`.
//! Operators that take numbers as arguments can either take integers or floating point numbers.
//! If one of the arguments is a floating point number, all others are converted to floating point numbers as well, and the resulting value is a floating point number as well.
//! Otherwise, the result is an integer.
//!
//! ### Variables
//!
//!
//!
//!
//!
//! //!
//!Supported binary operators: `!` `!=` `""` `''` `()` `[]` `,` `>` `<` `>=` `<=` `==` //!Supported binary operators: `!` `!=` `""` `''` `()` `[]` `,` `>` `<` `>=` `<=` `==`
//!`+` unary/binary `-` `*` `/` `%` `&&` `||` `n..m`. //!`+` unary/binary `-` `*` `/` `%` `&&` `||` `n..m`.