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stage2: period and suffixop

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pfg 2020-07-16 04:22:05 -07:00
parent e079fdeee7
commit 83a0073b68
1 changed files with 39 additions and 0 deletions
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39
src-self-hosted/astgen.zig
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@ -33,6 +33,8 @@ pub fn expr(mod: *Module, scope: *Scope, node: *ast.Node) InnerError!*zir.Inst {
.GreaterOrEqual => return cmp(mod, scope, node.castTag(.GreaterOrEqual).?, .gte),
.LessThan => return cmp(mod, scope, node.castTag(.LessThan).?, .lt),
.LessOrEqual => return cmp(mod, scope, node.castTag(.LessOrEqual).?, .lte),
.Period => return field(mod, scope, node.castTag(.Period).?),
.SuffixOp => return suffixOp(mod, scope, node.castTag(.SuffixOp).?),
.BoolNot => return boolNot(mod, scope, node.castTag(.BoolNot).?),
else => return mod.failNode(scope, node, "TODO implement astgen.Expr for {}", .{@tagName(node.tag)}),
}
@ -121,6 +123,43 @@ fn assign(mod: *Module, scope: *Scope, infix_node: *ast.Node.SimpleInfixOp) Inne
}
}
/// Identifier nodes -> ZIR string instruction
pub fn identifierString(mod: *Module, scope: *Scope, node: *ast.Node.Identifier) InnerError!*zir.Inst {
const tree = scope.tree();
const src = tree.token_locs[node.token].start;
var ident_name = tree.tokenSlice(node.token);
if (std.mem.startsWith(u8, ident_name, "@"))
ident_name = ident_name[2 .. ident_name.len - 1];
return mod.addZIRInst(scope, src, zir.Inst.Str, .{ .bytes = ident_name }, .{});
}
fn field(mod: *Module, scope: *Scope, node: *ast.Node.SimpleInfixOp) InnerError!*zir.Inst {
const tree = scope.tree();
const src = tree.token_locs[node.op_token].start;
const lhs = try expr(mod, scope, node.lhs);
const field_name = try identifierString(mod, scope, node.rhs.castTag(.Identifier).?);
const pointer = try mod.addZIRInst(scope, src, zir.Inst.FieldPtr, .{ .object_ptr = lhs, .field_name = field_name }, .{});
return mod.addZIRInst(scope, src, zir.Inst.Deref, .{ .ptr = pointer }, .{});
}
fn suffixOp(mod: *Module, scope: *Scope, node: *ast.Node.SuffixOp) InnerError!*zir.Inst {
switch (node.op) {
.Deref => {
const tree = scope.tree();
const src = tree.token_locs[node.rtoken].start;
const lhs = try expr(mod, scope, node.lhs);
return mod.addZIRInst(scope, src, zir.Inst.Deref, .{ .ptr = lhs }, .{});
},
else => return mod.failNode(scope, &node.base, "TODO implement astGenExpr for suffixOp {}", .{node.op}),
}
}
fn add(mod: *Module, scope: *Scope, infix_node: *ast.Node.SimpleInfixOp) InnerError!*zir.Inst {
const lhs = try expr(mod, scope, infix_node.lhs);
const rhs = try expr(mod, scope, infix_node.rhs);