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Commit 18a87409 authored by Carlos Valencia's avatar Carlos Valencia
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oops, fixed Alternative

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with 126 additions and 43 deletions
.DS_Store 0 → 100644
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File added
src/combinators/common/characters/mod.rs
+ 56
− 0
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......@@ -23,6 +23,62 @@ impl Parser<char> for Char {
}
}
// #[derive(Clone, Debug)]
// pub enum Lit {
// S(String),
// C(char)
// }
// pub(crate) struct Literal {
// pub val: Lit
// }
// impl Parser<Lit> for Literal {
// fn parse_fun(&self, ctx: &mut crate::parser::Context) ->Result<Lit, String> {
// match self.val {
// Lit::S(s) => {
// match (StringP{s: s.chars().collect()}.parse_fun(ctx)) {
// Ok(s) => Ok(Lit::S(s)),
// Err(e) => Err(e),
// }
// },
// Lit::C(c) => {
// match (Char {c: c}.parse_fun(ctx)) {
// Ok(c) => Ok(Lit::C(c)),
// Err(e) => Err(e),
// }
// },
// }
// }
// }
pub(crate) struct StringP {
pub s: Vec<char>,
}
impl Parser<String> for StringP {
fn parse_fun(&self, ctx: &mut crate::parser::Context) ->Result<String, String> {
let mut index = 0;
let max_index = ctx.size;
let res = self.s.iter()
.take_while(|&&c| {
if index < max_index && c == ctx.input[index] {
index += 1;
true
} else {
false
}
}).collect::<String>();
if index == self.s.len() {
ctx.index += index;
Ok(res)
} else {
Err("Did not match string".to_string())
}
}
}
pub(crate) struct Item;
impl Parser<char> for Item {
......
src/combinators/common/integers/ints_basic.rs
+ 1
− 0
View file @ 18a87409
......@@ -137,6 +137,7 @@ impl Parser<char> for Whole {
}
}
#[derive(Copy, Clone)]
pub(crate) struct Digit;
......
src/combinators/common/integers/mod.rs
+ 0
− 1
View file @ 18a87409
......@@ -60,7 +60,6 @@ impl Parser<i32> for Int {
digits += 1;
(acc * 10) + c
});
let size = zeros + digits;
ctx.index += size;
Ok(s)
......
src/combinators/other/expressions/mod.rs
+ 26
− 23
View file @ 18a87409
......@@ -5,7 +5,7 @@ use crate::Parser;
use crate::parser::Context;
use crate::combinators::primitive_combinators::{Zip, Map, Alternative};
use crate::combinators::primitive_combinators::{Zip, Map, Alternative, Try};
use crate::combinators::non_primitive_combinators::{ThenL, ThenR};
use crate::combinators::common::characters::Char;
......@@ -37,40 +37,43 @@ impl Parser<ExprOutput> for Expr {
fn parse_fun(&self, ctx: &mut Context) ->Result<ExprOutput, String> {
Alternative {
parser_first: Map {
map_a_b_fun: |((i, operator) , rest) : ((i32, char), ExprOutput)| {
ExprOutput::E(Rest {
left: i,
operator: operator,
right: Box::new(rest)
})},
parser_a: Zip {
parser_first: Zip {
parser_first: Int,
parser_second: ThenR {
parser_first: Whitespace,
parser_second: ThenL {
parser_first: Alternative {
parser_first: Char {c: '+'},
parser_second: Char {c: '-'},
_t: PhantomData
parser_first: Try {
parser: Map {
map_a_b_fun: |((i, operator) , rest) : ((i32, char), ExprOutput)| {
ExprOutput::E(Rest {
left: i,
operator: operator,
right: Box::new(rest)
})},
parser_a: Zip {
parser_first: Zip {
parser_first: Int,
parser_second: ThenR {
parser_first: Whitespace,
parser_second: ThenL {
parser_first: Alternative {
parser_first: Char {c: '+'},
parser_second: Char {c: '-'},
_t: PhantomData
},
parser_second: Whitespace,
_a: PhantomData,
_b: PhantomData
},
parser_second: Whitespace,
_a: PhantomData,
_b: PhantomData
},
_a: PhantomData,
_b: PhantomData
},
parser_second: Expr,
_a: PhantomData,
_b: PhantomData
},
parser_second: Expr,
_a: PhantomData,
_b: PhantomData
},
_a: PhantomData,
_b: PhantomData
_t: PhantomData,
},
parser_second: Map {
map_a_b_fun: |i: i32| ExprOutput::I(i),
......@@ -91,7 +94,7 @@ mod test {
use super::{Expr, ExprOutput};
#[test]
fn hello_world() -> Result<(), String>{
fn expression() -> Result<(), String>{
match Expr.parse("10 - 006 + 8267").unwrap() {
ExprOutput::E(parsed) => {
......
src/combinators/primitive_combinators.rs
+ 12
− 9
View file @ 18a87409
......@@ -58,12 +58,12 @@ impl Parser<char> for Sat {
}
// If the parser fails after consuming input then it will backtrack and 'undo' what it has done
pub (crate) struct Try<T: Copy + Debug, P: Parser<T>> {
pub (crate) struct Try<T: Clone + Debug, P: Parser<T>> {
pub parser: P,
pub _t: PhantomData<T>
}
impl<T: Copy + Debug, P: Parser<T>> Parser<T> for Try<T, P> {
impl<T: Clone + Debug, P: Parser<T>> Parser<T> for Try<T, P> {
fn parse_fun(&self, ctx: &mut Context) -> Result<T, String> {
// Save context in case of failure
......@@ -83,6 +83,8 @@ impl<T: Copy + Debug, P: Parser<T>> Parser<T> for Try<T, P> {
}
}
// If the first one fails without consuming input, then the second one is atempted
pub (crate) struct Alternative<T: Debug + Clone, F:Parser<T>, P:Parser<T>> {
pub parser_first: F,
......@@ -101,18 +103,19 @@ impl<T: Debug + Clone, F:Parser<T>, P:Parser<T>> Parser<T> for Alternative<T,F,P
let res_parse_first = self.parser_first.parse_fun(ctx);
if res_parse_first.is_err() {
ctx.index = index_before;
ctx.row = row_before;
ctx.col = col_before;
return self.parser_second.parse_fun(ctx);
if ctx.index == index_before {
ctx.index = index_before;
ctx.row = row_before;
ctx.col = col_before;
return self.parser_second.parse_fun(ctx);
} else {
return res_parse_first;
}
}
res_parse_first
}
}
pub(crate) struct Zip<A: Debug + Clone, B: Debug + Clone, F: Parser<A>, P: Parser<B>> {
pub parser_first: F,
pub parser_second: P,
......
src/main.rs
+ 26
− 5
View file @ 18a87409
mod parser;
use std::{fs, marker::PhantomData};
use parser::{Parser};
mod combinators;
use combinators::{common::characters::{Char}, non_primitive_combinators::Many, other::expressions::Expr};
#[macro_use]
......@@ -11,13 +16,29 @@ mod preprocessor;
fn main() {
let p = parser!('h' *> ('e' *> 'l' *> 'l' *> 'o' <|> 'i') *> ' ' *> 'w' *> 'o' *> 'r' *> 'l' *> 'd' *> '!');
println!("{:#?}", p.parse("hello world!"));
println!("{:#?}", p.parse("hi world!"));
println!("{:#?}", p.parse("hey world!"));
// let p = parser!('h' *> ('e' *> 'l' *> 'l' *> 'o' <|> 'i') *> ' ' *> 'w' *> 'o' *> 'r' *> 'l' *> 'd' *> '!');
// println!("{:#?}", p.parse("hello world!"));
// println!("{:#?}", p.parse("hi world!"));
// println!("{:#?}", p.parse("hey world!"));
// let p = StringP {
// s: "hello".chars().collect()
// };
println!("{:#?}", parser!(many 'c' <~> many 'd').parse("cccd"));
// println!("{:#?}", p.parse("hellos"));
// let p = parser!('k');
let source = "./test.txt";
let file = fs::read_to_string(source).expect("File was not found or could not be read");
let many_parser = Many {
parser: Char {c: 'a'},
_t: PhantomData
};
if let Ok(l) = many_parser.parse(file.as_str()) {
println!("{}", l.len());
}
}
src/preprocessor/macros.rs
+ 4
− 5
View file @ 18a87409
#[macro_export]
macro_rules! char {
($e:literal) => {
......@@ -24,7 +23,7 @@ macro_rules! parser {
// at end of input, flush the operators to postfix
(@cvt ($ophead:tt $($optail:tt)*) ($($postfix:tt)*)) => { parser!(@cvt ($($optail)*) ($($postfix)* $ophead)) };
// 2. push an operator onto the stack if it's empty or has a left-paren on top
// 2. push an operator onto the stack if it's empty or has a left-parent on top
(@cvt ( ) $postfix:tt <|> $($tail:tt)*) => { parser!(@cvt (<|> ) $postfix $($tail)*) };
......@@ -56,10 +55,10 @@ macro_rules! parser {
(@cvt ( ) $postfix:tt <#> $($tail:tt)*) => { parser!(@cvt (<#> ) $postfix $($tail)*) };
(@cvt (LP $($optail:tt)*) $postfix:tt <#> $($tail:tt)*) => { parser!(@cvt (<#> LP $($optail)*) $postfix $($tail)*) };
// 3. push a left-paren onto the stack
// 3. push a left-parent onto the stack
(@cvt ($($operator:tt)*) $postfix:tt ($($inner:tt)*) $($tail:tt)*) => { parser!(@cvt (LP $($operator)*) $postfix $($inner)* RP $($tail)*) };
// 4. see right-paren, pop operators to postfix until left-paren
// 4. see right-parent, pop operators to postfix until left-parent
(@cvt (LP $($optail:tt)*) $postfix:tt RP $($tail:tt)*) => { parser!(@cvt ($($optail)*) $postfix $($tail)*) };
(@cvt ($ophead:tt $($optail:tt)*) ($($postfix:tt)*) RP $($tail:tt)*) => { parser!(@cvt ($($optail)*) ($($postfix)* $ophead) RP $($tail)*) };
......@@ -286,4 +285,4 @@ macro_rules! parser {
// | ^ operator stack
// ^ convert infix to postfix
}
\ No newline at end of file
}
src/test.txt 0 → 100644
+ 1
− 0
View file @ 18a87409
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa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\ No newline at end of file
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