crepl

commit 90ddf985e0d10c284c0fd946af4985cd2f9d4801
parent 397d47a11a34b9e1dd15971985186591c63e6bbd
Author: Demonstrandum <moi@knutsen.co>
Date:   Thu, 25 Jun 2020 14:58:04 +0100

Make juxtaposition right associative.

Diffstat:
M
src/parse.c
 | 
8
+++++++-

1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/src/parse.c b/src/parse.c
@@ -386,7 +386,13 @@ ParseNode *parse_infix(const ParseNode *left,
 			unary->is_postfix = true;
 		} else { // Function call.
 			unary->callee = left;
-			unary->operand = parse_expr(rest, FUNCTION_PRECEDENCE);
+			// The minus one (- 1) makes function application right
+			// associative, this is unconventional, and makes applications
+			// on functions that return functions not very pretty.
+			// However, it makes for more natural syntax for multiplication
+			// by juxtaposition.
+			// e.g.  3 sin 2  =>  (3 (sin 2)) vs ((3 sin) 2)  [<- error]
+			unary->operand = parse_expr(rest, FUNCTION_PRECEDENCE - 1);
 			unary->is_postfix = false;
 		}