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Use token::Lit in ast::ExprKind::Lit.

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Instead of `ast::Lit`.

Literal lowering now happens at two different times. Expression literals
are lowered when HIR is crated. Attribute literals are lowered during
parsing.

This commit changes the language very slightly. Some programs that used
to not compile now will compile. This is because some invalid literals
that are removed by `cfg` or attribute macros will no longer trigger
errors. See this comment for more details:
https://github.com/rust-lang/rust/pull/102944#issuecomment-1277476773
This commit is contained in:
Nicholas Nethercote
2022-10-10 13:40:56 +11:00
parent 01760265cb
commit 358a603f11
45 changed files with 701 additions and 581 deletions
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90
compiler/rustc_parse/src/errors.rs
View File

@@ -304,61 +304,6 @@ pub(crate) struct FloatLiteralRequiresIntegerPart {
pub correct: String,
}
#[derive(Diagnostic)]
#[diag(parser_invalid_int_literal_width)]
#[help]
pub(crate) struct InvalidIntLiteralWidth {
#[primary_span]
pub span: Span,
pub width: String,
}
#[derive(Diagnostic)]
#[diag(parser_invalid_num_literal_base_prefix)]
#[note]
pub(crate) struct InvalidNumLiteralBasePrefix {
#[primary_span]
#[suggestion(applicability = "maybe-incorrect", code = "{fixed}")]
pub span: Span,
pub fixed: String,
}
#[derive(Diagnostic)]
#[diag(parser_invalid_num_literal_suffix)]
#[help]
pub(crate) struct InvalidNumLiteralSuffix {
#[primary_span]
#[label]
pub span: Span,
pub suffix: String,
}
#[derive(Diagnostic)]
#[diag(parser_invalid_float_literal_width)]
#[help]
pub(crate) struct InvalidFloatLiteralWidth {
#[primary_span]
pub span: Span,
pub width: String,
}
#[derive(Diagnostic)]
#[diag(parser_invalid_float_literal_suffix)]
#[help]
pub(crate) struct InvalidFloatLiteralSuffix {
#[primary_span]
#[label]
pub span: Span,
pub suffix: String,
}
#[derive(Diagnostic)]
#[diag(parser_int_literal_too_large)]
pub(crate) struct IntLiteralTooLarge {
#[primary_span]
pub span: Span,
}
#[derive(Diagnostic)]
#[diag(parser_missing_semicolon_before_array)]
pub(crate) struct MissingSemicolonBeforeArray {
@@ -740,41 +685,6 @@ pub(crate) struct InvalidInterpolatedExpression {
pub span: Span,
}
#[derive(Diagnostic)]
#[diag(parser_hexadecimal_float_literal_not_supported)]
pub(crate) struct HexadecimalFloatLiteralNotSupported {
#[primary_span]
#[label(parser_not_supported)]
pub span: Span,
}
#[derive(Diagnostic)]
#[diag(parser_octal_float_literal_not_supported)]
pub(crate) struct OctalFloatLiteralNotSupported {
#[primary_span]
#[label(parser_not_supported)]
pub span: Span,
}
#[derive(Diagnostic)]
#[diag(parser_binary_float_literal_not_supported)]
pub(crate) struct BinaryFloatLiteralNotSupported {
#[primary_span]
#[label(parser_not_supported)]
pub span: Span,
}
#[derive(Diagnostic)]
#[diag(parser_invalid_literal_suffix)]
pub(crate) struct InvalidLiteralSuffix {
#[primary_span]
#[label]
pub span: Span,
// FIXME(#100717)
pub kind: String,
pub suffix: Symbol,
}
#[derive(Diagnostic)]
#[diag(parser_invalid_literal_suffix_on_tuple_index)]
pub(crate) struct InvalidLiteralSuffixOnTupleIndex {