Enum Language 

pub enum Language {
    Plaintext,
    Implicit,
    Other(String),
}

Language tag for text values.

Variants

• Plaintext: Explicitly plain text, from "..." string syntax. Use when the content is data/text, not code.

• Implicit: No language specified, from `...` or ``` without a language tag. The language can be inferred from schema context.

• Other: Explicit language tag, from rust`...` or ```rust syntax. Use when the language must be specified.

Schema Validation

Schema	Plaintext	Implicit	Other("rust")
.text (any)	✓	✓	✓
.text.plaintext	✓	✓ (coerce)	✗
.text.rust	✗	✓ (coerce)	✓

Implicit allows users to write `let a = 1;` when the schema already specifies .text.rust, without redundantly repeating the language.

Variants

Plaintext

Explicitly plain text (from "..." syntax).

This variant is rejected by schemas expecting a specific language like .text.rust. Use this when the content is data/text, not code.

Implicit

No language specified (from `...` without language tag).

Can be coerced to match the schema’s expected language. This allows users to write `let a = 1;` when the schema already specifies .text.rust.

Other(String)

Explicit language tag (from lang`...` syntax).

The string contains the language identifier (e.g., “rust”, “sql”, “email”).

Implementations

impl Language

pub fn new(s: impl Into<String>) -> Self

Create a Language from a string.

• Empty string or “plaintext” → Plaintext
• Other strings → Other

Note: This does NOT produce Implicit. Use Language::Implicit directly when parsing code syntax without a language tag.

pub fn as_str(&self) -> Option<&str>

Returns the language as a string slice, or None for Implicit.

pub fn is_plaintext(&self) -> bool

Returns true if this is the Plaintext variant.

pub fn is_implicit(&self) -> bool

Returns true if this is the Implicit variant.

pub fn is_compatible_with(&self, expected: &Language) -> bool

Returns true if this language can be coerced to the expected language.

Coercion Rules

• Implicit can be coerced to any language (it’s “infer from schema”)
• Any language matches an Implicit expectation (schema says “any”)
• Otherwise, languages must match exactly

pub fn is_other(&self, arg: &str) -> bool

Trait Implementations

impl Clone for Language

fn clone(&self) -> Language

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Language

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Language

fn default() -> Language

Returns the “default value” for a type.

impl Hash for Language

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Language

fn eq(&self, other: &Language) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for Language

impl StructuralPartialEq for Language