mirror of
https://github.com/erg-lang/erg.git
synced 2025-10-03 05:54:33 +00:00
723 lines
23 KiB
Rust
723 lines
23 KiB
Rust
//! provides common components for error handling.
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//!
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//! エラー処理に関する汎用的なコンポーネントを提供する
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use std::cmp;
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use std::fmt;
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use std::io::{stderr, BufWriter, Write as _};
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use crate::config::Input;
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use crate::style::Attribute;
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use crate::style::Characters;
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use crate::style::Color;
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use crate::style::StyledStr;
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use crate::style::StyledString;
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use crate::style::StyledStrings;
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use crate::style::Theme;
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use crate::style::THEME;
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use crate::traits::{Locational, Stream};
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use crate::{impl_display_from_debug, switch_lang};
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/// ErrorKindと言っているが、ErrorだけでなくWarning, Exceptionも含まれる
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/// Numbering of this is not specifically related to ErrFmt.errno().
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#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
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#[repr(u8)]
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pub enum ErrorKind {
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/* compile errors */
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AssignError = 0,
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AttributeError = 1,
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BytecodeError = 2,
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CompilerSystemError = 3,
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EnvironmentError = 4,
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FeatureError = 5,
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ImportError = 6,
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IndentationError = 7,
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NameError = 8,
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NotImplementedError = 9,
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PatternError = 10,
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SyntaxError = 11,
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TabError = 12,
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TypeError = 13,
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UnboundLocalError = 14,
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PurityError = 15,
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HasEffect = 16,
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MoveError = 17,
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NotConstExpr = 18,
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InheritanceError = 19,
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VisibilityError = 20,
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MethodError = 21,
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DummyError = 22,
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/* compile warnings */
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AttributeWarning = 60,
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CastWarning = 61,
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DeprecationWarning = 62,
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FutureWarning = 63,
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ImportWarning = 64,
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PendingDeprecationWarning = 65,
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SyntaxWarning = 66,
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TypeWarning = 67,
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NameWarning = 68,
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UnusedWarning = 69,
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Warning = 70,
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/* runtime errors */
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ArithmeticError = 100,
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AssertionError = 101,
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BlockingIOError = 102,
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BrokenPipeError = 103,
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BufferError = 104,
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ChildProcessError = 105,
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ConnectionAbortedError = 106,
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ConnectionError = 107,
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ConnectionRefusedError = 108,
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ConnectionResetError = 109,
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EOFError = 110,
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FileExistsError = 111,
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FileNotFoundError = 112,
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IndexError = 113,
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InterruptedError = 114,
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IoError = 115,
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IsADirectoryError = 116,
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KeyError = 117,
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LookupError = 118,
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MemoryError = 119,
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ModuleNotFoundError = 120,
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NotADirectoryError = 121,
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OSError = 122,
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OverflowError = 123,
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PermissionError = 124,
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ProcessLookupError = 125,
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RecursionError = 126,
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ReferenceError = 127,
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RuntimeAttributeError = 128,
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RuntimeError = 129,
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RuntimeTypeError = 130,
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RuntimeUnicodeError = 131,
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TimeoutError = 132,
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UnicodeError = 133,
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UserError = 134,
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ValueError = 135,
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VMSystemError = 136,
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WindowsError = 137,
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ZeroDivisionError = 138,
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/* runtime warnings */
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BytesWarning = 180,
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ResourceWarning = 181,
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RuntimeWarning = 182,
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UnicodeWarning = 183,
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UserWarning = 184,
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/* exceptions */
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BaseException = 200,
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Exception = 201,
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GeneratorExit = 202,
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KeyboardInterrupt = 203,
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StopAsyncIteration = 204,
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StopIteration = 205,
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SystemExit = 206,
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UserException = 207,
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}
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use ErrorKind::*;
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impl_display_from_debug!(ErrorKind);
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impl ErrorKind {
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pub fn is_warning(&self) -> bool {
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(60..=100).contains(&(*self as u8)) || (180..=200).contains(&(*self as u8))
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}
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pub fn is_error(&self) -> bool {
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(0..=59).contains(&(*self as u8)) || (100..=179).contains(&(*self as u8))
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}
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pub fn is_exception(&self) -> bool {
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(200..=255).contains(&(*self as u8))
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}
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}
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impl From<&str> for ErrorKind {
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fn from(s: &str) -> ErrorKind {
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match s {
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"AssignError" => Self::AssignError,
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"AttributeError" => Self::AttributeError,
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"BytecodeError" => Self::BytecodeError,
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"CompilerSystemError" => Self::CompilerSystemError,
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"EnvironmentError" => Self::EnvironmentError,
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"FeatureError" => Self::FeatureError,
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"ImportError" => Self::ImportError,
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"IndentationError" => Self::IndentationError,
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"NameError" => Self::NameError,
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"NotImplementedError" => Self::NotImplementedError,
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"PatternError" => Self::PatternError,
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"SyntaxError" => Self::SyntaxError,
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"TabError" => Self::TabError,
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"TypeError" => Self::TypeError,
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"UnboundLocalError" => Self::UnboundLocalError,
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"HasEffect" => Self::HasEffect,
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"PurityError" => Self::PurityError,
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"MoveError" => Self::MoveError,
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"AttributeWarning" => Self::AttributeWarning,
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"CastWarning" => Self::CastWarning,
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"DeprecationWarning" => Self::DeprecationWarning,
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"FutureWarning" => Self::FutureWarning,
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"ImportWarning" => Self::ImportWarning,
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"PendingDeprecationWarning" => Self::PendingDeprecationWarning,
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"SyntaxWarning" => Self::SyntaxWarning,
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"TypeWarning" => Self::TypeWarning,
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"NameWarning" => Self::NameWarning,
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"UnusedWarning" => Self::UnusedWarning,
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"Warning" => Self::Warning,
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"ArithmeticError" => Self::ArithmeticError,
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"AssertionError" => Self::AssertionError,
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"BlockingIOError" => Self::BlockingIOError,
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"BrokenPipeError" => Self::BrokenPipeError,
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"BufferError" => Self::BufferError,
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"ChildProcessError" => Self::ChildProcessError,
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"ConnectionAbortedError" => Self::ConnectionAbortedError,
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"ConnectionError" => Self::ConnectionError,
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"ConnectionRefusedError" => Self::ConnectionRefusedError,
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"ConnectionResetError" => Self::ConnectionResetError,
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"EOFError" => Self::EOFError,
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"FileExistsError" => Self::FileExistsError,
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"FileNotFoundError" => Self::FileNotFoundError,
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"IndexError" => Self::IndexError,
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"InterruptedError" => Self::InterruptedError,
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"IoError" => Self::IoError,
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"IsADirectoryError" => Self::IsADirectoryError,
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"KeyError" => Self::KeyError,
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"LookupError" => Self::LookupError,
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"MemoryError" => Self::MemoryError,
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"ModuleNotFoundError" => Self::ModuleNotFoundError,
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"NotADirectoryError" => Self::NotADirectoryError,
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"OSError" => Self::OSError,
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"OverflowError" => Self::OverflowError,
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"PermissionError" => Self::PermissionError,
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"ProcessLookupError" => Self::ProcessLookupError,
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"RecursionError" => Self::RecursionError,
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"ReferenceError" => Self::ReferenceError,
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"RuntimeAttributeError" => Self::RuntimeAttributeError,
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"RuntimeError" => Self::RuntimeError,
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"RuntimeTypeError" => Self::RuntimeTypeError,
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"RuntimeUnicodeError" => Self::RuntimeUnicodeError,
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"TimeoutError" => Self::TimeoutError,
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"UnicodeError" => Self::UnicodeError,
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"UserError" => Self::UserError,
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"ValueError" => Self::ValueError,
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"VMSystemError" => Self::VMSystemError,
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"WindowsError" => Self::WindowsError,
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"ZeroDivisionError" => Self::ZeroDivisionError,
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"BytesWarning" => Self::BytesWarning,
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"ResourceWarning" => Self::ResourceWarning,
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"RuntimeWarning" => Self::RuntimeWarning,
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"UnicodeWarning" => Self::UnicodeWarning,
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"UserWarning" => Self::UserWarning,
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"BaseException" => Self::BaseException,
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"Exception" => Self::Exception,
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"GeneratorExit" => Self::GeneratorExit,
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"KeyboardInterrupt" => Self::KeyboardInterrupt,
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"StopAsyncIteration" => Self::StopAsyncIteration,
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"StopIteration" => Self::StopIteration,
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"SystemExit" => Self::SystemExit,
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"UserException" => Self::UserException,
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_ => Self::UserError,
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}
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}
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}
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///
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/// Points the location (of an error) in a code.
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/// The beginning and end of each row and column where the error occurred.
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/// Basically, the beginning and end of each row and column where the error occurred is kept.
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///
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#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Default)]
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pub enum Location {
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///
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/// Location used for basic errors
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/// ```erg
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/// // erg
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/// a = 1
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/// a = 2
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/// // Value assigned to the structure
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/// Location::Range {
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/// ln_begin: 2,
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/// col_begin: 0,
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/// ln_end: 2,
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/// col_end: 1,
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/// }
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/// ```
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///
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Range {
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ln_begin: usize,
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col_begin: usize,
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ln_end: usize,
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col_end: usize,
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},
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/// Used for loss of location information when desugared.
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/// If there are guaranteed to be multiple rows
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LineRange(usize, usize),
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/// Used when Location information is lost when desugared
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/// If it is guaranteed to be a single line
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Line(usize),
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/// Used by default in case of loss of Location information
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#[default]
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Unknown,
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}
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impl Location {
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pub fn concat<L: Locational, R: Locational>(l: &L, r: &R) -> Self {
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match (l.ln_begin(), l.col_begin(), r.ln_end(), r.col_end()) {
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(Some(lb), Some(cb), Some(le), Some(ce)) => Self::range(lb, cb, le, ce),
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(Some(lb), _, Some(le), _) => Self::LineRange(lb, le),
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(Some(l), _, _, _) | (_, _, Some(l), _) => Self::Line(l),
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_ => Self::Unknown,
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}
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}
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pub const fn range(ln_begin: usize, col_begin: usize, ln_end: usize, col_end: usize) -> Self {
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Self::Range {
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ln_begin,
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col_begin,
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ln_end,
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col_end,
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}
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}
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pub const fn ln_begin(&self) -> Option<usize> {
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match self {
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Self::Range { ln_begin, .. } | Self::LineRange(ln_begin, _) | Self::Line(ln_begin) => {
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Some(*ln_begin)
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}
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Self::Unknown => None,
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}
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}
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pub const fn ln_end(&self) -> Option<usize> {
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match self {
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Self::Range { ln_end, .. } | Self::LineRange(ln_end, _) | Self::Line(ln_end) => {
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Some(*ln_end)
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}
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Self::Unknown => None,
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}
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}
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pub const fn col_begin(&self) -> Option<usize> {
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match self {
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Self::Range { col_begin, .. } => Some(*col_begin),
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_ => None,
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}
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}
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pub const fn col_end(&self) -> Option<usize> {
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match self {
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Self::Range { col_end, .. } => Some(*col_end),
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_ => None,
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}
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}
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}
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#[allow(clippy::too_many_arguments)]
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fn format_context<E: ErrorDisplay + ?Sized>(
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e: &E,
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ln_begin: usize,
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ln_end: usize,
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col_begin: usize,
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col_end: usize,
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err_color: Color,
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gutter_color: Color,
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// for formatting points
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chars: &Characters,
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// kinds of error for specify the color
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mark: char,
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sub_msg: &[String],
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hint: Option<&String>,
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) -> String {
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let mark = mark.to_string();
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let codes = if e.input().is_repl() {
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vec![e.input().reread()]
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} else {
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e.input().reread_lines(ln_begin, ln_end)
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};
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let mut context = StyledStrings::default();
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let final_step = ln_end - ln_begin;
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let max_digit = ln_end.to_string().len();
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let (vbreak, vbar) = chars.gutters();
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let offset = format!("{} {} ", &" ".repeat(max_digit), vbreak);
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for (i, lineno) in (ln_begin..=ln_end).enumerate() {
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context.push_str_with_color(
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&format!("{:<max_digit$} {vbar} ", lineno, vbar = vbar),
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gutter_color,
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);
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context.push_str(&codes[i]);
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context.push_str("\n");
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context.push_str_with_color(&offset, gutter_color);
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if i == 0 && i == final_step {
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context.push_str(&" ".repeat(col_begin));
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context.push_str_with_color(
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&mark.repeat(cmp::max(1, col_end.saturating_sub(col_begin))),
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err_color,
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);
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} else if i == 0 {
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context.push_str(&" ".repeat(col_begin));
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context.push_str_with_color(
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&mark.repeat(cmp::max(1, codes[i].len().saturating_sub(col_begin))),
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err_color,
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);
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} else if i == final_step {
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context.push_str_with_color(&mark.repeat(col_end), err_color);
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} else {
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context.push_str_with_color(&mark.repeat(cmp::max(1, codes[i].len())), err_color);
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}
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context.push_str("\n");
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}
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let msg_num = sub_msg.len().saturating_sub(1);
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for (i, msg) in sub_msg.iter().enumerate() {
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context.push_str_with_color(&offset, gutter_color);
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context.push_str(&" ".repeat(col_end - 1));
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if i == msg_num && hint.is_none() {
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context.push_str_with_color(&chars.left_bottom_line(), err_color);
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} else {
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context.push_str_with_color(&chars.left_cross(), err_color);
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}
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context.push_str(msg);
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context.push_str("\n")
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}
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if let Some(hint) = hint {
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context.push_str_with_color(&offset, gutter_color);
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context.push_str(&" ".repeat(col_end - 1));
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context.push_str_with_color(&chars.left_bottom_line(), err_color);
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context.push_str(hint);
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context.push_str("\n")
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}
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context.to_string() + "\n"
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}
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#[derive(Debug, Clone, PartialEq, Eq, Hash)]
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pub struct SubMessage {
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pub loc: Location,
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msg: Vec<String>,
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hint: Option<String>,
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}
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impl SubMessage {
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pub fn ambiguous_new(loc: Location, msg: Vec<String>, hint: Option<String>) -> Self {
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Self { loc, msg, hint }
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}
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pub fn only_loc(loc: Location) -> Self {
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Self {
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loc,
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msg: Vec::new(),
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hint: None,
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}
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}
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pub fn set_hint<S: Into<String>>(&mut self, hint: S) {
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self.hint = Some(hint.into());
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}
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pub fn get_hint(self) -> Option<String> {
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self.hint
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}
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fn format_code_and_pointer<E: ErrorDisplay + ?Sized>(
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&self,
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e: &E,
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err_color: Color,
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gutter_color: Color,
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mark: char,
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chars: &Characters,
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) -> String {
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match self.loc {
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Location::Range {
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ln_begin,
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col_begin,
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ln_end,
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col_end,
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} => format_context(
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e,
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ln_begin,
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ln_end,
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col_begin,
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col_end,
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err_color,
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gutter_color,
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chars,
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mark,
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&self.msg,
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self.hint.as_ref(),
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),
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Location::LineRange(ln_begin, ln_end) => {
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let input = e.input();
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let (vbreak, vbar) = chars.gutters();
|
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let mut cxt = StyledStrings::default();
|
||
let codes = if input.is_repl() {
|
||
vec![input.reread()]
|
||
} else {
|
||
input.reread_lines(ln_begin, ln_end)
|
||
};
|
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let mark = mark.to_string();
|
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for (i, lineno) in (ln_begin..=ln_end).enumerate() {
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cxt.push_str_with_color(&format!("{lineno} {vbar} "), gutter_color);
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cxt.push_str(&codes[i]);
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||
cxt.push_str("\n");
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cxt.push_str_with_color(
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&format!("{} {}", &" ".repeat(lineno.to_string().len()), vbreak),
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gutter_color,
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);
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cxt.push_str(&" ".repeat(lineno.to_string().len()));
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cxt.push_str_with_color(&mark.repeat(cmp::max(1, codes[i].len())), err_color);
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cxt.push_str("\n");
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}
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cxt.push_str("\n");
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cxt.to_string()
|
||
}
|
||
Location::Line(lineno) => {
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||
let input = e.input();
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||
let (_, vbar) = chars.gutters();
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||
let code = if input.is_repl() {
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||
input.reread()
|
||
} else {
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||
input.reread_lines(lineno, lineno).remove(0)
|
||
};
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||
let mut cxt = StyledStrings::default();
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||
cxt.push_str_with_color(&format!(" {lineno} {} ", vbar), gutter_color);
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||
cxt.push_str(&code);
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||
cxt.push_str("\n\n");
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||
cxt.to_string()
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||
}
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||
Location::Unknown => match e.input() {
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||
Input::File(_) => "\n".to_string(),
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||
|
||
other => {
|
||
let (_, vbar) = chars.gutters();
|
||
let mut cxt = StyledStrings::default();
|
||
cxt.push_str_with_color(&format!(" ? {}", vbar), gutter_color);
|
||
cxt.push_str(&other.reread());
|
||
cxt.push_str("\n\n");
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||
cxt.to_string()
|
||
}
|
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},
|
||
}
|
||
}
|
||
}
|
||
|
||
/// In Erg, common parts used by error.
|
||
/// Must be wrap when to use.
|
||
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
|
||
pub struct ErrorCore {
|
||
pub sub_messages: Vec<SubMessage>,
|
||
pub main_message: String,
|
||
pub errno: usize,
|
||
pub kind: ErrorKind,
|
||
pub loc: Location,
|
||
theme: Theme,
|
||
}
|
||
|
||
impl ErrorCore {
|
||
pub fn new<S: Into<String>>(
|
||
sub_messages: Vec<SubMessage>,
|
||
main_message: S,
|
||
errno: usize,
|
||
kind: ErrorKind,
|
||
loc: Location,
|
||
) -> Self {
|
||
Self {
|
||
sub_messages,
|
||
main_message: main_message.into(),
|
||
errno,
|
||
kind,
|
||
loc,
|
||
theme: THEME,
|
||
}
|
||
}
|
||
|
||
pub fn dummy(errno: usize) -> Self {
|
||
Self::new(
|
||
vec![SubMessage::only_loc(Location::Line(errno as usize))],
|
||
"<dummy>",
|
||
errno,
|
||
DummyError,
|
||
Location::Line(errno as usize),
|
||
)
|
||
}
|
||
|
||
pub fn unreachable(fn_name: &str, line: u32) -> Self {
|
||
Self::bug(line as usize, Location::Line(line as usize), fn_name, line)
|
||
}
|
||
|
||
pub fn bug(errno: usize, loc: Location, fn_name: &str, line: u32) -> Self {
|
||
const URL: StyledStr = StyledStr::new(
|
||
"https://github.com/erg-lang/erg",
|
||
Some(Color::White),
|
||
Some(Attribute::Underline),
|
||
);
|
||
|
||
let m_msg = switch_lang!(
|
||
"japanese" => format!("これはErgのバグです、開発者に報告して下さい({URL})\n{fn_name}:{line}より発生"),
|
||
"simplified_chinese" => format!("这是Erg的bug，请报告给{URL}\n原因来自: {fn_name}:{line}"),
|
||
"traditional_chinese" => format!("这是Erg的bug，请报告给{URL}\n原因来自: {fn_name}:{line}"),
|
||
"english" => format!("this is a bug of Erg, please report it to {URL}\ncaused from: {fn_name}:{line}"),
|
||
);
|
||
Self::new(
|
||
vec![SubMessage::only_loc(loc)],
|
||
&m_msg,
|
||
errno,
|
||
CompilerSystemError,
|
||
loc,
|
||
)
|
||
}
|
||
|
||
pub fn fmt_header(&self, kind: StyledString, caused_by: &str, input: &str) -> String {
|
||
let loc = match self.loc {
|
||
Location::Range {
|
||
ln_begin, ln_end, ..
|
||
} if ln_begin == ln_end => format!(", line {ln_begin}"),
|
||
Location::Range {
|
||
ln_begin, ln_end, ..
|
||
}
|
||
| Location::LineRange(ln_begin, ln_end) => format!(", line {ln_begin}..{ln_end}"),
|
||
Location::Line(lineno) => format!(", line {lineno}"),
|
||
Location::Unknown => "".to_string(),
|
||
};
|
||
format!("{kind}: File {input}{loc}{caused_by}",)
|
||
}
|
||
}
|
||
|
||
/// format:
|
||
/// ```txt
|
||
/// Error[#{.errno}]: File {file}, line {.loc (as line)}, in {.caused_by}
|
||
///
|
||
/// {.loc (as line)}| {src}
|
||
/// {offset} : {pointer}
|
||
/// {offset} : {sub_msgs}
|
||
/// {offset} : {.hint}
|
||
///
|
||
/// {.kind}: {.desc}
|
||
///
|
||
/// ```
|
||
///
|
||
/// example:
|
||
/// ```txt
|
||
/// Error[#2223]: File <stdin>, line 1, in <module>
|
||
///
|
||
/// 1 │ 100 = i
|
||
/// · ---
|
||
/// · │─ sub_msg1: first sub message here
|
||
/// · │─ sub_msg2: second sub message here
|
||
/// · ╰─ hint: hint message here
|
||
///
|
||
/// SyntaxError: cannot assign to 100
|
||
///
|
||
/// ```
|
||
pub trait ErrorDisplay {
|
||
fn core(&self) -> &ErrorCore;
|
||
fn input(&self) -> &Input;
|
||
/// The block name the error caused.
|
||
/// This will be None if the error occurred before semantic analysis.
|
||
fn caused_by(&self) -> &str;
|
||
/// the previous error that caused this error.
|
||
fn ref_inner(&self) -> Option<&Self>;
|
||
|
||
fn write_to_stderr(&self) {
|
||
let mut stderr = stderr();
|
||
self.write_to(&mut stderr)
|
||
}
|
||
|
||
fn write_to<W: std::io::Write>(&self, w: &mut W) {
|
||
let mut writer = BufWriter::new(w);
|
||
writer.write_all(self.show().as_bytes()).unwrap();
|
||
writer.flush().unwrap();
|
||
if let Some(inner) = self.ref_inner() {
|
||
inner.write_to_stderr()
|
||
}
|
||
}
|
||
|
||
fn show(&self) -> String {
|
||
let core = self.core();
|
||
let ((color, mark), kind) = if core.kind.is_error() {
|
||
(core.theme.error(), "Error")
|
||
} else if core.kind.is_warning() {
|
||
(core.theme.warning(), "Warning")
|
||
} else {
|
||
(core.theme.exception(), "Exception")
|
||
};
|
||
let (gutter_color, chars) = core.theme.characters();
|
||
let kind = StyledString::new(
|
||
&chars.error_kind_format(kind, core.errno),
|
||
Some(color),
|
||
Some(Attribute::Bold),
|
||
);
|
||
let mut msg = String::new();
|
||
msg += &core.fmt_header(kind, self.caused_by(), self.input().enclosed_name());
|
||
msg += "\n\n";
|
||
for sub_msg in &core.sub_messages {
|
||
msg += &sub_msg.format_code_and_pointer(self, color, gutter_color, mark, chars);
|
||
}
|
||
msg += &core.main_message;
|
||
msg += "\n\n";
|
||
msg
|
||
}
|
||
|
||
/// for fmt::Display
|
||
fn format(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||
let core = self.core();
|
||
let ((color, mark), kind) = if core.kind.is_error() {
|
||
(core.theme.error(), "Error")
|
||
} else if core.kind.is_warning() {
|
||
(core.theme.warning(), "Warning")
|
||
} else {
|
||
(core.theme.exception(), "Exception")
|
||
};
|
||
let (gutter_color, chars) = core.theme.characters();
|
||
let kind = StyledString::new(
|
||
&chars.error_kind_format(kind, core.errno),
|
||
Some(color),
|
||
Some(Attribute::Bold),
|
||
);
|
||
write!(
|
||
f,
|
||
"{}\n\n",
|
||
core.fmt_header(kind, self.caused_by(), self.input().enclosed_name())
|
||
)?;
|
||
for sub_msg in &core.sub_messages {
|
||
write!(
|
||
f,
|
||
"{}",
|
||
&sub_msg.format_code_and_pointer(self, color, gutter_color, mark, chars)
|
||
)?;
|
||
}
|
||
write!(f, "{}\n\n", core.main_message)?;
|
||
if let Some(inner) = self.ref_inner() {
|
||
inner.format(f)
|
||
} else {
|
||
Ok(())
|
||
}
|
||
}
|
||
}
|
||
|
||
#[macro_export]
|
||
macro_rules! impl_display_and_error {
|
||
($Strc: ident) => {
|
||
impl std::fmt::Display for $Strc {
|
||
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
|
||
$crate::error::ErrorDisplay::format(self, f)
|
||
}
|
||
}
|
||
|
||
impl std::error::Error for $Strc {}
|
||
};
|
||
}
|
||
|
||
pub trait MultiErrorDisplay<Item: ErrorDisplay>: Stream<Item> {
|
||
fn fmt_all_stderr(&self) {
|
||
for err in self.iter() {
|
||
err.write_to_stderr();
|
||
}
|
||
}
|
||
|
||
fn fmt_all(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
|
||
for err in self.iter() {
|
||
err.format(f)?;
|
||
}
|
||
write!(f, "")
|
||
}
|
||
}
|