mumble

A Lisp written in C, following the *Build Your Own Lisp* book
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commit 28f94b2ee1f089f138040ddddbffd507d47a6527
parent 467fc866fb137fd0e48bad5aba66c8a4a88bbf34
Author: NunoSempere <nuno.sempere@protonmail.com>
Date:   Tue,  2 May 2023 00:32:36 -0400

feat: progress on list function.

Diffstat:
Mmumble | 0
Msrc/mumble.c | 14+++++++++-----
2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/mumble b/mumble Binary files differ. diff --git a/src/mumble.c b/src/mumble.c @@ -333,7 +333,7 @@ lispval* builtin_head(lispval* v){ // but I wanted to write & use clone instead. return result; // Returns something that should be freed later: yes. - // Returns something that is independent of the input: yes. + // Returns something that doesn't share pointers with the input: yes. } lispval* builtin_tail(lispval* v) @@ -360,15 +360,19 @@ lispval* builtin_tail(lispval* v) return clone_lispval(new); // Returns something that should be freed later: yes. - // Returns something that is independent of the input: yes. + // Returns something that doesn't share pointers with the input: yes. } lispval* builtin_list(lispval* v){ // list ( 1 2 3 ) LISPVAL_ASSERT(v->count ==1, "Error: function list passed too many arguments"); - LISPVAL_ASSERT(v->cell[0]->type == LISPVAL_QEXPR, "Error: Argument passed to list is not a q-expr, i.e., a bracketed list."); - v->type=LISPVAL_QEXPR; - return v; + lispval* old = v->cell[0]; + LISPVAL_ASSERT(old->type == LISPVAL_SEXPR, "Error: Argument passed to list is not an s-expr, i.e., a list with parenthesis."); + lispval* new = clone_lispval(old); + new->type=LISPVAL_QEXPR; + return new; + // Returns something that should be freed later: yes. + // Returns something that is independent of the input: yes. } lispval* evaluate_lispval(lispval* l);