1 files changed, 151 insertions, 0 deletions
diff --git a/compiler/rustc_builtin_macros/messages.ftl b/compiler/rustc_builtin_macros/messages.ftl
new file mode 100644
index 000000000..83dc1ac50
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+++ b/compiler/rustc_builtin_macros/messages.ftl
@@ -0,0 +1,151 @@
+builtin_macros_requires_cfg_pattern =
+    macro requires a cfg-pattern as an argument
+    .label = cfg-pattern required
+
+builtin_macros_expected_one_cfg_pattern = expected 1 cfg-pattern
+
+builtin_macros_alloc_error_must_be_fn = alloc_error_handler must be a function
+
+builtin_macros_assert_requires_boolean = macro requires a boolean expression as an argument
+    .label = boolean expression required
+
+builtin_macros_assert_requires_expression = macro requires an expression as an argument
+    .suggestion = try removing semicolon
+
+builtin_macros_assert_missing_comma = unexpected string literal
+    .suggestion = try adding a comma
+
+builtin_macros_cfg_accessible_unspecified_path = `cfg_accessible` path is not specified
+builtin_macros_cfg_accessible_multiple_paths = multiple `cfg_accessible` paths are specified
+builtin_macros_cfg_accessible_literal_path = `cfg_accessible` path cannot be a literal
+builtin_macros_cfg_accessible_has_args = `cfg_accessible` path cannot accept arguments
+
+builtin_macros_cfg_accessible_indeterminate = cannot determine whether the path is accessible or not
+
+builtin_macros_concat_bytestr = cannot concatenate a byte string literal
+
+builtin_macros_concat_missing_literal = expected a literal
+    .note = only literals (like `"foo"`, `-42` and `3.14`) can be passed to `concat!()`
+
+builtin_macros_concat_bytes_missing_literal = expected a byte literal
+    .note = only byte literals (like `b"foo"`, `b's'` and `[3, 4, 5]`) can be passed to `concat_bytes!()`
+
+builtin_macros_concat_bytes_invalid = cannot concatenate {$lit_kind} literals
+    .byte_char = try using a byte character
+    .byte_str = try using a byte string
+    .number_array = try wrapping the number in an array
+
+builtin_macros_concat_bytes_oob = numeric literal is out of bounds
+
+builtin_macros_concat_bytes_non_u8 = numeric literal is not a `u8`
+
+builtin_macros_concat_bytes_array = cannot concatenate doubly nested array
+    .note = byte strings are treated as arrays of bytes
+    .help = try flattening the array
+
+builtin_macros_concat_bytes_bad_repeat = repeat count is not a positive number
+
+builtin_macros_concat_idents_missing_args = `concat_idents!()` takes 1 or more arguments
+builtin_macros_concat_idents_missing_comma = `concat_idents!()` expecting comma
+builtin_macros_concat_idents_ident_args = `concat_idents!()` requires ident args
+
+builtin_macros_bad_derive_target = `derive` may only be applied to `struct`s, `enum`s and `union`s
+    .label = not applicable here
+    .label2 = not a `struct`, `enum` or `union`
+
+builtin_macros_unexpected_lit = expected path to a trait, found literal
+    .label = not a trait
+    .str_lit = try using `#[derive({$sym})]`
+    .other = for example, write `#[derive(Debug)]` for `Debug`
+
+builtin_macros_derive_path_args_list = traits in `#[derive(...)]` don't accept arguments
+    .suggestion = remove the arguments
+
+builtin_macros_derive_path_args_value = traits in `#[derive(...)]` don't accept values
+    .suggestion = remove the value
+
+builtin_macros_derive_macro_call = `derive` cannot be used on items with type macros
+
+builtin_macros_cannot_derive_union = this trait cannot be derived for unions
+
+builtin_macros_no_default_variant = no default declared
+    .help = make a unit variant default by placing `#[default]` above it
+    .suggestion = make `{$ident}` default
+
+builtin_macros_multiple_defaults = multiple declared defaults
+    .label = first default
+    .additional = additional default
+    .note = only one variant can be default
+    .suggestion = make `{$ident}` default
+
+builtin_macros_non_unit_default = the `#[default]` attribute may only be used on unit enum variants
+    .help = consider a manual implementation of `Default`
+
+builtin_macros_non_exhaustive_default = default variant must be exhaustive
+    .label = declared `#[non_exhaustive]` here
+    .help = consider a manual implementation of `Default`
+
+builtin_macros_multiple_default_attrs = multiple `#[default]` attributes
+    .note = only one `#[default]` attribute is needed
+    .label = `#[default]` used here
+    .label_again = `#[default]` used again here
+    .help = try removing {$only_one ->
+    [true] this
+    *[false] these
+    }
+
+builtin_macros_default_arg = `#[default]` attribute does not accept a value
+    .suggestion = try using `#[default]`
+
+builtin_macros_env_takes_args = `env!()` takes 1 or 2 arguments
+
+builtin_macros_env_not_defined = environment variable `{$var}` not defined at compile time
+    .cargo = Cargo sets build script variables at run time. Use `std::env::var("{$var}")` instead
+    .other = use `std::env::var("{$var}")` to read the variable at run time
+
+builtin_macros_format_requires_string = requires at least a format string argument
+
+builtin_macros_format_duplicate_arg = duplicate argument named `{$ident}`
+    .label1 = previously here
+    .label2 = duplicate argument
+
+builtin_macros_format_positional_after_named = positional arguments cannot follow named arguments
+    .label = positional arguments must be before named arguments
+    .named_args = named argument
+
+builtin_macros_format_string_invalid = invalid format string: {$desc}
+    .label = {$label1} in format string
+    .note = {$note}
+    .second_label = {$label}
+
+builtin_macros_sugg = consider using a positional formatting argument instead
+
+builtin_macros_format_no_arg_named = there is no argument named `{$name}`
+    .note = did you intend to capture a variable `{$name}` from the surrounding scope?
+    .note2 = to avoid ambiguity, `format_args!` cannot capture variables when the format string is expanded from a macro
+
+builtin_macros_format_unknown_trait = unknown format trait `{$ty}`
+    .note = the only appropriate formatting traits are:
+                                            - ``, which uses the `Display` trait
+                                            - `?`, which uses the `Debug` trait
+                                            - `e`, which uses the `LowerExp` trait
+                                            - `E`, which uses the `UpperExp` trait
+                                            - `o`, which uses the `Octal` trait
+                                            - `p`, which uses the `Pointer` trait
+                                            - `b`, which uses the `Binary` trait
+                                            - `x`, which uses the `LowerHex` trait
+                                            - `X`, which uses the `UpperHex` trait
+    .suggestion = use the `{$trait_name}` trait
+
+builtin_macros_format_unused_arg = {$named ->
+    [true] named argument
+    *[false] argument
+    } never used
+
+builtin_macros_format_unused_args = multiple unused formatting arguments
+    .label = multiple missing formatting specifiers
+
+builtin_macros_format_pos_mismatch = {$n} positional {$n ->
+    [one] argument
+    *[more] arguments
+    } in format string, but {$desc}