X-Git-Url: https://git.xonotic.org/?a=blobdiff_plain;f=parser.c;h=f95e7e087bdfc3784f1a36a493b3cddc57fe9759;hb=6b85f3d3702c3677bbb34b2af7d2b02a1201a1a1;hp=c753c59aa782325d9755fd195ec837a57d1ecd31;hpb=4f611475de9b371b1a02aa6eff215c7d6c87085d;p=xonotic%2Fgmqcc.git

diff --git a/parser.c b/parser.c
index c753c59..f95e7e0 100644
--- a/parser.c
+++ b/parser.c
@@ -1,24 +1,884 @@
+#include <stdio.h>
+#include <stdarg.h>
+
 #include "gmqcc.h"
 #include "lexer.h"
 
 typedef struct {
     lex_file *lex;
     int      tok;
+
+    MEM_VECTOR_MAKE(ast_value*, globals);
+    MEM_VECTOR_MAKE(ast_function*, functions);
+    MEM_VECTOR_MAKE(ast_value*, imm_float);
+
+    ast_function *function;
+    MEM_VECTOR_MAKE(ast_value*, locals);
+    size_t blocklocal;
 } parser_t;
 
-bool parser_do(parser_t *parser)
+MEM_VEC_FUNCTIONS(parser_t, ast_value*, globals)
+MEM_VEC_FUNCTIONS(parser_t, ast_value*, imm_float)
+MEM_VEC_FUNCTIONS(parser_t, ast_value*, locals)
+MEM_VEC_FUNCTIONS(parser_t, ast_function*, functions)
+
+void parseerror(parser_t *parser, const char *fmt, ...)
+{
+	va_list ap;
+
+    if (parser)
+	    printf("error %s:%lu: ", parser->lex->tok->ctx.file, (unsigned long)parser->lex->tok->ctx.line);
+	else
+	    printf("error: ");
+
+	va_start(ap, fmt);
+	vprintf(fmt, ap);
+	va_end(ap);
+
+	printf("\n");
+}
+
+bool parser_next(parser_t *parser)
+{
+    /* lex_do kills the previous token */
+    parser->tok = lex_do(parser->lex);
+    if (parser->tok == TOKEN_EOF || parser->tok >= TOKEN_ERROR)
+        return false;
+    return true;
+}
+
+/* lift a token out of the parser so it's not destroyed by parser_next */
+token *parser_lift(parser_t *parser)
+{
+    token *tok = parser->lex->tok;
+    parser->lex->tok = NULL;
+    return tok;
+}
+
+#define parser_tokval(p) (p->lex->tok->value)
+#define parser_token(p)  (p->lex->tok)
+#define parser_ctx(p)    (p->lex->tok->ctx)
+
+ast_value* parser_const_float(parser_t *parser, double d)
+{
+    size_t i;
+    ast_value *out;
+    for (i = 0; i < parser->imm_float_count; ++i) {
+        if (parser->imm_float[i]->constval.vfloat == d)
+            return parser->imm_float[i];
+    }
+    out = ast_value_new(parser_ctx(parser), "#IMMEDIATE", TYPE_FLOAT);
+    out->isconst = true;
+    out->constval.vfloat = d;
+    if (!parser_t_imm_float_add(parser, out)) {
+        ast_value_delete(out);
+        return NULL;
+    }
+    return out;
+}
+
+ast_value* parser_find_global(parser_t *parser, const char *name)
+{
+    size_t i;
+    for (i = 0; i < parser->globals_count; ++i) {
+        if (!strcmp(parser->globals[i]->name, name))
+            return parser->globals[i];
+    }
+    return NULL;
+}
+
+ast_value* parser_find_local(parser_t *parser, const char *name, size_t upto)
+{
+    size_t i;
+    ast_value *fun;
+    for (i = parser->locals_count; i > upto;) {
+        --i;
+        if (!strcmp(parser->locals[i]->name, name))
+            return parser->locals[i];
+    }
+    fun = parser->function->vtype;
+    for (i = 0; i < fun->params_count; ++i) {
+        if (!strcmp(fun->params[i]->name, name))
+            return fun->params[i];
+    }
+    return NULL;
+}
+
+ast_value* parser_find_var(parser_t *parser, const char *name)
+{
+    ast_value *v;
+    v         = parser_find_local(parser, name, 0);
+    if (!v) v = parser_find_global(parser, name);
+    return v;
+}
+
+typedef struct {
+    MEM_VECTOR_MAKE(ast_value*, p);
+} paramlist_t;
+MEM_VEC_FUNCTIONS(paramlist_t, ast_value*, p)
+
+static ast_value *parser_parse_type(parser_t *parser, int basetype, bool *isfunc)
+{
+    paramlist_t params;
+    ast_value *var;
+    lex_ctx   ctx = parser_ctx(parser);
+    int vtype = basetype;
+    int temptype;
+    size_t i;
+
+    MEM_VECTOR_INIT(&params, p);
+
+    *isfunc = false;
+
+    if (parser->tok == '(') {
+        *isfunc = true;
+        while (true) {
+            ast_value *param;
+            bool dummy;
+
+            if (!parser_next(parser))
+                goto on_error;
+
+            if (parser->tok == ')')
+                break;
+
+            temptype = parser_token(parser)->constval.t;
+            if (!parser_next(parser))
+                goto on_error;
+
+            param = parser_parse_type(parser, temptype, &dummy);
+            (void)dummy;
+
+            if (!param)
+                goto on_error;
+
+            if (parser->tok == TOKEN_IDENT) {
+                /* named parameter */
+                if (!ast_value_set_name(param, parser_tokval(parser)))
+                    goto on_error;
+                if (!parser_next(parser))
+                    goto on_error;
+            }
+
+            if (!paramlist_t_p_add(&params, param)) {
+                parseerror(parser, "Out of memory while parsing typename");
+                goto on_error;
+            }
+
+            if (parser->tok == ',')
+                continue;
+            if (parser->tok == ')')
+                break;
+            parseerror(parser, "Unexpected token");
+            goto on_error;
+        }
+        if (!parser_next(parser))
+            goto on_error;
+    }
+
+    var = ast_value_new(ctx, "<unnamed>", vtype);
+    if (!var)
+        goto on_error;
+    MEM_VECTOR_MOVE(&params, p, var, params);
+    return var;
+on_error:
+    for (i = 0; i < params.p_count; ++i)
+        ast_value_delete(params.p[i]);
+    MEM_VECTOR_CLEAR(&params, p);
+    return NULL;
+}
+
+typedef struct
+{
+    size_t etype; /* 0 = expression, others are operators */
+    int             paren;
+    ast_expression *out;
+    ast_value      *value; /* need to know if we can assign */
+    lex_ctx ctx;
+} sy_elem;
+typedef struct
+{
+    MEM_VECTOR_MAKE(sy_elem, out);
+    MEM_VECTOR_MAKE(sy_elem, ops);
+} shunt;
+MEM_VEC_FUNCTIONS(shunt, sy_elem, out)
+MEM_VEC_FUNCTIONS(shunt, sy_elem, ops)
+
+static sy_elem syexp(lex_ctx ctx, ast_expression *v) {
+    sy_elem e;
+    e.etype = 0;
+    e.out   = v;
+    e.value = NULL;
+    e.ctx   = ctx;
+    e.paren = 0;
+    return e;
+}
+static sy_elem syval(lex_ctx ctx, ast_value *v) {
+    sy_elem e;
+    e.etype = 0;
+    e.out   = (ast_expression*)v;
+    e.value = v;
+    e.ctx   = ctx;
+    e.paren = 0;
+    return e;
+}
+
+static sy_elem syop(lex_ctx ctx, const oper_info *op) {
+    sy_elem e;
+    e.etype = 1 + (op - operators);
+    e.out   = NULL;
+    e.value = NULL;
+    e.ctx   = ctx;
+    e.paren = 0;
+    return e;
+}
+
+static sy_elem syparen(lex_ctx ctx, int p) {
+    sy_elem e;
+    e.etype = 0;
+    e.out   = NULL;
+    e.value = NULL;
+    e.ctx   = ctx;
+    e.paren = p;
+    return e;
+}
+
+static bool parser_sy_pop(parser_t *parser, shunt *sy)
+{
+    const oper_info *op;
+    lex_ctx ctx;
+    ast_expression *out = NULL;
+    ast_expression *exprs[3];
+    ast_value      *vars[3];
+    size_t i;
+
+    if (!sy->ops_count) {
+        parseerror(parser, "internal error: missing operator");
+        return false;
+    }
+
+    if (sy->ops[sy->ops_count-1].paren) {
+        parseerror(parser, "unmatched parenthesis");
+        return false;
+    }
+
+    op = &operators[sy->ops[sy->ops_count-1].etype - 1];
+    ctx = sy->ops[sy->ops_count-1].ctx;
+
+    if (sy->out_count < op->operands) {
+        parseerror(parser, "internal error: not enough operands: %i", sy->out_count);
+        return false;
+    }
+
+    sy->ops_count--;
+
+    sy->out_count -= op->operands;
+    for (i = 0; i < op->operands; ++i) {
+        exprs[i] = sy->out[sy->out_count+i].out;
+        vars[i]  = sy->out[sy->out_count+i].value;
+    }
+
+    switch (op->id)
+    {
+        default:
+            parseerror(parser, "internal error: unhandled operand");
+            return false;
+
+        case opid1('+'):
+            if (exprs[0]->expression.vtype != exprs[1]->expression.vtype) {
+                parseerror(parser, "Cannot add type %s and %s",
+                           type_name[exprs[0]->expression.vtype],
+                           type_name[exprs[1]->expression.vtype]);
+                return false;
+            }
+            switch (exprs[0]->expression.vtype) {
+                case TYPE_FLOAT:
+                    out = (ast_expression*)ast_binary_new(ctx, INSTR_ADD_F, exprs[0], exprs[1]);
+                    break;
+                case TYPE_VECTOR:
+                    out = (ast_expression*)ast_binary_new(ctx, INSTR_ADD_V, exprs[0], exprs[1]);
+                    break;
+                default:
+                    parseerror(parser, "Cannot add type %s and %s",
+                               type_name[exprs[0]->expression.vtype],
+                               type_name[exprs[1]->expression.vtype]);
+                    return false;
+            };
+            break;
+        case opid1('-'):
+            if (exprs[0]->expression.vtype != exprs[1]->expression.vtype) {
+                parseerror(parser, "Cannot subtract type %s from %s",
+                           type_name[exprs[1]->expression.vtype],
+                           type_name[exprs[0]->expression.vtype]);
+                return false;
+            }
+            switch (exprs[0]->expression.vtype) {
+                case TYPE_FLOAT:
+                    out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_F, exprs[0], exprs[1]);
+                    break;
+                case TYPE_VECTOR:
+                    out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_V, exprs[0], exprs[1]);
+                    break;
+                default:
+                    parseerror(parser, "Cannot add type %s from %s",
+                               type_name[exprs[1]->expression.vtype],
+                               type_name[exprs[0]->expression.vtype]);
+                    return false;
+            };
+            break;
+        case opid1('*'):
+            if (exprs[0]->expression.vtype != exprs[1]->expression.vtype &&
+                exprs[0]->expression.vtype != TYPE_VECTOR &&
+                exprs[0]->expression.vtype != TYPE_FLOAT &&
+                exprs[1]->expression.vtype != TYPE_VECTOR &&
+                exprs[1]->expression.vtype != TYPE_FLOAT)
+            {
+                parseerror(parser, "Cannot multiply type %s from %s",
+                           type_name[exprs[1]->expression.vtype],
+                           type_name[exprs[0]->expression.vtype]);
+                return false;
+            }
+            switch (exprs[0]->expression.vtype) {
+                case TYPE_FLOAT:
+                    if (exprs[1]->expression.vtype == TYPE_VECTOR)
+                        out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_FV, exprs[0], exprs[1]);
+                    else
+                        out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_F, exprs[0], exprs[1]);
+                    break;
+                case TYPE_VECTOR:
+                    if (exprs[1]->expression.vtype == TYPE_FLOAT)
+                        out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_VF, exprs[0], exprs[1]);
+                    else
+                        out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_V, exprs[0], exprs[1]);
+                    break;
+                default:
+                    parseerror(parser, "Cannot add type %s from %s",
+                               type_name[exprs[1]->expression.vtype],
+                               type_name[exprs[0]->expression.vtype]);
+                    return false;
+            };
+            break;
+        case opid1('/'):
+            if (exprs[0]->expression.vtype != exprs[1]->expression.vtype ||
+                exprs[0]->expression.vtype != TYPE_FLOAT)
+            {
+                parseerror(parser, "Cannot divide types %s and %s",
+                           type_name[exprs[0]->expression.vtype],
+                           type_name[exprs[1]->expression.vtype]);
+                return false;
+            }
+            out = (ast_expression*)ast_binary_new(ctx, INSTR_DIV_F, exprs[0], exprs[1]);
+            break;
+
+
+        case opid1('='):
+            if (!vars[0]) {
+                parseerror(parser, "Cannot assign to non-variable");
+                return false;
+            }
+            out = (ast_expression*)ast_store_new(ctx,
+                                                 type_store_instr[vars[0]->expression.vtype],
+                                                 vars[0], exprs[1]);
+            break;
+    }
+
+    if (!out) {
+        parseerror(parser, "failed to apply operand %s", op->op);
+        return false;
+    }
+
+    sy->out[sy->out_count++] = syexp(ctx, out);
+    return true;
+}
+
+static bool parser_close_paren(parser_t *parser, shunt *sy)
+{
+    if (!sy->ops_count) {
+        parseerror(parser, "unmatched closing paren");
+        return false;
+    }
+    if (sy->ops[sy->ops_count-1].paren == 1) {
+        parseerror(parser, "empty parenthesis expression");
+        return false;
+    }
+    while (sy->ops_count) {
+        if (sy->ops[sy->ops_count-1].paren == 1) {
+            sy->ops_count--;
+            break;
+        }
+        if (!parser_sy_pop(parser, sy))
+            return false;
+    }
+    return true;
+}
+
+static ast_expression* parser_expression(parser_t *parser)
+{
+    ast_expression *expr = NULL;
+    shunt sy;
+    bool wantop = false;
+
+    MEM_VECTOR_INIT(&sy, out);
+    MEM_VECTOR_INIT(&sy, ops);
+
+    while (true)
+    {
+        if (!wantop)
+        {
+            bool nextwant = true;
+            if (parser->tok == TOKEN_IDENT)
+            {
+                /* variable */
+                ast_value *var = parser_find_var(parser, parser_tokval(parser));
+                if (!var) {
+                    parseerror(parser, "unexpected ident: %s", parser_tokval(parser));
+                    goto onerr;
+                }
+                if (!shunt_out_add(&sy, syval(parser_ctx(parser), var))) {
+                    parseerror(parser, "out of memory");
+                    goto onerr;
+                }
+            }
+            else if (parser->tok == TOKEN_FLOATCONST) {
+                ast_value *val = parser_const_float(parser, (parser_token(parser)->constval.f));
+                if (!val)
+                    return false;
+                if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
+                    parseerror(parser, "out of memory");
+                    goto onerr;
+                }
+            }
+            else if (parser->tok == TOKEN_INTCONST) {
+                ast_value *val = parser_const_float(parser, (double)(parser_token(parser)->constval.i));
+                if (!val)
+                    return false;
+                if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
+                    parseerror(parser, "out of memory");
+                    goto onerr;
+                }
+            }
+            else if (parser->tok == '(') {
+                nextwant = false; /* not expecting an operator next */
+                if (!shunt_ops_add(&sy, syparen(parser_ctx(parser), 1))) {
+                    parseerror(parser, "out of memory");
+                    goto onerr;
+                }
+            }
+            else {
+                /* TODO: prefix operators */
+                parseerror(parser, "expected statement");
+                goto onerr;
+            }
+            wantop = nextwant;
+            parser->lex->flags.noops = !wantop;
+        } else {
+            if (parser->tok == '(') {
+                /* we expected an operator, this is the function-call operator */
+                if (!shunt_ops_add(&sy, syparen(parser_ctx(parser), 'f'))) {
+                    parseerror(parser, "out of memory");
+                    goto onerr;
+                }
+            }
+            else if (parser->tok == ')') {
+                /* we do expect an operator next */
+                /* closing an opening paren */
+                if (!parser_close_paren(parser, &sy))
+                    goto onerr;
+            }
+            else if (parser->tok != TOKEN_OPERATOR) {
+                parseerror(parser, "expected operator or end of statement");
+                goto onerr;
+            }
+            else {
+                /* classify the operator */
+                /* TODO: suffix operators */
+                const oper_info *op;
+                const oper_info *olast = NULL;
+                size_t o;
+                for (o = 0; o < operator_count; ++o) {
+                    if (!(operators[o].flags & OP_PREFIX) &&
+                        !(operators[o].flags & OP_SUFFIX) && /* remove this */
+                        !strcmp(parser_tokval(parser), operators[o].op))
+                    {
+                        break;
+                    }
+                }
+                if (o == operator_count) {
+                    /* no operator found... must be the end of the statement */
+                    break;
+                }
+                /* found an operator */
+                op = &operators[o];
+
+                if (sy.ops_count && !sy.ops[sy.ops_count-1].paren)
+                    olast = &operators[sy.ops[sy.ops_count-1].etype-1];
+
+                while (olast && (
+                        (op->prec < olast->prec) ||
+                        (op->assoc == ASSOC_LEFT && op->prec <= olast->prec) ) )
+                {
+                    if (!parser_sy_pop(parser, &sy))
+                        goto onerr;
+                    if (sy.ops_count && !sy.ops[sy.ops_count-1].paren)
+                        olast = &operators[sy.ops[sy.ops_count-1].etype-1];
+                }
+
+                if (!shunt_ops_add(&sy, syop(parser_ctx(parser), op)))
+                    goto onerr;
+            }
+            wantop = false;
+            parser->lex->flags.noops = true;
+        }
+        if (!parser_next(parser)) {
+            goto onerr;
+        }
+        if (parser->tok == ';') {
+            break;
+        }
+    }
+    if (!parser_next(parser)) {
+        parseerror(parser, "Unexpected end of file");
+        goto onerr;
+    }
+
+    while (sy.ops_count) {
+        if (!parser_sy_pop(parser, &sy))
+            goto onerr;
+    }
+
+    parser->lex->flags.noops = true;
+    if (!sy.out_count) {
+        parseerror(parser, "empty expression");
+        expr = NULL;
+    } else
+        expr = sy.out[0].out;
+    MEM_VECTOR_CLEAR(&sy, out);
+    MEM_VECTOR_CLEAR(&sy, ops);
+    return expr;
+
+onerr:
+    parser->lex->flags.noops = true;
+    MEM_VECTOR_CLEAR(&sy, out);
+    MEM_VECTOR_CLEAR(&sy, ops);
+    return NULL;
+}
+
+static bool parser_variable(parser_t *parser, ast_block *localblock);
+static bool parser_body_do(parser_t *parser, ast_block *block)
+{
+    if (parser->tok == TOKEN_TYPENAME)
+    {
+        /* local variable */
+        if (!parser_variable(parser, block))
+            return false;
+        return true;
+    }
+    else if (parser->tok == TOKEN_KEYWORD)
+    {
+        if (!strcmp(parser_tokval(parser), "return"))
+        {
+            ast_expression *exp;
+            ast_return *ret;
+
+            if (!parser_next(parser)) {
+                parseerror(parser, "expected return expression");
+                return false;
+            }
+
+            exp = parser_expression(parser);
+            if (!exp)
+                return false;
+            ret = ast_return_new(exp->expression.node.context, exp);
+            if (!ret) {
+                ast_delete(exp);
+                return false;
+            }
+            if (!ast_block_exprs_add(block, (ast_expression*)ret)) {
+                ast_delete(ret);
+                return false;
+            }
+            return true;
+        }
+        parseerror(parser, "Unexpected keyword");
+        return false;
+    }
+    else if (parser->tok == '{')
+    {
+        /* a block */
+        parseerror(parser, "TODO: inner blocks: %s", parser_tokval(parser));
+        return false;
+    }
+    else
+    {
+        ast_expression *exp = parser_expression(parser);
+        if (!exp)
+            return false;
+        if (!ast_block_exprs_add(block, exp)) {
+            ast_delete(exp);
+            return false;
+        }
+        return true;
+    }
+}
+
+static ast_block* parser_parse_block(parser_t *parser)
+{
+    size_t oldblocklocal;
+    ast_block *block = NULL;
+
+    oldblocklocal = parser->blocklocal;
+    parser->blocklocal = parser->locals_count;
+
+    if (!parser_next(parser)) { /* skip the '{' */
+        parseerror(parser, "expected function body");
+        goto cleanup;
+    }
+
+    block = ast_block_new(parser_ctx(parser));
+
+    while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
+    {
+        if (parser->tok == '}')
+            break;
+
+        if (!parser_body_do(parser, block)) {
+            ast_block_delete(block);
+            block = NULL;
+            goto cleanup;
+        }
+    }
+
+    if (parser->tok != '}') {
+        ast_block_delete(block);
+        block = NULL;
+    } else {
+        (void)parser_next(parser);
+    }
+
+cleanup:
+    parser->blocklocal = oldblocklocal;
+    return block;
+}
+
+static bool parser_variable(parser_t *parser, ast_block *localblock)
+{
+    bool          isfunc = false;
+    ast_function *func = NULL;
+    lex_ctx       ctx;
+    ast_value    *var;
+
+    int basetype = parser_token(parser)->constval.t;
+
+    while (true)
+    {
+        if (!parser_next(parser)) { /* skip basetype or comma */
+            parseerror(parser, "expected variable declaration");
+            return false;
+        }
+
+        isfunc = false;
+        func = NULL;
+        ctx = parser_ctx(parser);
+        var = parser_parse_type(parser, basetype, &isfunc);
+
+        if (!var)
+            return false;
+
+        if (parser->tok != TOKEN_IDENT) {
+            parseerror(parser, "expected variable name\n");
+            return false;
+        }
+
+        if (!localblock && parser_find_global(parser, parser_tokval(parser))) {
+            ast_value_delete(var);
+            parseerror(parser, "global already exists: %s\n", parser_tokval(parser));
+            return false;
+        }
+
+        if (localblock && parser_find_local(parser, parser_tokval(parser), parser->blocklocal)) {
+            ast_value_delete(var);
+            parseerror(parser, "local variable already exists: %s\n", parser_tokval(parser));
+            return false;
+        }
+
+        if (!ast_value_set_name(var, parser_tokval(parser))) {
+            parseerror(parser, "failed to set variable name\n");
+            ast_value_delete(var);
+            return false;
+        }
+
+        if (isfunc) {
+            /* a function was defined */
+            ast_value *fval;
+
+            /* turn var into a value of TYPE_FUNCTION, with the old var
+             * as return type
+             */
+            fval = ast_value_new(ctx, var->name, TYPE_FUNCTION);
+            func = ast_function_new(ctx, var->name, fval);
+            if (!fval || !func) {
+                ast_value_delete(var);
+                if (fval) ast_value_delete(fval);
+                if (func) ast_function_delete(func);
+                return false;
+            }
+
+            fval->expression.next = (ast_expression*)var;
+            MEM_VECTOR_MOVE(var, params, fval, params);
+
+            if (!parser_t_functions_add(parser, func)) {
+                ast_value_delete(var);
+                if (fval) ast_value_delete(fval);
+                if (func) ast_function_delete(func);
+                return false;
+            }
+
+            var = fval;
+        }
+
+        if ( (!localblock && !parser_t_globals_add(parser, var)) ||
+             ( localblock && !parser_t_locals_add(parser, var)) )
+        {
+            ast_value_delete(var);
+            return false;
+        }
+        if (localblock && !ast_block_locals_add(localblock, var))
+        {
+            parser->locals_count--;
+            ast_value_delete(var);
+            return false;
+        }
+
+        if (!parser_next(parser)) {
+            ast_value_delete(var);
+            return false;
+        }
+
+        if (parser->tok == ';') {
+            if (!parser_next(parser))
+                return parser->tok == TOKEN_EOF;
+            return true;
+        }
+
+        if (parser->tok == ',') {
+            /* another var */
+            continue;
+        }
+
+        if (parser->tok != '=') {
+            parseerror(parser, "expected '=' or ';'");
+            return false;
+        }
+
+        if (!parser_next(parser))
+            return false;
+
+        if (parser->tok == '#') {
+            if (localblock) {
+                parseerror(parser, "cannot declare builtins within functions");
+                return false;
+            }
+            if (!isfunc || !func) {
+                parseerror(parser, "unexpected builtin number, '%s' is not a function", var->name);
+                return false;
+            }
+            if (!parser_next(parser)) {
+                parseerror(parser, "expected builtin number");
+                return false;
+            }
+            if (parser->tok != TOKEN_INTCONST) {
+                parseerror(parser, "builtin number must be an integer constant");
+                return false;
+            }
+            if (parser_token(parser)->constval.i <= 0) {
+                parseerror(parser, "builtin number must be positive integer greater than zero");
+                return false;
+            }
+
+            func->builtin = -parser_token(parser)->constval.i;
+        } else if (parser->tok == '{') {
+            /* function body */
+            ast_block *block;
+            ast_function *old = parser->function;
+
+            if (localblock) {
+                parseerror(parser, "cannot declare functions within functions");
+                return false;
+            }
+
+            parser->function = func;
+            block = parser_parse_block(parser);
+            parser->function = old;
+
+            if (!block)
+                return false;
+
+            if (!ast_function_blocks_add(func, block)) {
+                ast_block_delete(block);
+                return false;
+            }
+            return true;
+        } else {
+            parseerror(parser, "TODO, const assignment");
+        }
+
+        if (!parser_next(parser))
+            return false;
+
+        if (parser->tok == ',') {
+            /* another */
+            continue;
+        }
+
+        if (parser->tok != ';') {
+            parseerror(parser, "expected semicolon");
+            return false;
+        }
+
+        (void)parser_next(parser);
+
+        return true;
+    }
+}
+
+static bool parser_do(parser_t *parser)
 {
+    if (parser->tok == TOKEN_TYPENAME)
+    {
+        return parser_variable(parser, NULL);
+    }
+    else if (parser->tok == TOKEN_KEYWORD)
+    {
+        /* handle 'var' and 'const' */
+        return false;
+    }
+    else if (parser->tok == '.')
+    {
+        /* entity-member declaration */
+        return false;
+    }
+    else
+    {
+        parseerror(parser, "unexpected token: %s", parser->lex->tok->value);
+        return false;
+    }
     return true;
 }
 
 bool parser_compile(const char *filename)
 {
+    size_t i;
     parser_t *parser;
+    ir_builder *ir;
 
     parser = (parser_t*)mem_a(sizeof(parser_t));
     if (!parser)
         return false;
 
+    memset(parser, 0, sizeof(parser));
+
+    MEM_VECTOR_INIT(parser, globals);
+    MEM_VECTOR_INIT(parser, locals);
     parser->lex = lex_open(filename);
 
     if (!parser->lex) {
@@ -26,19 +886,60 @@ bool parser_compile(const char *filename)
         return false;
     }
 
-    for (parser->tok = lex_do(parser->lex);
-         parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR;
-         parser->tok = lex_do(parser->lex))
+    /* initial lexer/parser state */
+    parser->lex->flags.noops = true;
+
+    if (parser_next(parser))
     {
-        if (!parser_do(parser)) {
-            printf("parse error\n");
-            lex_close(parser->lex);
-            mem_d(parser);
-            return false;
+        while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
+        {
+            if (!parser_do(parser)) {
+                if (parser->tok == TOKEN_EOF)
+                    parseerror(parser, "unexpected eof");
+                else
+                    parseerror(parser, "parse error\n");
+                lex_close(parser->lex);
+                mem_d(parser);
+                return false;
+            }
         }
     }
 
     lex_close(parser->lex);
+
+    ir = ir_builder_new("gmqcc_out");
+    if (!ir) {
+        printf("failed to allocate builder\n");
+        goto cleanup;
+    }
+
+    for (i = 0; i < parser->imm_float_count; ++i) {
+        if (!ast_global_codegen(parser->imm_float[i], ir)) {
+            printf("failed to generate global %s\n", parser->imm_float[i]->name);
+        }
+    }
+    for (i = 0; i < parser->globals_count; ++i) {
+        if (!ast_global_codegen(parser->globals[i], ir)) {
+            printf("failed to generate global %s\n", parser->globals[i]->name);
+        }
+    }
+    for (i = 0; i < parser->functions_count; ++i) {
+        if (!ast_function_codegen(parser->functions[i], ir)) {
+            printf("failed to generate function %s\n", parser->functions[i]->name);
+        }
+        if (!ir_function_finalize(parser->functions[i]->ir_func)) {
+            printf("failed to finalize function %s\n", parser->functions[i]->name);
+        }
+    }
+
+    ir_builder_dump(ir, printf);
+
+cleanup:
+    for (i = 0; i < parser->globals_count; ++i) {
+        ast_value_delete(parser->globals[i]);
+    }
+    MEM_VECTOR_CLEAR(parser, globals);
+
     mem_d(parser);
     return true;
 }