move ast printing functions to ast_printer.zig
This commit is contained in:
parent
a3127c76e7
commit
45ae160b76
4 changed files with 198 additions and 193 deletions
190
src/ast.zig
190
src/ast.zig
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@ -200,193 +200,3 @@ pub fn mkRoot(allocator: *std.mem.Allocator) !*Node {
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node.* = Node{ .Root = NodeList.init(allocator) };
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return node;
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}
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// TODO move those functions to src/ast_print.zig
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fn printIdent(ident: usize) void {
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var i: usize = 0;
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while (i < ident) : (i += 1) {
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std.debug.warn("\t");
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}
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}
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fn print(ident: usize, comptime fmt: []const u8, args: ...) void {
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printIdent(ident);
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std.debug.warn(fmt, args);
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}
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fn printBlock(ident: usize, block: var, endNewline: bool) void {
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std.debug.warn("(\n");
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for (block.toSlice()) |stmt| {
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printIdent(ident);
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printStmt(ident, stmt);
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std.debug.warn("\n");
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}
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if (endNewline) {
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print(ident - 1, ")\n");
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} else {
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print(ident - 1, ")");
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}
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}
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pub fn printNode(node: *Node, ident: usize) void {
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switch (node.*) {
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.FnDecl => |decl| {
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print(ident, "(fn {} (", decl.func_name.lexeme);
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for (decl.params.toSlice()) |param| {
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std.debug.warn("({} {}) ", param.name.lexeme, param.typ.lexeme);
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}
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printBlock(ident + 1, decl.body, false);
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std.debug.warn(")\n");
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},
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.ConstDecl => |consts| {
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print(ident, "(const (\n");
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for (consts.toSlice()) |const_decl| {
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print(
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ident + 1,
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"({} ",
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const_decl.name.lexeme,
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);
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printExpr(const_decl.expr);
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std.debug.warn(")\n");
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}
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print(ident, "))\n");
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},
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.Root => {
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for (node.Root.toSlice()) |child| {
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printNode(child, ident + 1);
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}
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},
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.Expr => |expr| {
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printIdent(ident);
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printExpr(expr);
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std.debug.warn("\n");
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},
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.Stmt => |stmt| blk: {
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printIdent(ident);
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printStmt(ident, stmt);
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std.debug.warn("\n");
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},
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else => {
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print(ident, "unknown node: {}\n", node);
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},
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}
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}
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fn parenthetize(name: []const u8, exprs: []*Expr) void {
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std.debug.warn("({}", name);
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for (exprs) |expr| {
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std.debug.warn(" ");
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printExpr(expr);
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}
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std.debug.warn(")");
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}
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pub fn printExpr(expr: *Expr) void {
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switch (expr.*) {
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.Binary => |binary| parenthetize(binary.op.lexeme, &[_]*Expr{ binary.left, binary.right }),
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.Logical => |binary| parenthetize(binary.op.lexeme, &[_]*Expr{ binary.left, binary.right }),
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.Unary => |unary| parenthetize(unary.op.lexeme, &[_]*Expr{unary.right}),
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.Grouping => |expr_ptr| parenthetize("group", &[_]*Expr{expr_ptr}),
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.Literal => |literal| {
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switch (literal) {
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.Bool => |val| std.debug.warn("{}", val),
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.Integer => |val| std.debug.warn("{}", val),
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.Float => |val| std.debug.warn("{}", val),
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.String => |val| std.debug.warn("'{}'", val),
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}
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},
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.Variable => |token| std.debug.warn("{}", token.lexeme),
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.VarDecl => |decl| {
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if (decl.mutable) {
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std.debug.warn("(mut ");
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} else {
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std.debug.warn("(");
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}
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std.debug.warn("let {} ", decl.assign.name.lexeme);
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printExpr(decl.assign.value);
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std.debug.warn(")");
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},
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.Assign => |assign| {
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std.debug.warn("(set ");
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std.debug.warn("{} ", assign.name.lexeme);
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printExpr(assign.value);
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std.debug.warn(")");
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},
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.Call => |call| {
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std.debug.warn("(");
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printExpr(call.callee);
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for (call.arguments.toSlice()) |arg| {
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std.debug.warn(" ");
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printExpr(arg);
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}
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std.debug.warn(")");
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},
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else => std.debug.warn("UnknownExpr-{}", @tagName(expr.*)),
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}
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}
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pub fn printStmt(ident: usize, stmt: *Stmt) void {
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switch (stmt.*) {
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.Println => |expr| parenthetize("println", &[_]*Expr{expr}),
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.Expr => |expr| printExpr(expr),
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.If => |ifstmt| {
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std.debug.warn("(if ");
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printExpr(ifstmt.condition);
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std.debug.warn(" ");
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printBlock(ident + 1, ifstmt.then_branch, false);
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if (ifstmt.else_branch) |else_branch| {
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std.debug.warn(" else ");
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printBlock(ident + 1, else_branch, false);
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}
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std.debug.warn(")\n");
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},
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.Loop => |loop| {
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std.debug.warn("(loop ");
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if (loop.condition) |cond| {
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printExpr(cond);
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} else {
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std.debug.warn("true");
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}
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std.debug.warn(" ");
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printBlock(ident + 1, loop.then_branch, false);
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std.debug.warn(")\n");
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},
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.Return => |ret| {
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std.debug.warn("(return ");
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printExpr(ret.value);
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std.debug.warn(")\n");
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},
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else => std.debug.warn("UnknownStmt-{}", @tagName(stmt.*)),
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}
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}
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193
src/ast_printer.zig
Normal file
193
src/ast_printer.zig
Normal file
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@ -0,0 +1,193 @@
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const std = @import("std");
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const tokens = @import("tokens.zig");
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const Token = tokens.Token;
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usingnamespace @import("ast.zig");
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fn printIdent(ident: usize) void {
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var i: usize = 0;
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while (i < ident) : (i += 1) {
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std.debug.warn("\t");
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}
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}
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fn print(ident: usize, comptime fmt: []const u8, args: ...) void {
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printIdent(ident);
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std.debug.warn(fmt, args);
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}
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fn printBlock(ident: usize, block: var, endNewline: bool) void {
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std.debug.warn("(\n");
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for (block.toSlice()) |stmt| {
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printIdent(ident);
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printStmt(ident, stmt);
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std.debug.warn("\n");
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}
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if (endNewline) {
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print(ident - 1, ")\n");
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} else {
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print(ident - 1, ")");
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}
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}
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pub fn printNode(node: *Node, ident: usize) void {
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switch (node.*) {
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.FnDecl => |decl| {
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print(ident, "(fn {} (", decl.func_name.lexeme);
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for (decl.params.toSlice()) |param| {
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std.debug.warn("({} {}) ", param.name.lexeme, param.typ.lexeme);
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}
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printBlock(ident + 1, decl.body, false);
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std.debug.warn(")\n");
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},
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.ConstDecl => |consts| {
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print(ident, "(const (\n");
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for (consts.toSlice()) |const_decl| {
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print(
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ident + 1,
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"({} ",
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const_decl.name.lexeme,
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);
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printExpr(const_decl.expr);
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std.debug.warn(")\n");
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}
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print(ident, "))\n");
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},
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.Root => {
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for (node.Root.toSlice()) |child| {
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printNode(child, ident + 1);
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}
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},
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.Expr => |expr| {
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printIdent(ident);
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printExpr(expr);
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std.debug.warn("\n");
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},
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.Stmt => |stmt| blk: {
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printIdent(ident);
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printStmt(ident, stmt);
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std.debug.warn("\n");
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},
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else => {
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print(ident, "unknown node: {}\n", node);
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},
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}
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}
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fn parenthetize(name: []const u8, exprs: []*Expr) void {
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std.debug.warn("({}", name);
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for (exprs) |expr| {
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std.debug.warn(" ");
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printExpr(expr);
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}
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std.debug.warn(")");
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}
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pub fn printExpr(expr: *Expr) void {
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switch (expr.*) {
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.Binary => |binary| parenthetize(binary.op.lexeme, &[_]*Expr{ binary.left, binary.right }),
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.Logical => |binary| parenthetize(binary.op.lexeme, &[_]*Expr{ binary.left, binary.right }),
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.Unary => |unary| parenthetize(unary.op.lexeme, &[_]*Expr{unary.right}),
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.Grouping => |expr_ptr| parenthetize("group", &[_]*Expr{expr_ptr}),
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.Literal => |literal| {
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switch (literal) {
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.Bool => |val| std.debug.warn("{}", val),
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.Integer => |val| std.debug.warn("{}", val),
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.Float => |val| std.debug.warn("{}", val),
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.String => |val| std.debug.warn("'{}'", val),
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}
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},
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.Variable => |token| std.debug.warn("{}", token.lexeme),
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.VarDecl => |decl| {
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if (decl.mutable) {
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std.debug.warn("(mut ");
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} else {
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std.debug.warn("(");
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}
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std.debug.warn("let {} ", decl.assign.name.lexeme);
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printExpr(decl.assign.value);
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std.debug.warn(")");
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},
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.Assign => |assign| {
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std.debug.warn("(set ");
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std.debug.warn("{} ", assign.name.lexeme);
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printExpr(assign.value);
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std.debug.warn(")");
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},
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.Call => |call| {
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std.debug.warn("(");
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printExpr(call.callee);
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for (call.arguments.toSlice()) |arg| {
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std.debug.warn(" ");
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printExpr(arg);
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}
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std.debug.warn(")");
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},
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else => std.debug.warn("UnknownExpr-{}", @tagName(expr.*)),
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}
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}
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pub fn printStmt(ident: usize, stmt: *Stmt) void {
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switch (stmt.*) {
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.Println => |expr| parenthetize("println", &[_]*Expr{expr}),
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.Expr => |expr| printExpr(expr),
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.If => |ifstmt| {
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std.debug.warn("(if ");
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printExpr(ifstmt.condition);
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std.debug.warn(" ");
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printBlock(ident + 1, ifstmt.then_branch, false);
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if (ifstmt.else_branch) |else_branch| {
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std.debug.warn(" else ");
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printBlock(ident + 1, else_branch, false);
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}
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std.debug.warn(")\n");
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},
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.Loop => |loop| {
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std.debug.warn("(loop ");
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if (loop.condition) |cond| {
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printExpr(cond);
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} else {
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std.debug.warn("true");
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}
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std.debug.warn(" ");
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printBlock(ident + 1, loop.then_branch, false);
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std.debug.warn(")\n");
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},
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.Return => |ret| {
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std.debug.warn("(return ");
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printExpr(ret.value);
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std.debug.warn(")\n");
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},
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else => std.debug.warn("UnknownStmt-{}", @tagName(stmt.*)),
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}
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}
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@ -4,6 +4,7 @@ const main = @import("main.zig");
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const ast = @import("ast.zig");
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const tokens = @import("tokens.zig");
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const err = @import("errors.zig");
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const printer = @import("ast_printer.zig");
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const Allocator = std.mem.Allocator;
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const Scanner = scanners.Scanner;
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@ -392,6 +393,7 @@ pub const Parser = struct {
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return switch (self.peek().ttype) {
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.Fn => try self.parseFnDecl(),
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.Const => try self.parseConstDecl(),
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// TODO .Struct => try self.parseStructDecl(),
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else => |ttype| blk: {
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self.doError("(basic) expected fn/const, got {}\n", ttype);
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@ -408,7 +410,7 @@ pub const Parser = struct {
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while (self.peek().ttype != .RightBrace) {
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var stmt = try self.parseDecl();
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ast.printNode(try self.mkStmt(stmt), 0);
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printer.printNode(try self.mkStmt(stmt), 0);
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try stmts.append(stmt);
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}
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@ -442,7 +444,7 @@ pub const Parser = struct {
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while (self.peek().ttype != .RightBrace) {
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var stmt = try self.parseDecl();
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ast.printNode(try self.mkStmt(stmt), 0);
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printer.printNode(try self.mkStmt(stmt), 0);
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try block.append(stmt);
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}
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@ -49,7 +49,7 @@ pub const Runner = struct {
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var it = root.Root.iterator();
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std.debug.warn("parse tree\n");
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ast.printNode(root, 0);
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printer.printNode(root, 0);
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return Result.Ok;
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}
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