ast: Improve documentation linking
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@ -5,8 +5,8 @@
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//!
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//! ## Syntax
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//! [`Start`]` := `[`Program`] \
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//! [`Program`] := [`statement::Stmt`]* EOI \
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//! [`Identifier`] := [`IDENTIFIER`](crate::token::token_type::Type::Identifier)
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//! [`Program`]` := `[`statement::Stmt`]`* EOI` \
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//! [`Identifier`]` := `[`IDENTIFIER`](crate::token::token_type::Type::Identifier)
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//!
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//! See [statement], [literal], and [expression] for more information.
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@ -17,28 +17,28 @@ pub mod preamble {
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self, control,
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math::{self, operator},
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},
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literal, statement::Stmt,
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literal,
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statement::Stmt,
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visitor::{Visitor, Walk},
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Identifier, Program, Start,
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};
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}
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/// Marks the root of a tree
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/// # Syntax
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/// [`Start`] := [`Program`]
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/// [`Start`]` := `[`Program`]
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#[derive(Clone, Debug)]
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pub struct Start(pub Program);
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/// Contains an entire Conlang program
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/// # Syntax
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/// [`Program`] := [`statement::Stmt`]*
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/// [`Program`]` := `[`statement::Stmt`]`* EOI`
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#[derive(Clone, Debug)]
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pub struct Program(pub Vec<statement::Stmt>);
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/// An Identifier stores the name of an item
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/// # Syntax
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/// [`Identifier`] := [`IDENTIFIER`](crate::token::token_type::Type::Identifier)
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/// [`Identifier`]` := `[`IDENTIFIER`](crate::token::token_type::Type::Identifier)
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#[derive(Clone, Debug, Hash)]
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pub struct Identifier(pub String);
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@ -102,16 +102,16 @@ pub mod literal {
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/// Represents a literal value
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/// # Syntax
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/// [`Literal`] := [`String`] | [`char`] | [`bool`] | [`Float`] | [`u128`]
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/// [`Literal`]` := `[`String`]` | `[`char`]` | `[`bool`]` | `[`Float`]` | `[`u128`]
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#[derive(Clone, Debug)]
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pub enum Literal {
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/// Represents a literal string value
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/// # Syntax
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/// [`Literal::String`] := [`STRING`](crate::token::token_type::Type::String)
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/// [`Literal::String`]` := `[`STRING`](crate::token::token_type::Type::String)
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String(String),
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/// Represents a literal [char] value
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/// # Syntax
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/// [`Literal::Char`] := [`CHARACTER`](crate::token::token_type::Type::Character)
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/// [`Literal::Char`]` := `[`CHARACTER`](crate::token::token_type::Type::Character)
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Char(char),
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/// Represents a literal [bool] value
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/// # Syntax
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@ -121,17 +121,17 @@ pub mod literal {
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Bool(bool),
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/// Represents a literal float value
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/// # Syntax
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/// [`Float`] := [`FLOAT`](crate::token::token_type::Type::Float)
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/// [`Float`]` := `[`FLOAT`](crate::token::token_type::Type::Float)
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Float(Float),
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/// Represents a literal integer value
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/// # Syntax
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/// [`u128`] := [`INTEGER`](crate::token::token_type::Type::Integer)
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/// [`u128`]` := `[`INTEGER`](crate::token::token_type::Type::Integer)
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Int(u128),
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}
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/// Represents a literal float value
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/// # Syntax
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/// [`Float`] := [`FLOAT`](crate::token::token_type::Type::Float)
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/// [`Float`]` := `[`FLOAT`](crate::token::token_type::Type::Float)
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#[derive(Clone, Debug)]
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pub struct Float {
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pub sign: bool,
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@ -145,14 +145,14 @@ pub mod statement {
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//! A statement is an expression which evaluates to Empty
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//!
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//! # Syntax
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//! [`Stmt`] := [`Let`](Stmt::Let) | [`Expr`](Stmt::Expr)
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//! [`Let`](Stmt::Let) := `"let"` [`Identifier`] (`:` `Type`)? (`=` [`Expr`])? `;`
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//! [`Expr`](Stmt::Expr) := [`Expr`] `;`
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//! [`Stmt`]` := `[`Let`](Stmt::Let)` | `[`Expr`](Stmt::Expr)
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//! [`Let`](Stmt::Let)` := "let"` [`Identifier`] (`:` `Type`)? (`=` [`Expr`])? `;`
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//! [`Expr`](Stmt::Expr)` := `[`Expr`] `;`
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use super::{expression::Expr, Identifier};
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/// Contains a statement
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/// # Syntax
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/// [`Stmt`] := [`Let`](Stmt::Let) | [`Expr`](Stmt::Expr)
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/// [`Stmt`]` := `[`Let`](Stmt::Let)` | `[`Expr`](Stmt::Expr)
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#[derive(Clone, Debug)]
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pub enum Stmt {
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/// Contains a variable declaration
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@ -174,42 +174,41 @@ pub mod statement {
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pub mod expression {
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//! # Expressions
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//!
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//! The [expression] is the backbone of Conlang: everything is an expression.
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//! The [expression] is the backbone of Conlang: almost everything is an expression.
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//!
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//! ## Grammar
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//! Higher number = higher precedence.
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//!
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//! | # | Node | Function
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//! |----|------------------:|:----------------------------------------------
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//! | 0 | [`Expr`] | Contains an expression
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//! | 1 | [`Ignore`](math) | Ignores the preceding sub-expression's result
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//! | 2 | [`Assign`](math) | Assignment
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//! | 3 | [`Compare`](math) | Value Comparison
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//! | 4 | [`Logic`](math) | Boolean And, Or, Xor
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//! | 5 | [`Bitwise`](math) | Bitwise And, Or, Xor
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//! | 6 | [`Shift`](math) | Shift Left/Right
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//! | 7 | [`Term`](math) | Add, Subtract
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//! | 8 | [`Factor`](math) | Multiply, Divide, Remainder
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//! | 9 | [`Unary`](math) | Unary Dereference, Reference, Negate, Not
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//! | 10 | [`control::Flow`] | Branch expressions (`if`, `while`, `for`, `return`, `break`, `continue`), `else`
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//! | 10 | [`Group`] | Group expressions `(` [Expr]? `)` /* Can evaluate to Empty! */
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//! | 10 | [`Block`] | Block expressions `{` [Expr] `}`
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//! | 10 | [`Primary`] | Contains an [Identifier], [Literal](literal::Literal), [Block], [Group], or [Flow](control::Flow)
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//! | # | Node | Function
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//! |---|------------------:|:----------------------------------------------
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//! | 0 | [`Expr`] | Contains an expression
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//! | 1 | [`Assign`](math) | Assignment
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//! | 2 | [`Compare`](math) | Value Comparison
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//! | 3 | [`Logic`](math) | Boolean And, Or, Xor
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//! | 4 | [`Bitwise`](math) | Bitwise And, Or, Xor
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//! | 5 | [`Shift`](math) | Shift Left/Right
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//! | 6 | [`Term`](math) | Add, Subtract
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//! | 7 | [`Factor`](math) | Multiply, Divide, Remainder
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//! | 8 | [`Unary`](math) | Unary Dereference, Reference, Negate, Not
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//! | 9 | [`control::Flow`] | Branch expressions (`if`, `while`, `for`, `return`, `break`, `continue`)
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//! | 9 | [`Group`] | Group expressions `(` [Expr]? `)` /* Can evaluate to Empty! */
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//! | 9 | [`Block`] | Block expressions `{` [Expr] `}`
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//! | 9 | [`Primary`] | Contains an [Identifier], [Literal](literal::Literal), [Block], [Group], or [Flow](control::Flow)
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//!
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//! ## Syntax
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//! ```ignore
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//! Expr := control::Flow | math::Ignore
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//! Block := '{' Expr '}'
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//! Group := '(' Expr? ')'
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//! Primary := Identifier | Literal | Block | control::Branch
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//! ```
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//! [`Expr`]` := `[`math::Operation`] \
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//! [`Block`]` := '{' `[`Expr`]` '}'` \
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//! [`Group`]` := '(' `[`Expr`]`? ')'` \
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//! [`Primary`]` := `[`Identifier`]` | `[`Literal`](literal::Literal)` | `[`Block`]` |
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//! `[`Group`]` | `[`control::Flow`]
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//!
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//! See [control] and [math] for their respective production rules.
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use super::*;
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/// Contains an expression
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///
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/// # Syntax
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/// [`Expr`] := [`math::Operation`]
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/// [`Expr`]` := `[`math::Operation`]
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#[derive(Clone, Debug)]
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pub struct Expr {
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pub ignore: math::Operation,
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@ -218,12 +217,11 @@ pub mod expression {
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/// A [Primary] Expression is the expression with the highest precedence (i.e. the deepest
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/// derivation)
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/// # Syntax
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/// [`Primary`] :=
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/// [`IDENTIFIER`](Identifier)
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/// | [`Literal`](literal::Literal)
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/// | [`Block`]
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/// | [`Group`]
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/// | [`Branch`](control::Flow)
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/// [`Primary`]` := `[`IDENTIFIER`](Identifier)`
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/// | `[`Literal`](literal::Literal)`
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/// | `[`Block`]`
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/// | `[`Group`]`
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/// | `[`Branch`](control::Flow)
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#[derive(Clone, Debug)]
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pub enum Primary {
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Identifier(Identifier),
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@ -256,35 +254,39 @@ pub mod expression {
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//! ## Precedence Order
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//! Operator associativity is always left-to-right among members of the same group
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//!
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//! | # | Name | Operators | Associativity
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//! |---|----------:|:--------------------------------------|---------------
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// | | TODO: Try | `?` |
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//! | 1 | Unary | `*` `&` `-` `!` | Right
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//! | 2 | Factor | `*` `/` `%` | Left to Right
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//! | 3 | Term | `+` `-` | Left to Right
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//! | 4 | Shift | `<<` `>>` | Left to Right
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//! | 5 | Bitwise | `&` <code>|</code> | Left to Right
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//! | 6 | Logic | `&&` <code>||</code> `^^` | Left to Right
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//! | 7 | Compare | `<` `<=` `==` `!=` `>=` `>` | Left to Right
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#![doc = concat!( //| |
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r" | 8 | Assign |", r"`*=`, `/=`, `%=`, `+=`, `-=`, ",//|
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/* | | |*/ r"`&=`, <code>|=</code>, ", //|
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/* | | |*/ r"`^=`, `<<=`, `>>=`", r"| Right to Left")]
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//! | # | Name | Operators | Associativity
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//! |---|----------:|:----------------------------------------|---------------
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// | | TODO: Try | `?` |
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//! | 1 | Unary | [`*` `&` `-` `!`][3] | Right
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//! | 2 | Factor | [`*` `/` `%`][4] | Left to Right
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//! | 3 | Term | [`+` `-`][4] | Left to Right
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//! | 4 | Shift | [`<<` `>>`][4] | Left to Right
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//! | 5 | Bitwise | [`&` <code>|</code>][4] | Left to Right
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//! | 6 | Logic | [`&&` <code>||</code> `^^`][4]| Left to Right
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//! | 7 | Compare | [`<` `<=` `==` `!=` `>=` `>`][4] | Left to Right
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#![doc = concat!( //| |
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r" | 8 | Assign | [`*=`, `/=`, `%=`, `+=`, `-=`, ", //|
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/* | | |*/ r"`&=`, <code>|=</code>, ", //|
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/* | | |*/ r"`^=`, `<<=`, `>>=`][4]", r"| Left to Right")]
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//!
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//! <!-- Note: '|' == '|' /-->
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//!
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//! ## Syntax
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//! ```ignore
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//! /* All precedence levels other than Unary fold into Binary */
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//! Assign := Compare (AssignOp Compare)*
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//! Compare := Logic (CompareOp Logic )*
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//! Logic := Bitwise (LogicOp Bitwise)*
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//! Bitwise := Shift (BitwiseOp Shift )*
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//! Shift := Term (ShiftOp Term )*
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//! Term := Factor (TermOp Factor )*
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//! Factor := Unary (FactorOp Unary )*
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//! Unary := (UnaryOp)* Primary
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//! ```
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//! All precedence levels other than [Unary][1] fold into [Binary][2]
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//!
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//! [`Assign`][2]` := `[`Compare`][2]` (`[`AssignOp`][4]` `[`Compare`][2]`)*` \
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//! [`Compare`][2]` := `[`Logic`][2]` (`[`CompareOp`][4]` `[`Logic`][2]` )*` \
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//! [`Logic`][2]` := `[`Bitwise`][2]` (`[`LogicOp`][4]` `[`Bitwise`][2]`)*` \
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//! [`Bitwise`][2]` := `[`Shift`][2]` (`[`BitwiseOp`][4]` `[`Shift`][2]` )*` \
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//! [`Shift`][2]` := `[`Term`][2]` (`[`ShiftOp`][4]` `[`Term`][2]` )*` \
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//! [`Term`][2]` := `[`Factor`][2]` (`[`TermOp`][4]` `[`Factor`][2]` )*` \
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//! [`Factor`][2]` := `[`Unary`][1]` (`[`FactorOp`][4]` `[`Unary`][1]` )*` \
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//! [`Unary`][1]` := (`[`UnaryOp`][3]`)* `[`Primary`]
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//!
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//! [1]: Operation::Unary
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//! [2]: Operation::Binary
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//! [3]: operator::Unary
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//! [4]: operator::Binary
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use super::*;
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/// An Operation is a tree of [operands](Primary) and [operators](operator).
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@ -309,22 +311,11 @@ pub mod expression {
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}
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pub mod operator {
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//! | # | [Operators](self) | Associativity
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//! |---|---------------------------------------|--------------
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//! | 0 |[`*`, `&`, `-`, `!`](Unary) | Left to Right
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//! | 1 | `*`, `/`, `%` | Left to Right
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//! | 2 | `+`, `-` | Left to Right
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//! | 3 | `<<`, `>>` | Left to Right
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//! | 4 | `&`, <code>|</code>, `^` | Left to Right
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//! | 5 | `&&`, <code>||</code>, `^^` | Left to Right
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//! | 6 | `>`. `>=`. `==`. `!=`. `<=`. `<` | Left to Right
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#![doc = concat!(
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r"| 7 |", r"`*=`, `/=`, `%=`, `+=`, `-=`, ",//|
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/* | |*/ r"`&=`, <code>|=</code>, ", //|
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/* | |*/ r"`^=`, `<<=`, `>>=`, `=`", r"| Left to Right")]
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//! | 8 | `,` |
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//! # [Unary] and [Binary] operators
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//!
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//! An Operator represents the action taken during an [operation](super::Operation)
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/// Operators which take a single argument
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/// # Operators which take a single argument
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///
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/// (`*`, `&`, `-`, `!`, `@`, `#`, `~`)
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#[derive(Clone, Copy, Debug, PartialEq, Eq)]
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@ -346,52 +337,61 @@ pub mod expression {
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/// `~`: Undefined
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Tilde,
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}
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/// Operators which take two arguments
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/// # Operators which take two arguments
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/// ## Term operators:
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/// [`*`](Binary::Mul), [`/`](Binary::Div), [`%`](Binary::Rem)
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/// ## Factor operators
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/// [`+`](Binary::Add), [`-`](Binary::Sub)
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/// ## Shift operators
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/// [`<<`](Binary::Lsh), [`>>`](Binary::Rsh)
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/// ## Bitwise operators
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/// [`&`](Binary::BitAnd), [`|`](Binary::BitOr), [`^`](Binary::BitXor)
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/// ## Logic operators
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/// [`&&`](Binary::LogAnd), [`||`](Binary::LogOr), [`^^`](Binary::LogXor)
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/// ## Range operators
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/// [`..`](Binary::RangeExc), [`..=`](Binary::RangeInc)
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/// ## Comparison operators
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/// [`<`](Binary::Less), [`<=`](Binary::LessEq), [`==`](Binary::Equal),
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/// [`!=`](Binary::NotEq), [`>=`](Binary::GreaterEq), [`>`](Binary::Greater),
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/// ## Assignment operators
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/// [`=`](Binary::Assign), [`+=`](Binary::AddAssign), [`-=`](Binary::SubAssign),
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/// [`*=`](Binary::MulAssign), [`/=`](Binary::DivAssign), [`%=`](Binary::RemAssign),
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/// [`&=`](Binary::BitAndAssign), [`|=`](Binary::BitOrAssign),
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/// [`^=`](Binary::BitXorAssign) [`<<=`](Binary::ShlAssign),
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/// [`>>=`](Binary::ShrAssign)
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#[derive(Clone, Copy, Debug, PartialEq, Eq)]
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pub enum Binary {
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// Term operators
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/// `*`: Multiplication
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Mul,
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/// `/`: Division
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Div,
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/// `%`: Remainder
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Rem,
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// Factor operators
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/// `+`: Addition
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Add,
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/// `-`: Subtraction
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Sub,
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// Shift operators
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/// `<<`: Left Shift
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Lsh,
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/// `>>`: Right Shift
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Rsh,
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// Bitwise operators
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/// `&`: Bitwise AND
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BitAnd,
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/// `|`: Bitwise OR
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BitOr,
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/// `^`: Bitwise XOR
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BitXor,
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// Logic operators
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/// `&&`: Short-circuiting logical AND
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LogAnd,
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/// `||`: Short-circuiting logical OR
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LogOr,
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/// `^^`: **Non-short-circuiting** logical XOR
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LogXor,
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// Range operators
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/// `..`: Exclusive range
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RangeExc,
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/// `..=`: Inclusive range
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RangeInc,
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// Comparison operators
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/// `<`: Less-than Comparison
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Less,
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/// `<=`: Less-than or Equal Comparison
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@ -404,8 +404,6 @@ pub mod expression {
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GreaterEq,
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/// `>`: Greater-than Comparison
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Greater,
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// Assignment operators
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/// `=`: Assignment
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Assign,
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/// `+=`: Additive In-place Assignment
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@ -458,15 +456,17 @@ pub mod expression {
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//!
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//! [`continue` expressions][7] skip to the next iteration of a loop
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//! # Syntax
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//! ```rust,ignore
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//! Branch := While | If | For
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//! If := "if" Expr Block Else?
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//! While := "while" Expr Block Else?
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//! For := "for" Identifier "in" Expr Block Else?
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//! Else := "else" Block
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//! [`Flow`]` := `[`While`]` | `[`If`]` | `[`For`]` |
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//! `[`Break`]` | `[`Return`]` | `[`Continue`] \
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//!
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//! Break := "break" Expr
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//! ```
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//! [`While`]` := "while" `[`Expr`]` `[`Block`]` `[`Else`]`?` \
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//! [`If`]` := "if" `[`Expr`]` `[`Block`]` `[`Else`]`?` \
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//! [`For`]` := "for" `[`Identifier`]` "in" `[`Expr`]` `[`Block`]` `[`Else`]`?` \
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//! [`Else`]` := "else" `[`Block`] \
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//!
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//! [`Break`]` := "break" `[`Expr`] \
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//! [`Return`]` := "return" `[`Expr`] \
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//! [`Continue`]` := "continue"`
|
||||
//!
|
||||
//! [1]: If
|
||||
//! [2]: While
|
||||
@ -830,7 +830,7 @@ pub mod visitor {
|
||||
|
||||
/// Visit a [Primary] expression
|
||||
///
|
||||
/// [Primary] := [Identifier] | [Literal] | [Block] | [Flow]
|
||||
/// [`Primary`]` := `[`Identifier`]` | `[`Literal`]` | `[`Block`]` | `[`Flow`]
|
||||
fn visit_primary(&mut self, expr: &Primary) -> R {
|
||||
match expr {
|
||||
Primary::Identifier(v) => self.visit_identifier(v),
|
||||
@ -843,7 +843,8 @@ pub mod visitor {
|
||||
|
||||
/// Visit a [Flow] expression.
|
||||
///
|
||||
/// [Flow] := [While] | [If] | [For]
|
||||
/// [`Flow`]` := `[`While`]` | `[`If`]` | `[`For`]`
|
||||
/// | `[`Continue`]` | `[`Return`]` | `[`Break`]
|
||||
fn visit_branch_expr(&mut self, expr: &Flow) -> R {
|
||||
match expr {
|
||||
Flow::While(e) => self.visit_while(e),
|
||||
@ -874,7 +875,7 @@ pub mod visitor {
|
||||
fn visit_identifier(&mut self, ident: &Identifier) -> R;
|
||||
/// Visit a [Literal]
|
||||
///
|
||||
/// [Literal] := [String] | [char] | [bool] | [Float] | [u128]
|
||||
/// [`Literal`]` := `[`String`]` | `[`char`]` | `[`bool`]` | `[`Float`]` | `[`u128`]
|
||||
fn visit_literal(&mut self, literal: &Literal) -> R {
|
||||
match literal {
|
||||
Literal::String(l) => self.visit_string_literal(l),
|
||||
|
||||
Loading…
Reference in New Issue
Block a user