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Parse list literals

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This commit is contained in:
greg 2018-03-08 12:01:24 -08:00
parent 59d621ed75
commit 1eeafb80dc
1 changed files with 18 additions and 1 deletions
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19
src/schala_lang/parsing.rs
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@ -56,12 +56,14 @@ prefix_expr := prefix_op call_expr
prefix_op := '+' | '-' | '!' | '~'
call_expr := index_expr ( '(' expr_list ')' )*
index_expr := primary ( '[' (expression (',' (expression)* | ε) ']' )*
primary := literal | paren_expr | if_expr | match_expr | for_expr | identifier_expr | curly_brace_expr
primary := literal | paren_expr | if_expr | match_expr | for_expr | identifier_expr | curly_brace_expr | list_expr
curly_brace_expr := lambda_expr | anonymous_struct //TODO
list_expr := '[' (expression, ',')* ']'
lambda_expr := '{' '|' (formal_param ',')* '|' (type_anno)* (statement)* '}'
paren_expr := LParen paren_inner RParen
paren_inner := (expression ',')*
identifier_expr := named_struct | IDENTIFIER
literal := 'true' | 'false' | number_literal | STR_LITERAL
named_struct := IDENTIFIER record_block
@ -254,6 +256,7 @@ pub enum ExpressionType {
params: Vec<FormalParam>,
body: Vec<Statement>,
},
ListLiteral(Vec<Expression>),
}
#[derive(Debug, PartialEq, Clone)]
@ -610,6 +613,7 @@ impl Parser {
match self.peek() {
LCurlyBrace => self.curly_brace_expr(),
LParen => self.paren_expr(),
LSquareBracket => self.list_expr(),
Keyword(Kw::If) => self.if_expr(),
Keyword(Kw::Match) => self.match_expr(),
Keyword(Kw::For) => self.for_expr(),
@ -618,6 +622,11 @@ impl Parser {
}
});
parse_method!(list_expr(&mut self) -> ParseResult<Expression> {
let exprs = delimited!(self, LSquareBracket, '[', expression, Comma, RSquareBracket, ']');
Ok(Expression(ExpressionType::ListLiteral(exprs), None))
});
parse_method!(curly_brace_expr(&mut self) -> ParseResult<Expression> {
self.lambda_expr()
});
@ -1214,4 +1223,12 @@ fn a(x) {
Lambda { params: vec![(rc!(x), None)], body: vec![exprstatement!(val!("y"))] })),
arguments: vec![ex!(IntLiteral(1))] })]));
}
#[test]
fn list_literals() {
parse_test! {
"[1,2]", AST(vec![
exprstatement!(ListLiteral(vec![ex!(IntLiteral(1)), ex!(IntLiteral(2))]))])
};
}
}