diff options
Diffstat (limited to 'grammar')
| -rw-r--r-- | grammar/rust.lm | 45 |
1 files changed, 43 insertions, 2 deletions
diff --git a/grammar/rust.lm b/grammar/rust.lm index 929a9a98..e400cce5 100644 --- a/grammar/rust.lm +++ b/grammar/rust.lm @@ -1,5 +1,7 @@ lex literal `fn `use `let `mut `if `struct `for `in + literal `true `false + literal `ref literal `; `:: `( `) `{ `} `. `, literal `[ `] `: @@ -18,6 +20,9 @@ lex literal `= literal `+= `-= `*= `/= `%= `&= `|= `^= `<<= `>>= + literal `_ + + token id /[A-Za-z_] [A-Za-z_0-9]*/ token string /'"' ( [^\"] | '\\' any )* '"'/ token number /[0-9]+/ @@ -34,6 +39,36 @@ def use_stmt [`use qual_id `;] # +# Patterns +# + +def literal_pattern + [`true] +| [`false] +| [string] +| [number] + +def identifier_pattern + [opt_ref opt_mut id] + +def pattern_tail + [pattern_tail `, pattern] +| [] + +def pattern + [literal_pattern] +| [identifier_pattern] +| [`_] +| [paths `( pattern pattern_tail `)] + +def match_arms_pattern_tail + [match_arms_pattern_tail `| pattern] +| [] + +def match_arms_pattern + [pattern match_arms_pattern_tail] + +# # Function declaration # @@ -79,6 +114,10 @@ def opt_mut [`mut] | [] +def opt_ref + [`ref] +| [] + def opt_type [`: type] | [] @@ -88,7 +127,7 @@ def let_rvalue | [`{ stmt_list `}] def let_stmt - [`let opt_mut id opt_type `= let_rvalue] + [`let pattern opt_type `= let_rvalue] def expr_tail [expr_tail `, expr] @@ -127,6 +166,8 @@ def paths | [id `{ cons_list `}] | [ `[ number `; number `]] | [`( `)] +| [`true] +| [`false] def func_index [func_index `. qual_id `( expr_list `)] @@ -246,7 +287,7 @@ def stmt_list | [] def if_stmt - [`if `let expr `= expr `{ stmt_list `} ] + [`if `let match_arms_pattern `= expr `{ stmt_list `} ] | [`if expr `{ stmt_list `} ] def field |