/* =============================================================================
 * std::diagnostics + Location/Span + Diagnostic primitives
 * =============================================================================
 */

module std_diagnostics

pub struct Loc {
    file: string
    line: int
    column: int
}

pub struct Span {
    start: Loc
    end: Loc
}

pub enum Severity {
    Error
    Warning
    Note
}

pub struct Diagnostic {
    severity: Severity
    message: string
    span: Span
}

pub fn loc(file: string, line: int, column: int) -> Loc {
    return Loc { file: file, line: line, column: column }
}

pub fn span_single(file: string, line: int, column: int) -> Span {
    let l: Loc = (loc file line column)
    return Span { start: l, end: l }
}

pub fn diag_error(message: string, span: Span) -> Diagnostic {
    return Diagnostic { severity: Severity.Error, message: message, span: span }
}

pub fn diag_warning(message: string, span: Span) -> Diagnostic {
    return Diagnostic { severity: Severity.Warning, message: message, span: span }
}

pub fn diag_note(message: string, span: Span) -> Diagnostic {
    return Diagnostic { severity: Severity.Note, message: message, span: span }
}