Trait lrpar::NonStreamingLexer[−][src]

pub trait NonStreamingLexer<'input, StorageT: Hash + PrimInt + Unsigned>: Lexer<StorageT> {
    fn span_str(&self, span: Span) -> &'input str;

    fn span_lines_str(&self, span: Span) -> &'input str;

    fn line_col(&self, span: Span) -> ((usize, usize), (usize, usize));
}
Expand description

A NonStreamingLexer is one that takes input in one go, and is then able to hand out substrings to that input and calculate line and column numbers from a Span.

Required methods

fn span_str(&self, span: Span) -> &'input str[src]

Expand description

Return the user input associated with a Span.

The Span must be well formed:

  • The start/end byte indexes must be valid UTF-8 character indexes.
  • The end byte index must not exceed the input’s length. If these requirements are not respected this function may panic or return unexpected portions of the input.

fn span_lines_str(&self, span: Span) -> &'input str[src]

Expand description

Return the lines containing the input at span (including all the text on the lines that span starts and ends on).

The Span must be well formed:

  • The start/end byte indexes must be valid UTF-8 character indexes.
  • The end byte index must not exceed the input’s length. If these requirements are not respected this function may panic or return unexpected portions of the input.

fn line_col(&self, span: Span) -> ((usize, usize), (usize, usize))[src]

Expand description

Return ((start line, start column), (end line, end column)) for span. Note that column characters (not bytes) are returned.

The Span must be well formed:

  • The start/end byte indexes must be valid UTF-8 character indexes.
  • The end byte index must not exceed the input’s length. If these requirements are not respected this function may panic or return unexpected portions of the input.
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Implementors

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