Move files into src/ and build into build/

1 files changed, 552 insertions, 0 deletions

diff --git a/src/repl.c b/src/repl.c
new file mode 100644
index 00000000..39fe30fa
--- /dev/null
+++ b/src/repl.c
@@ -0,0 +1,552 @@
+// A Read-Evaluate-Print-Loop
+#include <dlfcn.h>
+#include <setjmp.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "stdlib/tomo.h"
+#include "stdlib/util.h"
+#include "typecheck.h"
+#include "parse.h"
+
+typedef union {
+    int8_t i8;
+    int16_t i16;
+    int32_t i32;
+    int64_t i64;
+    Int_t integer;
+    double n64;
+    float n32;
+} number_t;
+
+static jmp_buf on_err;
+
+static void run(env_t *env, ast_t *ast);
+static void eval(env_t *env, ast_t *ast, void *dest);
+
+typedef struct {
+    type_t *type;
+    void *value;
+} repl_binding_t;
+
+static PUREFUNC repl_binding_t *get_repl_binding(env_t *env, const char *name)
+{
+    repl_binding_t *b = Table$str_get(*env->locals, name);
+    return b;
+}
+
+void repl(void)
+{
+    env_t *env = global_env();
+    void *dl = dlopen("libtomo.so", RTLD_LAZY);
+    if (!dl) errx(1, "I couldn't find libtomo.so in your library paths");
+
+    size_t buf_size = 0;
+    char *line = NULL;
+    ssize_t len = 0;
+
+    if (setjmp(on_err))
+        printf("\n");
+
+    printf("\x1b[33;1m>>\x1b[m ");
+    fflush(stdout);
+
+    while ((len=getline(&line, &buf_size, stdin)) >= 0) {
+        if (len > 1) {
+            char *code = line;
+            if (starts_with(line, "if ") || starts_with(line, "for ") || starts_with(line, "while ")
+                || starts_with(line, "func ") || starts_with(line, "struct ") || starts_with(line, "lang ")) {
+                printf("\x1b[33;1m..\x1b[m ");
+                fflush(stdout);
+                code = GC_strdup(line);
+                while ((len=getline(&line, &buf_size, stdin)) >= 0) {
+                    if (len == 1) break;
+                    code = heap_strf("%s%s", code, line);
+                    printf("\x1b[33;1m..\x1b[m ");
+                    fflush(stdout);
+                }
+            } else {
+                code = heap_strf("func main(): >> %s", code);
+            }
+            ast_t *ast = parse_file(heap_strf("<code>%s", code), &on_err);
+            ast_t *doctest = Match(Match(Match(ast, Block)->statements->ast, FunctionDef)->body, Block)->statements->ast;
+            if (doctest->tag == DocTest) doctest->__data.DocTest.skip_source = 1;
+            run(env, doctest);
+        }
+        printf("\x1b[33;1m>>\x1b[m ");
+        fflush(stdout);
+    }
+    if (line) free(line);
+    printf("\n");
+}
+
+__attribute__((noreturn, format(printf, 2, 3)))
+static void repl_err(ast_t *node, const char *fmt, ...)
+{
+    bool color = isatty(STDERR_FILENO) && !getenv("NO_COLOR");
+    if (color)
+        fputs("\x1b[31;7;1m", stderr);
+    if (node)
+        fprintf(stderr, "%s:%ld.%ld: ", node->file->relative_filename, get_line_number(node->file, node->start),
+                get_line_column(node->file, node->start));
+    va_list args;
+    va_start(args, fmt);
+    vfprintf(stderr, fmt, args);
+    va_end(args);
+    if (color)
+        fputs(" \x1b[m", stderr);
+    fputs("\n\n", stderr);
+    if (node)
+        highlight_error(node->file, node->start, node->end, "\x1b[31;1m", 2, color);
+
+    longjmp(on_err, 1);
+}
+
+const TypeInfo_t *type_to_type_info(type_t *t)
+{
+    switch (t->tag) {
+    case AbortType: return &Abort$info;
+    case ReturnType: errx(1, "Shouldn't be getting a typeinfo for ReturnType");
+    case VoidType: return &Void$info;
+    case MemoryType: return &Memory$info;
+    case BoolType: return &Bool$info;
+    case BigIntType: return &Int$info;
+    case IntType:
+        switch (Match(t, IntType)->bits) {
+        case TYPE_IBITS64: return &Int64$info;
+        case TYPE_IBITS32: return &Int32$info;
+        case TYPE_IBITS16: return &Int16$info;
+        case TYPE_IBITS8: return &Int8$info;
+        default: errx(1, "Invalid bits");
+        }
+    case NumType:
+        switch (Match(t, NumType)->bits) {
+        case TYPE_NBITS64: return &Num$info;
+        case TYPE_NBITS32: return &Num32$info;
+        default: errx(1, "Invalid bits");
+        }
+    case TextType: return &Text$info;
+    case ArrayType: {
+        const TypeInfo_t *item_info = type_to_type_info(Match(t, ArrayType)->item_type);
+        TypeInfo_t array_info = *Array$info(item_info);
+        return memcpy(GC_MALLOC(sizeof(TypeInfo_t)), &array_info, sizeof(TypeInfo_t));
+    }
+    case TableType: {
+        const TypeInfo_t *key_info = type_to_type_info(Match(t, TableType)->key_type);
+        const TypeInfo_t *value_info = type_to_type_info(Match(t, TableType)->value_type);
+        const TypeInfo_t table_info = *Table$info(key_info, value_info);
+        return memcpy(GC_MALLOC(sizeof(TypeInfo_t)), &table_info, sizeof(TypeInfo_t));
+    }
+    case PointerType: {
+        auto ptr = Match(t, PointerType);
+        CORD sigil = ptr->is_stack ? "&" : "@";
+        const TypeInfo_t *pointed_info = type_to_type_info(ptr->pointed);
+        const TypeInfo_t pointer_info = *Pointer$info(sigil, pointed_info);
+        return memcpy(GC_MALLOC(sizeof(TypeInfo_t)), &pointer_info, sizeof(TypeInfo_t));
+    }
+    default: errx(1, "Unsupported type: %T", t);
+    }
+}
+
+static PUREFUNC void *get_address(env_t *env, ast_t *ast)
+{
+    switch (ast->tag) {
+    case Var: {
+        repl_binding_t *b = get_repl_binding(env, Match(ast, Var)->name);
+        if (!b) repl_err(ast, "No such variable");
+        return b->value;
+    }
+    default: errx(1, "Address not implemented for %W", ast);
+    }
+}
+
+static Int_t ast_to_int(env_t *env, ast_t *ast)
+{
+    type_t *t = get_type(env, ast);
+    switch (t->tag) {
+    case BigIntType: {
+        number_t num;
+        eval(env, ast, &num);
+        return num.integer;
+    }
+    case IntType: {
+        number_t num;
+        eval(env, ast, &num);
+        switch (Match(t, IntType)->bits) {
+        case TYPE_IBITS64: return Int$from_int64((int64_t)num.i64);
+        case TYPE_IBITS32: return Int$from_int32(num.i32);
+        case TYPE_IBITS16: return Int$from_int16(num.i16);
+        case TYPE_IBITS8: return Int$from_int8(num.i8);
+        default: errx(1, "Invalid int bits");
+        }
+    }
+    default: repl_err(NULL, "Cannot convert to integer");
+    }
+}
+
+static double ast_to_num(env_t *env, ast_t *ast)
+{
+    type_t *t = get_type(env, ast);
+    switch (t->tag) {
+    case BigIntType: case IntType: {
+        number_t num;
+        eval(env, ast, &num);
+        if (t->tag == BigIntType)
+            return Num$from_int(num.integer, false);
+        switch (Match(t, IntType)->bits) {
+        case TYPE_IBITS64: return Num$from_int64(num.i64, false);
+        case TYPE_IBITS32: return Num$from_int32(num.i32);
+        case TYPE_IBITS16: return Num$from_int16(num.i16);
+        case TYPE_IBITS8: return Num$from_int8(num.i8);
+        default: errx(1, "Invalid int bits");
+        }
+    }
+    case NumType: {
+        number_t num;
+        eval(env, ast, &num);
+        return Match(t, NumType)->bits == TYPE_NBITS32 ? (double)num.n32 : (double)num.n64;
+    }
+    default: repl_err(NULL, "Cannot convert to number");
+    }
+}
+
+static Text_t obj_to_text(type_t *t, const void *obj, bool use_color)
+{
+    const TypeInfo_t *info = type_to_type_info(t);
+    return generic_as_text(obj, use_color, info);
+}
+
+void run(env_t *env, ast_t *ast)
+{
+    switch (ast->tag) {
+    case Declare: {
+        auto decl = Match(ast, Declare);
+        const char *name = Match(decl->var, Var)->name;
+        type_t *type = get_type(env, decl->value);
+        repl_binding_t *binding = new(repl_binding_t, .type=type, .value=GC_MALLOC(type_size(type)));
+        eval(env, decl->value, binding->value);
+        Table$str_set(env->locals, name, binding);
+        break;
+    }
+    case Assign: {
+        auto assign = Match(ast, Assign);
+        int64_t n = 0;
+        for (ast_list_t *t = assign->targets; t; t = t->next)
+            ++n;
+        for (ast_list_t *val = assign->values, *target = assign->targets; val && target; val = val->next, target = target->next) {
+            type_t *t_target = get_type(env, target->ast);
+            type_t *t_val = get_type(env, val->ast);
+            if (!type_eq(t_val, t_target))
+                repl_err(target->ast, "This value has type %T but I expected a %T", t_val, t_target);
+
+            if (!can_be_mutated(env, target->ast)) {
+                if (target->ast->tag == Index || target->ast->tag == FieldAccess) {
+                    ast_t *subject = target->ast->tag == Index ? Match(target->ast, Index)->indexed : Match(target->ast, FieldAccess)->fielded;
+                    repl_err(subject, "This is an immutable value, you can't assign to it");
+                } else {
+                    repl_err(target->ast, "This is a value of type %T and can't be assigned to", get_type(env, target->ast));
+                }
+            }
+        }
+        for (ast_list_t *val = assign->values, *target = assign->targets; val && target; val = val->next, target = target->next) {
+            switch (target->ast->tag) {
+            case Var: {
+                void *dest = get_address(env, target->ast);
+                eval(env, val->ast, dest);
+                break;
+            }
+            // case Index: {
+            //     auto index = Match(target->ast, Index);
+            //     type_t *obj_t = get_type(env, index->indexed);
+            //     TypeInfo_t *table_info = type_to_type_info(t);
+            // }
+            default: errx(1, "Assignment not implemented: %W", target->ast);
+            }
+        }
+        break;
+    }
+    case DocTest: {
+        auto doctest = Match(ast, DocTest);
+        type_t *t = get_type(env, doctest->expr);
+        size_t size = t ? type_size(t) : 0;
+        if (size == 0) {
+            run(env, doctest->expr);
+        } else {
+            void *value = GC_MALLOC(size);
+            eval(env, doctest->expr, value);
+            Text_t text = obj_to_text(t, value, true);
+            printf("= %k \x1b[2m: %T\x1b[m\n", &text, t);
+            fflush(stdout);
+        }
+        break;
+    }
+    case Block: {
+        auto block = Match(ast, Block);
+        for (ast_list_t *stmt = block->statements; stmt; stmt = stmt->next) {
+            run(env, stmt->ast);
+        }
+        break;
+    }
+    // UpdateAssign,
+    // FunctionDef,
+    // For, While, If, When,
+    // Skip, Stop, Pass,
+    // Return,
+    // Extern,
+    // StructDef, EnumDef, LangDef,
+    // DocTest,
+    // Use,
+    // LinkerDirective,
+    // InlineCCode,
+    case If: {
+        auto if_ = Match(ast, If);
+        bool condition;
+        type_t *cond_t = get_type(env, if_->condition);
+        assert(cond_t->tag == BoolType);
+        eval(env, if_->condition, &condition);
+        if (condition) {
+            run(env, if_->body);
+        } else if (if_->else_body) {
+            run(env, if_->else_body);
+        }
+        break;
+    }
+    case While: {
+        auto while_ = Match(ast, While);
+        bool condition;
+        type_t *cond_t = get_type(env, while_->condition);
+        assert(cond_t->tag == BoolType);
+        for (;;) {
+            eval(env, while_->condition, &condition);
+            if (!condition) break;
+            run(env, while_->body);
+        }
+        break;
+    }
+    // case For: {
+    //     auto for_ = Match(ast, For);
+    // }
+    default: {
+        eval(env, ast, NULL);
+        break;
+    }
+    }
+}
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wstack-protector"
+void eval(env_t *env, ast_t *ast, void *dest)
+{
+    type_t *t = get_type(env, ast);
+    size_t size = type_size(t);
+    switch (ast->tag) {
+    case None:
+        if (dest) *(void**)dest = 0;
+        break;
+    case Bool:
+        if (dest) *(bool*)dest = Match(ast, Bool)->b;
+        break;
+    case Var: {
+        if (!dest) return;
+        repl_binding_t *b = get_repl_binding(env, Match(ast, Var)->name);
+        if (!b)
+            repl_err(ast, "No such variable: %s", Match(ast, Var)->name);
+        memcpy(dest, b->value, size);
+        break;
+    }
+    case Int: {
+        if (!dest) return;
+        *(Int_t*)dest = Int$parse(Text$from_str(Match(ast, Int)->str)); break;
+        break;
+    }
+    case Num: {
+        if (!dest) return;
+        *(double*)dest = Match(ast, Num)->n; break;
+        break;
+    }
+    case TextLiteral:
+        if (dest) *(CORD*)dest = Match(ast, TextLiteral)->cord;
+        break;
+    case TextJoin: {
+        CORD ret = CORD_EMPTY;
+        for (ast_list_t *chunk = Match(ast, TextJoin)->children; chunk; chunk = chunk->next) {
+            type_t *chunk_t = get_type(env, chunk->ast);
+            if (chunk_t->tag == TextType) {
+                CORD c;
+                eval(env, chunk->ast, &c);
+                ret = CORD_cat(ret, c);
+            } else {
+                size_t chunk_size = type_size(chunk_t);
+                char buf[chunk_size];
+                eval(env, chunk->ast, buf);
+                ret = CORD_cat(ret, Text$as_c_string(obj_to_text(chunk_t, buf, false)));
+            }
+        }
+        if (dest) *(CORD*)dest = ret;
+        break;
+    }
+    case BinaryOp: {
+        auto binop = Match(ast, BinaryOp);
+        if (t->tag == IntType || t->tag == BigIntType) {
+#define CASE_OP(OP_NAME, method_name) case BINOP_##OP_NAME: {\
+        Int_t lhs = ast_to_int(env, binop->lhs); \
+        Int_t rhs = ast_to_int(env, binop->rhs); \
+        Int_t result = Int$ ## method_name (lhs, rhs); \
+        if (t->tag == BigIntType) {\
+            *(Int_t*)dest = result; \
+            return; \
+        } \
+        switch (Match(t, IntType)->bits) { \
+        case 64: *(int64_t*)dest = Int64$from_int(result, false); return; \
+        case 32: *(int32_t*)dest = Int32$from_int(result, false); return; \
+        case 16: *(int16_t*)dest = Int16$from_int(result, false); return; \
+        case 8: *(int8_t*)dest = Int8$from_int(result, false); return; \
+        default: errx(1, "Invalid int bits"); \
+        } \
+        break; \
+    }
+            switch (binop->op) {
+            CASE_OP(MULT, times) CASE_OP(DIVIDE, divided_by) CASE_OP(PLUS, plus) CASE_OP(MINUS, minus)
+            CASE_OP(RSHIFT, right_shifted) CASE_OP(LSHIFT, left_shifted)
+            CASE_OP(MOD, modulo) CASE_OP(MOD1, modulo1)
+            CASE_OP(AND, bit_and) CASE_OP(OR, bit_or) CASE_OP(XOR, bit_xor)
+            default: break;
+            }
+#undef CASE_OP
+        } else if (t->tag == NumType) {
+#define CASE_OP(OP_NAME, C_OP) case BINOP_##OP_NAME: {\
+        double lhs = ast_to_num(env, binop->lhs); \
+        double rhs = ast_to_num(env, binop->rhs); \
+        if (Match(t, NumType)->bits == 64) \
+            *(double*)dest = (double)(lhs C_OP rhs); \
+        else \
+            *(float*)dest = (float)(lhs C_OP rhs); \
+        return; \
+    }
+            switch (binop->op) {
+            CASE_OP(MULT, *) CASE_OP(DIVIDE, /) CASE_OP(PLUS, +) CASE_OP(MINUS, -)
+            default: break;
+            }
+#undef CASE_OP
+        }
+        switch (binop->op) {
+        case BINOP_EQ: case BINOP_NE: case BINOP_LT: case BINOP_LE: case BINOP_GT: case BINOP_GE: {
+            type_t *t_lhs = get_type(env, binop->lhs);
+            if (!type_eq(t_lhs, get_type(env, binop->rhs)))
+                repl_err(ast, "Comparisons between different types aren't supported");
+            const TypeInfo_t *info = type_to_type_info(t_lhs);
+            size_t value_size = type_size(t_lhs);
+            char lhs[value_size], rhs[value_size];
+            eval(env, binop->lhs, lhs);
+            eval(env, binop->rhs, rhs);
+            int cmp = generic_compare(lhs, rhs, info);
+            switch (binop->op) {
+            case BINOP_EQ: *(bool*)dest = (cmp == 0); break;
+            case BINOP_NE: *(bool*)dest = (cmp != 0); break;
+            case BINOP_GT: *(bool*)dest = (cmp > 0); break;
+            case BINOP_GE: *(bool*)dest = (cmp >= 0); break;
+            case BINOP_LT: *(bool*)dest = (cmp < 0); break;
+            case BINOP_LE: *(bool*)dest = (cmp <= 0); break;
+            default: break;
+            }
+            break;
+        }
+        default: errx(1, "Binary op not implemented for %T: %W", t, ast);
+        }
+        break;
+    }
+    case Index: {
+        auto index = Match(ast, Index);
+        type_t *indexed_t = get_type(env, index->indexed);
+        // type_t *index_t = get_type(env, index->index);
+        switch (indexed_t->tag) {
+        case ArrayType: {
+            Array_t arr;
+            eval(env, index->indexed, &arr);
+            int64_t raw_index = Int64$from_int(ast_to_int(env, index->index), false);
+            int64_t index_int = raw_index;
+            if (index_int < 1) index_int = arr.length + index_int + 1;
+            if (index_int < 1 || index_int > arr.length)
+                repl_err(index->index, "%ld is an invalid index for an array with length %ld",
+                         raw_index, arr.length);
+            size_t item_size = type_size(Match(indexed_t, ArrayType)->item_type);
+            memcpy(dest, arr.data + arr.stride*(index_int-1), item_size);
+            break;
+        }
+        case TableType: {
+            Table_t table;
+            eval(env, index->indexed, &table);
+            type_t *key_type = Match(indexed_t, TableType)->key_type;
+            size_t key_size = type_size(key_type);
+            char key_buf[key_size];
+            eval(env, index->index, key_buf);
+            const TypeInfo_t *table_info = type_to_type_info(indexed_t);
+            memcpy(dest, Table$get(table, key_buf, table_info), key_size);
+            break;
+        }
+        case PointerType: {
+            auto ptr = Match(indexed_t, PointerType);
+            size_t pointed_size = type_size(ptr->pointed);
+            void *pointer;
+            eval(env, index->indexed, &pointer);
+            memcpy(dest, pointer, pointed_size);
+            break;
+        }
+        default: errx(1, "Indexing is not supported for %T", indexed_t);
+        }
+        break;
+    }
+    case Array: {
+        assert(t->tag == ArrayType);
+        Array_t arr = {};
+        size_t item_size = type_size(Match(t, ArrayType)->item_type);
+        char item_buf[item_size];
+        for (ast_list_t *item = Match(ast, Array)->items; item; item = item->next) {
+            eval(env, item->ast, item_buf);
+            Array$insert(&arr, item_buf, I(0), (int64_t)type_size(Match(t, ArrayType)->item_type));
+        }
+        memcpy(dest, &arr, sizeof(Array_t));
+        break;
+    }
+    case Table: {
+        assert(t->tag == TableType);
+        auto table_ast = Match(ast, Table);
+        Table_t table = {};
+        size_t key_size = type_size(Match(t, TableType)->key_type);
+        size_t value_size = type_size(Match(t, TableType)->value_type);
+        char key_buf[key_size];
+        char value_buf[value_size];
+        const TypeInfo_t *table_info = type_to_type_info(t);
+        assert(table_info->tag == TableInfo);
+        for (ast_list_t *entry = table_ast->entries; entry; entry = entry->next) {
+            auto e = Match(entry->ast, TableEntry);
+            eval(env, e->key, key_buf);
+            eval(env, e->value, value_buf);
+            Table$set(&table, key_buf, value_buf, table_info);
+        }
+        if (table_ast->fallback)
+            eval(env, table_ast->fallback, &table.fallback);
+        memcpy(dest, &table, sizeof(Table_t));
+        break;
+    }
+    case Block: {
+        auto block = Match(ast, Block);
+        for (ast_list_t *stmt = block->statements; stmt; stmt = stmt->next) {
+            if (stmt->next)
+                run(env, stmt->ast);
+            else
+                eval(env, stmt->ast, dest);
+        }
+        break;
+    }
+    default:
+        errx(1, "Eval not implemented for %W", ast);
+    }
+}
+#pragma GCC diagnostic pop
+
+// vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1,\:0