Updates parser to take LexTokens instead of TokenType
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301ffd7496
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@ -3,4 +3,5 @@ pub enum Message {
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UnexpectedCharacter(char),
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InvalidCharacter { found: char, expected: char },
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UnclosedStringLiteral,
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UnexpectedToken(),
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}
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@ -2,36 +2,46 @@ pub mod parsed_statement;
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#[cfg(test)]
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mod parser_tests;
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use super::lexer::lex_tokens::TokenType;
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use super::lexer::lex_tokens::{LexToken, TokenType};
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use crate::parsing::parser::parsed_statement::ParsedStatement;
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use itertools::{Itertools, MultiPeek};
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struct ParseReader<'a> {
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tokens: MultiPeek<core::slice::Iter<'a, TokenType>>,
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tokens: MultiPeek<core::slice::Iter<'a, LexToken>>,
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}
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impl<'a> ParseReader<'a> {
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pub fn peek(&mut self) -> &TokenType {
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pub fn peek(&mut self) -> &LexToken {
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let t = self.tokens.peek();
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match t {
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None => &TokenType::EndOfFile,
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Some(TokenType::WhiteSpace) => self.peek(),
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Some(v) => v,
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None => self.tokens.by_ref().last().unwrap(),
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Some(v) => {
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if v.token_type == TokenType::WhiteSpace {
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self.peek()
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} else {
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v
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}
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}
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}
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}
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pub fn next(&mut self) -> &TokenType {
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pub fn next(&mut self) -> &LexToken {
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let t = self.tokens.next();
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match t {
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None => &TokenType::EndOfFile,
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Some(TokenType::WhiteSpace) => self.next(),
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Some(v) => v,
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None => self.tokens.by_ref().last().unwrap(),
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Some(v) => {
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if v.token_type == TokenType::WhiteSpace {
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self.next()
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} else {
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v
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}
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}
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}
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}
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pub fn consume(&mut self, token: TokenType) -> &TokenType {
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pub fn consume(&mut self, token: TokenType) -> &LexToken {
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let n = self.next();
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if n != &token {
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if n.token_type != token {
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// TODO: log error
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unimplemented!()
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}
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@ -44,7 +54,7 @@ impl<'a> ParseReader<'a> {
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}
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}
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pub fn parse(tokens: Vec<TokenType>) -> Box<ParsedStatement> {
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pub fn parse(tokens: Vec<LexToken>) -> Box<ParsedStatement> {
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let mut reader = ParseReader {
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tokens: tokens.iter().multipeek(),
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};
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@ -55,7 +65,7 @@ fn parse_script(reader: &mut ParseReader) -> Box<ParsedStatement> {
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let mut vec: Vec<Box<ParsedStatement>> = Vec::new();
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loop {
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let n = reader.peek();
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match n {
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match n.token_type {
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TokenType::NamespaceKeyword => {
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vec.push(parse_namespace(reader));
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}
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@ -73,7 +83,7 @@ fn parse_namespace(reader: &mut ParseReader) -> Box<ParsedStatement> {
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reader.next(); // Consume namespace
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let identifier_token = reader.next();
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let s: String;
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match identifier_token {
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match &identifier_token.token_type {
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TokenType::Identifier(i) => {
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s = i.to_string();
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}
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@ -1,10 +1,22 @@
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use super::parse;
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use super::parsed_statement::ParsedStatement;
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use crate::parsing::lexer::lex_tokens::TokenType;
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use crate::parsing::lexer::lex_tokens::{LexToken, TokenType};
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use crate::span::Span;
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fn create_tokens(types: Vec<TokenType>) -> Vec<LexToken> {
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let mut v = Vec::with_capacity(types.len());
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for t in types {
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v.push(LexToken {
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token_type: t,
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span: Span::new(0, 0),
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});
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}
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v
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}
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#[test]
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fn test_empty_namespace() {
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let script = parse(vec![
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let script = parse(create_tokens(vec![
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TokenType::NamespaceKeyword,
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TokenType::WhiteSpace,
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TokenType::Identifier("foo".to_string()),
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@ -12,7 +24,7 @@ fn test_empty_namespace() {
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TokenType::OpenCurlyBracket,
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TokenType::CloseCurlyBracket,
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TokenType::EndOfFile,
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]);
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]));
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if let ParsedStatement::Script(inner) = script.as_ref() {
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assert_eq!(1, inner.len());
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if let ParsedStatement::Namespace(identifier, inner_script) = inner[0].as_ref() {
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