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mod into_value;
mod literal;
mod range;
mod statements;
pub use crate::ast::range::TextRange;
use crate::{
value::{parse_number, Decimal, Integer, Text, TextDelimiter},
Value,
};
use num::{BigInt, Num};
use std::fmt::{self, Debug, Formatter};
pub use statements::{ExtendFormat,ExtendStatement};
#[derive(Clone, Eq, PartialEq)]
pub struct AST {
/// AST data
pub kind: ASTKind,
/// 1-indexed start to end position
pub range: Option<TextRange>,
/// Whitespace, Newline, Comment
pub additional: Option<String>,
}
#[derive(Debug, Clone, Eq, PartialEq)]
pub enum ASTKind {
/// Placeholder
/// Unreachable structure
None,
/// Root of all nodes
Program(Vec<AST>),
/// Flattened structure
Sequence(Vec<AST>),
/// Plain Text, NewLines
Span(String),
ExtendStatement(Box<ExtendStatement>),
/// `[list.scope]`
ListScope(usize, Box<AST>),
/// `{dict.scope}`
DictScope(usize, Box<AST>),
///
Pair(Box<AST>, Box<AST>),
/// `null`
Null,
/// `true` | `false`
Boolean(bool),
///
String(Box<Text>),
///
Namespace(Vec<AST>),
///
Integer(Box<Integer>),
///
Decimal(Box<Decimal>),
///
Cite(Box<AST>),
///
Dict(Vec<AST>),
///
List(Vec<AST>),
}
impl Debug for AST {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
match self {
AST { kind, range, additional } => {
let mut builder = f.debug_struct("AST");
builder.field("kind", kind);
if let Some(s) = range {
builder.field("range", s);
}
if let Some(s) = additional {
builder.field("additional", s);
}
builder.finish()
}
}
}
}
impl Default for AST {
fn default() -> Self {
Self { kind: ASTKind::None, range: Default::default(), additional: None }
}
}
impl From<ASTKind> for AST {
fn from(kind: ASTKind) -> Self {
Self { kind, range: None, additional: None }
}
}
// impl AST {
// pub fn as_vec(&self) -> Vec<AST> {
// match &self.kind {
// ASTKind::Program(v) | ASTKind::Block(v) => v.to_owned(),
// _ => vec![],
// }
// }
// }
impl AST {
pub fn set_additional(&mut self, info: impl Into<String>) {
self.additional = Some(info.into())
}
pub fn set_range(&mut self, range: TextRange) {
self.range = Some(range)
}
}
impl AST {
pub fn program(children: Vec<AST>) -> Self {
Self { kind: ASTKind::Program(children), range: None, additional: None }
}
pub fn block(children: Vec<AST>) -> Self {
Self { kind: ASTKind::Sequence(children), range: None, additional: None }
}
// pub fn statement(children: Vec<AST>, r: TextRange) -> Self {
// Self { kind: ASTKind::Statement(children), range: box_range(r) }
// }
//
// pub fn if_else_chain(cds: Vec<AST>, acts: Vec<AST>, r: TextRange) -> Self {
// let kind = ASTKind::IfElseChain(Box::new(IfElseChain::build(cds, acts)));
// Self { kind, range: box_range(r) }
// }
//
// pub fn for_in_loop(pattern: AST, terms: AST, block: AST, guard: Option<AST>, for_else: Option<AST>, r: TextRange) -> Self {
// let kind = ASTKind::ForInLoop(Box::new(ForInLoop { pattern, terms, guard, block, for_else }));
// Self { kind, range: box_range(r) }
// }
//
// pub fn expression(children: AST, eos: bool, r: TextRange) -> Self {
// let kind = ASTKind::Expression(Box::new(children), eos);
// Self { kind, range: box_range(r) }
// }
//
// pub fn operation(op: &str, kind: &str, r: TextRange) -> Self {
// let o = match kind {
// "<" => Operator::prefix(op),
// ">" => Operator::suffix(op),
// _ => Operator::infix(op),
// };
// let kind = ASTKind::Operator(Box::new(o));
// Self { kind, range: box_range(r) }
// }
//
// pub fn string_expression(value: Vec<AST>, handler: Option<AST>, r: TextRange) -> Self {
// let kind = ASTKind::StringExpression(Box::new(StringExpression { handler, inner: value }));
// Self { kind, range: box_range(r) }
// }
//
// pub fn infix_expression(op: AST, lhs: AST, rhs: AST, r: TextRange) -> Self {
// let kind = ASTKind::InfixExpression(Box::new(InfixExpression { op, lhs, rhs }));
// Self { kind, range: box_range(r) }
// }
//
// pub fn prefix_expression(op: AST, rhs: AST, r: TextRange) -> Self {
// let kind = ASTKind::PrefixExpression(Box::new(UnaryExpression { op, base: rhs }));
// Self { kind, range: box_range(r) }
// }
//
// pub fn suffix_expression(op: AST, lhs: AST, r: TextRange) -> Self {
// let kind = ASTKind::PrefixExpression(Box::new(UnaryExpression { op, base: lhs }));
// Self { kind, range: box_range(r) }
// }
//
// pub fn call_chain(chain: CallChain, r: TextRange) -> Self {
// Self { kind: ASTKind::CallChain(Box::new(chain)), range: box_range(r) }
// }
//
// pub fn call_index(index: &str, r: TextRange) -> Self {
// let n = BigInt::parse_bytes(index.as_bytes(), 10).unwrap_or_default();
// Self { kind: ASTKind::CallIndex(Box::new(n)), range: box_range(r) }
// }
//
// pub fn template(value: Template, r: TextRange) -> Self {
// Self { kind: ASTKind::Template(Box::new(value)), range: box_range(r) }
// }
//
pub fn null() -> Self {
Self { kind: ASTKind::Null, range: None, additional: None }
}
pub fn boolean(value: bool) -> Self {
Self { kind: ASTKind::Boolean(value), range: None, additional: None }
}
pub fn string(value: Text) -> Self {
Self { kind: ASTKind::String(Box::new(value)), range: None, additional: None }
}
// pub fn string_escaped(value: String, r: TextRange) -> Self {
// Self { kind: ASTKind::EscapedText(value), range: box_range(r) }
// }
pub fn integer(value: &str) -> Self {
let n = BigInt::from_str_radix(value, 10).unwrap_or_default();
Self { kind: ASTKind::Integer(Box::new(Integer::from(n))), range: None, additional: None }
}
pub fn number(value: &str) -> Self {
let kind = match parse_number(value) {
Some(Value::Integer(n)) => ASTKind::Integer(n),
Some(Value::Decimal(n)) => ASTKind::Decimal(n),
_ => ASTKind::Null,
};
Self { kind, range: None, additional: None }
}
pub fn namespace(value: Vec<AST>) -> Self {
Self { kind: ASTKind::Namespace(value), range: None, additional: None }
}
pub fn list(value: Vec<AST>) -> Self {
Self { kind: ASTKind::List(value), range: None, additional: None }
}
pub fn dict(pairs: Vec<AST>) -> Self {
Self { kind: ASTKind::Dict(pairs), range: None, additional: None }
}
pub fn pair(lhs: AST, rhs: AST) -> Self {
Self { kind: ASTKind::Pair(Box::new(lhs), Box::new(rhs)), range: None, additional: None }
}
}
impl Text {
pub fn string_escaped(value: impl Into<String>, handler: impl Into<String>, delimiter: usize) -> Self {
let handler = handler.into();
let handler = match handler.len() {
0 => None,
_ => Some(handler),
};
Text { handler, delimiter: TextDelimiter::Quotation(delimiter), value: value.into() }
}
pub fn string_literal(value: impl Into<String>, handler: impl Into<String>, delimiter: usize) -> Self {
let handler = handler.into();
let handler = match handler.len() {
0 => None,
_ => Some(handler),
};
Text { handler, delimiter: TextDelimiter::Apostrophe(delimiter), value: value.into() }
}
pub fn string_bare(value: impl Into<String>) -> Self {
Text { handler: None, delimiter: TextDelimiter::Bare, value: value.into() }
}
}