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Parse . operator

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This commit is contained in:
greg 2017-09-17 04:26:44 -07:00
parent 81c4566c2b
commit 505d23a327
1 changed files with 13 additions and 5 deletions
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18
src/schala_lang/parsing.rs
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@ -112,7 +112,7 @@ pub fn tokenize(input: &str) -> Vec<Token> {
},
c if c.is_whitespace() && c != '\n' => continue,
'\n' => Newline, ';' => Semicolon,
':' => Colon, ',' => Comma, '.' => Period,
':' => Colon, ',' => Comma,
'(' => LParen, ')' => RParen,
'{' => LCurlyBrace, '}' => RCurlyBrace,
'[' => LSquareBracket, ']' => RSquareBracket,
@ -191,13 +191,14 @@ fn handle_alphabetic(c: char, input: &mut CharIter) -> TokenType {
fn handle_operator(c: char, input: &mut CharIter) -> TokenType {
match c {
'<' | '>' | '|' => {
'<' | '>' | '|' | '.' => {
let ref next = input.peek().map(|&(_, c)| { c });
if !next.map(|n| { is_operator(&n) }).unwrap_or(false) {
return match c {
'<' => LAngleBracket,
'>' => RAngleBracket,
'|' => Pipe,
'.' => Period,
_ => unreachable!(),
}
}
@ -222,8 +223,6 @@ fn handle_operator(c: char, input: &mut CharIter) -> TokenType {
#[cfg(test)]
mod schala_tokenizer_tests {
use super::*;
use super::TokenType::*;
use super::Kw::*;
macro_rules! digit { ($ident:expr) => { DigitGroup(Rc::new($ident.to_string())) } }
macro_rules! ident { ($ident:expr) => { Identifier(Rc::new($ident.to_string())) } }
@ -571,6 +570,7 @@ impl Parser {
loop {
let op_str = match self.peek() {
Operator(op) => op,
Period => Rc::new(".".to_string()),
_ => break,
};
let new_precedence = Operation::get_precedence(op_str);
@ -579,6 +579,7 @@ impl Parser {
}
let op_str = match self.next() {
Operator(op) => op,
Period => Rc::new(".".to_string()),
_ => unreachable!(),
};
let rhs = self.precedence_expr(new_precedence)?;
@ -758,7 +759,6 @@ mod parse_tests {
use super::Statement::*;
use super::Declaration::*;
use super::Expression::*;
use super::ParseError;
macro_rules! rc {
($string:tt) => { Rc::new(stringify!($string).to_string()) }
@ -780,6 +780,7 @@ mod parse_tests {
#[test]
fn parsing_number_literals_and_binexps() {
parse_test!(".2", AST(vec![Expression(FloatLiteral(0.2))]));
parse_test!("8.1", AST(vec![Expression(FloatLiteral(8.1))]));
parse_test!("0b010", AST(vec![Expression(IntLiteral(2))]));
parse_test!("3; 4; 4.3", AST(
@ -811,6 +812,8 @@ mod parse_tests {
[
Expression(binexp!(op!("*"), binexp!(op!("+"), IntLiteral(1), IntLiteral(2)), IntLiteral(3)))
]));
parse_test!(".1 + .2", AST(vec![Expression(binexp!(op!("+"), FloatLiteral(0.1), FloatLiteral(0.2)))]));
}
#[test]
@ -828,6 +831,11 @@ mod parse_tests {
parse_test!("a <- b", AST(vec![Expression(binexp!(op!("<-"), var!("a"), var!("b")))]));
parse_test!("a || b", AST(vec![Expression(binexp!(op!("||"), var!("a"), var!("b")))]));
parse_test!("a<>b", AST(vec![Expression(binexp!(op!("<>"), var!("a"), var!("b")))]));
parse_test!("a.b.c.d", AST(vec![Expression(binexp!(op!("."),
binexp!(op!("."),
binexp!(op!("."), var!("a"), var!("b")),
var!("c")),
var!("d")))]));
}
#[test]