oak-typescript 0.0.11

TypeScript frontend for Oak
Documentation 
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use crate::{
    lexer::token_type::TypeScriptTokenType,
    parser::{State, TypeScriptParser},
};
use oak_core::{OakError, parser::pratt::PrattParser, source::Source};

impl<'config> TypeScriptParser<'config> {
    pub(crate) fn parse_class_declaration<'a, S: Source + ?Sized>(&self, state: &mut State<'a, S>) -> Result<(), OakError> {
        let cp = state.checkpoint();
        self.parse_class_declaration_content(state)?;
        state.finish_at(cp, crate::parser::element_type::TypeScriptElementType::ClassDeclaration);
        Ok(())
    }

    pub(crate) fn parse_class_declaration_content<'a, S: Source + ?Sized>(&self, state: &mut State<'a, S>) -> Result<(), OakError> {
        use crate::lexer::token_type::TypeScriptTokenType::*;
        self.eat(state, Abstract);
        self.expect(state, Class).ok();
        self.expect(state, IdentifierName).ok();
        if self.eat(state, Extends) {
            self.expect(state, IdentifierName).ok();
        }
        if self.eat(state, Implements) {
            while state.not_at_end() && !self.at(state, LeftBrace) {
                self.expect(state, IdentifierName).ok();
                if !self.eat(state, Comma) {
                    break;
                }
            }
        }
        self.parse_class_body(state)?;
        Ok(())
    }

    pub(crate) fn parse_class_body<'a, S: Source + ?Sized>(&self, state: &mut State<'a, S>) -> Result<(), OakError> {
        use crate::lexer::token_type::TypeScriptTokenType::*;
        let cp = state.checkpoint();
        self.expect(state, LeftBrace).ok();
        while state.not_at_end() && !self.at(state, RightBrace) {
            self.skip_trivia(state);
            let mcp = state.checkpoint();

            // Handle member decorators
            while self.at(state, At) {
                self.parse_decorator(state)?;
            }

            // Parse modifiers
            while state.not_at_end() {
                let kind = self.peek_kind(state);
                match kind {
                    Some(TypeScriptTokenType::Static)
                    | Some(TypeScriptTokenType::Public)
                    | Some(TypeScriptTokenType::Private)
                    | Some(TypeScriptTokenType::Protected)
                    | Some(TypeScriptTokenType::Readonly)
                    | Some(TypeScriptTokenType::Abstract)
                    | Some(TypeScriptTokenType::Async)
                    | Some(TypeScriptTokenType::Override) => state.bump(),
                    _ => break,
                }
            }

            // Handle get/set
            if self.at(state, Get) || self.at(state, Set) {
                state.bump();
            }

            if self.at(state, IdentifierName) {
                self.expect(state, IdentifierName).ok();
                if self.at(state, LeftParen) {
                    self.parse_parameters(state)?;
                    self.skip_trivia(state);
                    if self.eat(state, Colon) {
                        // Skip return type
                        while state.not_at_end() && !self.at(state, LeftBrace) && !self.at(state, Semicolon) && !self.at(state, RightBrace) {
                            state.bump();
                        }
                    }
                    if self.at(state, LeftBrace) {
                        self.parse_block(state)?;
                    }
                    else {
                        self.eat(state, Semicolon);
                    }
                    state.finish_at(mcp, crate::parser::element_type::TypeScriptElementType::MethodDeclaration);
                }
                else {
                    if self.eat(state, Colon) {
                        // Skip type
                        while state.not_at_end() && !self.at(state, Equal) && !self.at(state, Semicolon) && !self.at(state, RightBrace) {
                            state.bump();
                        }
                    }
                    if self.eat(state, Equal) {
                        PrattParser::parse(state, 0, self);
                    }
                    self.eat(state, Semicolon);
                    state.finish_at(mcp, crate::parser::element_type::TypeScriptElementType::PropertyDeclaration);
                }
            }
            else if self.at(state, Constructor) {
                state.bump();
                self.parse_parameters(state)?;
                self.skip_trivia(state);
                if self.eat(state, Colon) {
                    self.expect(state, IdentifierName).ok();
                }
                self.parse_block(state)?;
                state.finish_at(mcp, crate::parser::element_type::TypeScriptElementType::ConstructorDeclaration);
            }
            else if self.at(state, Semicolon) {
                state.bump(); // Skip extra semicolons in class body
            }
            else if !self.at(state, RightBrace) && state.not_at_end() {
                // If we encounter something unexpected, try to skip until next member or end of class
                state.bump();
            }
            else {
                break;
            }
        }
        self.expect(state, RightBrace).ok();
        state.finish_at(cp, crate::parser::element_type::TypeScriptElementType::ClassBody);
        Ok(())
    }
}