diff options
Diffstat (limited to 'src/tparse/tree-list.go')
-rw-r--r-- | src/tparse/tree-list.go | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/src/tparse/tree-list.go b/src/tparse/tree-list.go new file mode 100644 index 0000000..70f5fff --- /dev/null +++ b/src/tparse/tree-list.go @@ -0,0 +1,124 @@ +/* + Copyright 2020 Kyle Gunger + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. +*/ + +package tparse + +// Parse a list of values +func parseValueList(tokens *[]Token, tok, max int) (Node, int) { + out := Node{} + out.Data = Token{Type: 10, Data: "list"} + var tmp Node + + tok++ + + for ; tok < max; tok++ { + t := (*tokens)[tok] + + switch t.Data { + case ")", "]", "}": + return out, tok + case ",": + tok++ + default: + errOut("Error: unexpected token when parsing a list of values", t) + } + + tmp, tok = parseValue(tokens, tok, max) + out.Sub = append(out.Sub, tmp) + } + + return out, tok +} + +// Parses a list of things +func parseDefList(tokens *[]Token, tok, max int) (Node, int) { + out := Node{} + out.Data = Token{Type: 9, Data: "list"} + + currentType := Node{} + currentType.Data = Token{Data: "undefined"} + + for ; tok < max; tok++ { + t0 := (*tokens)[tok] + t1 := (*tokens)[tok+1] + + switch t1.Data { + case ")", "]", "}", ",": + default: + currentType, tok = parseType(tokens, tok, max, true) + t0 = (*tokens)[tok] + t1 = (*tokens)[tok+1] + } + + switch t0.Type { + + case DEFWORD: + var tmp Node + if currentType.Data.Data == "undefined" { + errOut("Error: expected type before first parameter", t0) + } else if currentType.Data.Data == "type" { + tmp, tok = parseType(tokens, tok, max, true) + } else { + tmp = Node{Data: t0} + } + + typ := currentType + makeParent(&typ, tmp) + makeParent(&out, typ) + + default: + errOut("Error: unexpected token when parsing list, expected user-defined variable or ", t0) + } + + switch t1.Data { + case ")", "]", "}": + return out, tok + case ",": + default: + errOut("Error: unexpected token when parsing list, expected ',' or end of list", t1) + } + + tok++ + } + + return out, tok +} + +func parseTypeList(tokens *[]Token, tok, max int) (Node, int) { + out := Node{} + out.Data = Token{Type: 9, Data: "list"} + var tmp Node + + tok++ + + for ; tok < max; tok++ { + t := (*tokens)[tok] + + switch t.Data { + case ")", "]", "}": + return out, tok + case ",": + tok++ + default: + errOut("Error: unexpected token when parsing a list of types", t) + } + + tmp, tok = parseType(tokens, tok, max, true) + out.Sub = append(out.Sub, tmp) + } + + return out, tok +} |