babbel_yaml 0.1.1

Fast, modular YAML 1.2 parser and emitter with anchors, aliases, and tags
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//! Module: parser/utils/indentation.rs
//!
//! Shared token-based indentation and whitespace validation utilities
//! used by the document parser. This is the canonical home for
//! indentation rules; document helpers should delegate here.

use crate::parser::utils::context::ParsingContext;
use crate::parser::token_stream::TokenStream;

/// Token-based indentation validation using `TokenStream`.
///
/// At the moment this function is intentionally minimal and only set up as a
/// customization point; it will be extended to enforce stricter
/// indentation/whitespace rules (using `ParsingContext`) as we work through
/// the official YAML test suite false positives.
pub(crate) fn validate_indentation_tokens(
    stream: &TokenStream,
    ctx: &ParsingContext,
) -> crate::parser::ParseResult<()> {
    use crate::parser::lexer::Token;

    if ctx.in_flow {
        return Ok(());
    }
    if !ctx.should_validate_tab_indentation() {
        return Ok(());
    }
    // At token level we don't mutate or inspect raw source; validation occurs
    // at call sites that can safely snapshot and peek the underlying source.
    // Keep this as a no-op hook for future token-encoded indentation metadata.
    if let Some(Token::Indent(_)) = stream.current() {
        return Ok(());
    }
    Ok(())
}