10000 Expose a method to parse AST from tokens directly by charliermarsh · Pull Request #4229 · RustPython/RustPython · GitHub
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Expose a method to parse AST from tokens directly #4229

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Merged
merged 2 commits into from
Oct 17, 2022
Merged

Expose a method to parse AST from tokens directly #4229

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71de630
Expose a method to parse AST from tokens directly
charliermarsh Oct 17, 2022
9ced976
Remove parse_program_tokens
charliermarsh Oct 17, 2022
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15 changes: 15 additions & 0 deletions compiler/parser/src/parser.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@
//! parse a whole program, a single statement, or a single
//! expression.

use crate::lexer::LexResult;
pub use crate::mode::Mode;
use crate::{ast, error::ParseError, lexer, python};
use std::iter;
Expand Down Expand Up @@ -80,6 +81,20 @@ pub fn parse(source: &str, mode: Mode, source_path: &str) -> Result<ast::Mod, Pa
.map_err(|e| crate::error::parse_error_from_lalrpop(e, source_path))
}

// Parse a given token iterator.
pub fn parse_tokens(
lxr: impl IntoIterator<Item = LexResult>,
mode: Mode,
source_path: &str,
) -> Result<ast::Mod, ParseError> {
let marker_token = (Default::default(), mode.to_marker(), Default::default());
let tokenizer = iter::once(Ok(marker_token)).chain(lxr);

python::TopParser::new()
.parse(tokenizer)
.map_err(|e| crate::error::parse_error_from_lalrpop(e, source_path))
}

#[cfg(test)]
mod tests {
use super::*;
Expand Down
0