ptx-90-parser 0.2.3

Parse NVIDIA PTX 9.0 assembly into a structured AST and explore modules via a CLI.
Documentation 
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//! Original PTX specification:
//!
//! alloca.type  ptr, size{, immAlign};
//! .type = { .u32, .u64 };

#![allow(unused)]

use crate::lexer::PtxToken;
use crate::parser::{PtxParseError, PtxParser, PtxTokenStream, Span};
use crate::r#type::common::*;

pub mod section_0 {
    use super::*;
    use crate::r#type::instruction::alloca::section_0::*;

    // ============================================================================
    // Generated enum parsers
    // ============================================================================

    impl PtxParser for Type {
        fn parse(stream: &mut PtxTokenStream) -> Result<Self, PtxParseError> {
            // Try U32
            {
                let saved_pos = stream.position();
                if stream.expect_string(".u32").is_ok() {
                    return Ok(Type::U32);
                }
                stream.set_position(saved_pos);
            }
            let saved_pos = stream.position();
            // Try U64
            {
                let saved_pos = stream.position();
                if stream.expect_string(".u64").is_ok() {
                    return Ok(Type::U64);
                }
                stream.set_position(saved_pos);
            }
            stream.set_position(saved_pos);
            let span = stream
                .peek()
                .map(|(_, s)| s.clone())
                .unwrap_or(Span { start: 0, end: 0 });
            let expected = &[".u32", ".u64"];
            let found = stream
                .peek()
                .map(|(t, _)| format!("{:?}", t))
                .unwrap_or_else(|_| "<end of input>".to_string());
            Err(crate::parser::unexpected_value(span, expected, found))
        }
    }

    impl PtxParser for AllocaType {
        fn parse(stream: &mut PtxTokenStream) -> Result<Self, PtxParseError> {
            stream.expect_string("alloca")?;
            let type_ = Type::parse(stream)?;
            stream.expect_complete()?;
            let ptr = GeneralOperand::parse(stream)?;
            stream.expect_complete()?;
            stream.expect(&PtxToken::Comma)?;
            let size = GeneralOperand::parse(stream)?;
            stream.expect_complete()?;
            let saved_pos = stream.position();
            let has_comma = stream.expect(&PtxToken::Comma).is_ok();
            if !has_comma {
                stream.set_position(saved_pos);
            }
            let saved_pos = stream.position();
            let immalign = match GeneralOperand::parse(stream) {
                Ok(val) => Some(val),
                Err(_) => {
                    stream.set_position(saved_pos);
                    None
                }
            };
            stream.expect_complete()?;
            stream.expect_complete()?;
            stream.expect(&PtxToken::Semicolon)?;
            Ok(AllocaType {
                type_,
                ptr,
                size,
                immalign,
            })
        }
    }
}