From df5294e88cc409d7adf3e10666bfcb40e34472b9 Mon Sep 17 00:00:00 2001 From: Dibyendu Majumdar Date: Sun, 1 Oct 2023 18:01:54 +0100 Subject: Chapter 3 - add vars and lexical scope. (#7) * Chapter 3 - add vars and lexical scope. * Fix typo * Overhaul graph viz Makes the scopes pointing into the graph being build more visually appealing. Constants are a printed with just the constant value. * Fix control edge color * Fix missing grouping operator parse Add a parens test. Shorten names 'Identifier' to 'Id' _lexer.match -> match require() passes a Node thru, so can be flow-coded. Uniform syntax error messages. Handy Lexer.toString for debugging. Drop Optional for null returns; less total code; less objects; less confusion. camelCase some fcns. * All parser helpers return Node, not void. Drop _ret. parseBlock and parseStatement now the same. * CLosely align chap2 and chap3 parsers Mostly whitespace aligned; dragged a few functions around to make more sense. I think the diff from Ch2 and Ch3 is down a few differences about what is a statement, plus all the symbol stuff for scopes and variables. * Add examples illustrating the symbol table creation. * Update docs and comments --------- Co-authored-by: Cliff Click --- chapter02/docs/02-grammar.md | 1 + 1 file changed, 1 insertion(+) (limited to 'chapter02/docs') diff --git a/chapter02/docs/02-grammar.md b/chapter02/docs/02-grammar.md index a4a79cea..1a1e1239 100644 --- a/chapter02/docs/02-grammar.md +++ b/chapter02/docs/02-grammar.md @@ -30,6 +30,7 @@ unaryExpression primaryExpression : INTEGER_LITERAL + | '(' expression ')' ; INTEGER_LITERAL -- cgit v1.2.3