From 96362daa03ca36a94ca7c5939446f772d95229b5 Mon Sep 17 00:00:00 2001
From: "Juan J. Martinez" <jjm@usebox.net>
Date: Tue, 18 Jun 2024 16:02:46 +0100
Subject: Improved parsing

---
 README.md |  8 +++-----
 funco     | 14 +++++++++++---
 2 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/README.md b/README.md
index fcbb5bd..dd6fb76 100644
--- a/README.md
+++ b/README.md
@@ -37,8 +37,7 @@ end
 A program can have:
 
 * line comments, with `#`
-* function definitions
-* expressions
+* function definitions, that contain other function definitions and expressions
 
 A `main()` function is required and will be executed as entry point for the program.
 
@@ -62,10 +61,9 @@ Literals include:
 * strings: `"this is a string"`
 * booleans (`true` or `false`), as result of some logical functions; although 0 is false and non-zero is true
 * lists
-* functions
-* none for "no value"
+* `none` for "no value"
 
-Operators are functions, that includes:
+Operators are functions, that include:
 
 * `+`, `-`, `*`, `/`, `mod`
 * `>`, `<`, `>=`, `<=`, `=`, `!=`
diff --git a/funco b/funco
index aab0a0c..86da6a6 100755
--- a/funco
+++ b/funco
@@ -237,7 +237,7 @@ class Parser(object):
     def expect(self, expected):
         found = self.next()
         if not isinstance(found, expected):
-            error(f"{found.pos}: {expected.value} expected, {found.value} found instead")
+            error(f"{found.pos}: {expected.value} expected, {found.value} found")
 
     def parse_parms(self) -> list:
         parms = []
@@ -263,7 +263,10 @@ class Parser(object):
             arg = self.next()
             if isinstance(arg, Rpar):
                 break
-            args.append(self.parse_expr(arg))
+            elif arg.value == "end":
+                error(f"{arg.pos}: ) expected, end found")
+            else:
+                args.append(self.parse_expr(arg))
         return Call(ident, args)
 
     def parse_tailrec(self):
@@ -331,8 +334,13 @@ class Parser(object):
                             return out
                         else:
                             error(f"{token.pos}: end not in open block")
-                out.append(self.parse_expr(token))
+                if in_block:
+                    out.append(self.parse_expr(token))
+                else:
+                    error(f"{token.pos}: expression not in a function")
         except StopIteration:
+            if in_block:
+                error("unexpected EOF in open block")
             return out
 
 
-- 
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