Context-Free Syntax¶
The context-free syntax describes the more high-level syntactic structure of sentences in a language.
A context-free syntax contains a list of productions.
Elements of the right-hand side of a context-free production are pre-processed in a normalization step before parser generation that adds the LAYOUT?
symbol between any two symbols.
Context-free syntax has the form:
context-free syntax
$Production*
An example production rule:
context-free syntax
Block.Block = "{" Statement* "}"
SDF3 automatically allows for layout to be present between the symbols of a rule. This means that a fragment such as:
{
}
will still be recognized as a block (assuming that the newline and line-feed characters are defined as layout).
Last update:
October 1, 2024
Created: October 1, 2024
Created: October 1, 2024