Updated example.

TODO.md

@@ -1,7 +1,7 @@
-1. Differentiate parameters and arguments -- params for function definitions,
+0. Create file to describe properties of terminology used; param, arg, var, &c.
+1. Differenciate parameters and arguments -- params for function definitions,
 arguments for function calls
+2. Add scope field to all ASTs, and new scope layer for those that need it.
 
 Change editor to GNU Readline.
 Make variables persist through lines in the editor.
-
-Return syntax errors as exceptions.

definitions.md

@@ -1,36 +0,0 @@
-Lambda
-    size_t parmc
-    AST** parmv
-    AST* body
-
-Call
-    Lambda to
-        size_t parmc
-        AST** parmv
-    size_t argc
-    AST** argv
-
-VDef
-    char* name
-    AST* exp
-
-(\(x) x * 2)(4)
-
-Call
-to:
-    Lambda
-    parc: 1
-    parv: [ x ]
-    body: 
-        Call
-        to:
-            BIF(mul)
-         argc: 2
-         argv: [
-             VRef
-             name: x
-
-             2
-         ]
-argc: 1
-argv: [ 4 ]

examples/function.scl

@@ -1,3 +1,3 @@
-f(n) = 2 * n
+f(n) 2 * n
 
 f(5)

src/ast.c

@@ -2,12 +2,24 @@
 #include <stdio.h>
 
 #include "include/ast.h"
+#include "include/dstr.h"
 #include "include/gc.h"
 #include "include/scope.h"
 #include "include/util.h"
 
 extern AST* root;
 
+static char* asttype_names[] = {
+    [AST_TYPE_CALL] = "FUNC CALL",
+    [AST_TYPE_NUM] = "NUMBER",
+    [AST_TYPE_VREF] = "VAR REFERENCE",
+    [AST_TYPE_VDEF] = "VAR DEFINITION",
+    [AST_TYPE_BLOCK] = "BLOCK",
+    [AST_TYPE_EXC] = "EXCEPTION",
+    [AST_TYPE_FDEF] = "FUNCTION DEFINITION",
+    [AST_TYPE_ARG] = "DEFINITION ARGUMENT"
+};
+
 AST* ast_init(ASTType type, void* data) {
     AST* ast = gc_alloc(sizeof(AST), GC_TYPE_AST);
 
@@ -39,16 +51,36 @@ void ast_destroy(AST* ast) {
     if (!ast) return;
 
     switch (ast->type) {
-        case AST_TYPE_NUM:    ast_num_data_destroy(ast->data); break;
-        case AST_TYPE_CALL:   ast_call_data_destroy(ast->data); break;
-        case AST_TYPE_VREF:   ast_vref_data_destroy(ast->data); break;
-        case AST_TYPE_VDEF:   ast_vdef_data_destroy(ast->data); break;
-        case AST_TYPE_BLOCK:  ast_block_data_destroy_psv(ast->data); break;
-        case AST_TYPE_FDEF:   ast_fdef_data_destroy_psv(ast->data); break;
-        case AST_TYPE_ARG:    ast_arg_data_destroy(ast->data); break;
-        case AST_TYPE_BIF:    ast_bif_data_destroy(ast->data); break;
-        case AST_TYPE_EXC:    ast_exc_data_destroy(ast->data); break;
-        case AST_TYPE_LAMBDA: ast_lambda_data_destroy(ast->data); break;
+        case AST_TYPE_NUM:   ast_num_data_destroy(ast->data); break;
+        case AST_TYPE_CALL:  ast_call_data_destroy(ast->data); break;
+        case AST_TYPE_VREF:  ast_vref_data_destroy(ast->data); break;
+        case AST_TYPE_VDEF:  ast_vdef_data_destroy(ast->data); break;
+        case AST_TYPE_BLOCK: ast_block_data_destroy(ast->data); break;
+        case AST_TYPE_FDEF:  ast_fdef_data_destroy(ast->data); break;
+        case AST_TYPE_ARG:   ast_arg_data_destroy(ast->data); break;
+        default:
+            log_dbgf("Unknown ast type %d (max: %d)", ast->type, AST_TYPE_MAX);
+    }
+
+    // If there're no more `AST`s linked to the scope, free.
+    if (ast->scope && !--ast->scope->uses) scope_destroy_psv(ast->scope);
+
+    free(ast);
+}
+
+void ast_destroy_psv(AST* ast) {
+    if (!ast) return;
+
+    switch (ast->type) {
+        case AST_TYPE_NUM:   ast_num_data_destroy(ast->data); break;
+        case AST_TYPE_CALL:  ast_call_data_destroy_psv(ast->data); break;
+        case AST_TYPE_VREF:  ast_vref_data_destroy(ast->data); break;
+        case AST_TYPE_VDEF:  ast_vdef_data_destroy_psv(ast->data); break;
+        case AST_TYPE_BLOCK: ast_block_data_destroy_psv(ast->data); break;
+        case AST_TYPE_FDEF:  ast_fdef_data_destroy_psv(ast->data); break;
+        case AST_TYPE_ARG:   ast_arg_data_destroy(ast->data); break;
+        case AST_TYPE_BIF:   ast_bif_data_destroy(ast->data); break;
+        case AST_TYPE_EXC:   ast_exc_data_destroy(ast->data); break;
         default:
             log_dbgf("Unknown ast type %d (max: %d)", ast->type, AST_TYPE_MAX);
     }
@@ -56,6 +88,35 @@ void ast_destroy(AST* ast) {
     free(ast);
 }
 
+void ast_print(AST* ast) {
+    if (!ast) return;
+    ast_print_i(ast, 0);
+}
+
+void ast_print_i(AST* ast, int i) {
+    INDENT_BEGIN(i);
+
+    INDENT_TITLE("AST", ast);
+    INDENT_FIELD("type", "%s", asttype_names[ast->type]);
+    INDENT_FIELD("scope", "%p", ast->scope);
+    INDENT_FIELD_EXT_NONL_START("data");
+    switch (ast->type) {
+        case AST_TYPE_NUM:
+            printf("%s  %lf\n", INDENT_spacing->buf, *(ASTNumData*)ast->data);
+            break;
+        case AST_TYPE_CALL:  ast_call_print(ast->data, i + 2); break;
+        case AST_TYPE_EXC:   ast_exc_print(ast->data, i + 2); break;
+        case AST_TYPE_VREF:  ast_vref_print(ast->data, i + 2); break;
+        case AST_TYPE_VDEF:  ast_vdef_print(ast->data, i + 2); break;
+        case AST_TYPE_BLOCK: ast_block_print(ast->data, i + 2); break;
+        case AST_TYPE_FDEF:  ast_fdef_print(ast->data, i + 2); break;
+        case AST_TYPE_ARG:   ast_arg_print(ast->data, i + 2); break;
+        default:             exit(1);
+    }
+    INDENT_FIELD_NONL_END;
+    INDENT_END;
+}
+
 ASTNumData* ast_num_data_init(double val) {
     talloc(ASTNumData, num);
 
@@ -66,6 +127,14 @@ ASTNumData* ast_num_data_init(double val) {
 
 void ast_num_data_destroy(ASTNumData* num) { free(num); }
 
+void ast_num_print(ASTNumData* data, int i) {
+    INDENT_BEGIN(i);
+
+    INDENT_FIELD("data", "%lf", *data);
+
+    INDENT_END;
+}
+
 ASTExcData* ast_exc_data_init(const char* msg, AST* trace) {
     ASTExcData* data = malloc(sizeof(ASTExcData));
     data->msg = msg;
@@ -78,34 +147,32 @@ void ast_exc_data_destroy(ASTExcData* exc) {
     free(exc);
 }
 
+void ast_exc_print(ASTExcData* data, int i) {
+    INDENT_BEGIN(i);
+
+    INDENT_TITLE("ASTExcData", data);
+    INDENT_FIELD("msg", "\"%s\"", data->msg);
+    if (data->trace == NULL) {
+        INDENT_FIELD("trace", "%p", NULL)
+    } else {
+        INDENT_FIELD_EXT_NONL_START("trace");
+        ast_print_i(data->trace, i + 1);
+        INDENT_FIELD_NONL_END;
+    }
+    INDENT_END;
+}
+
 ASTBIFData* ast_bif_data_init(AST* fn(size_t, AST**, Scope*)) {
     return (ASTBIFData*)fn;
 }
 
 void ast_bif_data_destroy(ASTBIFData* bif) { return; }
 
-// Lambda.
-
-ASTLambdaData* ast_lambda_data_init(size_t parc, AST** parv, AST* body) {
-    talloc(ASTLambdaData, lambda);
-
-    lambda->parc = parc;
-    lambda->parv = parv;
-    lambda->body = body;
-
-    return lambda;
-}
-
-void ast_lambda_data_destroy(ASTLambdaData* lambda) {
-    free(lambda->parv);
-    free(lambda);
-}
-
-// Call.
-
-ASTCallData* ast_call_data_init(size_t argc, AST** argv, AST* to) {
+ASTCallData* ast_call_data_init(char* to, size_t argc, AST** argv) {
     talloc(ASTCallData, call);
 
+    log_dbgf("to: %s", to);
+
     call->to = to;
     call->argc = argc;
     call->argv = argv;
@@ -115,27 +182,63 @@ ASTCallData* ast_call_data_init(size_t argc, AST** argv, AST* to) {
 
 void ast_call_data_destroy(ASTCallData* call) {
     if (!call) return;
+    free(call->to);
+    for (size_t i = 0; i < call->argc; i++) ast_destroy(call->argv[i]);
     free(call->argv);
     free(call);
 }
 
-// VDef.
+void ast_call_data_destroy_psv(ASTCallData* call) {
+    if (!call) return;
+    free(call->to);
+    call->to = NULL;
+    free(call->argv);
+    call->argv = NULL;
+    free(call);
+}
 
-ASTVDefData* ast_vdef_data_init(char* name, AST* exp) {
+void ast_call_print(ASTCallData* data, int i) {
+    INDENT_BEGIN(i);
+
+    INDENT_TITLE("ASTCallData", data);
+    INDENT_FIELD("to", "%s", data->to);
+    INDENT_FIELD("argc", "%ld", data->argc);
+    INDENT_FIELD_LIST("argv", data->argv, data->argc, ast_print_i);
+
+    INDENT_END;
+}
+
+ASTVDefData* ast_vdef_data_init(char* name, AST* val) {
     talloc(ASTVDefData, vdef);
 
     vdef->name = name;
-    vdef->exp = exp;
+    vdef->val = val;
 
     return vdef;
 }
 
 void ast_vdef_data_destroy(ASTVDefData* vdef) {
+    ast_destroy(vdef->val);
     free(vdef->name);
     free(vdef);
 }
 
-// VRef.
+void ast_vdef_data_destroy_psv(ASTVDefData* vdef) {
+    free(vdef->name);
+    free(vdef);
+}
+
+void ast_vdef_print(ASTVDefData* vdef, int depth) {
+    INDENT_BEGIN(depth);
+
+    INDENT_TITLE("ASTVDefData", vdef);
+    INDENT_FIELD("name", "%s", vdef->name);
+    INDENT_FIELD_EXT_NONL_START("val");
+    ast_print_i(vdef->val, depth + 2); // 2 because already indented.
+    INDENT_FIELD_NONL_END;
+
+    INDENT_END;
+}
 
 ASTVrefData* ast_vref_data_init(char* to) {
     talloc(ASTVrefData, vref);
@@ -150,6 +253,15 @@ void ast_vref_data_destroy(ASTVrefData* vref) {
     free(vref);
 }
 
+void ast_vref_print(ASTVrefData* data, int i) {
+    INDENT_BEGIN(i);
+
+    INDENT_TITLE("ASTVrefData", data);
+    INDENT_FIELD("to", "%s", data->to);
+
+    INDENT_END;
+}
+
 ASTBlockData* ast_block_data_init(AST** inside, size_t ln) {
     ASTBlockData* block = malloc(sizeof(ASTBlockData));
 
@@ -171,6 +283,16 @@ void ast_block_data_destroy_psv(ASTBlockData* block) {
     free(block);
 }
 
+void ast_block_print(ASTBlockData* data, int depth) {
+    INDENT_BEGIN(depth);
+
+    INDENT_TITLE("ASTBlockData", data);
+    INDENT_FIELD("ln", "%ld", data->ln);
+    INDENT_FIELD_LIST("inside", data->inside, data->ln, ast_print_i);
+
+    INDENT_END;
+}
+
 ASTFDefData*
 ast_fdef_data_init(char* name, size_t argc, AST** argv, AST* body) {
     ASTFDefData* fdef = malloc(sizeof(ASTFDefData));
@@ -195,6 +317,18 @@ void ast_fdef_data_destroy_psv(ASTFDefData* fdef) {
     free(fdef);
 }
 
+void ast_fdef_print(ASTFDefData* fdef, int i) {
+    INDENT_BEGIN(i)
+    INDENT_TITLE("ASTFDefData", fdef);
+    INDENT_FIELD("name", "%s", fdef->name);
+    INDENT_FIELD("argc", "%ld", fdef->argc);
+    INDENT_FIELD_LIST("argv", fdef->argv, fdef->argc, ast_print_i);
+    INDENT_FIELD_EXT_NONL_START("body");
+    ast_print_i(fdef->body, i + 2);
+    INDENT_FIELD_NONL_END;
+    INDENT_END;
+}
+
 ASTArgData* ast_arg_data_init(char* name) {
     ASTArgData* arg = malloc(sizeof(ASTArgData));
     arg->name = name;
@@ -203,6 +337,13 @@ ASTArgData* ast_arg_data_init(char* name) {
 
 void ast_arg_data_destroy(ASTArgData* arg) { free(arg->name); }
 
+void ast_arg_print(ASTArgData* arg, int i) {
+    INDENT_BEGIN(i);
+    INDENT_TITLE("ASTArgData", arg);
+    INDENT_FIELD("name", "%s", arg->name);
+    INDENT_END;
+}
+
 AST* ast_find(Scope* scope, char* name) {
     while (scope) {
         AST* gotten = htab_get(scope->here, name);

src/ast_print.c

@@ -1,139 +0,0 @@
-#include "include/ast_print.h"
-#include "include/dstr.h"
-#include "include/util.h"
-#include <stdio.h>
-
-static char* asttype_names[] = {
-    [AST_TYPE_CALL] = "FUNC CALL",
-    [AST_TYPE_NUM] = "NUMBER",
-    [AST_TYPE_VREF] = "VAR REFERENCE",
-    [AST_TYPE_VDEF] = "VAR DEFINITION",
-    [AST_TYPE_BLOCK] = "BLOCK",
-    [AST_TYPE_EXC] = "EXCEPTION",
-    [AST_TYPE_FDEF] = "FUNCTION DEFINITION",
-    [AST_TYPE_ARG] = "DEFINITION ARGUMENT",
-    [AST_TYPE_LAMBDA] = "LAMBDA EXPRESSION"
-};
-
-void ast_print(AST* ast) {
-    if (!ast) return;
-    ast_print_i(ast, 0);
-}
-
-void ast_print_i(AST* ast, int i) {
-    INDENT_BEGIN(i);
-
-    INDENT_TITLE("AST", ast);
-    INDENT_FIELD("type", "%s", asttype_names[ast->type]);
-    // INDENT_FIELD("scope", "%p", ast->scope);
-    INDENT_FIELD_EXT_NONL_START("data");
-    switch (ast->type) {
-        case AST_TYPE_NUM:
-            printf("%s  %lf\n", INDENT_spacing->buf, *(ASTNumData*)ast->data);
-            break;
-        case AST_TYPE_CALL:   ast_call_print(ast->data, i + 2); break;
-        case AST_TYPE_EXC:    ast_exc_print(ast->data, i + 2); break;
-        case AST_TYPE_VREF:   ast_vref_print(ast->data, i + 2); break;
-        case AST_TYPE_VDEF:   ast_vdef_print(ast->data, i + 2); break;
-        case AST_TYPE_BLOCK:  ast_block_print(ast->data, i + 2); break;
-        case AST_TYPE_FDEF:   ast_fdef_print(ast->data, i + 2); break;
-        case AST_TYPE_ARG:    ast_arg_print(ast->data, i + 2); break;
-        case AST_TYPE_LAMBDA: ast_lambda_print(ast->data, i + 2); break;
-        default:              exit(1);
-    }
-    INDENT_FIELD_NONL_END;
-    INDENT_END;
-}
-
-void ast_num_print(ASTNumData* data, int i) {
-    INDENT_BEGIN(i);
-
-    INDENT_FIELD("data", "%lf", *data);
-
-    INDENT_END;
-}
-
-void ast_exc_print(ASTExcData* data, int i) {
-    INDENT_BEGIN(i);
-
-    INDENT_TITLE("ASTExcData", data);
-    INDENT_FIELD("msg", "\"%s\"", data->msg);
-    if (data->trace == NULL) {
-        INDENT_FIELD("trace", "%p", NULL)
-    } else {
-        INDENT_FIELD_EXT_NONL_START("trace");
-        ast_print_i(data->trace, i + 1);
-        INDENT_FIELD_NONL_END;
-    }
-    INDENT_END;
-}
-
-void ast_call_print(ASTCallData* data, int i) {
-    INDENT_BEGIN(i);
-
-    INDENT_TITLE("ASTCallData", data);
-    INDENT_FIELD("to", "%s", data->to);
-    INDENT_FIELD("argc", "%ld", data->argc);
-    INDENT_FIELD_LIST("argv", data->argv, data->argc, ast_print_i);
-
-    INDENT_END;
-}
-void ast_vdef_print(ASTVDefData* vdef, int depth) {
-    INDENT_BEGIN(depth);
-
-    INDENT_TITLE("ASTVDefData", vdef);
-    INDENT_FIELD("name", "%s", vdef->name);
-    INDENT_FIELD_EXT_NONL_START("val");
-    ast_print_i(vdef->val, depth + 2); // 2 because already indented.
-    INDENT_FIELD_NONL_END;
-
-    INDENT_END;
-}
-
-void ast_vref_print(ASTVrefData* data, int i) {
-    INDENT_BEGIN(i);
-
-    INDENT_TITLE("ASTVrefData", data);
-    INDENT_FIELD("to", "%s", data->to);
-
-    INDENT_END;
-}
-
-void ast_block_print(ASTBlockData* data, int depth) {
-    INDENT_BEGIN(depth);
-
-    INDENT_TITLE("ASTBlockData", data);
-    INDENT_FIELD("ln", "%ld", data->ln);
-    INDENT_FIELD_LIST("inside", data->inside, data->ln, ast_print_i);
-
-    INDENT_END;
-}
-
-void ast_fdef_print(ASTFDefData* fdef, int i) {
-    INDENT_BEGIN(i)
-    INDENT_TITLE("ASTFDefData", fdef);
-    INDENT_FIELD("name", "%s", fdef->name);
-    INDENT_FIELD("argc", "%ld", fdef->argc);
-    INDENT_FIELD_LIST("argv", fdef->argv, fdef->argc, ast_print_i);
-    INDENT_FIELD_EXT_NONL_START("body");
-    ast_print_i(fdef->body, i + 2);
-    INDENT_FIELD_NONL_END;
-    INDENT_END;
-}
-void ast_arg_print(ASTArgData* arg, int i) {
-    INDENT_BEGIN(i);
-    INDENT_TITLE("ASTArgData", arg);
-    INDENT_FIELD("name", "%s", arg->name);
-    INDENT_END;
-}
-
-void ast_lambda_print(ASTLambdaData* lambda, int i) {
-    INDENT_BEGIN(i)
-    INDENT_TITLE("ASTLambdaData", lambda);
-    INDENT_FIELD("argc", "%ld", lambda->argc);
-    INDENT_FIELD_LIST("argv", lambda->argv, lambda->argc, ast_print_i);
-    INDENT_FIELD_EXT_NONL_START("body");
-    ast_print_i(lambda->body, i + 2);
-    INDENT_FIELD_NONL_END;
-    INDENT_END;
-}

src/exec.c

@@ -4,6 +4,7 @@
 
 #include "include/ast.h"
 #include "include/builtin.h"
+#include "include/dlist.h"
 #include "include/exec.h"
 #include "include/htab.h"
 #include "include/scope.h"
@@ -38,11 +39,10 @@ AST* exec_exp(AST* ast, Scope* parent) {
             return ast_init(
                 AST_TYPE_NUM, ast_num_data_init(*(ASTNumData*)ast->data)
             );
-        case AST_TYPE_VREF:   return exec_vref(ast, parent);
-        case AST_TYPE_VDEF:   return exec_vdef(ast, parent);
-        case AST_TYPE_FDEF:   return exec_fdef(ast, parent);
-        case AST_TYPE_LAMBDA: return exec_lambda(ast, parent);
-        default:              printf("what\n"); exit(1);
+        case AST_TYPE_VREF: return exec_vref(ast, parent);
+        case AST_TYPE_VDEF: return exec_vdef(ast, parent);
+        case AST_TYPE_FDEF: return exec_fdef(ast, parent);
+        default:            printf("what\n"); exit(1);
     }
 }
 
@@ -64,8 +64,7 @@ AST* exec_call(AST* ast, Scope* parent) {
     ASTCallData* data = (ASTCallData*)ast->data;
     size_t argc = data->argc;
     AST** argv = data->argv;
-    // char* fname = data->to;
-    AST* exp = data->to;
+    char* fname = data->to;
 
     ast->scope = parent;
 
@@ -80,8 +79,7 @@ AST* exec_call(AST* ast, Scope* parent) {
         case AST_TYPE_BIF:
             ASTBIFData bifdata = fdef->data;
             return bifdata(argc, argv, parent);
-        case AST_TYPE_FDEF:   return exec_cf(fdef, argc, argv);
-        case AST_TYPE_LAMBDA: return exec_lambda_call(fdef, argc, argv);
+        case AST_TYPE_FDEF: return exec_cf(fdef, argc, argv);
         default:
             return ast_init(AST_TYPE_EXC, ast_exc_data_init("Good job!", NULL));
     }
@@ -134,29 +132,14 @@ AST* exec_vref(AST* ast, Scope* parent) {
 AST* exec_fdef(AST* ast, Scope* parent) {
     ast->scope = scope_init(parent);
     ASTFDefData* fdef = (ASTFDefData*)ast->data;
+    log_dbgf("IS THIS SUSPICIOUS??? %i", fdef->body->type);
     AST* val = ast;
     char* key = fdef->name;
     scope_add(parent, key, val);
+    // TODO: Create lambda functions.
     return fdef->body; // Function definitions return function body.
 }
 
-AST* exec_lambda(AST* ast, Scope* parent) {
-    // Executing a lambda on its own with no arguments returns itself.
-    return ast;
-}
-
-AST* exec_lambda_call(AST* ast, size_t argc, AST** argv) {
-    Scope* callscope = scope_init(ast->scope);
-    ASTFDefData* lambda = (ASTFDefData*)ast->data;
-    for (int i = 0; i < argc; i++) {
-        char* key = ((ASTArgData*)lambda->argv[i]->data)->name;
-        AST* val = argv[i];
-        scope_add(callscope, key, val);
-    }
-
-    return exec_exp(lambda->body, callscope);
-}
-
 void exec_print(double n) { printf("= %lf\n", n); }
 
 inline void exec_new_scope(AST* ast, Scope* inherit) {

src/grammar.y

@@ -47,8 +47,6 @@
 
 %token NL // Newline.
 
-%token BACKSLASH
-
 %left ADD SUB
 %left MUL DIV
 %precedence NEG
@@ -126,25 +124,12 @@ block:
 exp:
     NUM { $$ = ast_init(AST_TYPE_NUM, ast_num_data_init($1)); }
 
-    // Function definitions. Convert to VDef of Lambda.
-    | WORD GROUPS arg GROUPE exp {
-        size_t parc = $3->ln;
-        AST** parv = $3->buf;
+    // Function definitions.
+    | WORD GROUPS arg GROUPE EQ exp {
+        size_t argc = $3->ln;
+        AST** argv = $3->buf;
         argarr_destroypsv($3);
-        $$ = ast_init(AST_TYPE_VDEF, ast_vdef_data_init(
-            $1,
-            ast_init(AST_TYPE_LAMBDA, ast_lambda_data_init(
-                parc, parv, $5
-            )
-        ));
-    }
-
-    // Lambda definitions.
-    | BACKSLASH GROUPS arg GROUPE exp {
-        size_t parc = $3->ln;
-        AST** parv = $3->buf;
-        argarr_destroypsv($3);
-        $$ = ast_init(AST_TYPE_LAMBDA, ast_lambda_data_init(parc, parv, $5));
+        $$ = ast_init(AST_TYPE_FDEF, ast_fdef_data_init($1, argc, argv, $6));
     }
 
     | BLOCKS block BLOCKE {

src/include/ast.h

@@ -18,14 +18,13 @@ typedef enum {
     AST_TYPE_LIST, // A list (variable size, variable type).
 
     // Misc. types.
-    AST_TYPE_BIF,    // Built-in function.
-    AST_TYPE_CALL,   // A function call.
-    AST_TYPE_VDEF,   // A variable definition.
-    AST_TYPE_VREF,   // A variable reference.
-    AST_TYPE_BLOCK,  // A block of code (scope).
-    AST_TYPE_FDEF,   // A function definition.
-    AST_TYPE_LAMBDA, // An anonymous function definition.
-    AST_TYPE_ARG,    // A definition argument.
+    AST_TYPE_BIF,   // Built-in function.
+    AST_TYPE_CALL,  // A function call.
+    AST_TYPE_VDEF,  // A variable definition.
+    AST_TYPE_VREF,  // A variable reference.
+    AST_TYPE_BLOCK, // A block of code (scope).
+    AST_TYPE_FDEF,  // A function definition.
+    AST_TYPE_ARG,   // A definition argument.
     AST_TYPE_MAX = AST_TYPE_ARG,
 } ASTType;
 
@@ -40,8 +39,14 @@ typedef struct {
 AST* ast_init(ASTType type, void* data);
 // Create a new `AST` with a specified scope.
 AST* ast_init_scope(ASTType type, void* data, Scope* scope);
-// Destroy an `AST`.
+// Destroy an `AST`, recursively.
 void ast_destroy(AST* ast);
+// Destroy an `AST`.
+void ast_destroy_psv(AST* ast);
+// Print an `AST`, recursively.
+void ast_print(AST* ast);
+// Helper function to `ast_print()`, where `i` is indentation level.
+void ast_print_i(AST* ast, int i);
 
 // A number.
 typedef double ASTNumData;
@@ -50,30 +55,20 @@ typedef double ASTNumData;
 ASTNumData* ast_num_data_init(double val);
 // Destroy an `ASTNumData`.
 void ast_num_data_destroy(ASTNumData* num);
+// Print an `ASTNumData`.
+void ast_num_print(ASTNumData*, int i);
 
 // An exception.
 typedef struct ASTEXCDATA {
-    const char* msg; // The exception message.
-    AST* trace;      // The previous exception.
+    const char* msg;  // The exception message.
+    AST* trace; // The previous exception.
 } ASTExcData;
 // Create a new `ASTExecData. `msg` should be static.
 ASTExcData* ast_exc_data_init(const char* msg, AST* trace);
 // Destroy an `ASTExecData`.
 void ast_exc_data_destroy(ASTExcData* exc);
-
-// Argument list as anonymous struct.
-#define ARGS                                                                   \
-    struct {                                                                   \
-        size_t argc;                                                           \
-        AST** argv;                                                            \
-    }
-
-// Parameter list as anonymous struct.
-#define PARS                                                                   \
-    struct {                                                                   \
-        size_t parc;                                                           \
-        AST** parv;                                                            \
-    }
+// Print an `ASTExecData`.
+void ast_exc_print(ASTExcData*, int i);
 
 // A built-in function.
 typedef AST* (*ASTBIFData)(size_t argc, AST** argv, Scope* scope);
@@ -83,41 +78,38 @@ ASTBIFData* ast_bif_data_init(AST* fn(size_t, AST**, Scope*));
 // Destroy an `ASTBIFData`.
 void ast_bif_data_destroy(ASTBIFData* bif);
 
-// A lambda.
+// A call (to a function).
 typedef struct {
-    PARS;      // The parameters the lambda can accept.
-    AST* body; // The body expression to be executed.
-} ASTLambdaData;
-
-// Creates a new `ASTLambdaData`.
-ASTLambdaData* ast_lambda_data_init(size_t parc, AST** parv, AST* body);
-// Destroy an `ASTLambdaData`.
-void ast_lambda_data_destroy(ASTLambdaData*);
-
-// A call.
-typedef struct {
-    ARGS;    // The arguments the call is made with.
-    AST* to; // The expression the call is to (probably either lambda or
-             // builtin).
+    char* to;    // What the call's to.
+    size_t argc; // Argument count.
+    AST** argv;  // Argument vector.
 } ASTCallData;
 
 // Create a new `ASTCallData`.
-ASTCallData* ast_call_data_init(size_t argc, AST** argv, AST* to);
-// Destroy an `ASTCallData`.
+ASTCallData* ast_call_data_init(char* to, size_t argc, AST** argv);
+// Destroy an `ASTCallData` recursively.
 void ast_call_data_destroy(ASTCallData* call);
+// Destroy an `ASTCallData`.
+void ast_call_data_destroy_psv(ASTCallData *call);
+// Print an `ASTCallData`.
+void ast_call_print(ASTCallData*, int i);
 
-// A variable definition. Associates a name with an expression.
+// A variable definition's data.
 typedef struct {
     char* name;
-    AST* exp;
+    AST* val;
 } ASTVDefData;
 
 // Create a new `ASTVDefData`.
-ASTVDefData* ast_vdef_data_init(char* name, AST* exp);
-// Destroy an `ASTVDefData`.
+ASTVDefData* ast_vdef_data_init(char* name, AST* val);
+// Destroys the `ASTVDefData`, `ASTVDefData->name`, and `ASTVDefData->val`.
 void ast_vdef_data_destroy(ASTVDefData* vdef);
+// Destroy an `ASTVDefData`.
+void ast_vdef_data_destroy_psv(ASTVDefData* vdef);
+// Print an `ASTVDefData`.
+void ast_vdef_print(ASTVDefData*, int depth);
 
-// A variable reference.
+// A variable reference's data.
 typedef struct {
     char* to; // What the reference's to.
 } ASTVrefData;
@@ -126,6 +118,8 @@ typedef struct {
 ASTVrefData* ast_vref_data_init(char* to);
 // Destroy an `ASTVRefData`.
 void ast_vref_data_destroy(ASTVrefData* call);
+// Print an `ASTVRefData`.
+void ast_vref_print(ASTVrefData*, int i);
 
 // A code block.
 typedef struct {
@@ -138,12 +132,15 @@ ASTBlockData* ast_block_data_init(AST** inside, size_t ln);
 // Destroy an `ASTBlockData`, recursively.
 void ast_block_data_destroy(ASTBlockData* block);
 // Destroy an `ASTBlockData`.
-void ast_block_data_destroy_psv(ASTBlockData* block);
+void ast_block_data_destroy_psv(ASTBlockData *block);
+// Print an `ASTBlockData`.
+void ast_block_print(ASTBlockData*, int i);
 
 typedef struct {
-    char* name; // Function name.
-    ARGS;       // Function args.
-    AST* body;  // Function body.
+    char* name;  // Function name.
+    size_t argc; // Argument count.
+    AST** argv;  // Argument vector.
+    AST* body;   // Function body.
 } ASTFDefData;
 
 // Create a new `ASTFDefData`.
@@ -152,6 +149,8 @@ ASTFDefData* ast_fdef_data_init(char* name, size_t argc, AST** argv, AST* body);
 void ast_fdef_data_destroy(ASTFDefData* fdef);
 // Destroy an `ASTFDefData`.
 void ast_fdef_data_destroy_psv(ASTFDefData* fdef);
+// Print an `ASTFDefData`.
+void ast_fdef_print(ASTFDefData* fdef, int i);
 
 typedef struct {
     char* name; // Argument name.
@@ -161,20 +160,9 @@ typedef struct {
 ASTArgData* ast_arg_data_init(char* name);
 // Destroy an `ASTArgData`.
 void ast_arg_data_destroy(ASTArgData* arg);
+// Print an `ASTArgData`.
+void ast_arg_print(ASTArgData* arg, int i);
 
-/*
-// Represents a function as data.
-typedef struct {
-    ARGS;
-    AST* body;
-} ASTLambdaData;
-
-// Creates a new `ASTLambdaData`.
-ASTLambdaData* ast_lambda_data_init(size_t argc, AST** argv, AST* body);
-// Destroy an `ASTLambdaData`.
-void ast_lambda_data_destroy(ASTLambdaData*);
-
-*/
 // Find a name in the scope.
 AST* ast_find(Scope* scope, char* name);
 

src/include/ast_print.h

@@ -1,38 +0,0 @@
-#ifndef AST_PRINT_H
-#define AST_PRINT_H
-
-#include "ast.h"
-
-// Print an `AST`, recursively.
-void ast_print(AST* ast);
-// Helper function to `ast_print()`, where `i` is indentation level.
-void ast_print_i(AST* ast, int i);
-
-// Print an `ASTNumData`.
-void ast_num_print(ASTNumData*, int i);
-
-// Print an `ASTExecData`.
-void ast_exc_print(ASTExcData*, int i);
-
-// Print an `ASTCallData`.
-void ast_call_print(ASTCallData*, int i);
-
-// Print an `ASTVDefData`.
-void ast_vdef_print(ASTVDefData*, int depth);
-
-// Print an `ASTVRefData`.
-void ast_vref_print(ASTVrefData*, int i);
-
-// Print an `ASTBlockData`.
-void ast_block_print(ASTBlockData*, int i);
-
-// Print an `ASTFDefData`.
-void ast_fdef_print(ASTFDefData* fdef, int i);
-
-// Print an `ASTArgData`.
-void ast_arg_print(ASTArgData* arg, int i);
-
-// Print an `ASTLambdaData`.
-void ast_lambda_print(ASTLambdaData* arg, int i);
-
-#endif

src/include/exec.h

@@ -20,10 +20,6 @@ AST* exec_vdef(AST* ast, Scope* parent);
 AST* exec_vref(AST* ast, Scope* parent);
 // Execute a function definition.
 AST* exec_fdef(AST* ast, Scope* parent);
-// Execute a lambda expression.
-AST* exec_lambda(AST* ast, Scope* parent);
-// Execute a lambda call.
-AST* exec_lambda_call(AST* ast, size_t argc, AST** argv);
 // Print the result of an execution.
 void exec_print(double n);
 

src/include/util.h

@@ -1,8 +1,6 @@
 #ifndef UTIL_H
 #define UTIL_H
 
-#include <signal.h>
-
 // Most of this file is cursed printing macros for `ast_print()`. Do not attempt
 // to comprehend.
 
@@ -12,9 +10,6 @@
 // Get the length of an array.
 #define arrln(A) (sizeof(A)/sizeof(*A))
 
-// Trap GDB &c.
-#define TRAP() RAISE(SIGTRAP)
-
 #ifdef DBG // Debug macros
 
 // Log a message.

src/lexer.c

@@ -116,7 +116,6 @@ int yylex() {
         case '{':  return BLOCKS;
         case '}':  return BLOCKE;
         case '=':  return EQ;
-        case '\\': return BACKSLASH;
         default:   fprintf(stderr, "Unexpected character: %c\n", c);
     }
 

src/main.c

@@ -2,7 +2,6 @@
 #include <string.h>
 
 #include "include/ast.h"
-#include "include/ast_print.h"
 #include "include/dstr.h"
 #include "include/exec.h"
 #include "include/gc.h"

type-notes.md

@@ -1,21 +0,0 @@
-Primitive Types
-- num
-- bool
-- str
-
-```
-fact(x) = ? (x <= 1) 1 : f(x-1) * x
-> lambda
-fact(5) == 120
-> True
-```
-
-Ordered collections.
-| Name | Homogeneous | Fixed Size | Unique |
-|---|---|---|---|
-| Collection | No | No | No |
-| List |  Yes | No | No |
-| Array | Yes | Yes | No |
-| Group | No | Yes | No |
-| Set | Yes | No | Yes |
-| Perm | Yes | Yes | Yes |