1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
//! ErgoScript compiler

use super::binder::BinderError;
use super::hir::HirLoweringError;
use crate::ast;
use crate::binder::Binder;
use crate::hir;
use crate::mir;
use crate::parser::parse_error::ParseError;
use crate::script_env::ScriptEnv;
use crate::type_infer::assign_type;
use crate::type_infer::TypeInferenceError;

extern crate derive_more;
use derive_more::From;
use ergotree_ir::ergo_tree::ErgoTree;
use ergotree_ir::type_check::TypeCheckError;
use mir::lower::MirLoweringError;

/// Compilation errors
#[derive(Debug, PartialEq, From)]
pub enum CompileError {
    /// Parser error
    ParseError(Vec<ParseError>),
    /// Error on AST to HIR lowering
    HirLoweringError(HirLoweringError),
    /// Error on binder pass
    BinderError(BinderError),
    /// Error on type inference pass
    TypeInferenceError(TypeInferenceError),
    /// Error on HIT to MIR lowering
    MirLoweringError(MirLoweringError),
    /// Error on type checking
    TypeCheckError(TypeCheckError),
}

impl CompileError {
    /// Pretty formatted error with CST/AST/IR, etc.
    pub fn pretty_desc(&self, source: &str) -> String {
        match self {
            CompileError::ParseError(errors) => {
                errors.iter().map(|e| e.pretty_desc(source)).collect()
            }
            CompileError::HirLoweringError(e) => e.pretty_desc(source),
            CompileError::BinderError(e) => e.pretty_desc(source),
            CompileError::TypeInferenceError(e) => e.pretty_desc(source),
            CompileError::MirLoweringError(e) => e.pretty_desc(source),
            CompileError::TypeCheckError(e) => e.pretty_desc(),
        }
    }
}

/// Compiles given source code to [`ergotree_ir::mir::expr::Expr`], or returns an error
pub fn compile_expr(
    source: &str,
    env: ScriptEnv,
) -> Result<ergotree_ir::mir::expr::Expr, CompileError> {
    let parse = super::parser::parse(&source);
    dbg!(parse.debug_tree());
    if !parse.errors.is_empty() {
        return Err(CompileError::ParseError(parse.errors));
    }
    let syntax = parse.syntax();
    dbg!(&syntax);
    let root = ast::Root::cast(syntax).unwrap();
    let hir = hir::lower(root)?;
    dbg!(&hir);
    let binder = Binder::new(env);
    let bind = binder.bind(hir)?;
    let typed = assign_type(bind)?;
    dbg!(typed.debug_tree());
    let mir = mir::lower::lower(typed)?;
    let res = ergotree_ir::type_check::type_check(mir)?;
    Ok(res)
}

/// Compiles given source code to [`ErgoTree`], or returns an error
pub fn compile(source: &str, env: ScriptEnv) -> Result<ErgoTree, CompileError> {
    let expr = compile_expr(source, env)?;
    Ok(expr.into())
}

#[cfg(test)]
fn check(input: &str, expected_tree: expect_test::Expect) {
    let res = compile(input, ScriptEnv::new());

    let expected_out = res
        .map(|tree| tree.debug_tree())
        .unwrap_or_else(|e| e.pretty_desc(input));
    expected_tree.assert_eq(&expected_out);
}

#[cfg(test)]
mod tests {
    use super::*;
    use expect_test::expect;

    #[test]
    fn test_height() {
        check(
            "HEIGHT",
            expect![[r#"
            ErgoTree {
                header: ErgoTreeHeader(
                    16,
                ),
                tree: Ok(
                    ParsedTree {
                        constants: [],
                        root: Ok(
                            GlobalVars(
                                Height,
                            ),
                        ),
                    },
                ),
            }"#]],
        );
    }

    #[test]
    fn test_parser_error() {
        check(
            "HSB.HEIGHT",
            expect![[r#"
            error: expected ‘+’, ‘-’, ‘*’, ‘/’, ‘val’, number, identifier, ‘-’ or ‘(’, but found an unrecognized token
            line: 1
            HSB.HEIGHT
              ^^"#]],
        );
    }
}