Parsing Expression Grammar (PEG) parser generator for Rust
Fix for libsyntax OneVector rename
Fix for FileName change in libsyntax API
#[pub] rule_name = ... syntax to pub rule_name = .... The old syntax is retained for backwards compatibility, but pub is now a reserved keyword and cannot be used as an identifier.#infix syntax for parsing binary infix expressions by precedence climbing.**<n,m>.x*<{count}> syntax for a repeat bounded by a Rust expression.#quiet<e> and #expected("msg") expressions for improved error reporting.as in use statements to match Rust syntax.& and ! expressions.peg = "0.3.0" with peg-syntax-ext = "0.4.0" in your Cargo.toml's [dependencies] section. The library name in #![plugin(peg_syntax_ext)] remains the same. Consider moving to the build script for compatibility with Rust stable.match_str variable has been removed in favor of the $(expr) syntax. Replace [0-9]+ { match_str.parse().unwrap() } with n:$([0-9]+) { n.parse().unwrap() }
start_pos and pos variables have been removed. Use #position as an expression, which returns a usize offset into the source string. Replace foo:x { Span(start_pos, pos, foo) } with start:#position foo:x end:#position { Span(start, end, foo) }
\u2029 unicode hex escape syntax has been removed, as it has long-since been removed from Rust. Use \u{2029} instead.foo{x,y} bounded-repeat syntax was replaced with foo*<x,y> to avoid a grammar ambiguity (#74).